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OPS 0757 (TACSAT), 3691

Orbit data source: Space-Track

OPS 0757 (TACSAT), 3691 is a payload satellite owned by SAMSO (US) in GEO that was launched on Sun, 09 Feb 1969 UTC via a TITAN IIIC launch vehicle from the Air Force Eastern Test Range (AFETR). Payloads include a variety of satellites, spacecraft, and rockets 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

OPS 0757 (TACSAT) details

Identifier	3691, 1969-013A
Orbit	GEO
Last TLE update	6 hours ago
Origin	SAMSO (US)
Manufacturer	Hughes
Mission	Non-operational Defense Communications
Bus & Motor	HS-308, Unknown motor
Mass	721 kg wet, ~650 kg dry
Launch date (UTC)	1969-02-09 (56 years ago)
Launch vehicle	TITAN IIIC
Launch site	Air Force Eastern Test Range (AFETR)
Object type	Payload Rocket body Debris
Shape & HBR	Cyl, 7.6 m
Radar Cross Section	19.792 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 6 hours ago

0 OPS 0757 (TACSAT)
1 03691U 69013A   25027.91577241 -.00000190  00000-0  00000-0 0  9991
2 03691   1.5666  76.2705 0021723 172.3526 291.2014  1.00451030109039

Epoch: 2025-01-27T21:58Z

Definitive object data (Epoch: 2025-01-27T21:58:42.736Z)

Latitude	1.54883°
Longitude	82.50823°
Altitude	35,703.248 km
Speed	3.079 km/s
True Right ascension	11h 58m 27s
True Declination	1° 32' 50"
Sunlit	Object was in daylight at TLE epoch

Visualization TLE readout

Latitude	-0.28221°
Longitude	169.26886°
Altitude	35,648.856 km
Speed	3.083 km/s
Apparent Right ascension	17h 42m 08s
Apparent Declination	-5° 12' 48"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	05:13:11
Azimuth	347.463° N
Elevation	-54.689°
Doppler factor	1

Orbital elements

Apogee altitude	35,828.979 km
Perigee altitude	35,646.003 km
Semi-major axis	42,115.628 km
Eccentricity	0.0021723
Inclination	1.5666°
RAAN	76.2705°
Arg. of periapsis	172.3526°
True anomaly	290.96909°
Mean anomaly	291.2014°
Eccentric anomaly	291.08527°
Mean motion	0.25112 °/min
BSTAR	Unknown
Orbital period	1433.59 mins