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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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Defense Sigint
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, 0.3 m
Radar Cross Section
0.196 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 7 hours ago
TLE from 7 hours ago
0 OPS 4988 (GREB 6)
1 01271U 65016A 25259.60057044 .00000019 00000-0 51714-4 0 9990
2 01271 70.0817 21.3640 0018275 66.0570 305.7233 13.96592462 80614Epoch: 2025-09-16T14:24Z
TLE epoch observation values (Epoch: 2025-09-16T14:24:49.286Z)
Latitude
10.86842°
Longitude
173.33852°
Altitude
899.427 km
Speed
7.407 km/s
True Right ascension
01h 41m 19s
True Declination
10° 48' 22"
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
13:57:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
916.961 km
Perigee altitude
890.346 km
Semi-major axis
7,281.79 km
Eccentricity
0.00183
Inclination
70.0817°
RAAN
21.364°
Arg. of periapsis
66.057°
True anomaly
305.55306°
Mean anomaly
305.7233°
Eccentric anomaly
305.6382°
Mean motion
3.4929 °/min
Orbital period
103.07 mins
BSTAR
0.000051714
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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 | 2025-09-17 09:22:47.512Z | 191.964° SSW | 2025-09-17 09:27:47.512Z | 123.442° SE | 42.962° | 2025-09-17 09:32:47.512Z | 30.707° NE |
| 6 mins | 2025-09-17 11:11:47.512Z | 281.105° WNW | 2025-09-17 11:13:47.512Z | 306.011° NW | 18.762° | 2025-09-17 11:17:47.512Z | 352.196° N |
| 9 mins | 2025-09-17 18:25:47.512Z | 359.074° N | 2025-09-17 18:29:47.512Z | 63.941° ENE | 32.324° | 2025-09-17 18:34:47.512Z | 125.666° SE |
| 8 mins | 2025-09-17 20:11:47.512Z | 302.205° NW | 2025-09-17 20:14:47.512Z | 258.865° W | 27.178° | 2025-09-17 20:19:47.512Z | 197.434° 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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