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 18 hours ago
0 DMSP 5D-2 F11 (USA 73)
1 21798U 91082A 25210.74233457 .00000084 00000-0 62973-4 0 9995
2 21798 98.7265 240.4509 0014011 115.5015 244.7611 14.17321793739456
TLE epoch observation values (Epoch: 2025-07-29T17:48:57.706Z)
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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10 mins | 2025-07-30 14:43:07.294Z | 18.622° NNE | 2025-07-30 14:48:07.294Z | 86.565° E | 42.998° | 2025-07-30 14:53:07.294Z | 185.272° SSW |
5 mins | 2025-07-30 16:26:07.294Z | 323.325° NNW | 2025-07-30 16:28:07.294Z | 298.396° NW | 15.254° | 2025-07-30 16:31:07.294Z | 263.725° W |
8 mins | 2025-07-31 02:08:07.294Z | 174.282° S | 2025-07-31 02:12:07.294Z | 295.637° NW | 43.376° | 2025-07-31 02:16:07.294Z | 341.565° N |
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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