CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0506
LOSAT X
LOSAT X (NORAD 21553) re-entered Earth’s atmosphere on 15 November 1991, after 4 months in orbit.
Official date
NORAD number
21553
International designator
1991-047B
Object type
Spacecraft
Country
United States
Launched
4 Jul 1991Cape Canaveral
Re-entered (UTC)
15 Nov 1991UTC calendar day
Time in orbit
4 months134 days
How it ended
Re-entered (natural decay)
Latitude range
39.9°N to 39.9°SFinal inclination 39.9°
Mass
75 kg
Operator
SDIO
Built by
Ball
Bus
Quickstar
Programme
SDIO SS
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 39.9°, allowed a re-entry anywhere between 39.9°N and 39.9°S.
Life in orbit
4 monthsLOSAT X’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 15 Nov 1991
1 entryFrom the same launch
1991-047
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0506
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0506
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.