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Soviet Space ProgramSoyuz U31/6, Baikonur Cosmodrome, Republic of Kazakhstan
Zenit-4MK 21
Launched
March 20, 1974
Summary
Zenit-4MK 21 launched on a Soviet Space Program Soyuz U from 31/6, Baikonur Cosmodrome, Republic of Kazakhstan on March 20, 1974. It was Soviet Space Program's 811th launch, 10th this year and humanity's 1,555th orbital launch attempt. It was the 4th Soyuz U flight and the 1st this year. The payload was bound for low Earth orbit (LEO). Kosmos-636, one of 6 catalogued objects, reached a 184 × 387 km orbit inclined 65.1°. 6 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
- 4th Soyuz U flight · 1st this yearSoviet Space Program's 811th launch10th this yearhumanity's 1,555th orbital launch attempt17th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-636 · NORAD 7225 · 1974-016 · Space-Track · tracking 1 of 6 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1974-016A
- Epoch
- 1974-03-20 09:52:07 UTC
- Mean motion
- 15.98502636 rev/day
- Eccentricity
- 0.0152902
- Inclination
- 65.1423°
- Ascending node
- 340.5835°
- Arg. of perigee
- 77.5875°
- Mean anomaly
- 284.2308°
- Element set
- 999
- Rev at epoch
- 1
- 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
6 catalogued: 1 payload, 1 rocket stage, 4 components; none still in orbit
- Kosmos-636 · NORAD 7225 · landed April 3, 1974
Soyuz-U No. 006 Blok-I · re-entered March 24, 1974
Data from J. McDowell, planet4589.org
About this launch
High resolution optical reconnaissance satellite of the Vostok-based Zenit family.
Pad
31/6, Baikonur Cosmodrome, Republic of Kazakhstan
146th launch from 31/6, 2nd this year · 391st from Baikonur Cosmodrome, Republic of Kazakhstan
430 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
35 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did Zenit-4MK 21 launch?
Zenit-4MK 21 launched on March 20, 1974. The time is known to the hour, not the minute.
Where can I watch Zenit-4MK 21?
No webcast is on record for this launch.
What rocket launched Zenit-4MK 21?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Zenit-4MK 21 launch from?
31/6, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did Zenit-4MK 21 reach?
Kosmos-636, one of 6 catalogued objects, reached a 184 × 387 km orbit inclined 65.1°.
How many satellites did Zenit-4MK 21 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).