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HEXAGON SV-10

Re-entered 5 Nov 1975

HEXAGON SV-10 (NORAD 7918, COSPAR 1975-051A) was a US satellite that re-entered Earth's atmosphere on 5 Nov 1975, launched on 8 Jun 1975 on the HEXAGON SV-10 mission. It was operated by NRO / SAFSP as part of the Hex II programme. The spacecraft was built by LMSC on the KH-9 bus, with a mass of 7,624 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.

1975
launched
1975
re-entered
0
years on orbit
7,624
kg mass

Lifecycle

Launched8 Jun 1975 · on the HEXAGON SV-10 mission
Operational5 Nov 1975 · entered service
Retired5 Nov 1975 · end of operational service
Re-entered5 Nov 1975 · atmospheric re-entry — object destroyed

Specifications

NORAD ID7918
COSPAR1975-051A
TypeSatellite
OperatorNRO / SAFSP
Country / StateUS
ManufacturerLMSC
BusKH-9
Mass7,624 kg (6,099 kg dry)
ProgrammeHex II
CategoryIMG
OrbitLEO (LLEO/S)
Altitude156 × 264 km
Inclination96.4°

Frequently asked questions

What happened to HEXAGON SV-10?

HEXAGON SV-10 re-entered Earth's atmosphere on 5 Nov 1975, ending a mission that began with its launch in 1975. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did HEXAGON SV-10 re-enter the atmosphere?

HEXAGON SV-10 re-entered on 5 Nov 1975, according to Orbital Radar's historical catalogue records.

Who operated and built HEXAGON SV-10?

HEXAGON SV-10 was operated by NRO / SAFSP and built by LMSC (US).

Launched together

P-226 No. 1NORAD 7937
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.