CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1973-0321
OPS 2093
OPS 2093 (NORAD 6640) came down while still attached to its host on 13 June 1973, after 28 days in orbit.
Official date
NORAD number
6640
International designator
1973-028A
Object type
Spacecraft
Country
United States
Launched
16 May 1973Vandenberg
Re-entered (UTC)
13 Jun 1973UTC calendar day
Time in orbit
28 days28 days
How it ended
Came down attached to its host
Latitude range
69.5°N to 69.5°SFinal inclination 110.5°
Mass
2,400 kg
Operator
NRO / SAFSP
Built by
LMSC
Bus
KH-8
Programme
KH8D
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 110.5°, allowed a re-entry anywhere between 69.5°N and 69.5°S.
Life in orbit
28 daysOPS 2093’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 13 Jun 1973
3 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0321
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1973-0321
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.