STS-61 was the first Hubble Space Telescope (HST) servicing mission. The HST had been launched in 1990 with a flawed main mirror.
A camera on board the Space Shuttle Endeavour filmed an unknown object during an EVA (Extra Vehicular Activity) or spacewalk by astronaut Story Musgrave.
This UFO report comes from the late Jeff Challender’s Project P.R.O.V.E. website:
http://keyholepublishing.com/projectprove/Arts/061Wk/061Wk.html
The NASA STS-61 Space Shuttle Endeavour mission:
Launch date: 2 December 1993 -
Landing date: 13 December 1993.
Franklin Story Musgrave,
U.S. Medical Doctor &
NASA Astronaut
(iss.jaxa.jp photo)