Soviet Space ProgramSoyuz U1/5, Baikonur Cosmodrome, Republic of Kazakhstan
Yantar-4K2 9
Launched
July 31, 1984
Summary
Yantar-4K2 9 launched on a Soviet Space Program Soyuz U from 1/5, Baikonur Cosmodrome, Republic of Kazakhstan on July 31, 1984. It was Soviet Space Program's 1,820th launch, 61st this year and humanity's 2,852nd orbital launch attempt. It was the 378th Soyuz U flight and the 27th this year. The payload was bound for low Earth orbit (LEO). The tracked orbit of Kosmos-1585, one of 2 catalogued objects, from August 6, 1984, was 175 × 316 km inclined 64.7°. 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
- 378th Soyuz U flight · 27th this yearSoviet Space Program's 1,820th launch61st this yearhumanity's 2,852nd orbital launch attempt77th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1585 · NORAD 15142 · 1984-077 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1984-077A
- Epoch
- 1984-08-06 05:06:01 UTC
- Mean motion
- 16.12963518 rev/day
- Eccentricity
- 0.0106581
- Inclination
- 64.7292°
- Ascending node
- 150.9903°
- Arg. of perigee
- 66.3248°
- Mean anomaly
- 294.9142°
- Element set
- 999
- Rev at epoch
- 92
- B*
- 0.00020911
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; none still in orbit
- Kosmos-1585 · NORAD 15142 · landed September 28, 1984
Soyuz-U 46-823 Blok-I · re-entered August 3, 1984
Data from J. McDowell, planet4589.org
About this launch
Film-return reconnaissance satellite
Pad

1/5, Baikonur Cosmodrome, Republic of Kazakhstan
208th launch from 1/5, 2nd this year · 715th from Baikonur Cosmodrome, Republic of Kazakhstan
487 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
50 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did Yantar-4K2 9 launch?
Yantar-4K2 9 launched on July 31, 1984. The time is known to the hour, not the minute.
Where can I watch Yantar-4K2 9?
No webcast is on record for this launch.
What rocket launched Yantar-4K2 9?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Yantar-4K2 9 launch from?
1/5, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did Yantar-4K2 9 reach?
The tracked orbit of Kosmos-1585, one of 2 catalogued objects, from August 6, 1984, was 175 × 316 km inclined 64.7°.
How many satellites did Yantar-4K2 9 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)