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🛰️ SATELLITE · HISTORICAL RECORD

SO-M No. 510

Re-entered 27 Apr 1985

SO-M No. 510 (NORAD 15661, COSPAR 1985-033A) was a SU satellite that re-entered Earth's atmosphere on 27 Apr 1985, launched on 26 Apr 1985 on the SO-M No. 510 mission. It was operated by IKI / BABTS as part of the SO-M programme. The spacecraft was built by NPOL on the SO-M 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.

1985
launched
1985
re-entered
0
years on orbit
1,000
kg mass

Lifecycle

Launched26 Apr 1985 · on the SO-M No. 510 mission
Operational11 Nov 1985 · entered service
Retired1 Jan 1986 · end of operational service
Re-entered27 Apr 1985 · atmospheric re-entry — object destroyed

Specifications

NORAD ID15661
COSPAR1985-033A
TypeSatellite
OperatorIKI / BABTS
Country / StateSU
ManufacturerNPOL
BusSO-M
Mass1,000 kg
ProgrammeSO-M
CategorySCI
OrbitLEO (DSO)
Altitude5,975 × 194,737 km
Inclination76.8°

Frequently asked questions

What happened to SO-M No. 510?

SO-M No. 510 re-entered Earth's atmosphere on 27 Apr 1985, ending a mission that began with its launch in 1985. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did SO-M No. 510 re-enter the atmosphere?

SO-M No. 510 re-entered on 27 Apr 1985, according to Orbital Radar's historical catalogue records.

How long was SO-M No. 510 operational?

SO-M No. 510 was operational for roughly 2 months, from 11 Nov 1985 to 1 Jan 1986.

Who operated and built SO-M No. 510?

SO-M No. 510 was operated by IKI / BABTS and built by NPOL (SU).

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