Launch Date
February 12, 1991
Launch Site
PLMSC
Launch Pad
LC133/3
Launch Vehicle
Kosmos 11K65M
NORAD ID
21104
International Designator
1991-009E
Epoch
Sat, 04 Jul 2026 06:29:06 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
74.03°
Right Ascension
176.46°
Eccentricity
Calculating...
Argument of Perigee
342.70°
Period
114.86 min
Mean Motion
12.54 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Name
COSMOS 2129
Alternative Name
Kosmos-2129
Type
Status
Owner
UNKSR
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
1 21104U 91009E 26185.27021875 -.00000015 00000-0 97423-5 0 9998
2 21104 74.0275 176.4599 0025171 342.7001 28.5565 12.53744382619667
Source: Celestrak
Length
0.8
Diameter
0.8
Span
0.8
Dry Mass
60
Launch Mass
60
Shape
Poly
Radar Cross Section
0.666
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Payload
Strela-1M Blok 45 No. 5
Purpose
Military Communication
Mission
Military Communication
Manufacturer
NPOPM
Life Expectancy
6 months
Bus
Strela-1 11F625
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Solar cells, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Learn more about satellites and other related topics.
On January 20, 1972, the second KH-9 HEXAGON lifted off from Vandenberg - carrying the most sophisticated reconnaissance system ever built by engineers who weren't allowed to say 'film,' 'camera,' or even talk to each other about what they were doing.
SpaceX embarks on another milestone as it prepares to launch an advanced GPS satellite for the U.S. Space Force today, aiming for a record 170 launches this year.
SpaceX successfully launches 28 Starlink satellites on a new Falcon 9 rocket from California, marking a significant milestone for their satellite constellation.
Starship developments continue to capture attention alongside Starlink's latest deployment milestones.
Today's brief covers the future of military space operations, ESA's potential defense role, significant developments in satellite communications, and SpaceX's response to Artemis 3 comments.
Today's briefs cover SpaceX landing a Falcon 9 in The Bahamas, first disabled astronaut prepped for a mission, and key company updates from Blue Origin and K2 Space.
SpaceX ignited all 33 next-gen Raptor V3 engines on the Super Heavy booster at Starbase, Texas, marking a critical milestone toward the next Starship flight.
Today we cover the final launch of Vega's original version, a significant milestone for SpaceX with the U.S. military, preparations for NASA's Starliner return, and more.
