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HEXAGON SV-16

Re-entered 6 Mar 1981

HEXAGON SV-16 (NORAD 11850, COSPAR 1980-052A) was a US satellite that re-entered Earth's atmosphere on 6 Mar 1981, launched on 18 Jun 1980 on the HEXAGON SV-16 mission. It was operated by NRO / SAFSP as part of the Hex III programme. The spacecraft was built by LMSC on the KH-9 bus, with a mass of 8,211 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.

1980
launched
1981
re-entered
1
year on orbit
8,211
kg mass

Lifecycle

Launched18 Jun 1980 · on the HEXAGON SV-16 mission
Operational6 Mar 1981 · entered service
Retired6 Mar 1981 · end of operational service
Re-entered6 Mar 1981 · atmospheric re-entry — object destroyed

Specifications

NORAD ID11850
COSPAR1980-052A
TypeSatellite
OperatorNRO / SAFSP
Country / StateUS
ManufacturerLMSC
BusKH-9
Mass8,211 kg (6,311 kg dry)
ProgrammeHex III
CategoryIMG
OrbitLEO (LLEO/S)
Altitude164 × 245 km
Inclination96.4°

Frequently asked questions

What happened to HEXAGON SV-16?

HEXAGON SV-16 re-entered Earth's atmosphere on 6 Mar 1981, ending a mission that began with its launch in 1980. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did HEXAGON SV-16 re-enter the atmosphere?

HEXAGON SV-16 re-entered on 6 Mar 1981, according to Orbital Radar's historical catalogue records.

Who operated and built HEXAGON SV-16?

HEXAGON SV-16 was operated by NRO / SAFSP and built by LMSC (US).

Launched together

SS E1NORAD 11852
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.