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 25246.16612034 -.00000020 00000-0 00000-0 0 9990
2 21775 63.3897 328.4168 3367940 272.7173 50.0096 5.53395412 26671Epoch: 2025-09-03T03:59Z
TLE epoch observation values (Epoch: 2025-09-03T03:59:12.797Z)
Latitude
-0.00002°
Longitude
-73.93223°
Altitude
5,410.957 km
Speed
6.173 km/s
True Right ascension
21h 53m 40s
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
09:33:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
11,669.397 km
Perigee altitude
2,575.548 km
Semi-major axis
13,500.61 km
Eccentricity
0.33679
Inclination
63.3897°
RAAN
328.4168°
Arg. of periapsis
272.7173°
True anomaly
87.39819°
Mean anomaly
50.0096°
Eccentric anomaly
67.88707°
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. |
|---|---|---|---|---|---|---|---|
| 96 mins | 2025-09-13 17:02:12.881Z | 326.584° NNW | 2025-09-13 18:01:12.881Z | 276.648° WNW | 35.187° | 2025-09-13 18:38:12.881Z | 210.384° SW |
| 109 mins | 2025-09-14 04:30:12.881Z | 170.438° S | 2025-09-14 05:03:12.881Z | 96.737° ESE | 41.258° | 2025-09-14 06:19:12.881Z | 34.379° NE |
| 147 mins | 2025-09-14 09:05:12.881Z | 258.917° W | 2025-09-14 10:06:12.881Z | 344.731° N | 39.713° | 2025-09-14 11:32:12.881Z | 80.052° E |
| 127 mins | 2025-09-14 14:14:12.881Z | 318.955° NNW | 2025-09-14 15:40:12.881Z | 253.458° W | 44.874° | 2025-09-14 16:21:12.881Z | 162.818° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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