Encyclopedia Astronautica
April 27


April 27 Chronology


1912 April 27 - .
1913 April 27 - .
  • Birth of Viktor Ivanovich Kuznetsov - . Nation: Russia. Summary: Russian engineer. Chief Designer 1946-1989 of Nll-10 and NII-44. Specialised in missile and spaceship gyroscopes..

1942 April 27 - .
  • Birth of Dr Valeri Vladimirovich Polyakov - . Nation: Russia. Summary: Russian physician cosmonaut. Flew on Mir LD-2, Mir LD-4. Longest single space flight (437 days). 678 cumulative days in space. Civilian Physician, Institute of Medical Biological Problems..

1948 April 27 - .
  • Birth of Aleksandr Aleksandrovich Volkov - . Nation: Ukraine. Summary: Ukrainian pilot cosmonaut. Flew on Salyut 7 EO-4-2, Mir EO-4, Mir EO-10. Father of cosmonaut Sergei Volkov. 391 cumulative days in space..

1951 April 27 - .
  • XS-1 Flight 145 - . Crew: Crossfield. Payload: XS-1 # 2 flight 64. Nation: USA. Related Persons: Crossfield. Class: Manned. Type: Manned rocketplane. Spacecraft: XS-1. Summary: NACA flight 44. Plane and instrument check..

1953 April 27 - .
  • Birth of Ellen Louise Shulman Baker - . Nation: USA. Summary: Jewish-American physician mission specialist astronaut. Flew on STS-34, STS-50, STS-71. Physician..

1953 April 27 - . Launch Site: White Sands. LV Family: Honest John. Launch Vehicle: Honest John. LV Configuration: Honest John 185.
  • Test mission - . Nation: USA. Apogee: 10 km (6 mi).

1954 April 27 - . Launch Site: White Sands. LV Family: Nike. Launch Vehicle: Nike. LV Configuration: Nike 2256T.
  • Test mission - . Nation: USA. Agency: USA. Apogee: 10 km (6 mi).

1955 April 27 - . Launch Site: White Sands. LV Family: Nike. Launch Vehicle: Nike. LV Configuration: Nike 1919T.
  • Test mission - . Nation: USA. Agency: USA. Apogee: 10 km (6 mi).

1958 April 27 - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Sputnik 8A91. LV Configuration: Sputnik 8A91 B1-2. FAILURE: Launch vehicle disintegrated 88 seconds after liftoff.. Failed Stage: 0.
  • Sputnik failure - . Payload: D-1 s/n 1. Nation: USSR. Agency: MVS. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Sputnik 3. Decay Date: 1958-04-01 . COSPAR: F580427A.

1959 April 27 - .
  • Project Mercury astronauts reported for duty - . Nation: USA. Program: Mercury. The seven Project Mercury astronauts reported for duty. A tentative schedule of Mercury astronaut activities for the first months of training was issued. Actual training began the next day. Within 3 months the astronauts were acquainted with the various facets of the Mercury program. The first training week was as follows: Monday, April 27, check in; April 28, general briefing; April 29, spacecraft configuration and escape methods; April 30, support and restraint; May 1, operational concepts and procedures. These lectures were presented by specialists in the particular field of study. Besides the above, unscheduled activities involved 3 hours flying time and 4 hours of athletics.

1959 April 27 - .
  • Project Mercury was accorded the DX priority procurement rating. - . Nation: USA. Program: Mercury. Spacecraft: Mercury.

1959 April 27 - .
  • Mercury search and rescue procedures developed. - . Nation: USA. Program: Mercury. Class: Manned. Type: Manned spacecraft. Spacecraft: Mercury. Summary: Meeting of DOD working group on Project Mercury search and recovery operations was held at Patrick Air Force Base, with major emphasis placed on the first two ballistic Atlas shots, and command relationships..

1959 April 27 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC10. Launch Vehicle: Draco. FAILURE: Failure.
  • Test mission - . Nation: USA. Agency: USAF. Apogee: 0 km ( mi).

1960 April 27 - .
  • Explorer XI - . Nation: USA. Various gamma ray detectors were carried aboard Explorer XI on its orbital flight. These detectors found a directional flux of gamma radiation in space and thereby provided serious evidence against one formulation of the 'steady state' cosmological theory.

1960 April 27 - .
  • Dynasoar passes first design review. - . Nation: USA. Class: Manned. Type: Manned spaceplane. Spacecraft: Dynasoar. Summary: Completion of technical review of Dyna-Soar program announced by the Air Force..

1960 April 27 - . 04:18 GMT - . Launch Site: Wallops Island. LV Family: Aerobee. Launch Vehicle: Aerobee 150. LV Configuration: Aerobee 150 NASA 04.04GG.
  • Ultraviolet star photometer Ultraviolet astronomy mission - . Nation: USA. Agency: NASA. Apogee: 200 km (120 mi).

1961 April 27 - . LV Family: R-16. Launch Vehicle: R-16.
  • R-16U silo-based ICBM operational plan issued. - . Nation: USSR. Summary: State Committee for Defence Technology (GKOT) Decree 'On the Organisation of Military Duty of the R-16U (Unified Variant)--putting the R-16U missile into operation' was issued..

1961 April 27 - . 14:16 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. LV Configuration: Juno II AM-19E.
  • Explorer 11 - . Payload: S-15. Mass: 37 kg (81 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar astronomy satellite. Spacecraft: S-15. USAF Sat Cat: 107 . COSPAR: 1961-Nu-1. Apogee: 1,458 km (905 mi). Perigee: 480 km (290 mi). Inclination: 28.8000 deg. Period: 104.50 min. Summary: Gamma ray data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1961 April 27 - . 20:02 GMT - . Launch Site: Wallops Island. LV Family: Javelin. Launch Vehicle: Javelin. LV Configuration: Javelin NASA 8.10GI.
  • Ionosphere mission - . Nation: USA. Agency: NASA. Apogee: 724 km (449 mi).

1962 April 27 - . Launch Site: White Sands. Launch Complex: White Sands LC38. LV Family: Nike Zeus. Launch Vehicle: Nike Zeus. LV Configuration: Nike Zeus-3.
  • Test mission - . Nation: USA. Agency: USA. Apogee: 200 km (120 mi).

1962 April 27 - . 23:24 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg 576B2. LV Family: Atlas. Launch Vehicle: Atlas D. LV Configuration: Atlas D 140D.
  • Demonstration and shakedown operations launch - . Nation: USA. Agency: USAF SAC. Apogee: 1,800 km (1,100 mi).

1963 April 27 - . Launch Site: Vandenberg. Launch Complex: Vandenberg 395-C. LV Family: Titan. Launch Vehicle: Titan 2. LV Configuration: Titan II N-8.
  • Dinner Party - . Nation: USA. Agency: USAF AFSC. Apogee: 1,300 km (800 mi). Summary: Research and development launch. Mk 6 re-entry vehicle..

1963 April 27 - . 02:03 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC11. LV Family: Atlas. Launch Vehicle: Atlas F. LV Configuration: Atlas F 135F.
  • ABRES REX-II re-entry vehicle test flight - . Nation: USA. Agency: USAF AFSC. Apogee: 1,400 km (800 mi).

1964 April 27 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF05. LV Family: Minuteman. Launch Vehicle: Minuteman 1A. LV Configuration: Minuteman 1A 605.
  • Operational missile test - . Nation: USA. Agency: USAF SAC. Apogee: 1,300 km (800 mi).

1964 April 27 - . 23:23 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 395 / Agena D 1604.
  • KH-4A 1005 - . Payload: KH-4A s/n 1005 / Agena D 1604 / OPS 2921. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1964-05-26 . USAF Sat Cat: 796 . COSPAR: 1964-022A. Apogee: 445 km (276 mi). Perigee: 175 km (108 mi). Inclination: 79.9000 deg. Period: 90.80 min. Summary: KH-4A. Mission failed. Recovery vehicle impacted in Venezuela..

1965 April 27 - . 05:00 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC140/18. LV Family: Tsiklon. Launch Vehicle: R-36 8K67.
  • Kura state trials missile launch - . Nation: USSR. Agency: RVSN. Apogee: 870 km (540 mi).

1965 April 27 - . 06:30 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150. LV Configuration: Aerobee 150 NB3.176.
  • X-ray astronomy mission - . Nation: USA. Agency: NRL. Apogee: 193 km (119 mi).

1966 April 27 - . LV Family: Proton. Launch Vehicle: Proton.
  • Soyuz L1 full scale development, LK-1 cancellation approved. - . Nation: USSR. Spacecraft: Soyuz 7K-L1; LK-1. Summary: Decree 10 'On approving the work plan to build the p8loted spacecraft 7K-L1 -- approving the plan for for the UR-500K-L1 and terminating the UR-500K-LK-1' was issued..

1966 April 27 - .
  • L1 Mock-up Inspection - . Nation: USSR. Related Persons: Bushuyev; Gagarin; Komarov. Program: Voskhod; Lunar L1. Flight: Soyuz 7K-L1 mission 1. Spacecraft: Soyuz 7K-L1; Voskhod. The L1 inspection has not gone well. The cosmonauts find that the spacecraft has the same safety problems as Voskhod: no spacesuits, no reserve parachute for the spacecraft, no signal sent when the parachute deploys (the UHF beacon only begins emitting 10 seconds after landing). Supposedly this unsafe and poorly designed spacecraft is supposed to take cosmonauts around the moon by November 1967. Kamanin finds this incredible.

1967 April 27 - .
  • State Commission on Soyuz 1 crash. - . Nation: USSR. Related Persons: Ustinov; Smirnov; Serbin; Afanasyev, Sergei; Gagarin. Program: Soyuz. Flight: Soyuz 1. Spacecraft: Soyuz 7K-OK. Ustinov convened the commission at noon. The work was to be completed by 15 May, and the final report issued by 25 May. The members of the commission would be Ustinov, Smirnov, Serbin, Afanasyev, the Chief Designers, and Gagarin. 22 members would work in seven subcommittees that would:
    • Investigate design and test of the spacecraft structures
    • Investigate design and test of the landing and parachute systems
    • Investigate design and test of the orientation and guidance systems
    • Study the performance of the tracking, communications, and flight ground control systems
    • Investigate design and test of the launch system
    • Analyse the contents of the Mir-3 flight data recorder, telemetry, and space-to-earth communications
    • Review the design and as-built documentation for the spacecraft, subsystems, training program, flight plan, and the on-board flight log

1967 April 27 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 600. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3P-510.
  • Operational test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1967 April 27 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF07. LV Family: Minuteman. Launch Vehicle: Minuteman 1B. LV Configuration: Minuteman 1B 1193.
  • Follow-on operational missile test - . Nation: USA. Agency: USAF SAC. Apogee: 1,300 km (800 mi).

1967 April 27 - . 04:10 GMT - . Launch Site: Fort Churchill. LV Family: Black Brant. Launch Vehicle: Black Brant 5B. LV Configuration: Black Brant VB AFF-VB-07.
  • Test / ionosphere / plasma mission - . Nation: Canada. Agency: NRCC. Apogee: 398 km (247 mi).

1967 April 27 - . 04:31 GMT - . Launch Site: Woomera. Launch Complex: Woomera LA2. Launch Pad: LA2 SL. LV Family: Skylark. Launch Vehicle: Skylark 3 AC. LV Configuration: Skylark 3 AC SL682.
  • Test mission - . Nation: Australia. Agency: WRE; RAE. Apogee: 203 km (126 mi).

1967 April 27 - . 12:50 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC41/1. LV Family: R-7. Launch Vehicle: Vostok 8A92M.
  • Cosmos 156 - . Payload: Meteor no. 7. Mass: 4,730 kg (10,420 lb). Nation: USSR. Agency: MOM. Class: Earth. Type: Weather satellite. Spacecraft: Meteor. Decay Date: 1989-10-23 . USAF Sat Cat: 2762 . COSPAR: 1967-039A. Apogee: 375 km (233 mi). Perigee: 368 km (228 mi). Inclination: 81.1000 deg. Period: 92.00 min. Summary: Worked with Cosmos 144. Investigation of the upper atmosphere and outer space. .

1968 April 27 - .
  • Delays in Apollo CSM and LM delivery dates - . Nation: USA. Related Persons: Low, George. Program: Apollo. Flight: Apollo 9. Spacecraft: Apollo CSM; CSM Block II. ASPO Manager George M. Low explained to the Apollo Program Director the underlying causes of slips in CSM and LM delivery dates since establishment of contract dates during the fall of 1967. The general excuse, Low said, was that slips were the result of NASA-directed hardware changes. "This excuse is not valid." He recounted how NASA-imposed changes had been under strict control and only essential changes had been approved by the MSC Level II Configuration Control Board (CCB). Additional Details: Delays in Apollo CSM and LM delivery dates.

1968 April 27 - .
  • Kamanin proposes organising the cosmonauts into two detachments. - . Nation: USSR. Related Persons: Leonov; Titov; Popovich; Matinchenko; Belyayev. Nikolayev is to be commander of the first group, with Leonov as his deputy. Titov would command the second group, with Popovich as his deputy. But Kamanin doesn't consider any of them to be command officer material yet. The automobile accidents of Popovich, the mess that led to Matinchenko's dismissal, the bad performance of Belyayev in his duties as chief of staff of the VVS group at Baikonur - none of these men have any discipline!

1968 April 27 - . LV Family: Saturn V. Launch Vehicle: Saturn V.
  • Preparation of third Saturn V for an Apollo manned mission - . Nation: USA. Program: Apollo. Summary: NASA Administrator James E. Webb approved plans to proceed with preparation of the third Saturn V space vehicle for a manned mission in the fourth quarter of 1968. . Additional Details: Preparation of third Saturn V for an Apollo manned mission.

1968 April 27 - . Launch Site: Vandenberg. Launch Complex: Vandenberg 576A3. LV Family: Atlas. Launch Vehicle: Atlas/Trident E. LV Configuration: Atlas E/Trident 78E.
  • RMP-B-7 re-entry vehicle test flight - . Nation: USA. Agency: USAF AFSC. Apogee: 1,600 km (900 mi).

1968 April 27 - . 05:19 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3A. LV Family: Scout. Launch Vehicle: Scout X-5. LV Configuration: Scout X-5C S164C.
  • Reentry 5 re-entry vehicle test flight - . Nation: USA. Agency: NASA. Apogee: 175 km (108 mi).

1968 April 27 - . 15:05 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150. LV Configuration: Aerobee 150 NASA 04.244DS.
  • NRL ND3.212 Solar ultraviolet mission - . Nation: USA. Agency: NASA. Apogee: 166 km (103 mi).

1969 April 27 - . LV Family: Titan. Launch Vehicle: Titan 3M.
  • First static test firing of Titan 3M SRB. - . Nation: USA. Spacecraft: MOL. Summary: First test firing of seven segment solid rocket booster motor for Titan 3M for MOL. The test at Coyote Canyon, California, generated 0.7 million kgf for two minutes..

1969 April 27 - . 03:22 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150. LV Configuration: Aerobee 150 NASA 04.278UG.
  • Astronomy mission - . Nation: USA. Agency: NASA. Apogee: 158 km (98 mi).

1970 April 27 - .
  • Soyuz 9 book. - . Nation: USSR. Related Persons: Titov. Program: Soyuz. Flight: Soyuz 9. Summary: Kamanin works at his dacha on his proposed book on Soyuz 9 (to be ghost-written by Mikahil Debrov). Debrov will be in Japan in May, while Kamanin must go to Tyuratam for the Soyuz 9 mission. Titov is trying to get his flight ban lifted..

1970 April 27 - .
1970 April 27 - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. LV Family: R-5. Launch Vehicle: R-5V.
  • RAO Solar mission - . Nation: USSR. Agency: AN. Apogee: 500 km (310 mi).

1970 April 27 - . Launch Site: Baikonur. Launch Complex: Baikonur LC142/34. LV Family: Tsiklon. Launch Vehicle: R-36 8K67P.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1971 April 27 - . LV Family: Shuttle. Launch Vehicle: Shuttle.
  • James C Fletcher sworn in as NASA Administrator - . Nation: USA. Related Persons: Low, George; Fletcher; Nixon; Paine. Program: Apollo. James C. Fletcher was sworn in as NASA Administrator at a White House ceremony. Fletcher decided to push for Congressional approval of the stalled space shuttle program, but found that would only be forthcoming if the US Air Force agreed to participate. In order for that to happen, NASA would have to incorporate the USAF requirements for the shuttle that it had so far ignored (greater payload, higher cross-range). In another attempt to share the cost of the shuttle with other nations, previous NASA Administrator Thomas Paine had already tried to obtain international partners. But the only remnants of that effort were the Canadian robotic arm for the shuttle, and the European Space Agency Spacelab module. Neither represented a significant amount of the total program cost.

    President Nixon had nominated Fletcher for the position on March 1, and the Senate had confirmed the nomination on March 11. George M. Low, NASA Deputy Administrator, had been Acting Administrator since the resignation of Paine on September 15, 1970.


1972 April 27 - .
  • Landing of Apollo 16 - . Return Crew: Duke; Mattingly; Young. Nation: USA. Related Persons: Duke; Mattingly; Young. Program: Apollo. Flight: Apollo 16. Entry and landing were normal, completing a 265-hour 51-minute mission. The command module was viewed on television while dropping on the drogue parachutes, and continuous coverage was provided through crew recovery. Splashdown was at 2:45 p.m. EST (19:45 GMT) in mid-Pacific, 5 kilometers from the recovery ship U.S.S. Ticonderoga. All primary mission objectives had been achieved.

1972 April 27 - .
  • Splashdown of Apollo 16 - . Nation: USA. Flight: Apollo 16. Entry and landing were normal, completing a 265-hour 51-minute mission. The command module was viewed on television while dropping on the drogue parachutes, and continuous coverage was provided through crew recovery. Splashdown was at 19:44 GMT in mid-Pacific, 5 kilometers from the recovery ship U.S.S. Ticonderoga. Additional Details: Splashdown of Apollo 16.

1973 April 27 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF25. LV Family: Minuteman. Launch Vehicle: Minuteman 3.
  • OT GT21GB operational test launch - . Nation: USA. Agency: USAF SAC. Apogee: 1,300 km (800 mi).

1973 April 27 - . 04:50 GMT - . Launch Site: Green River. LV Family: Athena RTV. Launch Vehicle: Athena H. LV Configuration: Athena H H010.
  • RVTO-3B-4 re-entry vehicle test flight - . Nation: USA. Agency: USAF. Apogee: 200 km (120 mi).

1973 April 27 - . 04:53 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150. LV Configuration: Aerobee 150 CRL A03.911-1.
  • Ultraviolet Absorption Aeronomy mission - . Nation: USA. Agency: AFCRL. Apogee: 121 km (75 mi).

1974 April 27 - . Launch Site: Baikonur. Launch Complex: Baikonur LC105. LV Family: R-36M. Launch Vehicle: R-36M. FAILURE: Failure.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 0 km ( mi).

1974 April 27 - . Launch Site: Baikonur. Launch Complex: Baikonur LC177. LV Family: MR-UR-100. Launch Vehicle: MR-UR-100.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1974 April 27 - . 08:10 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF03. LV Family: Minuteman. Launch Vehicle: Minuteman 1B.
  • SSTTP M2-35 Target mission - . Nation: USA. Agency: USAF AFSC. Apogee: 1,300 km (800 mi).

1976 April 27 - . 21:00 GMT - . Launch Site: Molodezhnaya. LV Family: M-100. Launch Vehicle: M-100.
  • - . Nation: USSR. Apogee: 91 km (56 mi).

1977 April 27 - . LV Family: Shuttle. Launch Vehicle: Shuttle.
  • Shuttle SSME Tests resumed - . Nation: USA. Summary: 25 tests will be run on two engines over the next year..

1977 April 27 - . 03:30 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar LC107/1. LV Family: Kosmos 3. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M 53731-287.
  • Cosmos 906 - . Mass: 550 kg (1,210 lb). Nation: USSR. Agency: MO. Class: Military. Type: Radar calibration target. Spacecraft: Taifun-2. Decay Date: 1980-03-23 . USAF Sat Cat: 9938 . COSPAR: 1977-031A. Apogee: 515 km (320 mi). Perigee: 464 km (288 mi). Inclination: 50.6000 deg. Period: 94.40 min. Summary: Released 1 Romb radar calibration subsatellite. Possible partially failed spacecraft bus..

1978 April 27 - . Launch Site: Baikonur. Launch Complex: Baikonur LC170. LV Family: MR-UR-100. Launch Vehicle: MR-UR-100U 15A16. FAILURE: Failure.
  • Joint flight trials launch - . Nation: USSR. Agency: RVSN. Apogee: 0 km ( mi).

1979 April 27 - . 17:15 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC43/3. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Cosmos 1097 - . Payload: Yantar-4K1 s/n 1. Mass: 6,600 kg (14,500 lb). Nation: USSR. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: Yantar-4K1. Duration: 30.00 days. Decay Date: 1979-05-27 . USAF Sat Cat: 11348 . COSPAR: 1979-037A. Apogee: 331 km (205 mi). Perigee: 173 km (107 mi). Inclination: 62.8000 deg. Period: 89.50 min. Summary: First flight test of Yantar-4K1 satellite. Returned as planned after 30 days. High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission..

1980 April 27 - . 06:24 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Progress 9 - . Payload: Progress s/n 109. Mass: 7,014 kg (15,463 lb). Nation: USSR. Agency: MOM. Program: Salyut 6. Class: Manned. Type: Manned logistics spacecraft. Flight: Salyut 6 EO-4. Spacecraft: Progress. Duration: 24.76 days. Completed Operations Date: 1980-05-22 00:44:00 . Decay Date: 1980-05-22 00:44:00 . USAF Sat Cat: 11784 . COSPAR: 1980-033A. Apogee: 255 km (158 mi). Perigee: 185 km (114 mi). Inclination: 51.7000 deg. Period: 88.80 min. Unmanned supply vessel for Salyut 6. Delivery of various cargoes to the Salyut-6 orbital station. Docked with Salyut 6 on 29 Apr 1980 08:09:19 GMT. Undocked on 20 May 1980 18:51:00 GMT. Destroyed in reentry on 22 May 1980 00:44:00 GMT. Total free-flight time 3.32 days. Total docked time 21.45 days.

1981 April 27 - . 23:15 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC36. Launch Vehicle: Aries. LV Configuration: Aries NASA 24.10UG.
  • JHU Aries-UVT Ultraviolet astronomy mission - . Nation: USA. Agency: NASA. Apogee: 263 km (163 mi).

1982 April 27 - . 20:00 GMT - . Launch Site: Kheysa. LV Family: M-100. Launch Vehicle: M-100.
  • - . Nation: USSR. Apogee: 85 km (52 mi).

1983 April 27 - . 14:00 GMT - . Launch Site: Thumba. LV Family: M-100. Launch Vehicle: M-100.
  • - . Nation: USSR. Apogee: 83 km (51 mi).

1984 April 27 - . 19:02 GMT - . Launch Site: Point Mugu. Launch Vehicle: Rocketsonde.
  • Arcasonde - . Nation: USA. Agency: MRN. Apogee: 68 km (42 mi).

1985 April 27 - . 04:15 GMT - . Launch Site: Kiruna. Launch Complex: Kiruna S. LV Family: Skylark. Launch Vehicle: Skylark 7. LV Configuration: Skylark 7 DLR K-GR-138.
  • TEXUS 11 Microgravity mission - . Nation: Germany. Agency: DFVLR. Apogee: 266 km (165 mi).

1986 April 27 - . 09:00 GMT - . Launch Site: Sea-launched. Launch Pad: UNKO. Launch Platform: SHIR. LV Family: M-100. Launch Vehicle: M-100B.
  • - . Nation: USSR. Apogee: 79 km (49 mi).

1987 April 27 - . 00:00 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC32. Launch Pad: LC32/pad?. LV Family: Tsiklon. Launch Vehicle: Tsiklon-3.
  • Cosmos 1842 - . Payload: Tselina-D no. 61. Mass: 1,600 kg (3,500 lb). Nation: USSR. Agency: MO. Program: Tselina. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: Tselina-D. USAF Sat Cat: 17911 . COSPAR: 1987-038A. Apogee: 628 km (390 mi). Perigee: 602 km (374 mi). Inclination: 82.5000 deg. Period: 97.00 min.

1988 April 27 - . 09:10 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. Launch Pad: LC1 or LC31. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Cosmos 1941 - . Mass: 6,300 kg (13,800 lb). Nation: USSR. Agency: MOM. Class: Earth. Type: Earth resources satellite. Spacecraft: Zenit-8. Duration: 14.00 days. Decay Date: 1988-05-11 . USAF Sat Cat: 19079 . COSPAR: 1988-035A. Apogee: 266 km (165 mi). Perigee: 205 km (127 mi). Inclination: 70.3000 deg. Period: 89.20 min. Summary: Military cartographic satellite; returned film capsule..

1989 April 27 - . 13:40 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. LV Family: M-100. Launch Vehicle: M-100B.
  • - . Nation: USSR. Apogee: 86 km (53 mi).

1989 April 27 - .
1990 April 27 - . Launch Site: White Sands. Launch Complex: White Sands LC36. Launch Vehicle: Aries. LV Configuration: Aries GL A24.570.
  • EXCEDE-3 Active plasma mission - . Nation: USA. Agency: SDIO. Apogee: 116 km (72 mi).

1993 April 27 - . 10:35 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC31. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Cosmos 2243 - . Payload: Yantar-1KFT no. 16. Mass: 6,600 kg (14,500 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Cartographic satellite. Spacecraft: Yantar-1KFT. Duration: 9.00 days. Decay Date: 1993-05-06 . USAF Sat Cat: 22641 . COSPAR: 1993-028A. Apogee: 233 km (144 mi). Perigee: 189 km (117 mi). Inclination: 70.4000 deg. Period: 88.70 min. Summary: Topographic mapping for the Army General Staff. Mission normally would have run 44 days..

1994 April 27 - . 02:10 GMT - . Launch Site: Ryori. LV Family: MT-135. Launch Vehicle: MT-135P. LV Configuration: MT-135P-R888.
  • Meteorological mission - . Nation: Japan. Agency: JMA. Apogee: 60 km (37 mi).

1999 April 27 - . 18:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC6. LV Family: Athena. Launch Vehicle: Athena-2. LV Configuration: Athena-2 LM-005. FAILURE: Payload shroud failed to separate four minutes after launch.. Failed Stage: S.
  • Ikonos 1 - . Nation: USA. Agency: Martin. Class: Surveillance. Type: Civilian surveillance satellite. Spacecraft: Ikonos. COSPAR: F990427A. Tracking stations downrange did not pick up the spacecraft. It was later determined that the rocket nose fairing failed to separate four minutes after launch. The extra mass caused the vehicle to reenter over the South Pacific on the first partial orbit. Space Imaging's Ikonos 1 was to have been the first commercial imaging satellite with a high a resolution camera.

2000 April 27 - .
  • ISS Status Report: ISS 00-17 - . Nation: USA. Program: ISS. International Space Station (ISS) flight controllers have resumed routine operations watching over systems and cycling onboard batteries, while awaiting word on the next available launch opportunity for Space Shuttle Atlantis. That decision is expected late today or early tomorrow. Additional Details: ISS Status Report: ISS 00-17.

2001 April 27 - .
  • STS-100 Mission Status Report #18 - . Nation: USA. Related Persons: Guidoni; Hadfield; Helms; Parazynski; Voss. Program: ISS. Flight: ISS EO-2; STS-100. The Italian Space Agency-provided Raffaello logistics module, loaded with 1,600 pounds of material to be returned to Earth, was tucked securely in Endeavour's payload bay at 3:58 p.m. Central time today as the International Space Station and shuttle flew high over the Pacific Ocean, north of Indonesia. Additional Details: STS-100 Mission Status Report #18.

2002 April 27 - .
2007 April 27 - .
2008 April 27 - .
2010 April 27 - . 01:05 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC132/1. LV Family: Kosmos 3. Launch Vehicle: Kosmos 11K65M.
  • Cosmos 2463 - . Nation: Russia. Agency: KVR. Class: Navigation. Type: Navigation satellite. Spacecraft: Parus. USAF Sat Cat: 36519 . COSPAR: 2010-017A. Apogee: 1,023 km (635 mi). Perigee: 967 km (600 mi). Inclination: 83.0000 deg. Period: 105.00 min.

2011 April 27 - . Launch Site: Barents Sea Launch Area. Launch Platform: K-84. LV Family: R-29. Launch Vehicle: Sineva.
  • 4 x RV - . Nation: Russia. Apogee: 1,000 km (600 mi). Summary: Operational test.
  • NASA 36.278GT - . Nation: USA. Apogee: 339 km (210 mi). Summary: Operational test.

2011 April 27 - . 13:05 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Progress M-10M - . Nation: Russia. Program: ISS. Class: Manned. Type: Manned logistics spacecraft. Flight: ISS EO-27; ISS EO-26. Spacecraft: Progress M. Decay Date: 2011-10-29 . USAF Sat Cat: 37396 . COSPAR: 2011-017A. Apogee: 347 km (215 mi). Perigee: 343 km (213 mi). Inclination: 51.6000 deg. Period: 91.40 min. Summary: Docked with the ISS Pirs module at 14:28 GMT on 29 April..

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