USA 76, 21808
Orbit data source: Space-Track
USA 76, 21808 is an American payload satellite in LEO 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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21808 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Last TLE update
8 hours ago
Origin
Manufacturer
NRL
Mission
Defense Sigint
Bus & Motor
NOSS B SSU, Unknown motor
Mass
~400 kg wet, ~400 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 1 m
Radar Cross Section
1.178 m², Large (>1 m²)
Expand to show TLE details & history
TLE from 8 hours ago
0 USA 76
1 21808U 91076D 25185.58402540 .00006253 00000-0 54171-3 0 9998
2 21808 63.3038 2.5414 0891311 68.1017 301.2312 13.55436900 58849Epoch: 2025-07-04T14:00Z
TLE epoch observation values (Epoch: 2025-07-04T14:00:59.794Z)
Latitude
-0.00012°
Longitude
-130.54213°
Altitude
756.812 km
Speed
7.625 km/s
True Right ascension
00h 10m 09s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
61.62805°
Longitude
-19.17758°
Altitude
486.005 km
Speed
7.919 km/s
Apparent Right ascension
23h 50m 23s
Apparent Declination
38° 09' 41"
Sunlit
Visualization observer readout
Local Sidereal Time
09:23:23
Azimuth
331.821° NNW
Elevation
-4.975°
Doppler factor
1
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Other satellites on launch #76 in the year 1991 (1991-11-08 UTC)
USA 76 Visibility forecast
Observer location: undefined°, undefined°
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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-07-04 21:35:17.652Z | 353.086° N | 2025-07-04 21:38:17.652Z | 47.544° ENE | 26.831° | 2025-07-04 21:43:17.652Z | 113.206° SE |
| 8 mins | 2025-07-04 23:25:17.652Z | 289.743° WNW | 2025-07-04 23:28:17.652Z | 231.476° WSW | 28.377° | 2025-07-04 23:33:17.652Z | 179.401° S |
| 4 mins | 2025-07-05 13:11:17.652Z | 174.022° S | 2025-07-05 13:13:17.652Z | 113.306° SE | 29.701° | 2025-07-05 13:15:17.652Z | 59.716° ENE |
Event ID | Pc | Md | Secondary | Secondary name | Country | Click to unsort rows by TCA header |
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