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SBIRS GEO 4 (USA 273), 41937

Orbit data source: Space-Track

SBIRS GEO 4 (USA 273), 41937 is a payload satellite owned by USAF AFSPC (US) in GEO that was launched on Sat, 21 Jan 2017 UTC via an ATLAS V 401 launch vehicle from the Air Force Eastern Test Range (AFETR). Payloads include a variety of satellites, spacecraft, and rockets 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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SBIRS GEO 4 (USA 273) details

Identifier	41937, 2017-004A
Orbit	GEO
Last TLE update	22 hours ago
Origin	USAF AFSPC (US)
Manufacturer	LMSS
Mission	Operational Defense Early Warn
Bus & Motor	A2100, LEROS 1C?
Mass	~4,500 kg wet, ~2,500 kg dry
Launch date (UTC)	2017-01-21 (8 years ago)
Launch vehicle	ATLAS V 401
Launch site	Air Force Eastern Test Range (AFETR)
Object type	Payload Rocket body Debris
Shape & HBR	Box + 2 Pan, 25 m
Radar Cross Section	33.213 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 22 hours ago

0 SBIRS GEO 4 (USA 273)
1 41937U 17004A   24360.50985463 -.00000118  00000-0  00000-0 0  9992
2 41937   1.4716  15.2119 0002379 258.9422 267.0976  1.00271698 29201

Epoch: 2024-12-25T12:14Z

Definitive object data (Epoch: 2024-12-25T12:14:11.44Z)

Latitude	0.35422°
Longitude	-96.82704°
Altitude	35,786.57 km
Speed	3.075 km/s
True Right ascension	12h 04m 53s
True Declination	0° 21' 14"
Sunlit	Object was in daylight at TLE epoch

Visualization TLE readout

Latitude	1.06872°
Longitude	-128.77393°
Altitude	35,791.761 km
Speed	3.074 km/s
Apparent Right ascension	10h 01m 26s
Apparent Declination	-5° 01' 49"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	09:23:54
Azimuth	166.897° S
Elevation	44.23°
Doppler factor	1

Orbital elements

Apogee altitude	35,797.72 km
Perigee altitude	35,777.657 km
Semi-major axis	42,165.826 km
Eccentricity	0.0002379
Inclination	1.4716°
RAAN	15.2119°
Arg. of periapsis	258.9422°
True anomaly	267.07037°
Mean anomaly	267.0976°
Eccentric anomaly	267.08399°
Mean motion	0.25067 °/min
BSTAR	Unknown
Orbital period	1436.15 mins