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SECOR 8 (EGRS 8), 2520

Orbit data source: Space-Track

SECOR 8 (EGRS 8), 2520 is an American payload satellite in LEO that was launched on Wed, 05 Oct 1966 UTC via an ATLAS SLV-3 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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https://www.satcat.com/sats-embedded/2520?theme=dark&initialShowStats=false

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Identifier

2520, 1966-089B

Orbit

LEO

Country

Related business

United States Army (US)

Manufacturer

ITT

Mission

Spacecraft

Bus & Motor

SECOR, Unknown motor

Mass

18 kg wet, 18 kg dry

Launch date (UTC)

1966-10-05 (60 years ago)

Launch vehicle

ATLAS SLV-3 AGENA D

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

BOX, 0.3 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 3 days ago

TLE from 3 days ago

0 SECOR 8 (EGRS 8)
1 02520U 66089B   26251.33205373 -.00000006  00000-0 -38891-2 0  9999
2 02520  89.8548  31.0075 0014305 224.2583 135.7125  8.58893946389091

Epoch: 2026-09-08T07:58Z

TLE epoch observation values (Epoch: 2026-09-08T07:58:09.442Z)

Latitude

0.00004°

Longitude

-75.93183°

Altitude

3,706.213 km

Speed

6.284 km/s

True Right ascension

02h 04m 01s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

14:40:10

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,705.928 km

Perigee altitude

3,677.118 km

Semi-major axis

10,069.66 km

Eccentricity

0.00143

Inclination

89.8548°

RAAN

31.0075°

Arg. of periapsis

224.2583°

True anomaly

135.82681°

Mean anomaly

135.7125°

Eccentric anomaly

135.76967°

Mean motion

2.14793 °/min

Orbital period

167.6 mins

BSTAR

-0.0038891

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Other satellites on launch #89 in the year 1966 (1966-10-05 UTC)

OPS 1920, 2481

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SECOR 8 (EGRS 8) 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.
30 mins	2026-09-10 22:20:47.583Z	351.806° N	2026-09-10 22:32:47.583Z	279.299° WNW	65.392°	2026-09-10 22:50:47.583Z	205.929° SW
14 mins	2026-09-11 01:06:47.583Z	335.726° NNW	2026-09-11 01:12:47.583Z	315.435° NNW	14.701°	2026-09-11 01:20:47.583Z	288.581° WNW
16 mins	2026-09-11 06:09:47.583Z	71.279° E	2026-09-11 06:16:47.583Z	47.661° ENE	15.298°	2026-09-11 06:25:47.583Z	17.782° NNE
35 mins	2026-09-11 08:40:47.583Z	154.246° SSE	2026-09-11 08:57:47.583Z	78.715° E	66.908°	2026-09-11 09:15:47.583Z	2.129° NNE
32 mins	2026-09-11 11:30:47.583Z	225.848° WSW	2026-09-11 11:45:47.583Z	284.431° WNW	36.056°	2026-09-11 12:02:47.583Z	349.638° N
14 mins	2026-09-11 17:54:47.583Z	30.609° NE	2026-09-11 18:01:47.583Z	54.01° ENE	12.99°	2026-09-11 18:08:47.583Z	77.245° E
37 mins	2026-09-11 20:36:47.583Z	4.681° NNE	2026-09-11 20:54:47.583Z	84.883° E	66.864°	2026-09-11 21:13:47.583Z	169.68° S

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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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Check out SECOR 8 (EGRS 8), 2520 on other resources

View SECOR 8 (EGRS 8), 2520 on NASA - NSSDCA Website

View SECOR 8 (EGRS 8), 2520 on Heavens-Above

View SECOR 8 (EGRS 8), 2520 on Keep Track

View SECOR 8 (EGRS 8), 2520 on Celestrak

View SECOR 8 (EGRS 8), 2520 on Gunter's Space Page

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

SECOR 8 (EGRS 8), 2520

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2026-09-08T07:58:09.442Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #89 in the year 1966 (1966-10-05 UTC)

SECOR 8 (EGRS 8) Visibility forecast

Co-orbital & Co-planar RSOs

Check out SECOR 8 (EGRS 8), 2520 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago