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: 22 hours ago
TLE from 22 hours ago
0 USA 72
1 21775U 91076A 26059.51946104 .00000018 00000-0 00000-0 0 9996
2 21775 63.3585 254.9439 3349656 273.0273 49.9059 5.53394654 36548Epoch: 2026-02-28T12:28Z
TLE epoch observation values (Epoch: 2026-02-28T12:28:01.433Z)
Latitude
0°
Longitude
-90.39418°
Altitude
5,406.923 km
Speed
6.175 km/s
True Right ascension
16h 59m 48s
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
14:27:07
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
11,644.735 km
Perigee altitude
2,600.244 km
Semi-major axis
13,500.626 km
Eccentricity
0.33497
Inclination
63.3585°
RAAN
254.9439°
Arg. of periapsis
273.0273°
True anomaly
87.03221°
Mean anomaly
49.9059°
Eccentric anomaly
67.65718°
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. |
|---|---|---|---|---|---|---|---|
| 35 mins | 2026-03-01 10:50:33.785Z | 61.617° ENE | 2026-03-01 10:50:33.785Z | 61.617° ENE | 18.32° | 2026-03-01 11:25:33.785Z | 33.276° NE |
| 125 mins | 2026-03-01 14:28:33.785Z | 205.639° SW | 2026-03-01 15:05:33.785Z | 297.361° NW | 44.99° | 2026-03-01 16:33:33.785Z | 44.2° NE |
| 146 mins | 2026-03-01 19:19:33.785Z | 288.49° WNW | 2026-03-01 20:45:33.785Z | 25.802° NE | 40.475° | 2026-03-01 21:45:33.785Z | 110.776° ESE |
| 110 mins | 2026-03-02 00:27:33.785Z | 326.768° NNW | 2026-03-02 01:40:33.785Z | 268.491° W | 39.283° | 2026-03-02 02:17:33.785Z | 197.058° SSW |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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