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Cosmos 1666
Soviet signals intelligence satellite. Cosmos 1666 was launched on July 8, 1985 aboard a Tsiklon-3 from Plesetsk. Latest status in GCAT: reentered (orbital decay) (Jun 15, 2025).
COSPAR 1985-058ANORAD 15889Soviet Union
Identity
- Name in GCAT
- Kosmos-1666
- Common name
- Cosmos 1666
- Payload designation
- Ikar No. 46L
- Other names
- Tselina-D No. 46L:P,11F619 No. 670-32-346:RA
- International designator
- 1985-058A
- NORAD catalog number
- 15889
- GCAT identifier
- S15889
- UN registration
- ST/SG/SER.E/136
Mission
- Mission type
- Signals intelligence
- Use
- Defense
- Program
- Tselina-D
- Owner
- GRU
- Country
- Soviet Union
- Builder
- Southern State Design Bureau
- Platform (bus)
- Tselina-D
Launch
- Date
- July 8, 1985 · 23:40 UTC
- Launch record
- 1985-058Success
- Rocket
- Tsiklon-3
- Spaceport
- Plesetsk · pad LC32/2
Orbit and fate
- Orbit class (GCAT)
- LEO/I
- Perigee
- 611 km
- Apogee
- 641 km
- Inclination
- 82.50°
- Status
- Reentered (orbital decay)
- Status date
- June 15, 2025
- Last known active
- 1987
- End of operations
- 1987
Size
- Mass
- 1,750 kg
- Dry mass
- 1,750 kg
- Length
- 3.2 m
- Diameter
- 1.30 m
- Span
- 13.1 m
Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q13566682 (CC0).