NOAA 21, 54234
Orbit data source: Space-Track
NOAA 21, 54234 is an American payload satellite in SSO that was launched on Thu, 10 Nov 2022 UTC via an ATLAS V 401 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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54234 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
NGIS SSG Gilbert
Mission
Operational Civil Weather
Bus & Motor
LEOSTAR-3, AOCS
Mass
2,930 kg wet, ~2,525 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 5.3 m
Radar Cross Section
8.698 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 NOAA 21
1 54234U 22150A 26141.25034758 .00000025 00000-0 32664-4 0 9998
2 54234 98.7052 80.4933 0000517 290.1874 69.9247 14.19559916182729Epoch: 2026-05-21T06:00Z
TLE epoch observation values (Epoch: 2026-05-21T06:00:30.030Z)
Latitude
-0.00001°
Longitude
111.46993°
Altitude
829.628 km
Speed
7.438 km/s
True Right ascension
05h 21m 58s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
23:42:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
824.373 km
Perigee altitude
823.628 km
Semi-major axis
7,202.137 km
Eccentricity
0.00005
Inclination
98.7052°
RAAN
80.4933°
Arg. of periapsis
290.1874°
True anomaly
69.93026°
Mean anomaly
69.9247°
Eccentric anomaly
69.92748°
Mean motion
3.551 °/min
Orbital period
101.38 mins
BSTAR
0.000032664
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Other satellites on launch #150 in the year 2022 (2022-11-10 UTC)
No other RSOs were in this launch
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.NOAA 21 Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-05-21 19:38:45.996Z | 155.469° SSE | 2026-05-21 19:43:45.996Z | 95.415° ESE | 42.712° | 2026-05-21 19:48:45.996Z | 352.529° N |
| 7 mins | 2026-05-22 07:59:45.996Z | 48.533° ENE | 2026-05-22 08:02:45.996Z | 95.799° ESE | 26.085° | 2026-05-22 08:06:45.996Z | 151.724° SSE |
| 7 mins | 2026-05-22 09:39:45.996Z | 345.111° N | 2026-05-22 09:42:45.996Z | 296.857° NW | 29.46° | 2026-05-22 09:46:45.996Z | 234.236° WSW |
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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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