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🛰️ SATELLITE · HISTORICAL RECORD

NNS O-3

Re-entered 14 Jun 1965

NNS O-3 (NORAD 1303, COSPAR 1965-017A) was a US satellite that re-entered Earth's atmosphere on 14 Jun 1965, launched on 11 Mar 1965 on the Secor Type II S/N 3 mission. It was operated by BUWEPS as part of the NNS N programme. The spacecraft was built by NAFI on the Transit 5 bus, with a mass of 54 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.

1965
launched
1965
re-entered
0
years on orbit
54
kg mass

Lifecycle

Launched11 Mar 1965 · on the Secor Type II S/N 3 mission
Operational6 Apr 1965 · entered service
Retired6 Apr 1965 · end of operational service
Re-entered14 Jun 1965 · atmospheric re-entry — object destroyed

Specifications

NORAD ID1303
COSPAR1965-017A
TypeSatellite
OperatorBUWEPS
Country / StateUS
ManufacturerNAFI
BusTransit 5
Mass54 kg
ProgrammeNNS N
CategoryNAV
OrbitLEO (LLEO/P)
Altitude207 × 854 km
Inclination90.0°

Frequently asked questions

What happened to NNS O-3?

NNS O-3 re-entered Earth's atmosphere on 14 Jun 1965, ending a mission that began with its launch in 1965. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did NNS O-3 re-enter the atmosphere?

NNS O-3 re-entered on 14 Jun 1965, according to Orbital Radar's historical catalogue records.

Who operated and built NNS O-3?

NNS O-3 was operated by BUWEPS and built by NAFI (US).

Launched together

Secor II S/N 3 (TR-27)Re-entered 1968
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.