Zenit-4 No. 66L

Re-entered 16 Apr 1970

Zenit-4 No. 66L (NORAD 4364, COSPAR 1970-026A) was a SU satellite that re-entered Earth's atmosphere on 16 Apr 1970, launched on 8 Apr 1970 on the Zenit-4 No. 66 mission. It was operated by GUKOSR as part of the Zenit-4 programme. The spacecraft was built by TSKBE3 on the Zenit-4 bus, with a mass of 2,200 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.

1970

launched

1970

re-entered

years on orbit

2,200

kg mass

Lifecycle

Launched8 Apr 1970 · on the Zenit-4 No. 66 mission

Operational16 Apr 1970 · entered service

Retired16 Apr 1970 · end of operational service

Re-entered16 Apr 1970 · atmospheric re-entry — object destroyed

Specifications

NORAD ID4364

COSPAR1970-026A

TypeSatellite

OperatorGUKOSR

Country / StateSU

ManufacturerTSKBE3

BusZenit-4

Mass2,200 kg

ProgrammeZenit-4

CategoryIMG

OrbitLEO (LLEO/I)

Altitude205 × 319 km

Inclination65.0°

Frequently asked questions

What happened to Zenit-4 No. 66L?

Zenit-4 No. 66L re-entered Earth's atmosphere on 16 Apr 1970, ending a mission that began with its launch in 1970. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Zenit-4 No. 66L re-enter the atmosphere?

Zenit-4 No. 66L re-entered on 16 Apr 1970, according to Orbital Radar's historical catalogue records.

Who operated and built Zenit-4 No. 66L?

Zenit-4 No. 66L was operated by GUKOSR and built by TSKBE3 (SU).

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: Zenit-4 No. 66 → What is space debris? →