DS-U1-IK No. 1

Re-entered 7 Jun 1970

DS-U1-IK No. 1 (NORAD 4285, COSPAR 1969-110A) was a SU satellite that re-entered Earth's atmosphere on 7 Jun 1970, launched on 25 Dec 1969 on the DS-U1-IK No. 1 mission. It was operated by IK as part of the DS-U1-IK programme. The spacecraft was built by YUZH on the DS-U1 bus, with a mass of 288 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.

1969

launched

1970

re-entered

year on orbit

288

kg mass

Lifecycle

Launched25 Dec 1969 · on the DS-U1-IK No. 1 mission

Operational25 Feb 1970 · entered service

Retired25 Feb 1970 · end of operational service

Re-entered7 Jun 1970 · atmospheric re-entry — object destroyed

Specifications

NORAD ID4285

COSPAR1969-110A

TypeSatellite

OperatorIK

Country / StateSU

ManufacturerYUZH

BusDS-U1

Mass288 kg

ProgrammeDS-U1-IK

CategorySCI

OrbitLEO (LEO/I)

Altitude200 × 1,078 km

Inclination48.4°

Frequently asked questions

What happened to DS-U1-IK No. 1?

DS-U1-IK No. 1 re-entered Earth's atmosphere on 7 Jun 1970, ending a mission that began with its launch in 1969. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did DS-U1-IK No. 1 re-enter the atmosphere?

DS-U1-IK No. 1 re-entered on 7 Jun 1970, according to Orbital Radar's historical catalogue records.

Who operated and built DS-U1-IK No. 1?

DS-U1-IK No. 1 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.

Browse the live satellite directory → Re-entered satellites archive → Launch record: DS-U1-IK No. 1 → What is space debris? →