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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1271 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
NRL 24", Unknown motor
Mass
48 kg wet, 48 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 25340.33681779 .00000125 00000-0 12758-3 0 9991
2 01271 70.0787 209.2544 0022611 317.3925 152.0590 13.96618265 91885Epoch: 2025-12-06T08:05Z
TLE epoch observation values (Epoch: 2025-12-06T08:05:01.057Z)
Latitude
62.46176°
Longitude
148.89066°
Altitude
930.201 km
Speed
7.385 km/s
True Right ascension
23h 02m 02s
True Declination
62° 19' 26"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
11:12:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
920.028 km
Perigee altitude
887.099 km
Semi-major axis
7,281.701 km
Eccentricity
0.00226
Inclination
70.0787°
RAAN
209.2544°
Arg. of periapsis
317.3925°
True anomaly
152.1801°
Mean anomaly
152.059°
Eccentric anomaly
152.11958°
Mean motion
3.49296 °/min
Orbital period
103.06 mins
BSTAR
0.00012758
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Other satellites on launch #16 in the year 1965 (1965-03-09 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.OPS 4988 (GREB 6) Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-12-06 16:15:36.742Z | 174.555° S | 2025-12-06 16:20:36.742Z | 111.834° ESE | 33.916° | 2025-12-06 16:25:36.742Z | 40.885° NE |
| 9 mins | 2025-12-06 18:02:36.742Z | 252.69° W | 2025-12-06 18:06:36.742Z | 307.456° NW | 26.681° | 2025-12-06 18:11:36.742Z | 5.256° NNE |
| 8 mins | 2025-12-07 01:18:36.742Z | 7.379° NNE | 2025-12-07 01:22:36.742Z | 60.713° ENE | 23.967° | 2025-12-07 01:26:36.742Z | 106.255° ESE |
| 10 mins | 2025-12-07 03:03:36.742Z | 320.703° NNW | 2025-12-07 03:07:36.742Z | 264.883° W | 37.47° | 2025-12-07 03:13:36.742Z | 178.415° S |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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