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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.

Not visible in the next 10 days
Identifier
858, 1964-047A
Orbit
GEO
Country
Flag of USUS
Related business
Manufacturer
Hughes
Mission
Non-operational Civil Communications
Bus & Motor
HS-301, SR-12-1
Mass
66 kg wet, 33 kg dry
Launch date (UTC)
1964-08-19 (61 years ago)
Launch vehicle
THOR DELTA D
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Cyl, 0.4 m
Radar Cross Section
0.415 m², Large (>1 m²)

Expand to show TLE details & history
Last 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
Epoch: 2025-09-09T19:15Z
TLE epoch observation values (Epoch: 2025-09-09T19:15:55.281Z)
Latitude
-2.67018°
Longitude
-5.4193°
Altitude
35,762.581 km
Speed
3.076 km/s
True Right ascension
18h 10m 35s
True Declination
-2° 40' 03"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
N/A
Visualization observer readout
Local Sidereal Time
04:03:44
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,797.385 km
Perigee altitude
35,754.017 km
Semi-major axis
42,153.838 km
Eccentricity
0.00051
Inclination
6.2766°
RAAN
67.3427°
Arg. of periapsis
149.1884°
True anomaly
56.26881°
Mean anomaly
56.2198°
Eccentric anomaly
56.2443°
Mean motion
0.25078 °/min
Orbital period
1,435.54 mins
BSTAR
0
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Other satellites on launch #47 in the year 1964 (1964-08-19 UTC)

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