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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). 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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<iframe src="https://www.satcat.com/sats-embedded/1271?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/1271?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

1271, 1965-016A

Orbit

LEO

Last TLE update

6 hours ago

Origin

National Reconnaissance Office (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 6 hours ago

0 OPS 4988 (GREB 6)
1  1271U 65016A   25192.20423002  .00000007  00000-0  42577-4 0  9997
2  1271  70.0784 165.0339 0019864 165.3799 205.9729 13.96579484 71765

Epoch: 2025-07-11T04:54Z

TLE epoch observation values (Epoch: 2025-07-11T04:54:05.473Z)

Latitude

10.53149°

Longitude

165.99468°

Altitude

920.247 km

Speed

7.386 km/s

True Right ascension

11h 15m 30s

True Declination

10° 28' 16"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

40.06602°

Longitude

-36.01065°

Altitude

897.999 km

Speed

7.414 km/s

Apparent Right ascension

17h 53m 36s

Apparent Declination

18° 53' 29"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

22:57:24

Azimuth

276.277° WNW

Elevation

22.576°

Doppler factor

Orbital elements

Apogee altitude

918.163 km

Perigee altitude

889.234 km

Semi-major axis

7,281.836 km

Eccentricity

0.00199

Inclination

70.0784°

RAAN

165.0339°

Arg. of periapsis

165.3799°

True anomaly

Unknown

Mean anomaly

205.9729°

Eccentric anomaly

Unknown

Mean motion

3.49287 °/min

Orbital period

103.07 mins

BSTAR

0.000042577

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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.
5 mins	2025-07-11 10:39:29.861Z	275.921° WNW	2025-07-11 10:40:29.861Z	260.999° W	22.127°	2025-07-11 10:44:29.861Z	211.671° SW
5 mins	2025-07-11 22:11:29.861Z	118.431° SE	2025-07-11 22:13:29.861Z	95.25° ESE	15.746°	2025-07-11 22:16:29.861Z	64.197° ENE
10 mins	2025-07-11 23:53:29.861Z	213.901° SW	2025-07-11 23:58:29.861Z	327.919° NNW	42.821°	2025-07-12 00:03:29.861Z	19.571° NNE
10 mins	2025-07-12 08:55:29.861Z	344.22° N	2025-07-12 08:59:29.861Z	41.548° NE	42.019°	2025-07-12 09:05:29.861Z	145.52° SSE

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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

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.