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: 7 hours ago
TLE from 7 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 26035.27480807 .00000081 00000-0 96007-4 0 9996
2 01271 70.0787 81.4776 0023530 247.3374 182.7243 13.96634730100255Epoch: 2026-02-04T06:35Z
TLE epoch observation values (Epoch: 2026-02-04T06:35:43.417Z)
Latitude
62.20381°
Longitude
-108.7477°
Altitude
932.653 km
Speed
7.383 km/s
True Right ascension
08h 18m 30s
True Declination
62° 03' 54"
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
16:01:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
920.64 km
Perigee altitude
886.373 km
Semi-major axis
7,281.643 km
Eccentricity
0.00235
Inclination
70.0787°
RAAN
81.4776°
Arg. of periapsis
247.3374°
True anomaly
182.71152°
Mean anomaly
182.7243°
Eccentric anomaly
182.71791°
Mean motion
3.493 °/min
Orbital period
103.06 mins
BSTAR
0.000096007
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-02-04 15:28:06.599Z | 301.855° NW | 2026-02-04 15:32:06.599Z | 255.984° W | 19.9° | 2026-02-04 15:36:06.599Z | 212.746° SW |
| 6 mins | 2026-02-05 03:02:06.599Z | 125.501° SE | 2026-02-05 03:04:06.599Z | 101.257° ESE | 18.205° | 2026-02-05 03:08:06.599Z | 58.424° ENE |
| 10 mins | 2026-02-05 04:45:06.599Z | 221.068° SW | 2026-02-05 04:49:06.599Z | 293.572° NW | 41.621° | 2026-02-05 04:55:06.599Z | 18.226° NNE |
| 4 mins | 2026-02-05 12:03:06.599Z | 29.914° NE | 2026-02-05 12:04:06.599Z | 40.562° NE | 13.259° | 2026-02-05 12:07:06.599Z | 71.516° E |
| 10 mins | 2026-02-05 13:46:06.599Z | 339.92° N | 2026-02-05 13:51:06.599Z | 66.376° ENE | 44.066° | 2026-02-05 13:56:06.599Z | 149.497° SSE |
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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