DS-U3-IK No. 4

Re-entered 6 Sep 1979

DS-U3-IK No. 4 (NORAD 7299, COSPAR 1974-034A) was a SU satellite that re-entered Earth's atmosphere on 6 Sep 1979, launched on 17 May 1974 on the DS-U3-IK No. 4 mission. It was operated by IK as part of the DS-U3-IK programme. The spacecraft was built by YUZH on the DS-U3 bus, with a mass of 335 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.

1974

launched

1979

re-entered

years on orbit

335

kg mass

Lifecycle

Launched17 May 1974 · on the DS-U3-IK No. 4 mission

Operational17 Feb 1975 · entered service

Retired17 Feb 1975 · end of operational service

Re-entered6 Sep 1979 · atmospheric re-entry — object destroyed

Specifications

NORAD ID7299

COSPAR1974-034A

TypeSatellite

OperatorIK

Country / StateSU

ManufacturerYUZH

BusDS-U3

Mass335 kg

ProgrammeDS-U3-IK

CategoryAST

OrbitLEO (LLEO/I)

Altitude483 × 511 km

Inclination50.6°

Frequently asked questions

What happened to DS-U3-IK No. 4?

DS-U3-IK No. 4 re-entered Earth's atmosphere on 6 Sep 1979, ending a mission that began with its launch in 1974. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did DS-U3-IK No. 4 re-enter the atmosphere?

DS-U3-IK No. 4 re-entered on 6 Sep 1979, according to Orbital Radar's historical catalogue records.

Who operated and built DS-U3-IK No. 4?

DS-U3-IK No. 4 was operated by IK and built by YUZH (SU).

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

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