77KSO No. 173-01

Re-entered 1 Jun 1995

77KSO No. 173-01 (NORAD 23579, COSPAR 1995-024A) was a RU satellite that re-entered Earth's atmosphere on 1 Jun 1995, launched on 20 May 1995 on the TsM-O No. 17301 mission. It was operated by RKKE as part of the TsM programme. The spacecraft was built by KHRU on the 77KS bus, with a mass of 22,000 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.

1995

launched

1995

re-entered

years on orbit

22,000

kg mass

Lifecycle

Launched20 May 1995 · on the TsM-O No. 17301 mission

Operational23 Mar 2001 · entered service

Retired23 Mar 2001 · end of operational service

Re-entered1 Jun 1995 · atmospheric re-entry — object destroyed

Specifications

NORAD ID23579

COSPAR1995-024A

TypeSatellite

OperatorRKKE

Country / StateRU

ManufacturerKHRU

Bus77KS

Mass22,000 kg (19,500 kg dry)

ProgrammeTsM

CategorySS

OrbitLEO (LLEO/I)

Altitude392 × 400 km

Inclination51.6°

Frequently asked questions

What happened to 77KSO No. 173-01?

77KSO No. 173-01 re-entered Earth's atmosphere on 1 Jun 1995, ending a mission that began with its launch in 1995. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did 77KSO No. 173-01 re-enter the atmosphere?

77KSO No. 173-01 re-entered on 1 Jun 1995, according to Orbital Radar's historical catalogue records.

Who operated and built 77KSO No. 173-01?

77KSO No. 173-01 was operated by RKKE and built by KHRU (RU).

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: TsM-O No. 17301 → What is space debris? →