DMSP 5D-2 F11 (USA 73), 21798
Orbit data source: Space-Track
DMSP 5D-2 F11 (USA 73), 21798 is a payload satellite owned by USAF SSD (US) in SSO that was launched on Thu, 28 Nov 1991 UTC via an ATLAS E 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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21798 intel report (Beta)
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TLE from 17 hours ago
0 DMSP 5D-2 F11 (USA 73)
1 21798U 91082A 25199.02349500 .00000044 00000-0 43352-4 0 9995
2 21798 98.7268 228.9427 0013601 146.7924 213.4107 14.17318491738046
TLE epoch observation values (Epoch: 2025-07-18T00:33:49.967Z)
Visualization orbit readout
Visualization observer readout
Orbital elements
Other satellites on launch #82 in the year 1991 (1991-11-28 UTC)
DMSP 5D-2 F11 (USA 73) 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. |
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5 mins | 2025-07-19 00:27:46.140Z | 89.371° E | 2025-07-19 00:30:46.140Z | 54.622° ENE | 13.903° | 2025-07-19 00:32:46.140Z | 31.986° NE |
9 mins | 2025-07-19 02:05:46.140Z | 171.411° S | 2025-07-19 02:09:46.140Z | 225.334° WSW | 44.119° | 2025-07-19 02:14:46.140Z | 342.984° N |
8 mins | 2025-07-19 14:26:46.140Z | 35.879° NE | 2025-07-19 14:29:46.140Z | 91.842° ESE | 35.838° | 2025-07-19 14:34:46.140Z | 171.553° S |
6 mins | 2025-07-19 16:07:46.140Z | 328.797° NNW | 2025-07-19 16:09:46.140Z | 299.962° NW | 20.932° | 2025-07-19 16:13:46.140Z | 248.391° W |
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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Event ID | Pc | Md | Secondary | Secondary name | Country | Click to unsort rows by TCA header |
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