![[AUTO] Soyuz U - image](/media?u=https%3A%2F%2Fthespacedevs-prod.nyc3.digitaloceanspaces.com%2Fmedia%2Fimages%2Fsoyuz2520u_image_20190222031023.jpeg&w=1600)
Soviet Space ProgramSoyuz U43/3 (43L), Plesetsk Cosmodrome, Russian Federation
Zenit-4MT 21
Launched
September 18, 1981
Summary
Zenit-4MT 21 launched on a Soviet Space Program Soyuz U from 43/3 (43L), Plesetsk Cosmodrome, Russian Federation on September 18, 1981. It was Soviet Space Program's 1,528th launch, 77th this year and humanity's 2,485th orbital launch attempt. It was the 258th Soyuz U flight and the 35th this year. The payload was bound for low Earth orbit (LEO). Kosmos-1309, one of 2 catalogued objects, reached a 222 × 752 km orbit inclined 81.9°. 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
- 258th Soyuz U flight · 35th this yearSoviet Space Program's 1,528th launch77th this yearhumanity's 2,485th orbital launch attempt94th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1309 · NORAD 12837 · 1981-092 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1981-092A
- Epoch
- 1981-09-18 10:48:29 UTC
- Mean motion
- 15.28614192 rev/day
- Eccentricity
- 0.0386477
- Inclination
- 81.8881°
- Ascending node
- 165.5022°
- Arg. of perigee
- 50.4383°
- Mean anomaly
- 313.0326°
- Element set
- 999
- Rev at epoch
- 0
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; none still in orbit
- Kosmos-1309 · NORAD 12837 · landed October 1, 1981
Soyuz-U 23-802 Blok-I · re-entered September 21, 1981
Data from J. McDowell, planet4589.org
About this launch
Film-return reconnaissance satellite
Pad
43/3 (43L), Plesetsk Cosmodrome, Russian Federation
139th launch from 43/3 (43L), 15th this year · 834th from Plesetsk Cosmodrome, Russian Federation
234 launches from this pad · 1,688 from Plesetsk Cosmodrome, Russian Federation
2 days 22 hours after the previous launch from this pad
All launches from Plesetsk Cosmodrome, Russian FederationOpen in maps
Questions
When did Zenit-4MT 21 launch?
Zenit-4MT 21 launched on September 18, 1981. The time is known to the hour, not the minute.
Where can I watch Zenit-4MT 21?
No webcast is on record for this launch.
What rocket launched Zenit-4MT 21?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Zenit-4MT 21 launch from?
43/3 (43L), Plesetsk Cosmodrome, Russian Federation.
What orbit did Zenit-4MT 21 reach?
Kosmos-1309, one of 2 catalogued objects, reached a 222 × 752 km orbit inclined 81.9°.
How many satellites did Zenit-4MT 21 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).