🛰️ SATELLITE · HISTORICAL RECORD
STEP M0
Retired 2009STEP M0 (NORAD 23030, COSPAR 1994-017A) is a retired US satellite, withdrawn from service around 1 Jan 2009, launched on 13 Mar 1994 on the P90-5 mission. It is catalogued as STP P90-5. It was operated by USAF SMC as part of the NRO Sig Tech programme. The spacecraft was built by TRWC/CTA on the LEOStar T-200 bus, with a mass of 502 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
1994
launched
2009
retired
32
years on orbit
502
kg mass
Lifecycle
Launched13 Mar 1994 · on the P90-5 mission
Operational13 Mar 1995 · entered service
Retired1 Jan 2009 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID23030
COSPAR1994-017A
TypeSatellite
OperatorUSAF SMC
Country / StateUS
ManufacturerTRWC/CTA
BusLEOStar T-200
Mass502 kg (200 kg dry)
ProgrammeNRO Sig Tech
CategoryTECH
OrbitLEO (LLEO/R)
Altitude554 × 566 km
Inclination105.0°
Frequently asked questions
What happened to STEP M0?
STEP M0 was retired from service around 1 Jan 2009 after launching in 1994. It is no longer operational but remains catalogued.
How long was STEP M0 operational?
STEP M0 was operational for roughly 14 years, from 13 Mar 1995 to 1 Jan 2009.
Who operated and built STEP M0?
STEP M0 was operated by USAF SMC and built by TRWC/CTA (US).
Launched together
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-10-23.