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
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 16 hours ago
TLE from 16 hours ago
0 OPS 4988 (GREB 6)
1 1271U 65016A 26091.07337672 .00000085 00000-0 98627-4 0 9991
2 1271 70.0806 322.5202 0020662 178.3746 288.1967 13.96646680108045Epoch: 2026-04-01T01:45Z
TLE epoch observation values (Epoch: 2026-04-01T01:45:39.748Z)
Latitude
64.54965°
Longitude
-122.57663°
Altitude
911.285 km
Speed
7.405 km/s
True Right ascension
06h 13m 07s
True Declination
64° 25' 08"
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
23:00:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
918.51 km
Perigee altitude
888.419 km
Semi-major axis
7,281.602 km
Eccentricity
0.00207
Inclination
70.0806°
RAAN
322.5202°
Arg. of periapsis
178.3746°
True anomaly
287.97159°
Mean anomaly
288.1967°
Eccentric anomaly
288.08416°
Mean motion
3.49303 °/min
Orbital period
103.06 mins
BSTAR
0.000098627
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-04-01 18:38:44.582Z | 277.828° WNW | 2026-04-01 18:41:44.582Z | 308.815° NW | 15.426° | 2026-04-01 18:44:44.582Z | 341.966° N |
| 10 mins | 2026-04-02 01:52:44.582Z | 348.398° N | 2026-04-02 01:57:44.582Z | 70.974° E | 37.839° | 2026-04-02 02:02:44.582Z | 135.661° SSE |
| 7 mins | 2026-04-02 03:39:44.582Z | 294.987° NW | 2026-04-02 03:42:44.582Z | 256.067° W | 21.184° | 2026-04-02 03:46:44.582Z | 210.612° SW |
| 5 mins | 2026-04-02 15:12:44.582Z | 125.567° SE | 2026-04-02 15:14:44.582Z | 102.787° ESE | 16.653° | 2026-04-02 15:17:44.582Z | 68.972° E |
| 10 mins | 2026-04-02 16:55:44.582Z | 216.985° SW | 2026-04-02 16:59:44.582Z | 284.576° WNW | 42.711° | 2026-04-02 17:05:44.582Z | 19.335° NNE |
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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