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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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<iframe src="https://www.satcat.com/sats-embedded/2520?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

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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, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 SECOR 8 (EGRS 8)
1 02520U 66089B   26306.65380399 -.00000018  00000-0 -98578-2 0  9998
2 02520  89.8649  30.7312 0014892 168.1088 192.0117  8.58893610393843

Epoch: 2026-11-02T15:41Z

TLE epoch observation values (Epoch: 2026-11-02T15:41:28.664Z)

Latitude

-0.00002°

Longitude

113.43404°

Altitude

3,710.564 km

Speed

6.282 km/s

True Right ascension

02h 02m 55s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

09:49:39

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,706.521 km

Perigee altitude

3,676.53 km

Semi-major axis

10,069.663 km

Eccentricity

0.00149

Inclination

89.8649°

RAAN

30.7312°

Arg. of periapsis

168.1088°

True anomaly

191.97625°

Mean anomaly

192.0117°

Eccentric anomaly

191.99397°

Mean motion

2.14793 °/min

Orbital period

167.6 mins

BSTAR

-0.0098578

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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.
34 mins	2026-11-04 15:59:49.618Z	9.029° NNE	2026-11-04 16:16:49.618Z	74.928° E	40.188°	2026-11-04 16:33:49.618Z	142.29° SSE
35 mins	2026-11-04 18:47:49.618Z	356.415° N	2026-11-04 19:04:49.618Z	282.88° WNW	60.969°	2026-11-04 19:22:49.618Z	209.64° SW
11 mins	2026-11-04 21:39:49.618Z	333.268° NNW	2026-11-04 21:44:49.618Z	316.505° NNW	13.023°	2026-11-04 21:50:49.618Z	296.517° NW
17 mins	2026-11-05 02:40:49.618Z	76.64° E	2026-11-05 02:48:49.618Z	49.08° ENE	17.055°	2026-11-05 02:57:49.618Z	18.475° NNE
36 mins	2026-11-05 05:12:49.618Z	158.346° S	2026-11-05 05:29:49.618Z	85.245° E	71.513°	2026-11-05 05:48:49.618Z	1.209° NNE
31 mins	2026-11-05 08:03:49.618Z	230.263° WSW	2026-11-05 08:18:49.618Z	287.81° WNW	32.905°	2026-11-05 08:34:49.618Z	348.136° N

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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: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-11-02T15:41:28.664Z)

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: 2 days ago