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: 8 hours ago
TLE from 8 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 26125.29006560 .00000051 00000-0 74750-4 0 9996
2 01271 70.0798 249.5675 0018800 130.8209 250.1706 13.96653081112829Epoch: 2026-05-05T06:57Z
TLE epoch observation values (Epoch: 2026-05-05T06:57:41.667Z)
Latitude
19.50393°
Longitude
-70.68725°
Altitude
911.945 km
Speed
7.396 km/s
True Right ascension
17h 07m 36s
True Declination
19° 23' 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
22:45:12
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
917.132 km
Perigee altitude
889.753 km
Semi-major axis
7,281.579 km
Eccentricity
0.00188
Inclination
70.0798°
RAAN
249.5675°
Arg. of periapsis
130.8209°
True anomaly
249.9681°
Mean anomaly
250.1706°
Eccentric anomaly
250.06934°
Mean motion
3.49305 °/min
Orbital period
103.06 mins
BSTAR
0.00007475
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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 | 2026-05-05 17:43:43.379Z | 15.683° NNE | 2026-05-05 17:46:43.379Z | 49.332° ENE | 15.988° | 2026-05-05 17:49:43.379Z | 82.109° E |
| 10 mins | 2026-05-05 19:28:43.379Z | 333.866° NNW | 2026-05-05 19:32:43.379Z | 291.366° WNW | 44.759° | 2026-05-05 19:38:43.379Z | 159.794° S |
| 8 mins | 2026-05-06 08:46:43.379Z | 155.751° SSE | 2026-05-06 08:49:43.379Z | 112.239° ESE | 29.133° | 2026-05-06 08:54:43.379Z | 45.536° ENE |
| 9 mins | 2026-05-06 10:31:43.379Z | 245.659° WSW | 2026-05-06 10:35:43.379Z | 306.605° NW | 30.573° | 2026-05-06 10:40:43.379Z | 7.795° 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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