Sodium cloud, ionization research. Launched at 1005 local time. Reached 106.2 km.

Tests were in progress at Langley in which an aluminium honeycomb structure was used partially to absorb the spacecraft impact load. Robert R. Gilruth, Project Mercury Director, had stated his belief of this requirement on January 16, 1959.

A deliberate thrust misalignment of 1 inch was programed into the escape combination. Lift-off was effected cleanly, and a slow pitch started during the burning of the escape rocket motor. The tower separated as scheduled and the drogue and main parachutes deployed as planned. The test was fully successful.

First production model of McDonnell-built Mercury capsule was delivered to NASA.

President John F. Kennedy, in his regular press conference, stated that "no one is more tired than I am" of seeing the United States second to Russia in space. "They secured large boosters which have led to their being first in Sputnik, and led to their first putting their man in space. We are, I hope, going to be able to carry out our efforts, with due regard to the problem of the life of the men involved, this year. But we are behind . . . the news will be worse before it is better, and it will be some time before we catch up. . . ."

First manned spaceflight, one orbit of the earth. Three press releases were prepared, one for success, two for failures. It was only known ten minutes after burnout, 25 minutes after launch, if a stable orbit had been achieved.

The payload included life-support equipment and radio and television to relay information on the condition of the pilot. The flight was automated; Gagarin's controls were locked to prevent him from taking control of the ship. The combination to unlock the controls was available in a sealed envelope in case it became necessary to take control in an emergency. After retrofire, the service module remained attached to the Sharik reentry sphere by a wire bundle. The joined craft went through wild gyrations at the beginning of re-entry, before the wires burned through. The Sharik, as it was designed to do, then naturally reached aerodynamic equilibrium with the heat shield positioned correctly.

Gagarin ejected after re-entry and descended under his own parachute, as was planned. However for many years the Soviet Union denied this, because the flight would not have been recognized for various FAI world records unless the pilot had accompanied his craft to a landing. Recovered April 12, 1961 8:05 GMT. Landed Southwest of Engels Smelovka, Saratov. - Additional details.

First Soviet public announcement of manned lunar goals.

ASAT interceptor control and propulsion test. Elaboration of systems providing for the extensive manouevring of space apparatuses.

Launched at 1965 Croatan MRF Expedition LP38 - - Latitude: 58.32 S - Longitude: 78.00 W.

The cosmonauts began work at 10:30 in the morning, and didn't complete work until 23:30 at night. They spent 16 hours working on Cosmonaut's Day, due to the criminally chaotic performance of TsKBEM. The cosmonauts have to train simultaneously for the Soyuz and L1 missions. Kamanin warns Kerimov about the unacceptable situation. Grechko arrives to head the state commission. The launch of Soyuz 1 is set for 24-25 April - there will be only eight days to fix all of the problems. The energy and optimism of Korolev is sorely missed. Mishin was a poor deputy, and a worse leader - his constant mistakes and stupidity delay work and aggravate people. The cosmonauts have to keep in shape by playing tennis, but there is only one court at Tyuratam - a second court is to be built eventually (!)

Follow-on operational missile test

High resolution photo reconnaissance satellite; returned film capsule

More than 1,000 people gather at Area 2 of Baikonur to commemorate the day. Kamanin muses that of the dozens of cosmonauts present, only one - Feoktistov - was there on the day the first man went into space. Now there were men on the moon, and the first space station was being prepared for flight. Kamanin believes the crew can survive a thirty-day flight, now that Shatalov has replaced Shonin on the crew.

Development of systems for air defence and the control of outer space.

High resolution photo reconnaissance mission.

Uncertain if Molniya-1T model was Molniya-1 or Molniya-1T. Operation of the long-range telephone and telegraph radiocommunications system in the USSR; transmission of television programmes to stations in the Orbita network.

Soyuz 33 landed at 16:35 GMT.

Replaced Cosmos 1109. Covered Oko constellation plane 9 - 240 degree longitude of ascending node.

First flight of Space Transportation System (aka Space Shuttle).. Payloads: Development Flight Instrumentation and Aerodynamic Coefficient Identification Package.

Replaced Cosmos 1371.

It was clear that the planned processing flow could not be followed and still make the spring 1986 launch date. The decision was taken on Cosmonautics Day to ship the flight model to Baikonur and conduct the systems testing and integration there.

Manned seven crew. Payloads: Telesat (Canada communications satellite)-I with Payload Assist Module (PAM)-D deployment, Syncom IV-3 communications satellite deploy-ment with its unique stage (unique stage failed to ignite), Continuous Flow Electrophoresis (CFES), Phase Partitioning Experiment (PPE), student experiments, two getaway specials (GAS) Informal science studies (Toys in Space).

Released by STS 51D 4/13/85; 107.5 deg W. Telecommunications. Operating entity TELESAT Canada. Longitude 107.5 W. Transmit power 11.2 W on each frequency. Frequencies 11730, 11743, 11791, 11804, 11852, 11865, 11913, 11926, 11974, 11987, 12035, 12048, 12096, 12109, 12157, 121 70 MHz. Positioned in geosynchronous orbit at 107 deg W in 1985-1991; 109 deg W in 1991-1993; 72 deg W in 1993-1997; 118 deg W in 1997-1998; 106 deg W in 1998-1999 As of 5 September 2001 located at 63.20 deg W drifting at 0.009 deg W per day. As of 2007 Mar 2 located at 112.29E drifting at 2.201W degrees per day.

Released by STS 51D 4/13/85; failed to orbit and subsequently repaired by STS 51-I on 8/31/85; 178 deg E; leased by U.S. government. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit at 175 deg W in 1985-1987; 105 deg W in 1987-1996 As of 31 August 2001 located at 106.85 deg E drifting at 11.920 deg W per day. As of 2007 Mar 10 located at 158.41W drifting at 11.917W degrees per day.

It managed to dock to Mir on the third attempt after the crew removed a trash bag from the docking collar in a space walk. The FGB tug, its work done, then backed away from the station. But the manoeuvres had cut into its already-reduced propellant supply. Unable to deorbit itself to a controlled burn-up in the atmosphere, the FGB was instead commanded to boost itself into a storage orbit 40 km above Mir.

A Guangzhou newspaper said that the first Chinese astronaut would fly by 2001. It also mentioned lunar and space station plans. This was the one of a series of reports about Chinese space plans of the period.

Communications satellite is for the European Telecommunications Satellite Organization. The vehicle entered a 153 km x 385 km x 27.4 deg parking orbit nine minutes after launch. The second Centaur stage burn delivered the satellite to a 166 km x 46,076 km x 19.7 deg super-synchronous transfer orbit. The satellite was stationed at 7 deg E and carried 24 Ku-band transponders with a wide beam covering Europe, North Africa and Asia, and a spot beam for digital TV to Turkey. Positioned in geosynchronous orbit at 7 deg E in 1999. As of 26 August 2001 located at 7.01 deg E drifting at 0.004 deg W per day. As of 2007 Mar 7 located at 21.59E drifting at 0.003E degrees per day.

Delayed from May 28, 2002, and January 13, February 5, and April 11, 2003. AsiaSat 4 was designed to provide broadcast, telecommunications and broadband multimedia services to the Asia Pacific region, and direct-to-home broadcast servic-es to Hong Kong, from its orbital position of 122 deg É East longitude.The satellite generated up to 9,600 watts using two sun-tracking four-panel solar wings covered with triple-junction gallium arsenide solar cells. AsiaSat 4 was to operate in C-band and Ku-band. The satellite carried 28 active transponders with six spares in C-band, powered by 55-watt traveling-wave tube amplifiers (TWTAs), and 20 active transponders with four spares in Ku-band, powered by 140-watt TWTAs. The C-band payload was designed to offer pan-Asian coverage, similar to AsiaSat 3S, also a 601HP model. The Ku-band payload provided high power, and spot beams for selected areas in either the Fixed Satellite Service frequency band or in the Broadcast Satellite Service frequency band. As of 2007 Mar 10 located at 122.23E drifting at 0.011W degrees per day.

Delayed from November, December 4, 2004. Ku and C band transponders. As of 2007 Mar 11 located at 133.99E drifting at 0.013W degrees per day.

As of 2007 Mar 8 located at 132.01E drifting at 0.014W degrees per day.

The fifth Beidou satellite, but the first in the 12-hour, 55 deg inclination MEO portion of the constellation. All previous launches had been to populate the geostationary portion of the system.