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SYNCOM 1, 553

Orbit data source: Space-Track

SYNCOM 1, 553 is a payload satellite owned by GSFC (US) that was launched on Thu, 14 Feb 1963 UTC via a THOR DELTA B 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.

Not visible in the next 10 days

SYNCOM 1 details

Identifier	553, 1963-004A
Orbit	Active
Last TLE update	2 days ago
Origin	GSFC (US)
Manufacturer	Hughes
Mission	Non-operational Civil Communications
Bus & Motor	HS-301, TE-M-375
Mass	68 kg wet, ~27 kg dry
Launch date (UTC)	1963-02-14 (62 years ago)
Launch vehicle	THOR DELTA B
Launch site	Air Force Eastern Test Range (AFETR)
Object type	Payload Rocket body Debris
Shape & HBR	Cyl, 0.71 m
Radar Cross Section	0.415 m²

Expand to show TLE details & history

TLE from 2 days ago

0 SYNCOM 1
1 00553U 63004A   25022.85691926 -.00000073  00000-0  00000-0 0  9994
2 00553  27.7733 283.2244 0781259 185.4944 173.6586  1.16483901 30110

Epoch: 2025-01-22T20:33Z

Definitive object data (Epoch: 2025-01-22T20:33:57.824Z)

Latitude	0.00003°
Longitude	-147.66955°
Altitude	34,751.566 km
Speed	2.989 km/s
True Right ascension	18h 53m 03s
True Declination	0° 00' 00"
Sunlit	Object was in daylight at TLE epoch

Visualization TLE readout

Latitude	7.43673°
Longitude	17.96258°
Altitude	28,966.462 km
Speed	3.48 km/s
Apparent Right ascension	06h 27m 40s
Apparent Declination	0° 49' 46"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	00:40:34
Azimuth	91.433° ESE
Elevation	3.004°
Doppler factor	1

Orbital elements

Apogee altitude	34,759.239 km
Perigee altitude	28,797.237 km
Semi-major axis	38,156.375 km
Eccentricity	0.0781259
Inclination	27.7733°
RAAN	283.2244°
Arg. of periapsis	185.4944°
True anomaly	174.55964°
Mean anomaly	173.6586°
Eccentric anomaly	174.11738°
Mean motion	0.2912 °/min
BSTAR	Unknown
Orbital period	1236.26 mins