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This is a list (incomplete) of alleged sightings of unidentified flying objects or UFOs in outer space.

1991

STS-48 incident

• Video taken during mission STS-48 of Space Shuttle Discovery while in orbit on September 15, 1991 shows a flash of light and several objects that appear to be flying in an artificial or controlled fashion. NASA explained the objects as ice particles reacting to engine jets. Philip C. Plait discussed the issue in his book Bad Astronomy, agreeing with NASA. Dr. Jack Kasher analyzed the movement of the objects in 1996, and found five proofs that the footage could not depict ice particles. However, Lan Fleming found discrepancies in the timestamps in a later version of the video first released by the NASA FOIA office in 1999, leaving some conclusions indeterminate. Lan Fleming also analyzed the flash of light that preceded the abrupt change in the course of the objects, and concluded that the exhaust plume from one of the shuttle's reaction control system rockets could not have produced the flash of light. Mark Carlotto came to the conclusion that relatively brief firings of shuttle thruster rockets acting on nearby debris particles could not explain the prolonged periods of acceleration indicated by the curved paths of the unidentified objects. Mark Carlotto also noted that at the end of the event, the shuttle's camera panned down, showing a number of objects moving below the shuttle, and one of the objects appeared to consist of three lobes arranged in a triangular pattern.

2001

STS-102 The Washington Sequence

• Video broadcast during mission STS-102 of Space Shuttle Discovery while in orbit allegedly recorded on March 19, 2001 by Jeff Challender shows a flash of light and three objects which performed movements which included starting, stopping, accelerating, and making sudden angled turns. Lan Fleming compared the timing of the flash of light and a course change of one of the objects to the timing of shuttle thruster firings and concluded that the flash and the movement of the object could not have been caused by thruster firings.

References

1. Plait, Philip C. (2002). Bad Astronomy. John Wiley & Sons. ISBN 0-471-40976-6. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
2. Kasher, Jack (1995–96). "Anomalous images on videotape from Space Shutle Flight STS-48: Examination of the ice-particle explanation". Journal of UFO Studies (JUFOS). vol. 6. Center for UFO Studies (CUFOS). {{cite journal}}: |volume= has extra text (help)CS1 maint: date format (link)
3. Fleming, Lan (October 18, 2003). "Losing the Signal: Proof That Time Stamps on the STS-48 Video Released by NASA Are Phony". VGL.
4. Fleming, Lan (c. 2003). "Analysis of the Light Flash in the STS-48 Video" (PDF). VGL.
5. ^ Fleming, Lan (c. 2009). "Space Shuttle Thrusters, Light Flashes, and Ice Particles: Some Insights from an Expert". VGL.
6. "Examination of Object Trajectories in the STS-48 "UFO" Video". VGL.
7. Carlotto, Mark J. (1995). "Digital Video Analysis of Anomalous Space Objects" (PDF). Journal of Scientific Exploration. 9 (1): 45–63.
8. Carlotto, Mark J. (1995). "Digital Video Analysis of Anomalous Space Objects" (PDF). Journal of Scientific Exploration. 9 (1): 62.
9. Evans, Will (January 2003). "Jeff Challender Tracked NASA Flights". The Sacramento Bee. Mutual UFO Network of Indiana (MUFON).
10. Challender, Jeff (2005). "STS-102, The Washington Sequence, Part One". Project P.R.O.V.E. keyhole publishing company. {{cite web}}: Italic or bold markup not allowed in: |work= (help)
11. Challender, Jeff (2005). "STS-102, The Washington Sequence, Part Two". Project P.R.O.V.E. keyhole publishing company. {{cite web}}: Italic or bold markup not allowed in: |work= (help)
12. Fleming, Lan (2005). "Comparison of the Timing of a Course Change Made by an Object in a STS-102 Video with Orbiter Thruster Firings". VGL.

External links

• VGL
• The J. Allen Hynek Center for UFO Studies (CUFOS)
• New Frontiers in Science (NFS) online journal