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🛰️ SATELLITE · HISTORICAL RECORD

OV-104

Re-entered 11 Aug 1991

OV-104 (NORAD 21638, COSPAR 1991-054A) was a US satellite that re-entered Earth's atmosphere on 11 Aug 1991, launched on 2 Aug 1991 on the OV-104 IUS deploy mission. It was operated by JSC as part of the OV-104 programme. The spacecraft was built by RWI on the STS OV bus, with a mass of 91,417 kg. Like most satellites in low orbits, it was gradually slowed by atmospheric drag until re-entry. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.

1991
launched
1991
re-entered
0
years on orbit
91,417
kg mass

Lifecycle

Launched2 Aug 1991 · on the OV-104 IUS deploy mission
Operational11 Aug 1991 · entered service
Retired11 Aug 1991 · end of operational service
Re-entered11 Aug 1991 · atmospheric re-entry — object destroyed

Specifications

NORAD ID21638
COSPAR1991-054A
TypeSatellite
OperatorJSC
Country / StateUS
ManufacturerRWI
BusSTS OV
Mass91,417 kg (84,930 kg dry)
ProgrammeOV-104
CategorySS
OrbitLEO (LLEO/I)
Altitude299 × 331 km
Inclination28.5°

Frequently asked questions

What happened to OV-104?

OV-104 re-entered Earth's atmosphere on 11 Aug 1991, ending a mission that began with its launch in 1991. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did OV-104 re-enter the atmosphere?

OV-104 re-entered on 11 Aug 1991, according to Orbital Radar's historical catalogue records.

Who operated and built OV-104?

OV-104 was operated by JSC and built by RWI (US).

Launched together

TDRS-ENORAD 21639
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.