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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). Payloads include a variety of satellites, spacecraft, and rockets 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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Identifier	1271, 1965-016A
Orbit	LEO
Last TLE update	16 hours ago
Origin	NRO/NRL (US)
Manufacturer	NRL
Mission	Defense Sigint
Bus & Motor	NRL 24", Unknown motor
Mass	48 kg wet, 48 kg dry
Launch date (UTC)	1965-03-09 (60 years ago)
Launch vehicle	THOR SLV-2 AGENA D
Launch site	Air Force Western Test Range (AFWTR)
Object type	Payload Rocket body Debris
Shape & HBR	Sphere, 0.5 m
Radar Cross Section	0.196 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 16 hours ago

0 OPS 4988 (GREB 6)
1 01271U 65016A   25081.35350635  .00000327  00000-0  27366-3 0  9994
2 01271  70.0803  41.3261 0023046 300.0222 179.2176 13.96548884 55720

Epoch: 2025-03-22T08:29Z

Definitive object data (Epoch: 2025-03-22T08:29:02.948Z)

Latitude	55.23141°
Longitude	-117.32031°
Altitude	931.109 km
Speed	7.383 km/s
True Right ascension	12h 40m 10s
True Declination	55° 04' 26"
Sunlit	Object was in full shadow at TLE epoch

Visualization TLE readout

Latitude	-63.90925°
Longitude	45.11536°
Altitude	913.152 km
Speed	7.403 km/s
Apparent Right ascension	19h 55m 34s
Apparent Declination	-60° 12' 02"
Sunlit	Object is in daylight

Visualization observer readout

Local Sidereal Time	05:48:05
Azimuth	213.613° SW
Elevation	-61.705°
Doppler factor	1

Orbital elements

Apogee altitude	920.587 km
Perigee altitude	887.023 km
Semi-major axis	7,281.942 km
Eccentricity	0.0023046
Inclination	70.0803°
RAAN	41.3261°
Arg. of periapsis	300.0222°
True anomaly	179.2212°
Mean anomaly	179.2176°
Eccentric anomaly	179.2194°
Mean motion	3.49279 °/min
BSTAR	0.00027366
Orbital period	103.07 mins

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Other satellites on launch #16 in the year 1965 (1965-03-09 UTC)

SURCAL 2, 1310 (Decayed)

PORCUPINE 1, 1272

THOR AGENA D R/B, 1245

OPS 4988 DEB, 12099

GGSE 3 DEB, 44043

OPS 4988 (GREB 6) Visibility forecast

Observer location: undefined°, undefined°

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.
8 mins	2025-03-23 06:48:29.841Z	7.352° NNE	2025-03-23 06:52:29.841Z	53° ENE	19.559°	2025-03-23 06:56:29.841Z	96.176° ESE
10 mins	2025-03-23 08:33:29.841Z	329.128° NNW	2025-03-23 08:38:29.841Z	243.972° WSW	42.972°	2025-03-23 08:43:29.841Z	168.761° S
9 mins	2025-03-23 21:51:29.841Z	168.524° S	2025-03-23 21:55:29.841Z	104.481° ESE	34.222°	2025-03-23 22:00:29.841Z	39.625° NE
8 mins	2025-03-23 23:37:29.841Z	255.059° W	2025-03-23 23:41:29.841Z	312.245° NW	26.5°	2025-03-23 23:45:29.841Z	0.707° NNE

Authenticating...

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Check out OPS 4988 (GREB 6), 1271 on other resources

View OPS 4988 (GREB 6), 1271 on NASA - NSSDCA Website

View OPS 4988 (GREB 6), 1271 on Heavens-Above

View OPS 4988 (GREB 6), 1271 on Keep Track

View OPS 4988 (GREB 6), 1271 on Celestrak

View OPS 4988 (GREB 6), 1271 on Gunter's Space Page

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