Showing default

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.

Loading next visibility...
Identifier
21798, 1991-082A
Orbit
SSO
Last TLE update
17 hours ago
Origin
Manufacturer
GE/East Windsor
Mission
Non-operational Defense Weather
Bus & Motor
BLOCK 5D, STAR 37S
Mass
1,456 kg wet, 749 kg dry
Launch date (UTC)
1991-11-28 (34 years ago)
Launch vehicle
ATLAS E
Launch site
Air Force Western Test Range (AFWTR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Cyl + 1 Pan, 2.5 m
Radar Cross Section
4.290 m², Large (>1 m²)

Expand to show TLE details & history

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
Epoch: 2025-07-18T00:33Z
TLE epoch observation values (Epoch: 2025-07-18T00:33:49.967Z)
Latitude
-0.00007°
Longitude
-75.59639°
Altitude
845.54 km
Speed
7.426 km/s
True Right ascension
15h 15m 46s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
36.33082°
Longitude
-81.34358°
Altitude
842.358 km
Speed
7.433 km/s
Apparent Right ascension
16h 30m 07s
Apparent Declination
1° 06' 46"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
06:27:25
Azimuth
40.459° NE
Elevation
-41.002°
Doppler factor
1
Orbital elements
Apogee altitude
841.405 km
Perigee altitude
821.793 km
Semi-major axis
7,209.736 km
Eccentricity
0.00136
Inclination
98.7268°
RAAN
228.9427°
Arg. of periapsis
146.7924°
True anomaly
213.325°
Mean anomaly
213.4107°
Eccentric anomaly
213.36784°
Mean motion
3.54539 °/min
Orbital period
101.54 mins
BSTAR
0.000043352
Loading maneuver chart data...
Loading SW <> Apogee altitude chart data...
|