Soviet Space ProgramSoyuz U31/6, Baikonur Cosmodrome, Republic of Kazakhstan
Yantar-4KS1 2
Launched
May 14, 1984
Summary
Yantar-4KS1 2 launched on a Soviet Space Program Soyuz U from 31/6, Baikonur Cosmodrome, Republic of Kazakhstan on May 14, 1984. It was Soviet Space Program's 1,792nd launch, 33rd this year and humanity's 2,820th orbital launch attempt. It was the 364th Soyuz U flight and the 13th this year. The payload was bound for low Earth orbit (LEO). Kosmos-1552, one of 5 catalogued objects, reached a 189 × 320 km orbit inclined 64.9°. 5 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
- 364th Soyuz U flight · 13th this yearSoviet Space Program's 1,792nd launch33rd this yearhumanity's 2,820th orbital launch attempt45th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1552 · NORAD 14971 · 1984-045 · Space-Track · tracking 1 of 5 objects
Show the numbers for orbit elements
- Object
- COSMOS 1552
- Object ID
- 1984-045A
- Epoch
- 1984-05-14 13:52:10 UTC
- Mean motion
- 16.09732761 rev/day
- Eccentricity
- 0.0098871
- Inclination
- 64.9484°
- Ascending node
- 118.5145°
- Arg. of perigee
- 66.3693°
- Mean anomaly
- 294.782°
- 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
5 catalogued: 1 payload, 1 rocket stage, 3 components; none still in orbit
- Kosmos-1552 · NORAD 14971 · deorbited November 3, 1984
Soyuz-U No. 364 Blok-I · re-entered May 19, 1984
Data from J. McDowell, planet4589.org
About this launch
First generation electro-optical reconnaissance satellite
Pad

31/6, Baikonur Cosmodrome, Republic of Kazakhstan
275th launch from 31/6, 8th this year · 707th from Baikonur Cosmodrome, Republic of Kazakhstan
430 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
6 days 15 hours after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did Yantar-4KS1 2 launch?
Yantar-4KS1 2 launched on May 14, 1984. The time is known to the hour, not the minute.
Where can I watch Yantar-4KS1 2?
No webcast is on record for this launch.
What rocket launched Yantar-4KS1 2?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Yantar-4KS1 2 launch from?
31/6, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did Yantar-4KS1 2 reach?
Kosmos-1552, one of 5 catalogued objects, reached a 189 × 320 km orbit inclined 64.9°.
How many satellites did Yantar-4KS1 2 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)