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USA 61, 20691

Orbit data source: Space-Track

USA 61, 20691 is an American payload satellite in LEO that was launched on Fri, 08 Jun 1990 UTC via a TITAN 405A launch vehicle from the Air Force Eastern Test Range (AFETR). Payloads include a variety of satellites, spacecraft, and rockets 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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USA 61 details
Identifier
20691, 1990-050C
Orbit
LEO
Last TLE update19 hours ago
Origin
Flag of USNRO/NRL (US)
ManufacturerNRL
MissionDefense Sigint
Bus & MotorNOSS B SSU, Unknown motor
Mass~400 kg wet, ~400 kg dry
Launch date (UTC)
1990-06-08 (35 years ago)
Launch vehicle
TITAN 405A
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBRCyl, 1 m
Radar Cross Section1.178 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 19 hours ago
0 USA 61
1 20691U 90050C   25014.79406963  .00005517  00000-0  43822-3 0  9998
2 20691  63.2964 164.4002 0898331  75.2505 294.6236 13.56363551 35797
Epoch: 2025-01-14T19:03Z
Definitive object data (Epoch: 2025-01-14T19:03:27.616Z)
Latitude-0.00002°
Longitude124.03947°
Altitude824.895 km
Speed7.553 km/s
True Right ascension10h 57m 36s
True Declination0° 00' 00"
Sunlit
Object was in full shadow at TLE epoch
Visualization TLE readout
Latitude-1.63808°
Longitude121.05587°
Altitude844.893 km
Speed7.533 km/s
Apparent Right ascension08h 03m 46s
Apparent Declination-31° 43' 07"
Sunlit
Object is in full shadow
Visualization observer readout
Local Sidereal Time15:11:28
Azimuth253.288° W
Elevation-31.823°
Doppler factor1
Orbital elements
Apogee altitude1,714.85 km
Perigee altitude380.668 km
Semi-major axis7,425.896 km
Eccentricity0.0898331
Inclination63.2964°
RAAN164.4002°
Arg. of periapsis75.2505°
True anomaly284.85502°
Mean anomaly294.6236°
Eccentric anomaly289.78023°
Mean motion3.39172 °/min
BSTAR0.00043822
Orbital period106.14 mins
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USA 61 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 mins2025-01-15 20:20:46.223Z326.962° NNW2025-01-15 20:23:46.223Z0.885° NNE44.915°2025-01-15 20:28:46.223Z146.427° SSE
5 mins2025-01-16 11:55:46.223Z240.046° WSW2025-01-16 11:57:46.223Z297.283° NW35.282°2025-01-16 12:00:46.223Z20.405° NNE
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