Zenit-4 No. 7L

Re-entered 2 Sep 1965

Zenit-4 No. 7L (NORAD 1523, COSPAR 1965-069A) was a SU satellite that re-entered Earth's atmosphere on 2 Sep 1965, launched on 25 Aug 1965 on the Zenit-4 No. 7 mission. It was operated by TSUKOS as part of the Zenit-4 programme. The spacecraft was built by OKB1F3 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.

1965

launched

1965

re-entered

years on orbit

2,200

kg mass

Lifecycle

Launched25 Aug 1965 · on the Zenit-4 No. 7 mission

Operational2 Sep 1965 · entered service

Retired2 Sep 1965 · end of operational service

Re-entered2 Sep 1965 · atmospheric re-entry — object destroyed

Specifications

NORAD ID1523

COSPAR1965-069A

TypeSatellite

OperatorTSUKOS

Country / StateSU

ManufacturerOKB1F3

BusZenit-4

Mass2,200 kg

ProgrammeZenit-4

CategoryIMG

OrbitLEO (LLEO/I)

Altitude205 × 338 km

Inclination64.9°

Frequently asked questions

What happened to Zenit-4 No. 7L?

Zenit-4 No. 7L re-entered Earth's atmosphere on 2 Sep 1965, ending a mission that began with its launch in 1965. 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. 7L re-enter the atmosphere?

Zenit-4 No. 7L re-entered on 2 Sep 1965, according to Orbital Radar's historical catalogue records.

Who operated and built Zenit-4 No. 7L?

Zenit-4 No. 7L was operated by TSUKOS and built by OKB1F3 (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. 7 → What is space debris? →