🛰️ SATELLITE · HISTORICAL RECORD
INTRUDER 4
Retired 2013INTRUDER 4 (NORAD 28097, COSPAR 2003-054C) is a retired US satellite, withdrawn from service around 1 May 2013, launched on 2 Dec 2003 on the INTRUDER 6? mission. It was operated by NROC / USN as part of the NOSS3 programme. The spacecraft was built by LMSSD on the NOSS-3 bus, with a mass of 1,000 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
2003
launched
2013
retired
23
years on orbit
1,000
kg mass
Lifecycle
Launched2 Dec 2003 · on the INTRUDER 6? mission
Operational21 May 2013 · entered service
Retired1 May 2013 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID28097
COSPAR2003-054C
TypeSatellite
OperatorNROC / USN
Country / StateUS
ManufacturerLMSSD
BusNOSS-3
Mass1,000 kg
ProgrammeNOSS3
CategorySIG*
OrbitLEO (LEO/I)
Altitude1,011 × 1,202 km
Inclination63.4°
Frequently asked questions
What happened to INTRUDER 4?
INTRUDER 4 was retired from service around 1 May 2013 after launching in 2003. It is no longer operational but remains catalogued.
Who operated and built INTRUDER 4?
INTRUDER 4 was operated by NROC / USN and built by LMSSD (US).
Launched together
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.