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OPS 4988 (GREB 6), 1271

Orbit data source: Space-Track

OPS 4988 (GREB 6), 1271 is an American payload satellite in LEO that was launched on Tue, 09 Mar 1965 UTC via a THOR SLV-2 AGENA D launch vehicle from the Air Force Western Test Range (AFWTR). 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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Identifier
1271, 1965-016A
Orbit
LEO
Last TLE update
6 hours ago
Origin
Manufacturer
NRL
Mission
Defense Sigint
Bus & Motor
NRL 24", Unknown motor
Mass
48 kg wet, 48 kg dry
Launch date (UTC)
1965-03-09 (60 years ago)
Launch vehicle
THOR SLV-2 AGENA D
Launch site
Air Force Western Test Range (AFWTR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Sphere, 0.5 m
Radar Cross Section
0.196 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 6 hours ago
0 OPS 4988 (GREB 6)
1  1271U 65016A   25192.20423002  .00000007  00000-0  42577-4 0  9997
2  1271  70.0784 165.0339 0019864 165.3799 205.9729 13.96579484 71765
Epoch: 2025-07-11T04:54Z
TLE epoch observation values (Epoch: 2025-07-11T04:54:05.473Z)
Latitude
10.53149°
Longitude
165.99468°
Altitude
920.247 km
Speed
7.386 km/s
True Right ascension
11h 15m 30s
True Declination
10° 28' 16"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
40.06602°
Longitude
-36.01065°
Altitude
897.999 km
Speed
7.414 km/s
Apparent Right ascension
17h 53m 36s
Apparent Declination
18° 53' 29"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
22:57:24
Azimuth
276.277° WNW
Elevation
22.576°
Doppler factor
1
Orbital elements
Apogee altitude
918.163 km
Perigee altitude
889.234 km
Semi-major axis
7,281.836 km
Eccentricity
0.00199
Inclination
70.0784°
RAAN
165.0339°
Arg. of periapsis
165.3799°
True anomaly
Unknown
Mean anomaly
205.9729°
Eccentric anomaly
Unknown
Mean motion
3.49287 °/min
Orbital period
103.07 mins
BSTAR
0.000042577
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OPS 4988 (GREB 6) Visibility forecast

Observer location: undefined°, undefined°

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.
5 mins2025-07-11 10:39:29.861Z275.921° WNW2025-07-11 10:40:29.861Z260.999° W22.127°2025-07-11 10:44:29.861Z211.671° SW
5 mins2025-07-11 22:11:29.861Z118.431° SE2025-07-11 22:13:29.861Z95.25° ESE15.746°2025-07-11 22:16:29.861Z64.197° ENE
10 mins2025-07-11 23:53:29.861Z213.901° SW2025-07-11 23:58:29.861Z327.919° NNW42.821°2025-07-12 00:03:29.861Z19.571° NNE
10 mins2025-07-12 08:55:29.861Z344.22° N2025-07-12 08:59:29.861Z41.548° NE42.019°2025-07-12 09:05:29.861Z145.52° SSE
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