DS-P1-Yu No. 77L

Re-entered 6 Jan 1976

DS-P1-Yu No. 77L (NORAD 7730, COSPAR 1975-026A) was a SU satellite that re-entered Earth's atmosphere on 6 Jan 1976, launched on 8 Apr 1975 on the DS-P1-Yu No. 77 mission. It was operated by PVO as part of the DS-P1-Yu A programme. The spacecraft was built by YUZH on the DS-P1 bus, with a mass of 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.

1975

launched

1976

re-entered

year on orbit

200

kg mass

Lifecycle

Launched8 Apr 1975 · on the DS-P1-Yu No. 77 mission

Operational2 Jan 1976 · entered service

Retired2 Jan 1976 · end of operational service

Re-entered6 Jan 1976 · atmospheric re-entry — object destroyed

Specifications

NORAD ID7730

COSPAR1975-026A

TypeSatellite

OperatorPVO

Country / StateSU

ManufacturerYUZH

BusDS-P1

Mass200 kg

ProgrammeDS-P1-Yu A

CategoryCAL

OrbitLEO (LLEO/I)

Altitude267 × 467 km

Inclination71.0°

Frequently asked questions

What happened to DS-P1-Yu No. 77L?

DS-P1-Yu No. 77L re-entered Earth's atmosphere on 6 Jan 1976, ending a mission that began with its launch in 1975. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did DS-P1-Yu No. 77L re-enter the atmosphere?

DS-P1-Yu No. 77L re-entered on 6 Jan 1976, according to Orbital Radar's historical catalogue records.

Who operated and built DS-P1-Yu No. 77L?

DS-P1-Yu No. 77L was operated by PVO 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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