CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
2006-0066
STP-R1 (USA 185)
STP-R1 (USA 185) (NORAD 28871) re-entered Earth’s atmosphere on 28 June 2006, after 9 months in orbit.
Official date
NORAD number
28871
International designator
2005-037A
Object type
Spacecraft
Country
United States
Launched
23 Sep 2005Vandenberg
Re-entered (UTC)
28 Jun 2006UTC calendar day
Time in orbit
9 months278 days
How it ended
Re-entered (natural decay)
Latitude range
83.7°N to 83.7°SFinal inclination 96.3°
Mass
417 kg
Operator
USAF STP / DARPA
Built by
GD C4 Systems
Bus
SA-200?
Programme
DARPA Tech
Where it came down
Latitude band its orbit allowedExact position not recorded
No position was recorded for this re-entry. Its final orbit, inclined at 96.3°, allowed a re-entry anywhere between 83.7°N and 83.7°S.
Life in orbit
9 monthsSTP-R1 (USA 185)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 28 Jun 2006
2 entriesFrom the same launch
2005-037
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/2006-0066
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/2006-0066
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.