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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	11 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 11 hours ago

0 OPS 0757 (TACSAT)
1 03691U 69013A   25018.55240719 -.00000137  00000-0  00000-0 0  9999
2 03691   1.5429  76.2258 0021972 171.6323 145.8654  1.00451875108931

Epoch: 2025-01-18T13:15Z

Definitive object data (Epoch: 2025-01-18T13:15:27.981Z)

Latitude	-1.05101°
Longitude	76.83231°
Altitude	35,812.193 km
Speed	3.071 km/s
True Right ascension	02h 15m 35s
True Declination	-1° 02' 60"
Sunlit	Object was in daylight at TLE epoch

Visualization TLE readout

Latitude	1.29022°
Longitude	-116.49436°
Altitude	35,673.004 km
Speed	3.081 km/s
Apparent Right ascension	13h 21m 29s
Apparent Declination	-3° 48' 32"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	01:14:36
Azimuth	357.087° N
Elevation	-53.859°
Doppler factor	1

Orbital elements

Apogee altitude	35,829.791 km
Perigee altitude	35,644.719 km
Semi-major axis	42,115.392 km
Eccentricity	0.0021972
Inclination	1.5429°
RAAN	76.2258°
Arg. of periapsis	171.6323°
True anomaly	146.00636°
Mean anomaly	145.8654°
Eccentric anomaly	145.93591°
Mean motion	0.25112 °/min
BSTAR	Unknown
Orbital period	1433.58 mins