SYNCOM 3, 858
Orbit data source: Space-Track
SYNCOM 3, 858 is a payload satellite owned by GSFC (US) in GEO that was launched on Wed, 19 Aug 1964 UTC via a THOR DELTA D 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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858 intel report (Beta)
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Expand to show TLE details & historyLast TLE update: 4 days ago
TLE from 4 days ago
0 SYNCOM 3
1 00858U 64047A 25252.80272316 -.00000040 00000-0 00000-0 0 9992
2 00858 6.2766 67.3427 0005144 149.1884 56.2198 1.00314414 50653
TLE epoch observation values (Epoch: 2025-09-09T19:15:55.281Z)
Visualization orbit readout
Visualization observer readout
Orbital elements
Other satellites on launch #47 in the year 1964 (1964-08-19 UTC)
SYNCOM 3 Visibility
Loading observer location...
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. |
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SYNCOM 3 is likely not visible in the next few days. |
858 neighbors
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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