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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). 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.

Not visible in the next 10 days
Identifier
553, 1963-004A
Orbit
Active
Last TLE update
4 days ago
Origin
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 4 days ago
0 SYNCOM 1
1 00553U 63004A   25183.38145451 -.00000128  00000-0  00000-0 0  9998
2 00553  27.4367 279.9601 0792596 190.6146 167.6705  1.16484263 31981
Epoch: 2025-07-02T09:09Z
TLE epoch observation values (Epoch: 2025-07-02T09:09:17.669Z)
Latitude
-0.00003°
Longitude
-138.00519°
Altitude
34,749.772 km
Speed
2.989 km/s
True Right ascension
18h 39m 55s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
-17.21996°
Longitude
78.49806°
Altitude
29,080.92 km
Speed
3.469 km/s
Apparent Right ascension
08h 57m 27s
Apparent Declination
-20° 40' 09"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
19:58:12
Azimuth
322.313° NNW
Elevation
-66.963°
Doppler factor
1
Orbital elements
Apogee altitude
34,802.421 km
Perigee altitude
28,753.914 km
Semi-major axis
38,156.305 km
Eccentricity
0.07926
Inclination
27.4367°
RAAN
279.9601°
Arg. of periapsis
190.6146°
True anomaly
Unknown
Mean anomaly
167.6705°
Eccentric anomaly
Unknown
Mean motion
0.2912 °/min
Orbital period
1,236.26 mins
BSTAR
0
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Other satellites on launch #4 in the year 1963 (1963-02-14 UTC)

SYNCOM 1 Visibility

Observer location: undefined°, undefined°

SYNCOM 1 is likely not visible in the next few days
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