Soviet Space ProgramVoskhod43/4 (43R), Plesetsk Cosmodrome, Russian Federation
Zenit-4MK 5
Launched
June 11, 1971
Image: RKK Energia
Summary
Zenit-4MK 5 launched on a Soviet Space Program Voskhod from 43/4 (43R), Plesetsk Cosmodrome, Russian Federation on June 11, 1971. It was Soviet Space Program's 581st launch, 40th this year and humanity's 1,231st orbital launch attempt. It was the 155th Voskhod flight and the 12th this year. The payload was bound for low Earth orbit (LEO). Kosmos-427, one of 5 catalogued objects, reached a 206 × 342 km orbit inclined 72.8°. 5 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
- 155th Voskhod flight · 12th this yearSoviet Space Program's 581st launch40th this yearhumanity's 1,231st orbital launch attempt60th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-427 · NORAD 5289 · 1971-055 · Space-Track · tracking 1 of 5 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1971-055A
- Epoch
- 1971-06-11 11:18:05 UTC
- Mean motion
- 16.02786446 rev/day
- Eccentricity
- 0.0102194
- Inclination
- 72.8441°
- Ascending node
- 53.6826°
- Arg. of perigee
- 63.1022°
- Mean anomaly
- 298.0558°
- 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
5 catalogued: 1 payload, 1 rocket stage, 3 components; none still in orbit
- Kosmos-427 · NORAD 5289 · landed June 23, 1971
Voskhod (N155) Blok-I · re-entered June 20, 1971
Data from J. McDowell, planet4589.org
About this launch
High resolution optical reconnaissance satellite of the Vostok-based Zenit family.
Pad

43/4 (43R), Plesetsk Cosmodrome, Russian Federation
19th launch from 43/4 (43R), 6th this year · 185th from Plesetsk Cosmodrome, Russian Federation
329 launches from this pad · 1,688 from Plesetsk Cosmodrome, Russian Federation
13 days after the previous launch from this pad
All launches from Plesetsk Cosmodrome, Russian FederationOpen in maps
Questions
When did Zenit-4MK 5 launch?
Zenit-4MK 5 launched on June 11, 1971. The time is known to the hour, not the minute.
Where can I watch Zenit-4MK 5?
No webcast is on record for this launch.
What rocket launched Zenit-4MK 5?
Voskhod, flown by Soviet Space Program. Voskhod spec sheet
Where did Zenit-4MK 5 launch from?
43/4 (43R), Plesetsk Cosmodrome, Russian Federation.
What orbit did Zenit-4MK 5 reach?
Kosmos-427, one of 5 catalogued objects, reached a 206 × 342 km orbit inclined 72.8°.
How many satellites did Zenit-4MK 5 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
