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STS-61-A (also known as Spacelab D-1) was the 22nd mission of NASA's Space Shuttle program. It was a scientific Spacelab mission, funded and directed by West Germany – hence the non-NASA designation of D-1 (for Deutschland-1). STS-61-A was the ninth and last successful flight of Space Shuttle Challenger before the disaster.
With its very heavy workload, the STS-61 mission was one of the most complex in the Shuttle's history. STS-61 lasted almost 11 days, and crew members made five spacewalks (extravehicular activities (EVAs)), an all-time record; even the re-positioning of Intelsat VI on STS-49 in May 1992 required only four. The flight plan allowed for two ...
The mission lasted a total of 6 days, 2 hours, 3 minutes, and 51 seconds. STS-61-C was the last successful Space Shuttle flight before the Challenger disaster, which occurred on January 28, 1986, only 10 days after Columbia ' s return. Accordingly, commander Gibson later called the STS-61-C mission "The End of Innocence" for the Shuttle Program ...
The main objective of STS-61-F was to deploy the Ulysses solar probe, which would travel to Jupiter and use it as a gravitational slingshot in order to be placed into polar orbit around the Sun. This mission would have marked the first use of the Centaur-G liquid-fueled payload booster, which would also be used on the subsequent mission to send ...
STS-61-M was a proposed NASA Space Shuttle program mission, planned for July 1986 but canceled following the Space Shuttle Challenger disaster . Payload was to have been TDRS-D of the U.S. tracking and data relay satellite (TDRS) satellites.
It was later re-manifested on STS-51-E; however, this too was cancelled due to concerns over the reliability of the IUS. It was eventually assigned to STS-51-L, which was also to carry the SPARTAN-Halley astronomy satellite. [3] STS-51-L launched with TDRS-B at 16:38:00 UTC on 28 January 1986. [4]
NASA flew a number of Space Shuttle missions in the early and mid-1980s with designations derived from STS-61. The ambiguity was the result of a NASA decision to change designation of missions starting in Fiscal Year 1984. Previously, missions were designated in the order they were flown (i.e., STS-9 indicated the ninth shuttle mission).
STS-51-D was the 16th flight of NASA's Space Shuttle program, and the fourth flight of Space Shuttle Discovery. [2] The launch of STS-51-D from Kennedy Space Center (KSC), Florida, on April 12, 1985, was delayed by 55 minutes, after a boat strayed into the restricted Solid Rocket Booster (SRB) recovery zone. STS-51-D was the third shuttle ...