P-11 No. 4425

Re-entered 6 May 1978

P-11 No. 4425 (NORAD 6096, COSPAR 1972-052C) was a US satellite that re-entered Earth's atmosphere on 6 May 1978, launched on 7 Jul 1972 on the HEXAGON SV-3 mission. It was operated by NRO / SAFSP as part of the EHH B programme. The spacecraft was built by LMSC/MOTO on the P-11 H bus, with a mass of 167 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.

1972

launched

1978

re-entered

years on orbit

167

kg mass

Lifecycle

Launched7 Jul 1972 · on the HEXAGON SV-3 mission

Operational6 May 1978 · entered service

Retired6 May 1978 · end of operational service

Re-entered6 May 1978 · atmospheric re-entry — object destroyed

Specifications

NORAD ID6096

COSPAR1972-052C

TypeSatellite

OperatorNRO / SAFSP

Country / StateUS

ManufacturerLMSC/MOTO

BusP-11 H

Mass167 kg

ProgrammeEHH B

CategorySIG

OrbitLEO (LLEO/S)

Altitude493 × 501 km

Inclination96.1°

Frequently asked questions

What happened to P-11 No. 4425?

P-11 No. 4425 re-entered Earth's atmosphere on 6 May 1978, ending a mission that began with its launch in 1972. 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. 4425 re-enter the atmosphere?

P-11 No. 4425 re-entered on 6 May 1978, according to Orbital Radar's historical catalogue records.

Who operated and built P-11 No. 4425?

P-11 No. 4425 was operated by NRO / SAFSP and built by LMSC/MOTO (US).

Launched together

HEXAGON SV-3Re-entered 1972

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: HEXAGON SV-3 → What is space debris? →