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: 10 hours ago
TLE from 10 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 26305.21974234 .00000019 00000-0 51390-4 0 9999
2 01271 70.0798 225.9578 0023434 251.8623 258.4547 13.96678671137948Epoch: 2026-11-01T05:16Z
TLE epoch observation values (Epoch: 2026-11-01T05:16:25.738Z)
Latitude
28.04285°
Longitude
-84.73466°
Altitude
911.63 km
Speed
7.397 km/s
True Right ascension
02h 19m 32s
True Declination
27° 54' 12"
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
11:06:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
920.417 km
Perigee altitude
886.29 km
Semi-major axis
7,281.49 km
Eccentricity
0.00234
Inclination
70.0798°
RAAN
225.9578°
Arg. of periapsis
251.8623°
True anomaly
258.19175°
Mean anomaly
258.4547°
Eccentric anomaly
258.32321°
Mean motion
3.49311 °/min
Orbital period
103.06 mins
BSTAR
0.00005139
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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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-11-01 20:08:11.391Z | 194.995° SSW | 2026-11-01 20:13:11.391Z | 144.192° SSE | 72.332° | 2026-11-01 20:19:11.391Z | 28.138° NE |
| 6 mins | 2026-11-01 21:57:11.391Z | 280.177° WNW | 2026-11-01 22:00:11.391Z | 316.266° NNW | 19.341° | 2026-11-01 22:03:11.391Z | 349.186° N |
| 9 mins | 2026-11-02 05:11:11.391Z | 355.163° N | 2026-11-02 05:15:11.391Z | 53.796° ENE | 42.482° | 2026-11-02 05:20:11.391Z | 126.122° SE |
| 8 mins | 2026-11-02 06:57:11.391Z | 303.952° NW | 2026-11-02 07:01:11.391Z | 248.1° W | 28.693° | 2026-11-02 07:05:11.391Z | 201.994° SSW |
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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