Encyclopedia Astronautica
April 26


April 26 Chronology


1942 April 26 - .
1948 April 26 - .
  • XS-1 Flight 88 - . Crew: Fitzgerald. Payload: XS-1 # 1 flight 51. Nation: USA. Related Persons: Fitzgerald. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Summary: AF flight 29. Aborted because of inconsistent rocket operation. Reached mach 0.9..

1950 April 26 - .
  • OKB-1 founded. - . Nation: USSR. Summary: Decree 'On creation of OKB-1 within NII-88' was issued..

1950 April 26 - .
  • XS-1 Flight 132 - . Crew: Yeager. Payload: XS-1 # 1 flight 78. Nation: USA. Related Persons: Yeager. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Summary: AF flight 56. Lateral stability and control investigation..

1950 April 26 - . 01:11 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee XASR-SC-2. LV Configuration: Aerobee XASR-SC-2 SC 11.
  • Air Sampling Aeronomy mission - . Nation: USA. Agency: USA. Apogee: 100 km (60 mi). Summary: Composition research. Launched at 1811 local time. Reached 99.5 km..

1951 April 26 - . Launch Site: White Sands. Launch Complex: White Sands LC33. LV Family: Hermes. Launch Vehicle: Hermes A-1. LV Configuration: Hermes A-1 6.
  • Test mission - . Nation: USA. Agency: USA. Apogee: 24 km (14 mi).

1954 April 26 - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. LV Family: R-1. Launch Vehicle: R-1 8A11. LV Configuration: R-1 8A11 No 1912.
  • Operational test - . Nation: USSR. Agency: Korolev. Apogee: 100 km (60 mi).

1955 April 26 - . Launch Site: White Sands. LV Family: Nike. Launch Vehicle: Nike. LV Configuration: Nike 1762T.
  • Test mission - . Nation: USA. Agency: USA. Apogee: 10 km (6 mi).

1957 April 26 - . 20:12 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC5. LV Family: Jupiter. Launch Vehicle: Jupiter. LV Configuration: Jupiter IRBM AM-1B. FAILURE: Failure. Failed Stage: 1.
  • Research and development test - . Nation: USA. Agency: USAF; NASA Huntsville. Summary: Fired from AMR at 1512 hours EST to test the design version of the airframe and rocket engine. The flight terminated at 93 seconds because of propellant slosh. The missile achieved an altitude of 60,000 feet. The flight was partially successful..

1960 April 26 - . LV Family: Saturn I. Launch Vehicle: Saturn I.
  • Douglas to build the second stage (S-IV) of the Saturn C-1 - . Nation: USA. Program: Apollo. Summary: NASA announced the selection of the Douglas Aircraft Company to build the second stage (S-IV) of the Saturn C-1 launch vehicle..

1960 April 26 - . Launch Site: Wallops Island. LV Family: Honest John. Launch Vehicle: HJ Nike Gosling. FAILURE: Failure.
  • Porous re-entry vehicle test flight - . Nation: USA. Agency: NASA. Apogee: 43 km (26 mi).

1960 April 26 - . 01:13 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC29A. LV Family: Polaris. Launch Vehicle: Polaris A1. LV Configuration: Polaris A1X-22.
  • Test mission - . Nation: USA. Agency: USN. Apogee: 500 km (310 mi).

1961 April 26 - .
  • Dyna-Soar system package program. - . Nation: USA. Spacecraft: Dynasoar. The Dyna-Soar program office completed a system package program, further elaborating the three-step approach. Under Step 1, 20 air-launch tests would not begin until January 1964 and overlap with the beginning of space launches. The first of two unmanned launches would take place in August 1964, followed by 12 manned suborbital launches atop a Titan 2 beginning in April 1965, which would extend the speed envelope gradually from 4.9 km/s to 6.7 km/s. Step 2A would be completed with a single orbital flight from Cape Canaveral to Edwards Air Force Base in April 1966. The interim operational vehicle, capable of reconnaissance, satellite inspection, space logistics missions, and bombing, would be available in October 1967. The complete weapons system, including space-to-earth and space-to-space missiles, would become operational in late 1971.

1962 April 26 - . Launch Site: Vandenberg.
  • First West Coast launch of a Scout space booster. - . Nation: USA.

1962 April 26 - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout X-2. LV Configuration: Scout X-2 S111. FAILURE: Failure.. Failed Stage: U.
  • Solrad 4B - . Payload: GRAB 4B. Mass: 91 kg (200 lb). Nation: USA. Agency: USN. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: GRAB. Decay Date: 1962-04-26 . COSPAR: F620426A. Summary: Solar radiation monitor..

1962 April 26 - . 10:02 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Vostok 8K72K.
  • Cosmos 4 - . Payload: Zenit-2 11F61 s/n 2. Mass: 4,610 kg (10,160 lb). Nation: USSR. Related Persons: Nikolayev; Popovich. Agency: RVSN. Class: Surveillance. Type: Military surveillance satellite. Flight: Vostok 3; Vostok 4. Spacecraft: Zenit-2. Duration: 3.00 days. Decay Date: 1962-04-29 . USAF Sat Cat: 287 . COSPAR: 1962-Xi-1. Apogee: 317 km (196 mi). Perigee: 285 km (177 mi). Inclination: 65.0000 deg. Period: 90.50 min. Area survey photo reconnaissance satellite. Program partially completed. Failure of primary spacecraft orientation system. It was to spend four days in space, to be followed by another mission during 5-10 May. This meant that Vostok 3/4 could not be launched before 20-30 May. The cosmonaut prime crew returned from their in-suit parachute training at Fedosiya.

1962 April 26 - . 16:00 GMT - . Launch Site: Wallops Island. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.110GI.
  • Japan / US Ionosphere D-Reg Ionosphere mission - . Nation: USA. Apogee: 128 km (79 mi).

1962 April 26 - . 18:00 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Thor Delta. LV Configuration: Thor Delta 320/D9.
  • Ariel 1 - . Payload: UK 1 (S-51). Mass: 60 kg (132 lb). Nation: UK. Agency: NASA. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Ariel. Decay Date: 1976-03-31 . USAF Sat Cat: 285 . COSPAR: 1962-Omicron-1. Apogee: 1,203 km (747 mi). Perigee: 398 km (247 mi). Inclination: 53.8000 deg. Period: 100.80 min. Summary: Ionospheric studies; returned X-ray, ionospheric, cosmic ray data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1962 April 26 - . 18:56 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas Agena B. LV Configuration: Atlas Agena B 118D / Agena B SPS 2401.
  • Samos 7 - . Payload: Samos E-6 no. 1 / Agena B 2401. Mass: 1,588 kg (3,500 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: Samos. Decay Date: 1962-04-28 . USAF Sat Cat: 286 . COSPAR: 1962-Pi-1. Summary: Second generation photo surveillance; radio relay of images; Satellite and Missile Observation Satellite. Poor results..
  • FTV 2401 RV - . Payload: E-6 RV. Nation: USA. Agency: USAF. Spacecraft: Samos. COSPAR: 1962-Pi-xx.

1963 April 26 - . Launch Site: Baikonur. Launch Complex: Baikonur LC41/4. LV Family: R-16. Launch Vehicle: R-16U.
  • Operational test launch - . Nation: USSR. Agency: RVSN. Apogee: 1,210 km (750 mi).

1963 April 26 - . Launch Site: Hammaguira. Launch Complex: Hammaguira Bacchus. LV Family: Belier. Launch Vehicle: Dragon 1. LV Configuration: Dragon D-04. FAILURE: Failure.
  • Test mission - . Nation: France. Agency: CNES. Apogee: 58 km (36 mi).

1963 April 26 - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout X-2M. LV Configuration: Scout X-2M S121. FAILURE: Failure.. Failed Stage: U.
  • P 35-4 - . Payload: OPS 1298. Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: Program 35. Decay Date: 1963-04-26 . COSPAR: F630426B. Summary: Military weather satellite to provide targetting information for reconnaisance satellites..

1963 April 26 - . 18:31 GMT - . Launch Site: ETR Launch Area. Launch Platform: EAG-154. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3X-20.
  • Test mission - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1963 April 26 - . 20:13 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 372 / Agena D 1411. FAILURE: Attitude sensors were misaligned. No orbit.. Failed Stage: G.
  • KH-5 9055A - . Payload: KH-5 s/n 9055A. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-5. Decay Date: 1963-04-26 . COSPAR: F630426AA. Summary: Mission failed..

1964 April 26 - . Launch Site: Baikonur. Launch Complex: Baikonur LC67/22. LV Family: Tsiklon. Launch Vehicle: R-36 8K67. FAILURE: Failure.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 0 km ( mi).

1965 April 26 - .
  • First Apollo CM heatshields - . Nation: USA. Program: Apollo. Spacecraft: Apollo CSM; CSM Block I. Summary: North American received CM 009 forward and crew compartment heatshields from Avco Corporation. These heatshields were the first CM heatshields received by the contractor with complete ablative application..

1965 April 26 - . Launch Site: Baikonur. Launch Complex: Baikonur LC41/4. LV Family: R-16. Launch Vehicle: R-16U.
  • Operational test launch - . Nation: USSR. Agency: RVSN. Apogee: 1,210 km (750 mi).

1966 April 26 - . Launch Site: Baikonur. Launch Complex: Baikonur LC41/4. LV Family: R-16. Launch Vehicle: R-16U.
  • Military training launch - . Nation: USSR. Agency: RVSN. Apogee: 1,210 km (750 mi).

1966 April 26 - . Launch Site: Baikonur. Launch Complex: Baikonur PU32. LV Family: Tsiklon. Launch Vehicle: R-36 8K67.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1966 April 26 - . 00:12 GMT - . Launch Site: Sonmiani. LV Family: Apache. Launch Vehicle: Nike Apache. LV Configuration: Nike Apache NASA 14.249IM.
  • Rehbar 13 (Gren / TMA) Aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 190 km (110 mi).

1966 April 26 - . 10:04 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar LC86/1. LV Family: Kosmos 2. Launch Vehicle: Kosmos 11K63.
  • Cosmos 116 - . Payload: DS-P1-Yu s/n 6. Mass: 325 kg (716 lb). Nation: USSR. Agency: MO. Program: DS. Class: Military. Type: Military target satellite. Spacecraft: DS-P1-Yu. Completed Operations Date: 1966-12-03 . Decay Date: 1966-12-03 . USAF Sat Cat: 2152 . COSPAR: 1966-036A. Apogee: 464 km (288 mi). Perigee: 288 km (178 mi). Inclination: 48.4000 deg. Period: 92.00 min. Summary: Development of systems for air defence and the control of outer space..

1967 April 26 - .
  • Komarov state funeral. - . Nation: USSR. Related Persons: Komarov. Program: Soyuz. Flight: Soyuz 1. Summary: Komarov's ashes are interred in the wall of the Kremlin..

1967 April 26 - . 04:15 GMT - . Launch Site: Fort Churchill. LV Family: Black Brant. Launch Vehicle: Black Brant 5B. LV Configuration: Black Brant VB AFF-VB-06.
  • Test / ionosphere / plasma mission - . Nation: Canada. Agency: NRCC. Apogee: 396 km (246 mi).

1967 April 26 - . 10:06 GMT - . Launch Site: San Marco. LV Family: Scout. Launch Vehicle: Scout B. LV Configuration: Scout B S153C.
  • San Marco 2 - . Payload: San Marco B. Mass: 129 kg (284 lb). Nation: Italy. Agency: CRS. Class: Earth. Type: Atmosphere satellite. Spacecraft: San Marco. Decay Date: 1967-10-14 . USAF Sat Cat: 2761 . COSPAR: 1967-038A. Apogee: 741 km (460 mi). Perigee: 219 km (136 mi). Inclination: 2.9000 deg. Period: 94.20 min. Summary: Atmospheric density data. Scientific satellite launched from a mobile range off Formosa Bay (Kenya). .

1967 April 26 - . 18:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 3B. LV Configuration: Titan IIIB 3B-5. FAILURE: Stage 2 engine lost thrust.. Failed Stage: 2.
  • OPS 4243 - . Payload: KH-8 no. 05 / Agena D. Mass: 3,000 kg (6,600 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-8. Decay Date: 1967-04-26 . COSPAR: F670426A. Summary: KH-8 type satellite..
  • SRV-1 - . Payload: SRV-1. Nation: USA. Agency: USAF. Spacecraft: KH-8. COSPAR: F670426B.
  • SRV-2 - . Payload: SRV-2. Nation: USA. Agency: USAF. Spacecraft: KH-8. COSPAR: F670426C.

1967 April 26 - . 19:20 GMT - . Launch Site: Silver Lake DZ. Launch Pad: 35.3 N x 116.1 W. Launch Platform: NB-52 008. LV Family: X-15. Launch Vehicle: X-15. LV Configuration: X-15 3-58-87. FAILURE: Emergency landing at Silver Lake..
  • X-15A Telem/HT/Guidance test - . Nation: USA. Agency: NASA; USAF. Apogee: 16 km (9 mi). Summary: Maximum Speed - 1871 kph. Maximum Altitude - 16280 m..

1968 April 26 - .
  • State Commission on the Gagarin crash. - . Nation: USSR. Related Persons: Gagarin. Summary: The course and manoeuvres taken by the aircraft in its last minutes has been determined from radar data and the on-board recorder..

1968 April 26 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 657. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3P.
  • Follow-on operational missile test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1968 April 26 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 657. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3P.
  • Follow-on operational missile test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1968 April 26 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 657. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3P.
  • Follow-on operational missile test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1968 April 26 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 657. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3P.
  • Follow-on operational missile test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1968 April 26 - . 04:42 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar LC86/4. LV Family: Kosmos 2. Launch Vehicle: Kosmos 11K63.
  • Cosmos 219 - . Payload: DS-U2-D s/n 2. Mass: 300 kg (660 lb). Nation: USSR. Agency: MO. Program: DS. Class: Earth. Type: Magnetosphere satellite. Spacecraft: DS-U2-D. Decay Date: 1969-03-02 . USAF Sat Cat: 3220 . COSPAR: 1968-038A. Apogee: 1,745 km (1,084 mi). Perigee: 215 km (133 mi). Inclination: 48.4000 deg. Period: 104.60 min. Summary: Studied charged particle flows..

1968 April 26 - . 19:51 GMT - . Launch Site: Delamar Dry Lake DZ. Launch Pad: 37.3 N x 114.9 W. Launch Platform: NB-52 008. LV Family: X-15. Launch Vehicle: X-15. LV Configuration: X-15 1-76-134.
  • X-15A SA TPS/HS Test/Technology mission - . Nation: USA. Agency: NASA; USAF. Apogee: 63 km (39 mi). Summary: Maximum Speed - 5704 kph. Maximum Altitude - 63090 m..

1969 April 26 - .
  • Soyuz program review - . Nation: USSR. Related Persons: Volynov; Shonin; Kubasov; Filipchenko; Volkov; Gorbatko; Nikolayev; Sevastyanov; Kuklin; Grechko; Kolodin. Program: Soyuz. Flight: Soyuz 5; Soyuz 6; Soyuz 7; Soyuz 8; Soyuz n 17; Soyuz n 18; Soyuz n 19; Soyuz n 20. Spacecraft: Soyuz 7K-OK; Soyuz Kontakt. The commission considers plans for the rest of the Soyuz production. Spacecraft s/n 14, 15, and 16 are to fly in August 1969, 17 and 18 in November 1969, and 19 and 20 in February-March 1970. Crews selected for the August flights are: for spacecraft 14, Shonin and Kubasov; for 15, Filipchenko, Volkov, and Gorbatko; for 16, Nikolayev and Sevastyanov. Back-ups will be Kuklin, Grechko, and Kolodin. All of the spacecraft will fly 4 to 5 day missions. Spacecraft 15 and 16 will dock and remain together 2 or 3 days to form an 'orbital station'. Experiments planned for the flight are:

    • Visual observation of rocket launch plumes using the Svinets device
    • Film and photography of the spacecraft 15-16 docking from spacecraft 14
    • Demonstration of welding in weightless vacuum conditions using the Vulkan device
    • Demonstration of autonomous navigation by the cosmonauts using a sextant
    • Medium wave radio communications
    • Test of new television sensors for the Soyuz orientation system

    Spacecraft 17 through 20 will fly 15 to 16 day missions to demonstrate the new SZhO life support system for the L3, and conduct rendezvous and docking operations using the L3's Kontakt system. Additional Details: Soyuz program review.


1969 April 26 - . Launch Site: Kourou. Launch Complex: Kourou ALFS. LV Family: Belier. Launch Vehicle: Dragon 3. LV Configuration: Dragon 3 D-302.
  • FU-188 Technology test - . Nation: France. Agency: CNES. Apogee: 410 km (250 mi).

1969 April 26 - . 17:00 GMT - . Launch Site: Thumba. LV Family: Apache. Launch Vehicle: Nike Apache. LV Configuration: Nike Apache NASA 14.403IG.
  • ISRO 40.04 X-ray astronomy mission - . Nation: USA. Agency: NASA. Apogee: 144 km (89 mi).

1970 April 26 - . 13:05 GMT - . Launch Site: Kheysa. LV Family: MR-12. Launch Vehicle: MR-12.
  • Aeronomy mission - . Nation: USSR. Apogee: 175 km (108 mi).

1971 April 26 - .
  • Quarantine for crew members who would go to the moon on future Apollo flights was discontinued - . Nation: USA. Related Persons: Low, George. Program: Apollo. Flight: Apollo 15. Acting NASA Administrator George M. Low discontinued the quarantine for future Apollo flights to the moon beginning with the Apollo 15 mission. The decision was based on a recommendation of the Interagency Committee on Back Contamination (ICBC). The ICBC would continue as an active body, however, at least until the results of the last Apollo lunar mission were reviewed. Biomedical characterization of returned lunar samples would also be continued.

1971 April 26 - . Launch Site: El Arenosillo. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.387II.
  • Ionosphere mission - . Nation: USA. Agency: NASA. Apogee: 100 km (60 mi).

1971 April 26 - . Launch Site: El Arenosillo. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.388II.
  • Ionosphere mission - . Nation: USA. Agency: NASA. Apogee: 100 km (60 mi).

1971 April 26 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF07. LV Family: Minuteman. Launch Vehicle: Minuteman 1B.
  • FOT GT93B Follow-on Test launch - . Nation: USA. Agency: USAF SAC. Apogee: 1,300 km (800 mi).

1971 April 26 - . 19:34 GMT - . Launch Site: El Arenosillo. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.386II.
  • Ionosphere mission - . Nation: USA. Agency: NASA. Apogee: 100 km (60 mi).

1971 April 26 - . 19:34 GMT - . Launch Site: El Arenosillo. LV Family: Belier. Launch Vehicle: Centaure. LV Configuration: Centaure C136.
  • INTA C-7101 Aeronomy mission - . Nation: France. Agency: CNES. Apogee: 129 km (80 mi).

1971 April 26 - . 22:15 GMT - . Launch Site: El Arenosillo. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.319II.
  • INTA NC-7101 Ionosphere mission - . Nation: USA. Agency: NASA. Apogee: 154 km (95 mi).

1972 April 26 - . 14:30 GMT - . Launch Site: Thumba. LV Family: M-100. Launch Vehicle: M-100. LV Configuration: M-100 TERLS-433.
  • ISRO-8.70 - . Nation: USSR. Apogee: 85 km (52 mi).

1973 April 26 - . 06:20 GMT - . Launch Site: Pacific Ocean. Launch Pad: 27.0 N x 125.0 W. Launch Platform: T-AGM-8. LV Family: Sandhawk. Launch Vehicle: Hydra Sandhawk.
  • LRL BOX-18 X-ray astronomy mission - . Nation: USA. Agency: USN NMC. Apogee: 262 km (162 mi).

1974 April 26 - . 14:23 GMT - . Launch Site: Plesetsk. LV Family: R-7. Launch Vehicle: Molniya 8K78M.
  • Molniya 2-09 - . Payload: Molniya-2. Mass: 1,600 kg (3,500 lb). Nation: USSR. Agency: MOM. Program: Molniya. Class: Communications. Type: Military communications satellite. Spacecraft: Molniya-2. USAF Sat Cat: 7276 . COSPAR: 1974-026A. Apogee: 35,168 km (21,852 mi). Perigee: 1,309 km (813 mi). Inclination: 64.4000 deg. Period: 640.60 min. Continued operation of the long-range telephone and telegraph radio-communication system within the Soviet Union and transmission of USSR central television programmes to stations in the Orbita and participating international networks (international cooperation scheme).

1975 April 26 - . 15:10 GMT - . Launch Site: ETR Launch Area. Launch Platform: SSBN 609. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3T.
  • Demonstration and shakedown operations launch - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1976 April 26 - .
1976 April 26 - . 23:19 GMT - . Launch Site: Kwajalein. Launch Vehicle: Rocketsonde.
  • Arcasonde - . Nation: USA. Agency: MRN. Apogee: 81 km (50 mi).

1977 April 26 - .
1977 April 26 - . 14:45 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC43/3. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Cosmos 905 - . Payload: Yantar-2K s/n 6. Mass: 6,600 kg (14,500 lb). Nation: USSR. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: Yantar-2K. Duration: 30.00 days. Decay Date: 1977-05-26 . USAF Sat Cat: 9937 . COSPAR: 1977-030A. Apogee: 413 km (256 mi). Perigee: 170 km (100 mi). Inclination: 67.1000 deg. Period: 90.30 min. Sixth Yantar second generation reconnaissance test flight and first completely successful flight. Both small SpK film capsules successfully recovered during course of flight, as was the main OSA cabin with its camera, computer, and main film cannisters. First full duration Yantar flight.

1978 April 26 - . Launch Site: Natal. LV Family: Sonda. Launch Vehicle: Sonda 3. LV Configuration: Sonda 3 XV-05.
  • Ionosphere mission - . Nation: Brazil. Agency: IAE. Apogee: 615 km (382 mi).

1978 April 26 - . 10:20 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout D-1. LV Configuration: Scout D-1 S201C.
  • HCMM - . Payload: AEM 1. Mass: 134 kg (295 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Atmosphere satellite. Spacecraft: AEM. Decay Date: 1981-12-22 . USAF Sat Cat: 10818 . COSPAR: 1978-041A. Apogee: 641 km (398 mi). Perigee: 560 km (340 mi). Inclination: 97.6000 deg. Period: 96.70 min. Summary: Heat Capacity Mapping Mission; prodeuced thermal maps of atmosphere. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). .

1979 April 26 - . 23:00 GMT - . Launch Site: Koroni. LV Family: M-100. Launch Vehicle: M-100.
  • - . Nation: USSR. Apogee: 84 km (52 mi).

1980 April 26 - . 22:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 34F.
  • Navstar 6 - . Payload: GPS SVN 6 / OPS 5118. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 11783 . COSPAR: 1980-032A. Apogee: 20,471 km (12,720 mi). Perigee: 19,387 km (12,046 mi). Inclination: 62.8000 deg. Period: 707.80 min. Summary: Global Positioning System..

1981 April 26 - . 21:01 GMT - . Launch Site: Barking Sands. Launch Vehicle: Rocketsonde.
  • Arcasonde - . Nation: USA. Agency: MRN. Apogee: 73 km (45 mi).

1982 April 26 - . 20:00 GMT - . Launch Site: Eareckson. Launch Vehicle: Rocketsonde.
  • Arcasonde - . Nation: USA. Agency: MRN. Apogee: 54 km (33 mi).

1983 April 26 - . 10:00 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC31. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Cosmos 1457 - . Payload: Yantar-4K1 s/n 214. Mass: 6,600 kg (14,500 lb). Nation: USSR. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: Yantar-4K1. Duration: 45.00 days. Decay Date: 1983-06-08 . USAF Sat Cat: 14039 . COSPAR: 1983-039A. Apogee: 354 km (219 mi). Perigee: 164 km (101 mi). Inclination: 70.4000 deg. Period: 89.70 min. Summary: High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission..

1984 April 26 - . 02:40 GMT - .
1985 April 26 - . 05:48 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC31. LV Family: R-7. Launch Vehicle: Molniya 8K78M. LV Configuration: Molniya 8K78M-SOL.
  • Intercosmos 23 - . Payload: SO-M s/n 510. Mass: 1,000 kg (2,200 lb). Nation: USSR. Agency: MOM. Program: Intercosmos. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Prognoz. Completed Operations Date: 1985-11-19 . Decay Date: 1994-01-12 . USAF Sat Cat: 15661 . COSPAR: 1985-033A. Apogee: 194,734 km (121,001 mi). Perigee: 5,975 km (3,712 mi). Inclination: 76.8000 deg. Period: 5,783.70 min. Magnetosphere and solar wind investigations. Prognoz-10-Intercosmos. Investigation of the structure of interplanetary and circumterrestrial shock waves generated by the interaction of the solar wind and the earth's magnetosphere. Carries scientific apparatus developed by scientists and specialists o f the USSR and the Czechoslovak Socialist Republic in the 'Intercosmos' programme of international cooperation in the exploration and peaceful uses of outer space.

1986 April 26 - .
  • Major nuclear accident at Soviet Union's Chernobyl power station alarms world - . Nation: USSR.

1986 April 26 - . Launch Site: Baikonur. Launch Complex: Baikonur Jubilee.
1987 April 26 - . 20:05 GMT - . Launch Site: Kheysa. LV Family: M-100. Launch Vehicle: M-100B.
  • - . Nation: USSR. Apogee: 87 km (54 mi).

1988 April 26 - . 01:57 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout G. LV Configuration: Scout G-1 S211C.
  • Transit O-23 - . Mass: 64 kg (141 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. USAF Sat Cat: 19070 . COSPAR: 1988-033A. Apogee: 1,301 km (808 mi). Perigee: 1,016 km (631 mi). Inclination: 90.4000 deg. Period: 108.50 min. Summary: Dual launch of operational Transits manufactured in the 1960's to replenish the constellation..
  • Transit O-32 - . Mass: 64 kg (141 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. USAF Sat Cat: 19071 . COSPAR: 1988-033B. Apogee: 1,298 km (806 mi). Perigee: 1,017 km (631 mi). Inclination: 90.4000 deg. Period: 108.50 min.

1988 April 26 - . 03:15 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC200/39. LV Family: Proton. Launch Vehicle: Proton-K/DM-2. LV Configuration: Proton-K/DM-2 332-01.
  • Cosmos 1940 - . Payload: SPRN No. 5. Mass: 2,000 kg (4,400 lb). Nation: USSR. Agency: MOM. Class: Earth. Type: Weather satellite. Spacecraft: Prognoz SPRN. Completed Operations Date: 1988-09-01 . USAF Sat Cat: 19073 . COSPAR: 1988-034A. Apogee: 35,764 km (22,222 mi). Perigee: 35,590 km (22,110 mi). Inclination: 9.0000 deg. Period: 1,430.50 min. Given on Western lists as a geosynchronous ballistic missile early warning satellite. However not listed as such in Russian lists, and officially ...'conducted atmospheric, ocean studies. Investigation of the seas and oceans and the processes occurring in the earth's atmosphere'. So may have carried test instruments for second generation SPRN or had other purposes. Stationed initially at 12 deg E; Positioned in geosynchronous orbit at 24 deg W in 1988 As of 1 September 2001 located at 49.66 deg W drifting at 1.409 deg E per day. As of 2007 Mar 9 located at 70.52W drifting at 1.424E degrees per day.

1989 April 26 - . 17:00 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC41/1. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Foton 5 - . Payload: Foton s/n 5L. Mass: 6,200 kg (13,600 lb). Nation: USSR. Agency: MOM. Class: Materials. Type: Materials science satellite. Spacecraft: Foton. Duration: 14.35 days. Decay Date: 1989-05-11 . USAF Sat Cat: 19941 . COSPAR: 1989-032A. Apogee: 377 km (234 mi). Perigee: 220 km (130 mi). Inclination: 62.8000 deg. Period: 90.50 min. Summary: 234 orbits. Materials processing. Space materials research (production of enhanced performance semiconductors and especially pure biologically active substances in microgravity conditions). Jointly with France..

1990 April 26 - . 01:37 GMT - . Launch Site: Plesetsk. LV Family: R-7. Launch Vehicle: Molniya 8K78M. LV Configuration: Molniya 8K78M-ML.
  • Molniya 1-77 - . Payload: Molniya-1T. Mass: 1,600 kg (3,500 lb). Nation: USSR. Agency: MOM. Program: Molniya. Class: Communications. Type: Military communications satellite. Spacecraft: Molniya-1T. Decay Date: 2005-02-25 . USAF Sat Cat: 20583 . COSPAR: 1990-039A. Apogee: 39,625 km (24,621 mi). Perigee: 724 km (449 mi). Inclination: 64.4000 deg. Period: 717.70 min. Summary: Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network. .

1991 April 26 - . 20:29 GMT - .
  • EVA Mir EO-8-4 - . Crew: Afanasyev; Manarov. EVA Type: Extra-Vehicular Activity. EVA Duration: 0.15 days. Nation: USSR. Related Persons: Afanasyev; Manarov. Program: Mir. Class: Manned. Type: Manned space station. Flight: Mir EO-8. Spacecraft: Mir. Summary: Inspected Kurs docking system antenna..

1993 April 26 - . 14:50 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC39A. LV Family: Shuttle. Launch Vehicle: Shuttle. LV Configuration: Space Shuttle STS-55.
  • STS-55 - . Call Sign: Columbia. Crew: Harris; Henricks; Nagel; Precourt; Ross; Schlegel; Walter. Payload: Columbia F14/USS/Spacelab D-2 LM. Mass: 12,185 kg (26,863 lb). Nation: USA. Related Persons: Harris; Henricks; Nagel; Precourt; Ross; Schlegel; Walter. Agency: NASA Houston. Program: STS. Class: Manned. Type: Manned spaceplane. Flight: STS-55. Spacecraft: Columbia. Duration: 9.99 days. Decay Date: 1993-05-06 . USAF Sat Cat: 22640 . COSPAR: 1993-027A. Apogee: 312 km (193 mi). Perigee: 304 km (188 mi). Inclination: 28.5000 deg. Period: 90.70 min. Summary: Manned seven crew. Carried German Spacelab-D2. Payloads: Spacelab D-2 with long module, unique support structure (USS), and Reaction Kinetics in Glass Melts (RKGM) getaway special, Shuttle Amateur Radio Experiment (SAREX) II..
  • Spacelab D-2 LM - . Payload: Spacelab Long Module. Nation: USA. Agency: NASA. Program: Spacelab. Class: Manned. Type: Manned space laboratory. Spacecraft: Spacelab. COSPAR: 1993-027xx.
  • USS - . Nation: USA. Agency: NASA. Program: STS. COSPAR: 1993-027xx.

1994 April 26 - . 02:14 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC133/3. LV Family: Kosmos 3. Launch Vehicle: Kosmos 11K65M.
  • Cosmos 2279 - . Mass: 825 kg (1,818 lb). Nation: Russia. Agency: MO. Class: Navigation. Type: Navigation satellite. Spacecraft: Parus. USAF Sat Cat: 23092 . COSPAR: 1994-024A. Apogee: 1,007 km (625 mi). Perigee: 956 km (594 mi). Inclination: 83.0000 deg. Period: 104.70 min. Summary: Military navigation satellite. Positioned in plane 6 of constellation..

1995 April 26 - . 02:20 GMT - . Launch Site: Ryori. LV Family: MT-135. Launch Vehicle: MT-135P. LV Configuration: MT-135P-R922.
  • Meteorological mission - . Nation: Japan. Agency: JMA. Apogee: 60 km (37 mi).

1996 April 26 - .
  • Mir News 300: Priroda successfully docked with Mir - . Nation: Russia. Program: Mir. Flight: Mir NASA-1; Mir EO-21. After an automatic approach guided by the system Kurs Priroda linked up with Mir complex on 26.04.1996 at 1243 UTC. Quite an achievement to aim and dock a mass of 20 tons (like a huge locomotive) with a precision of less than millimetres. Priroda can take a breath for a while at the forward axial docking port of the transition section (P.Kh.O.). During the first pass of both objects for our position in Mir orbit 58195, 1235-1239 UTC, it was obvious that there were no intentions to switch over to the manual remote control TORU. At 123530 UTC Onufriyenko reported that Priroda was hovering for a while in a distance of 182 M and that all was going well. From that distance Priroda started the final stage of the approach and flawlessly docked with Mir. Just like during the whole autonomous flight the Telemetry transmitters of Priroda in het UHF band could be monitored. During the passes after the docking these transmitters remained active. Reason for this is the fact that Priroda will remain electrically autonomous until the accomplishment of the repositioning to the +Z axis.

    On 27.04.1996 at 0800 UTC Priroda will remove itself with a manipulator arm (the Lyappa) to the +Z axis. After that operation the airseal can be checked before the opening of the hatches. The repositioning will take place out of our range.

    A part of the cargo of Priroda consists of biological experiments for the production of clean medical preparations and 900 KG equipment and experiments for the American astronaut Shannon Lucid. Priroda has been equipped by a lot of equipment for scientific research of the earth (all kinds of devices and camera's for remote sensing) and the atmosphere.

    Chris v.d. Berg, NL-9165/A-UK3202.


1998 April 26 - .
  • Cassini Venus Flyby - . Nation: USA. Spacecraft: Cassini.

1999 April 26 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 738. LV Family: Trident. Launch Vehicle: Trident D-5. LV Configuration: Trident D-5 FCET-21.
  • Trident D-5 84? operational test launch - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1999 April 26 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 738. LV Family: Trident. Launch Vehicle: Trident D-5. LV Configuration: Trident D-5 FCET-21.
  • 84? - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

2001 April 26 - .
  • STS-100 Mission Status Report #14 - . Nation: USA. Related Persons: Helms; Lonchakov. Program: ISS. Flight: ISS EO-2; STS-100. Good news greeted space station flight controllers this morning when, shortly after awakening, Expedition Two flight engineer Susan Helms reported that the International Space Station computer systems may be returning to normal. Working at a laptop computer aboard the station that serves as the crew's primary interface with the station's United States command and control computer system, Helms reported the good news at about 3:45 a.m. Shortly afterward, Helms performed a series of troubleshooting steps that restored the ground's ability to monitor and send commands to the station's U.S. systems. Additional Details: STS-100 Mission Status Report #14.

2002 April 26 - .
  • Starshine 2 Spacecraft Reenters Into Earth's Atmosphere - . Nation: USA. Spacecraft: Starshine.

2003 April 26 - . Launch Site: Mojave. Launch Vehicle: Tier One.
  • White Knight Flight 22 - . Nation: USA. Related Persons: Binnie; Melvill. Program: X-Prize. Spacecraft: SpaceShipOne. Summary: Flight Time: 0.3 hours Pilot: Melvill Copilot: Binnie. Objectives: Airshow for the 'friends and family' unveiling Results: Good show for 1000+ guests. Broadcast media included CNN, ABC, PBS, Tech TV, Discovery & National Geographic TV..

2003 April 26 - . 03:53 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz FG. LV Configuration: Soyuz-FG ?15000-006.
  • Soyuz TMA-2 - . Call Sign: Agat. Crew: Malenchenko; Lu. Backup Crew: Kaleri; Foale. Return Crew: Malenchenko; Lu; Duque. Payload: Soyuz TMA s/n 212. Mass: 7,250 kg (15,980 lb). Nation: Russia. Related Persons: Malenchenko; Lu; Kaleri; Foale; Duque. Agency: RAKA. Manufacturer: Korolev. Program: ISS. Class: Manned. Type: Manned spacecraft. Flight: ISS EO-7. Spacecraft: Soyuz TMA. Duration: 184.95 days. Decay Date: 2003-10-28 . USAF Sat Cat: 27781 . COSPAR: 2003-016A. Apogee: 394 km (244 mi). Perigee: 386 km (239 mi). Inclination: 51.6000 deg. Period: 92.40 min. Summary: Two-man Russian/American crew to provide minimal manning of space station while shuttle is grounded. Replaced three-man crew aboard ISS since before STS-107 disaster..

2004 April 26 - .
  • Opportunity Mars Rover, End of Primary Mission - . Nation: USA. Spacecraft: MER.

2004 April 26 - . 20:37 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC200/39. LV Family: Proton. Launch Vehicle: Proton-K/DM-2M. LV Configuration: Proton-K/DM-2M 410-06.
  • Ekspress AM-11 - . Mass: 2,542 kg (5,604 lb). Nation: Russia. Agency: Svyaz. Manufacturer: Reshetnev; Cannes. Class: Communications. Type: Civilian communications satellite. Spacecraft: Ekspress. USAF Sat Cat: 28234 . COSPAR: 2004-015A. Apogee: 35,788 km (22,237 mi). Perigee: 35,786 km (22,236 mi). Inclination: 0.1000 deg. Period: 1,436.10 min. Summary: Delayed from April 10. As of 2007 Mar 10 located at 79.96W drifting at 3.741W degrees per day..

2005 April 26 - . 07:31 GMT - . Launch Site: Kiritimati. Launch Pad: 0.0 N x 154.0 W. Launch Platform: ODYSSEY. LV Family: Zenit. Launch Vehicle: Zenit-3SL. LV Configuration: Zenit-3SL 15.
  • Spaceway 1 - . Mass: 6,080 kg (13,400 lb). Nation: USA. Agency: DirecTV. Manufacturer: El Segundo. Program: DirecTV. Class: Communications. Type: Civilian communications satellite. Spacecraft: HS 702. USAF Sat Cat: 28644 . COSPAR: 2005-015A. Apogee: 35,789 km (22,238 mi). Perigee: 35,785 km (22,235 mi). Inclination: 0.0000 deg. Period: 1,436.10 min. Summary: Heaviest single payload to geosynchronous transfer orbit to that date. Carried 48 high-frequency Ka-band transponders for data transmission and television broadcasting. As of 2007 Mar 10 located at 102.80W drifting at 0.005W degrees per day..

2006 April 26 - . 22:48 GMT - . Launch Site: Taiyuan. Launch Complex: Taiyuan LC1. LV Family: CZ. Launch Vehicle: CZ-4B. LV Configuration: Chang Zheng 4B CZ4B-9 (89).
  • Yaogan 1 - . Mass: 2,700 kg (5,900 lb). Nation: China. Agency: CNSA. Manufacturer: CASC. Class: Surveillance. Type: Military surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 29092 . COSPAR: 2006-015A. Apogee: 630 km (390 mi). Perigee: 627 km (389 mi). Inclination: 97.8000 deg. Period: 97.30 min. Summary: Remote sensing satellite built by the Shanghai SAST Group. In reality it was the first Chinese synthetic aperture radar military surveillance satellite..

2007 April 26 - . 21:32 GMT - . Launch Site: Barking Sands. Launch Complex: Barking Sands POA. Launch Platform: CG-70. LV Family: Standard-ER. Launch Vehicle: Standard SM-3. LV Configuration: SM-3 FTM-11.
  • FTM-11 - . Nation: USA. Agency: USN. Apogee: 160 km (90 mi).

2008 April 26 - . 22:16 GMT - . Launch Site: Baikonur. LV Family: R-7. Launch Vehicle: Soyuz FG. LV Configuration: Soyuz-FG/Fregat.
  • GIOVE B - . Mass: 530 kg (1,160 lb). Nation: Europe. Agency: Starsem. Class: Navigation. Type: Navigation satellite. Spacecraft: Galileo Navsat. USAF Sat Cat: 32781 . COSPAR: 2008-020A. Apogee: 23,244 km (14,443 mi). Perigee: 23,104 km (14,356 mi). Inclination: 56.0000 deg. Period: 842.60 min. Second European Galileo navigation system test satellite. The booster placed the Giove/Fregat stack on a suborbital trajectory. The Fregat stage then burned to enter a a 170 km parking orbit. The stage burned at least twice more before releasing the satellite into its operational orbit.

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