🛰️ SATELLITE · HISTORICAL RECORD
NNS O-4
Retired 1966NNS O-4 (NORAD 1420, COSPAR 1965-048A) is a retired US satellite, withdrawn from service around 28 Jan 1966, launched on 24 Jun 1965 on the NNS O-4 mission. It was operated by BUWEPS as part of the NNS A programme. The spacecraft was built by APL on the Transit 5 bus, with a mass of 54 kg. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
1965
launched
1966
retired
61
years on orbit
54
kg mass
Lifecycle
Launched24 Jun 1965 · on the NNS O-4 mission
Operational28 Jan 1966 · entered service
Retired28 Jan 1966 · end of operational service
StatusOn orbit (not live-tracked)
Specifications
NORAD ID1420
COSPAR1965-048A
TypeSatellite
OperatorBUWEPS
Country / StateUS
ManufacturerAPL
BusTransit 5
Mass54 kg
ProgrammeNNS A
CategoryNAV
OrbitLEO (LEO/P)
Altitude1,027 × 1,140 km
Inclination90.0°
Frequently asked questions
What happened to NNS O-4?
NNS O-4 was retired from service around 28 Jan 1966 after launching in 1965. It is no longer operational but remains catalogued.
Who operated and built NNS O-4?
NNS O-4 was operated by BUWEPS and built by APL (US).
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.