USA 57, 20561
Orbit data source: Space-Track
USA 57, 20561 is a payload satellite owned by USAF SSD (US) in LEO that was launched on Wed, 11 Apr 1990 UTC via an ATLAS E ALTAIR 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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20561 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Last TLE update
13 hours ago
Origin
Manufacturer
DSI
Mission
Defense Technology
Bus & Motor
MINISTAR, Unknown motor
Mass
67 kg wet, 67 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & history
TLE from 13 hours ago
0 USA 57
1 20561U 90031B 25161.79483213 .00000452 00000-0 66407-4 0 9997
2 20561 89.8459 271.9091 0064661 293.2932 66.1490 14.72625968 60519Epoch: 2025-06-10T19:04Z
TLE epoch observation values (Epoch: 2025-06-10T19:04:33.496Z)
Latitude
-0.00002°
Longitude
86.38296°
Altitude
637.687 km
Speed
7.549 km/s
True Right ascension
18h 07m 38s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
-84.9193°
Longitude
-91.90292°
Altitude
640.661 km
Speed
7.559 km/s
Apparent Right ascension
06h 02m 25s
Apparent Declination
-63° 25' 53"
Sunlit
Visualization observer readout
Local Sidereal Time
18:00:53
Azimuth
180.43° SSW
Elevation
-66.484°
Doppler factor
1
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Other satellites on launch #31 in the year 1990 (1990-04-11 UTC)
USA 57 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-06-11 08:14:44.625Z | 205.24° SW | 2025-06-11 08:17:44.625Z | 256.824° W | 33.507° | 2025-06-11 08:21:44.625Z | 339.685° N |
| 4 mins | 2025-06-11 18:30:44.625Z | 55.101° ENE | 2025-06-11 18:32:44.625Z | 83.48° E | 15.147° | 2025-06-11 18:34:44.625Z | 110.827° ESE |
| 7 mins | 2025-06-11 20:07:44.625Z | 341.586° N | 2025-06-11 20:10:44.625Z | 267.261° W | 36.809° | 2025-06-11 20:14:44.625Z | 204.039° SW |
| 6 mins | 2025-06-12 07:05:44.625Z | 134.005° SE | 2025-06-12 07:08:44.625Z | 67.174° ENE | 29.595° | 2025-06-12 07:11:44.625Z | 20.232° NNE |
Event ID | Pc | Md | Secondary | Secondary name | Country | Click to unsort rows by TCA header |
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