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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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
SPHERE, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 11 hours ago
TLE from 11 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 26271.25818875 .00000009 00000-0 44564-4 0 9997
2 01271 70.0788 298.3701 0023471 291.2817 143.8818 13.96673859133209Epoch: 2026-09-28T06:11Z
TLE epoch observation values (Epoch: 2026-09-28T06:11:47.508Z)
Latitude
65.53659°
Longitude
-109.20487°
Altitude
929.876 km
Speed
7.386 km/s
True Right ascension
23h 23m 07s
True Declination
65° 24' 35"
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
10:37:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
920.461 km
Perigee altitude
886.28 km
Semi-major axis
7,281.507 km
Eccentricity
0.00235
Inclination
70.0788°
RAAN
298.3701°
Arg. of periapsis
291.2817°
True anomaly
144.03996°
Mean anomaly
143.8818°
Eccentric anomaly
143.96092°
Mean motion
3.4931 °/min
Orbital period
103.06 mins
BSTAR
0.000044564
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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 | 2026-09-29 02:33:50.124Z | 172.066° S | 2026-09-29 02:38:50.124Z | 114.212° SE | 38.647° | 2026-09-29 02:43:50.124Z | 43.341° NE |
| 9 mins | 2026-09-29 04:20:50.124Z | 249.238° W | 2026-09-29 04:24:50.124Z | 305.172° NW | 32.92° | 2026-09-29 04:29:50.124Z | 5.595° NNE |
| 8 mins | 2026-09-29 11:36:50.124Z | 7.307° NNE | 2026-09-29 11:40:50.124Z | 57.554° ENE | 24.588° | 2026-09-29 11:44:50.124Z | 102.692° ESE |
| 10 mins | 2026-09-29 13:21:50.124Z | 323.698° NNW | 2026-09-29 13:26:50.124Z | 234.59° WSW | 54.922° | 2026-09-29 13:31:50.124Z | 175.628° 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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