P-11 No. 4301

Re-entered 3 Jan 1965

P-11 No. 4301 (NORAD 826, COSPAR 1964-036B) was a US satellite that re-entered Earth's atmosphere on 3 Jan 1965, launched on 6 Jul 1964 on the GAMBIT SV 959 mission. It was operated by NRO / SAFSP as part of the EHH A programme. The spacecraft was built by LMSC/ATI on the P-11 bus, with a mass of 81 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.

1964

launched

1965

re-entered

year on orbit

kg mass

Lifecycle

Launched6 Jul 1964 · on the GAMBIT SV 959 mission

Operational2 Oct 1964 · entered service

Retired2 Oct 1964 · end of operational service

Re-entered3 Jan 1965 · atmospheric re-entry — object destroyed

Specifications

NORAD ID826

COSPAR1964-036B

TypeSatellite

OperatorNRO / SAFSP

Country / StateUS

ManufacturerLMSC/ATI

BusP-11

Mass81 kg

ProgrammeEHH A

CategorySIG

OrbitLEO (LLEO/P)

Altitude289 × 387 km

Inclination93.0°

Frequently asked questions

What happened to P-11 No. 4301?

P-11 No. 4301 re-entered Earth's atmosphere on 3 Jan 1965, ending a mission that began with its launch in 1964. 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. 4301 re-enter the atmosphere?

P-11 No. 4301 re-entered on 3 Jan 1965, according to Orbital Radar's historical catalogue records.

Who operated and built P-11 No. 4301?

P-11 No. 4301 was operated by NRO / SAFSP and built by LMSC/ATI (US).

Launched together

GAMBIT SV 959Re-entered 1964

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.

Browse the live satellite directory → Re-entered satellites archive → Launch record: GAMBIT SV 959 → What is space debris? →