Soviet Space ProgramVoskhod31/6, Baikonur Cosmodrome, Republic of Kazakhstan
Zenit-4 21
Launched
August 8, 1966
Image: RKK Energia
Summary
Zenit-4 21 launched on a Soviet Space Program Voskhod from 31/6, Baikonur Cosmodrome, Republic of Kazakhstan on August 8, 1966. It was Soviet Space Program's 196th launch, 34th this year and humanity's 595th orbital launch attempt. It was the 28th Voskhod flight and the 10th this year. The payload was bound for low Earth orbit (LEO). Kosmos-127, one of 2 catalogued objects, reached a 211 × 277 km orbit inclined 51.8°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Voskhod · Soviet Space Program
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Low Earth Orbit (LEO)
- Milestone
- 28th Voskhod flight · 10th this yearSoviet Space Program's 196th launch34th this yearhumanity's 595th orbital launch attempt78th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-127 · NORAD 2391 · 1966-071 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1966-071A
- Epoch
- 1966-08-08 14:17:10 UTC
- Mean motion
- 16.13598976 rev/day
- Eccentricity
- 0.0050253
- Inclination
- 51.8418°
- Ascending node
- 139.1676°
- Arg. of perigee
- 64.5087°
- Mean anomaly
- 296.029°
- Element set
- 999
- Rev at epoch
- 2
- 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-127 · NORAD 2391 · landed August 16, 1966
Voskhod (N28) Blok-I · re-entered August 12, 1966
Data from J. McDowell, planet4589.org
About this launch
Zenit-4 film-return reconnaissance satellite.
Pad

31/6, Baikonur Cosmodrome, Republic of Kazakhstan
56th launch from 31/6, 20th this year · 152nd from Baikonur Cosmodrome, Republic of Kazakhstan
430 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
11 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did Zenit-4 21 launch?
Zenit-4 21 launched on August 8, 1966. The time is known to the hour, not the minute.
Where can I watch Zenit-4 21?
No webcast is on record for this launch.
What rocket launched Zenit-4 21?
Voskhod, flown by Soviet Space Program. Voskhod spec sheet
Where did Zenit-4 21 launch from?
31/6, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did Zenit-4 21 reach?
Kosmos-127, one of 2 catalogued objects, reached a 211 × 277 km orbit inclined 51.8°.
How many satellites did Zenit-4 21 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
