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🛰️ SATELLITE · HISTORICAL RECORD

STP P97-1

Re-entered 21 Nov 1999

STP P97-1 (NORAD 25551, COSPAR 1998-069C) was a US satellite that re-entered Earth's atmosphere on 21 Nov 1999, launched on 4 Dec 1998 on the OV-105 ISS mission. It was operated by AFRL as part of the STP1 programme. The spacecraft was built by OSCM on the Minisat-deriv bus, with a mass of 68 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.

1998
launched
1999
re-entered
1
year on orbit
68
kg mass

Lifecycle

Launched4 Dec 1998 · on the OV-105 ISS mission
Operational21 Nov 1999 · entered service
Retired21 Nov 1999 · end of operational service
Re-entered21 Nov 1999 · atmospheric re-entry — object destroyed

Specifications

NORAD ID25551
COSPAR1998-069C
TypeSatellite
OperatorAFRL
Country / StateUS
ManufacturerOSCM
BusMinisat-deriv
Mass68 kg
ProgrammeSTP1
CategoryTECH
OrbitLEO (LLEO/I)
Altitude380 × 391 km
Inclination51.6°

Frequently asked questions

What happened to STP P97-1?

STP P97-1 re-entered Earth's atmosphere on 21 Nov 1999, ending a mission that began with its launch in 1998. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did STP P97-1 re-enter the atmosphere?

STP P97-1 re-entered on 21 Nov 1999, according to Orbital Radar's historical catalogue records.

Who operated and built STP P97-1?

STP P97-1 was operated by AFRL and built by OSCM (US).

Launched together

OV-105Re-entered 1998SAC-ARe-entered 1999ISS Node 1NORAD 25575
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.