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.
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553 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Hughes
Mission
Non-operational spacecraft
Bus & Motor
HS-301, TE-M-375
Mass
68 kg wet, ~27 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
RCS unknown
Expand to show TLE details & historyLast TLE update: 3 weeks ago
TLE from 3 weeks ago
0 SYNCOM 1
1 00553U 63004A 25276.94885762 -.00000094 00000-0 00000-0 0 9991
2 00553 27.2448 278.0403 0795167 193.6440 164.0362 1.16484256 33070Epoch: 2025-10-03T22:46Z
TLE epoch observation values (Epoch: 2025-10-03T22:46:21.298Z)
Latitude
0.00001°
Longitude
-76.45952°
Altitude
34,700.578 km
Speed
2.993 km/s
True Right ascension
18h 32m 04s
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
17:24:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
34,812.238 km
Perigee altitude
28,744.11 km
Semi-major axis
38,156.311 km
Eccentricity
0.07952
Inclination
27.2448°
RAAN
278.0403°
Arg. of periapsis
193.644°
True anomaly
166.3224°
Mean anomaly
164.0362°
Eccentric anomaly
165.2°
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)
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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.SYNCOM 1 Visibility
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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. |
|---|---|---|---|---|---|---|---|
| SYNCOM 1 is likely not visible in the next few days. |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
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