HomeLibraryRe-entered SatellitesESO
🛰️ SATELLITE · HISTORICAL RECORD

ESO

Re-entered 1 Oct 1989

ESO (NORAD 20184, COSPAR 1988-113X) was a SU satellite that re-entered Earth's atmosphere on 1 Oct 1989, launched on 23 Dec 1988 on the Kol'tso No. 1L mission. It was operated by PVO as part of the ESO programme. The spacecraft was built by YUZH on the ESO bus, with a mass of 5 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.

1988
launched
1989
re-entered
1
year on orbit
5
kg mass

Lifecycle

Launched23 Dec 1988 · on the Kol'tso No. 1L mission
Operational16 Aug 1989 · entered service
Retired16 Aug 1989 · end of operational service
Re-entered1 Oct 1989 · atmospheric re-entry — object destroyed

Specifications

NORAD ID20184
COSPAR1988-113X
TypeSatellite
OperatorPVO
Country / StateSU
ManufacturerYUZH
BusESO
Mass5 kg
ProgrammeESO
CategoryCAL
OrbitLEO (LLEO/I)
Altitude500 × 512 km
Inclination73.5°

Frequently asked questions

What happened to ESO?

ESO re-entered Earth's atmosphere on 1 Oct 1989, ending a mission that began with its launch in 1988. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did ESO re-enter the atmosphere?

ESO re-entered on 1 Oct 1989, according to Orbital Radar's historical catalogue records.

Who operated and built ESO?

ESO was operated by PVO and built by YUZH (SU).

Launched together

Kol'tso No. 1LRe-entered 1992ESORe-entered 1989ESORe-entered 1989ESORe-entered 1989ESORe-entered 1989ESORe-entered 1990ESORe-entered 1989ESORe-entered 1989
Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.