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E-6S No. 204 ISL

Re-entered 3 Mar 1966

E-6S No. 204 ISL (NORAD 2093, COSPAR 1966-017A) was a SU satellite that re-entered Earth's atmosphere on 3 Mar 1966, launched on 1 Mar 1966 on the E-6S No. 204 ISL mission. It was operated by OKB1 as part of the E-6S programme. The spacecraft was built by OKB1 on the E-6 ISL bus, with a mass of 245 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.

1966
launched
1966
re-entered
0
years on orbit
245
kg mass

Lifecycle

Launched1 Mar 1966 · on the E-6S No. 204 ISL mission
Operational1 Mar 1966 · entered service
Retired1 Mar 1966 · end of operational service
Re-entered3 Mar 1966 · atmospheric re-entry — object destroyed

Specifications

NORAD ID2093
COSPAR1966-017A
TypeSatellite
OperatorOKB1
Country / StateSU
ManufacturerOKB1
BusE-6 ISL
Mass245 kg
ProgrammeE-6S
CategoryPLAN
OrbitLEO (LLEO/I)
Altitude182 × 194 km
Inclination51.8°

Frequently asked questions

What happened to E-6S No. 204 ISL?

E-6S No. 204 ISL re-entered Earth's atmosphere on 3 Mar 1966, ending a mission that began with its launch in 1966. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did E-6S No. 204 ISL re-enter the atmosphere?

E-6S No. 204 ISL re-entered on 3 Mar 1966, according to Orbital Radar's historical catalogue records.

Who operated and built E-6S No. 204 ISL?

E-6S No. 204 ISL was operated by OKB1 and built by OKB1 (SU).

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