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: 1 day ago
TLE from 1 day ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 26135.24679531 .00000013 00000-0 47229-4 0 9995
2 01271 70.0797 228.3413 0018437 116.2186 273.6421 13.96654483114217Epoch: 2026-05-15T05:55Z
TLE epoch observation values (Epoch: 2026-05-15T05:55:23.114Z)
Latitude
27.76835°
Longitude
-82.54396°
Altitude
907.389 km
Speed
7.401 km/s
True Right ascension
15h 57m 07s
True Declination
27° 37' 47"
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
19:30:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
916.863 km
Perigee altitude
890.013 km
Semi-major axis
7,281.575 km
Eccentricity
0.00184
Inclination
70.0797°
RAAN
228.3413°
Arg. of periapsis
116.2186°
True anomaly
273.43122°
Mean anomaly
273.6421°
Eccentric anomaly
273.53666°
Mean motion
3.49305 °/min
Orbital period
103.06 mins
BSTAR
0.000047229
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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 | 2026-05-16 16:43:16.922Z | 345.741° N | 2026-05-16 16:48:16.922Z | 72.508° E | 40.221° | 2026-05-16 16:53:16.922Z | 140.046° SSE |
| 6 mins | 2026-05-16 18:30:16.922Z | 293.059° NW | 2026-05-16 18:33:16.922Z | 256.519° W | 18.815° | 2026-05-16 18:36:16.922Z | 221.709° SW |
| 6 mins | 2026-05-17 06:03:16.922Z | 128.767° SE | 2026-05-17 06:05:16.922Z | 104.304° ESE | 18.588° | 2026-05-17 06:09:16.922Z | 59.278° ENE |
| 10 mins | 2026-05-17 07:46:16.922Z | 222.121° SW | 2026-05-17 07:50:16.922Z | 283.899° WNW | 40.553° | 2026-05-17 07:56:16.922Z | 17.157° NNE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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