Soviet Space ProgramMolniya-M 2BL41/1, Plesetsk Cosmodrome, Russian Federation
US-K 55
Launched
December 21, 1987
Image: Jonathan Space Report
Summary
US-K 55 launched on a Soviet Space Program Molniya-M 2BL from 41/1, Plesetsk Cosmodrome, Russian Federation on December 21, 1987. It was Soviet Space Program's 2,142nd launch, 92nd this year and humanity's 3,248th orbital launch attempt. It was the 200th Molniya-M 2BL flight and the 4th this year. The payload was bound for Elliptical Orbit (Elliptical). Kosmos-1903, one of 5 catalogued objects, reached a 588 × 39,123 km orbit inclined 62.9°. 5 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Molniya-M 2BL · Soviet Space Program
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Elliptical Orbit (Elliptical)
- Milestone
- 200th Molniya-M 2BL flight · 4th this yearSoviet Space Program's 2,142nd launch92nd this yearhumanity's 3,248th orbital launch attempt109th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1903 · NORAD 18701 · 1987-105 · Space-Track · tracking 1 of 5 objects
Show the numbers for orbit elements
- Object
- COSMOS 1903
- Object ID
- 1987-105A
- Epoch
- 1987-12-21 11:57:23 UTC
- Mean motion
- 2.04402813 rev/day
- Eccentricity
- 0.7346496
- Inclination
- 62.9312°
- Ascending node
- 18.8431°
- Arg. of perigee
- 318.2017°
- Mean anomaly
- 1.3092°
- Element set
- 999
- Rev at epoch
- 2
- B*
- 0.000099999
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: Elliptical. Ascent drawn from padside's representative profile.
Catalogued objects
5 catalogued: 1 payload, 2 rocket stages, 2 components; 2 still in orbit
- Kosmos-1903 · NORAD 18701 · in orbit
Molniya-M 28-514 Blok-I · re-entered February 9, 1988
Blok-2BL · in orbit
Data from J. McDowell, planet4589.org
About this launch
Early warning satellite
Pad
41/1, Plesetsk Cosmodrome, Russian Federation
292nd launch from 41/1, 7th this year · 1,196th from Plesetsk Cosmodrome, Russian Federation
310 launches from this pad · 1,688 from Plesetsk Cosmodrome, Russian Federation
83 days after the previous launch from this pad
All launches from Plesetsk Cosmodrome, Russian FederationOpen in maps
Questions
When did US-K 55 launch?
US-K 55 launched on December 21, 1987. The time is known to the hour, not the minute.
Where can I watch US-K 55?
No webcast is on record for this launch.
What rocket launched US-K 55?
Molniya-M 2BL, flown by Soviet Space Program. Molniya-M 2BL spec sheet
Where did US-K 55 launch from?
41/1, Plesetsk Cosmodrome, Russian Federation.
What orbit did US-K 55 reach?
Kosmos-1903, one of 5 catalogued objects, reached a 588 × 39,123 km orbit inclined 62.9°.
How many satellites did US-K 55 launch?
1 payload from this launch is catalogued, still in orbit (Data from J. McDowell, planet4589.org).