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: 10 hours ago
TLE from 10 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 26174.93090874 .00000041 00000-0 67159-4 0 9996
2 01271 70.0783 143.7387 0018511 56.5804 11.4875 13.96661012119759Epoch: 2026-06-23T22:20Z
TLE epoch observation values (Epoch: 2026-06-23T22:20:30.515Z)
Latitude
60.84521°
Longitude
-63.22256°
Altitude
901.946 km
Speed
7.414 km/s
True Right ascension
12h 15m 59s
True Declination
60° 42' 06"
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
19:41:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
916.894 km
Perigee altitude
889.936 km
Semi-major axis
7,281.552 km
Eccentricity
0.00185
Inclination
70.0783°
RAAN
143.7387°
Arg. of periapsis
56.5804°
True anomaly
11.52984°
Mean anomaly
11.4875°
Eccentric anomaly
11.50866°
Mean motion
3.49307 °/min
Orbital period
103.06 mins
BSTAR
0.000067159
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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 | 2026-06-24 08:53:40.787Z | 340.443° N | 2026-06-24 08:58:40.787Z | 63.958° ENE | 43.773° | 2026-06-24 09:03:40.787Z | 148.362° SSE |
| 5 mins | 2026-06-24 10:41:40.787Z | 281.869° WNW | 2026-06-24 10:43:40.787Z | 259.292° W | 15.028° | 2026-06-24 10:46:40.787Z | 228.049° WSW |
| 7 mins | 2026-06-24 22:12:40.787Z | 145.582° SSE | 2026-06-24 22:15:40.787Z | 107.708° ESE | 22.767° | 2026-06-24 22:19:40.787Z | 56.684° ENE |
| 10 mins | 2026-06-24 23:56:40.787Z | 230.382° WSW | 2026-06-25 00:01:40.787Z | 314.296° NW | 35.849° | 2026-06-25 00:06:40.787Z | 12.995° NNE |
| 5 mins | 2026-06-25 07:14:40.787Z | 25.629° NE | 2026-06-25 07:16:40.787Z | 49.248° ENE | 16.292° | 2026-06-25 07:19:40.787Z | 82.107° E |
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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