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🛰️ SATELLITE · HISTORICAL RECORD

Mercury SC8A

Re-entered 13 Sep 1961

Mercury SC8A (NORAD 183, COSPAR 1961 A ALP 1) was a US satellite that re-entered Earth's atmosphere on 13 Sep 1961, launched on 13 Sep 1961. It was operated by STGL as part of the Mercury MA programme. The spacecraft was built by MCDA on the Mercury bus, with a mass of 1,000 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.

1961
launched
1961
re-entered
0
years on orbit
1,000
kg mass

Lifecycle

Launched13 Sep 1961
Operational13 Sep 1961 · entered service
Retired13 Sep 1961 · end of operational service
Re-entered13 Sep 1961 · atmospheric re-entry — object destroyed

Specifications

NORAD ID183
COSPAR1961 A ALP 1
TypeSatellite
OperatorSTGL
Country / StateUS
ManufacturerMCDA
BusMercury
Mass1,000 kg
ProgrammeMercury MA
CategorySS
OrbitLEO (LLEO/I)
Altitude149 × 240 km
Inclination32.5°

Frequently asked questions

What happened to Mercury SC8A?

Mercury SC8A re-entered Earth's atmosphere on 13 Sep 1961, ending a mission that began with its launch in 1961. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Mercury SC8A re-enter the atmosphere?

Mercury SC8A re-entered on 13 Sep 1961, according to Orbital Radar's historical catalogue records.

Who operated and built Mercury SC8A?

Mercury SC8A was operated by STGL and built by MCDA (US).

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