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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
Last TLE update
2 weeks ago
Origin
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

TLE from 2 weeks ago
0 SYNCOM 3
1 00858U 64047A   25188.37961380 -.00000103  00000-0  00000-0 0  9998
2 00858   6.1211  68.0100 0003632 138.1442 201.2599  1.00313022 50001
Epoch: 2025-07-07T09:06Z
TLE epoch observation values (Epoch: 2025-07-07T09:06:38.632Z)
Latitude
-2.14661°
Longitude
-14.74043°
Altitude
35,789.071 km
Speed
3.074 km/s
True Right ascension
03h 10m 02s
True Declination
-2° 08' 40"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
6.01706°
Longitude
82.60255°
Altitude
35,766.84 km
Speed
3.076 km/s
Apparent Right ascension
10h 05m 57s
Apparent Declination
0° 27' 48"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
03:31:29
Azimuth
84.091° E
Elevation
-6.299°
Doppler factor
1
Orbital elements
Apogee altitude
35,791.402 km
Perigee altitude
35,760.781 km
Semi-major axis
42,154.229 km
Eccentricity
0.00036
Inclination
6.1211°
RAAN
68.01°
Arg. of periapsis
138.1442°
True anomaly
201.24482°
Mean anomaly
201.2599°
Eccentric anomaly
201.25236°
Mean motion
0.25077 °/min
Orbital period
1,435.56 mins
BSTAR
0
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