Soviet Space ProgramSoyuz U1/5, Baikonur Cosmodrome, Republic of Kazakhstan
Yantar-4KS1 6
Launched
December 26, 1986
Summary
Yantar-4KS1 6 launched on a Soviet Space Program Soyuz U from 1/5, Baikonur Cosmodrome, Republic of Kazakhstan on December 26, 1986. It was Soviet Space Program's 2,049th launch, 93rd this year and humanity's 3,138th orbital launch attempt. It was the 459th Soyuz U flight and the 33rd this year. The payload was bound for low Earth orbit (LEO). Kosmos-1810, one of 5 catalogued objects, reached a 189 × 287 km orbit inclined 64.8°. 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
- 459th Soyuz U flight · 33rd this yearSoviet Space Program's 2,049th launch93rd this yearhumanity's 3,138th orbital launch attempt109th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1810 · NORAD 17262 · 1986-102 · Space-Track · tracking 1 of 5 objects
Show the numbers for orbit elements
- Object
- COSMOS 1810
- Object ID
- 1986-102A
- Epoch
- 1986-12-26 19:46:52 UTC
- Mean motion
- 16.15961768 rev/day
- Eccentricity
- 0.0074
- Inclination
- 64.7534°
- Ascending node
- 293.8347°
- Arg. of perigee
- 65.6769°
- Mean anomaly
- 295.1093°
- Element set
- 999
- Rev at epoch
- 6
- B*
- 0.00016566
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-1810 · NORAD 17262 · deorbited September 11, 1987
Soyuz-U 56-206 Blok-I · re-entered December 31, 1986
Data from J. McDowell, planet4589.org
About this launch
First generation electro-optical reconnaissance satellite
Pad

1/5, Baikonur Cosmodrome, Republic of Kazakhstan
232nd launch from 1/5, 12th this year · 800th from Baikonur Cosmodrome, Republic of Kazakhstan
487 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
22 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did Yantar-4KS1 6 launch?
Yantar-4KS1 6 launched on December 26, 1986. The time is known to the hour, not the minute.
Where can I watch Yantar-4KS1 6?
No webcast is on record for this launch.
What rocket launched Yantar-4KS1 6?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Yantar-4KS1 6 launch from?
1/5, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did Yantar-4KS1 6 reach?
Kosmos-1810, one of 5 catalogued objects, reached a 189 × 287 km orbit inclined 64.8°.
How many satellites did Yantar-4KS1 6 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)