USA 72, 21775
Orbit data source: Space-Track
USA 72, 21775 is an American payload satellite in HEO that was launched on Fri, 08 Nov 1991 UTC via a TITAN 403A launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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21775 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Defense Sigint
Bus & Motor
NOSS B, Unknown motor
Mass
~3,000 kg wet, ~3,000 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.5 m
Radar Cross Section
1.178 m²
Expand to show TLE details & historyLast TLE update: 2 weeks ago
TLE from 2 weeks ago
0 USA 72
1 21775U 91076A 25321.33827065 -.00000034 00000-0 00000-0 0 9990
2 21775 63.3771 297.4270 3361651 272.8520 49.8953 5.53396242 30834Epoch: 2025-11-17T08:07Z
TLE epoch observation values (Epoch: 2025-11-17T08:07:06.584Z)
Latitude
0.00004°
Longitude
119.00394°
Altitude
5,404.441 km
Speed
6.176 km/s
True Right ascension
19h 49m 41s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
09:12:16
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
11,660.891 km
Perigee altitude
2,584.031 km
Semi-major axis
13,500.598 km
Eccentricity
0.33617
Inclination
63.3771°
RAAN
297.427°
Arg. of periapsis
272.852°
True anomaly
87.1751°
Mean anomaly
49.8953°
Eccentric anomaly
67.7179°
Mean motion
1.38361 °/min
Orbital period
260.19 mins
BSTAR
0
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Other satellites on launch #76 in the year 1991 (1991-11-08 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.USA 72 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 112 mins | 2025-11-30 21:19:21.795Z | 174.094° S | 2025-11-30 21:54:21.795Z | 96.799° ESE | 41.676° | 2025-11-30 23:11:21.795Z | 34.763° NE |
| 146 mins | 2025-12-01 01:57:21.795Z | 261.133° W | 2025-12-01 02:58:21.795Z | 345.654° N | 39.596° | 2025-12-01 04:23:21.795Z | 81.116° E |
| 125 mins | 2025-12-01 07:06:21.795Z | 319.641° NNW | 2025-12-01 08:31:21.795Z | 252.881° W | 44.79° | 2025-12-01 09:11:21.795Z | 164.744° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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