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🛰️ SATELLITE · HISTORICAL RECORD

P-11 No. 4405

Re-entered 5 Mar 1970

P-11 No. 4405 (NORAD 2397, COSPAR 1966-074B) was a US satellite that re-entered Earth's atmosphere on 5 Mar 1970, launched on 16 Aug 1966 on the GAMBIT SV 981 mission. It was operated by NRO / SAFSP as part of the EHH B programme. The spacecraft was built by LMSC/SEL on the P-11 L bus, with a mass of 111 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.

1966
launched
1970
re-entered
4
years on orbit
111
kg mass

Lifecycle

Launched16 Aug 1966 · on the GAMBIT SV 981 mission
Operational14 Oct 1967 · entered service
Retired14 Oct 1967 · end of operational service
Re-entered5 Mar 1970 · atmospheric re-entry — object destroyed

Specifications

NORAD ID2397
COSPAR1966-074B
TypeSatellite
OperatorNRO / SAFSP
Country / StateUS
ManufacturerLMSC/SEL
BusP-11 L
Mass111 kg
ProgrammeEHH B
CategorySIG
OrbitLEO (LLEO/P)
Altitude509 × 518 km
Inclination93.2°

Frequently asked questions

What happened to P-11 No. 4405?

P-11 No. 4405 re-entered Earth's atmosphere on 5 Mar 1970, ending a mission that began with its launch in 1966. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did P-11 No. 4405 re-enter the atmosphere?

P-11 No. 4405 re-entered on 5 Mar 1970, according to Orbital Radar's historical catalogue records.

Who operated and built P-11 No. 4405?

P-11 No. 4405 was operated by NRO / SAFSP and built by LMSC/SEL (US).

Launched together

GAMBIT SV 981Re-entered 1966
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.