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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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 days ago
TLE from 2 days ago
0 USA 72
1 21775U 91076A 26148.24437677 .00000019 00000-0 00000-0 0 9996
2 21775 63.3481 218.4930 3339999 273.0968 49.9844 5.53396640 41459Epoch: 2026-05-28T05:51Z
TLE epoch observation values (Epoch: 2026-05-28T05:51:54.152Z)
Latitude
-0.00003°
Longitude
-115.27585°
Altitude
5,411.633 km
Speed
6.173 km/s
True Right ascension
14h 33m 58s
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
18:44:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
11,631.656 km
Perigee altitude
2,613.261 km
Semi-major axis
13,500.596 km
Eccentricity
0.334
Inclination
63.3481°
RAAN
218.493°
Arg. of periapsis
273.0968°
True anomaly
87.00377°
Mean anomaly
49.9844°
Eccentric anomaly
67.68848°
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. |
|---|---|---|---|---|---|---|---|
| 148 mins | 2026-05-30 10:16:43.472Z | 277.862° WNW | 2026-05-30 11:36:43.472Z | 12.565° NNE | 39.487° | 2026-05-30 12:44:43.472Z | 99.202° ESE |
| 117 mins | 2026-05-30 15:26:43.472Z | 324.737° NNW | 2026-05-30 16:44:43.472Z | 262.967° W | 42.239° | 2026-05-30 17:23:43.472Z | 183.945° SSW |
| 95 mins | 2026-05-31 03:15:43.472Z | 143.285° SSE | 2026-05-31 03:47:43.472Z | 82.353° E | 33.306° | 2026-05-31 04:50:43.472Z | 31.219° NE |
| 93 mins | 2026-05-31 07:40:43.472Z | 236.639° WSW | 2026-05-31 08:26:43.472Z | 320.57° NNW | 42.348° | 2026-05-31 09:13:43.472Z | 32.376° NE |
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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