2026-244Latest orbital launch: Falcon 9 · Starlink Group 15-16 · Oct 27, 2026 · VandenbergLaunch record →
sci-techmaventhe history of spaceflight, in data
  1. Home
  2. Spacecraft
  3. Cosmos 666
// optical imaging · 1974

Cosmos 666

Cosmos 666 was launched on July 12, 1974 aboard a Voskhod 11A57 from Plesetsk. Latest status in GCAT: landed (Jul 25, 1974).

COSPAR 1974-053ANORAD 7367Soviet Union

Identity

Name in GCAT
Kosmos-666
Common name
Cosmos 666
Payload designation
Germes No. 31L
Other names
Zenit-4MK No. 31L:P,11F692 No. 760-29-761:RA
International designator
1974-053A
NORAD catalog number
7367
GCAT identifier
S07367
UN registration
A/AC.105/INF.298

Mission

Mission type
Optical imaging
Use
Defense
Program
Zenit-4MK
Country
Soviet Union
Builder
Central Specialized Design Bureau
Platform (bus)
Zenit-4MK

Launch

Date
July 12, 1974 · 12:50 UTC
Launch record
1974-053Success
Spaceport
Plesetsk · pad LC43/4

Orbit and fate

Orbit class (GCAT)
LLEO/I
Perigee
180 km
Apogee
328 km
Inclination
62.81°
Status
Landed
Status date
July 25, 1974
Last known active
Jul 25, 1974
End of operations
Jul 25, 1974

Size

Mass
2,310 kg
Dry mass
2,310 kg
Total mass with attached objects
6,010 kg
Length
6.0 m
Diameter
2.20 m
Span
6.0 m

Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q13566894 (CC0).