Soviet Space ProgramSoyuz U43/4 (43R), Plesetsk Cosmodrome, Russian Federation
Zenit-4MKT 25
Launched
May 22, 1984
Summary
Zenit-4MKT 25 launched on a Soviet Space Program Soyuz U from 43/4 (43R), Plesetsk Cosmodrome, Russian Federation on May 22, 1984. It was Soviet Space Program's 1,795th launch, 36th this year and humanity's 2,823rd orbital launch attempt. It was the 365th Soyuz U flight and the 14th this year. The payload was bound for low Earth orbit (LEO). Kosmos-1557, one of 6 catalogued objects, reached a 218 × 261 km orbit inclined 82.4°. 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
- 365th Soyuz U flight · 14th this yearSoviet Space Program's 1,795th launch36th this yearhumanity's 2,823rd orbital launch attempt48th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1557 · NORAD 14982 · 1984-048 · Space-Track · tracking 1 of 6 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1984-048A
- Epoch
- 1984-05-22 08:19:11 UTC
- Mean motion
- 16.15319988 rev/day
- Eccentricity
- 0.0032308
- Inclination
- 82.374°
- Ascending node
- 34.0193°
- Arg. of perigee
- 109.4871°
- Mean anomaly
- 250.991°
- 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
6 catalogued: 1 payload, 1 rocket stage, 4 components; none still in orbit
- Kosmos-1557 · NORAD 14982 · landed June 4, 1984
Soyuz-U 46-050 Blok-I · re-entered May 26, 1984
Data from J. McDowell, planet4589.org
About this launch
Film-return reconnaissance satellite
Pad

43/4 (43R), Plesetsk Cosmodrome, Russian Federation
166th launch from 43/4 (43R), 3rd this year · 991st from Plesetsk Cosmodrome, Russian Federation
329 launches from this pad · 1,688 from Plesetsk Cosmodrome, Russian Federation
61 days after the previous launch from this pad
All launches from Plesetsk Cosmodrome, Russian FederationOpen in maps
Questions
When did Zenit-4MKT 25 launch?
Zenit-4MKT 25 launched on May 22, 1984. The time is known to the hour, not the minute.
Where can I watch Zenit-4MKT 25?
No webcast is on record for this launch.
What rocket launched Zenit-4MKT 25?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Zenit-4MKT 25 launch from?
43/4 (43R), Plesetsk Cosmodrome, Russian Federation.
What orbit did Zenit-4MKT 25 reach?
Kosmos-1557, one of 6 catalogued objects, reached a 218 × 261 km orbit inclined 82.4°.
How many satellites did Zenit-4MKT 25 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
![[AUTO] Soyuz U - image](/media?u=https%3A%2F%2Fthespacedevs-prod.nyc3.digitaloceanspaces.com%2Fmedia%2Fimages%2Fsoyuz2520u_image_20190222031023.jpeg&w=1600)