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Soviet Space ProgramSoyuz U41/1, Plesetsk Cosmodrome, Russian Federation
Zenit-4MT 20
Launched
January 16, 1981
Summary
Zenit-4MT 20 launched on a Soviet Space Program Soyuz U from 41/1, Plesetsk Cosmodrome, Russian Federation on January 16, 1981. It was Soviet Space Program's 1,455th launch, 4th this year and humanity's 2,395th orbital launch attempt. It was the 225th Soyuz U flight and the 2nd this year. The payload was bound for low Earth orbit (LEO). The tracked orbit of Kosmos-1239, one of 2 catalogued objects, from January 28, 1981, was 204 × 216 km inclined 82.3°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Soyuz U · Soviet Space Program
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Low Earth Orbit (LEO)
- Milestone
- 225th Soyuz U flight · 2nd this yearSoviet Space Program's 1,455th launch4th this yearhumanity's 2,395th orbital launch attempt4th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1239 · NORAD 12140 · 1981-004 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- COSMOS 1239
- Object ID
- 1981-004A
- Epoch
- 1981-01-28 05:09:42 UTC
- Mean motion
- 16.26244302 rev/day
- Eccentricity
- 0.0008922
- Inclination
- 82.3326°
- Ascending node
- 308.4862°
- Arg. of perigee
- 63.3302°
- Mean anomaly
- 296.8694°
- Element set
- 999
- Rev at epoch
- 190
- B*
- 0.000019912
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; none still in orbit
- Kosmos-1239 · NORAD 12140 · landed January 28, 1981
Soyuz-U 17-821 Blok-I · re-entered January 20, 1981
Data from J. McDowell, planet4589.org
About this launch
Film-return reconnaissance satellite
Pad
41/1, Plesetsk Cosmodrome, Russian Federation
197th launch from 41/1, 3rd this year · 791st from Plesetsk Cosmodrome, Russian Federation
310 launches from this pad · 1,688 from Plesetsk Cosmodrome, Russian Federation
6 days 21 hours after the previous launch from this pad
All launches from Plesetsk Cosmodrome, Russian FederationOpen in maps
Questions
When did Zenit-4MT 20 launch?
Zenit-4MT 20 launched on January 16, 1981. The time is known to the hour, not the minute.
Where can I watch Zenit-4MT 20?
No webcast is on record for this launch.
What rocket launched Zenit-4MT 20?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Zenit-4MT 20 launch from?
41/1, Plesetsk Cosmodrome, Russian Federation.
What orbit did Zenit-4MT 20 reach?
The tracked orbit of Kosmos-1239, one of 2 catalogued objects, from January 28, 1981, was 204 × 216 km inclined 82.3°.
How many satellites did Zenit-4MT 20 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).