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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 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

8 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, 0.3 m

Radar Cross Section

0.196 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 8 hours ago

0 OPS 4988 (GREB 6)
1 01271U 65016A   25199.61491064  .00000046  00000-0  71070-4 0  9995
2 01271  70.0792 149.2374 0019430 155.0545  25.1338 13.96580658 72237

Epoch: 2025-07-18T14:45Z

TLE epoch observation values (Epoch: 2025-07-18T14:45:28.279Z)

Latitude

-0.37244°

Longitude

171.34001°

Altitude

895.218 km

Speed

7.411 km/s

True Right ascension

21h 57m 29s

True Declination

0° 22' 13"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

70.17438°

Longitude

79.86436°

Altitude

911.141 km

Speed

7.406 km/s

Apparent Right ascension

21h 41m 22s

Apparent Declination

32° 30' 32"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

11:42:50

Azimuth

25.869° NE

Elevation

-12.312°

Doppler factor

Orbital elements

Apogee altitude

917.843 km

Perigee altitude

889.546 km

Semi-major axis

7,281.831 km

Eccentricity

0.00194

Inclination

70.0792°

RAAN

149.2374°

Arg. of periapsis

155.0545°

True anomaly

25.22858°

Mean anomaly

25.1338°

Eccentric anomaly

25.18117°

Mean motion

3.49287 °/min

Orbital period

103.07 mins

BSTAR

0.00007107

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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.
4 mins	2025-07-19 05:56:18.652Z	29.206° NE	2025-07-19 05:57:18.652Z	40.12° NE	13.543°	2025-07-19 06:00:18.652Z	72.146° E
9 mins	2025-07-19 07:40:18.652Z	339.71° N	2025-07-19 07:44:18.652Z	65.773° ENE	44.564°	2025-07-19 07:49:18.652Z	152.088° SSE
8 mins	2025-07-19 20:58:18.652Z	147.931° SSE	2025-07-19 21:01:18.652Z	107.901° ESE	25.087°	2025-07-19 21:06:18.652Z	48.28° ENE
10 mins	2025-07-19 22:42:18.652Z	233.803° WSW	2025-07-19 22:47:18.652Z	312.376° NW	34.322°	2025-07-19 22:52:18.652Z	11.42° NNE

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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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.