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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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ISO8601 Format

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 (59 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

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 SECOR 8 (EGRS 8)
1 02520U 66089B   26037.38280107 -.00000002  00000-0 -17092-2 0  9990
2 02520  89.8349  32.1973 0015302  79.5836 280.6739  8.58894188370729

Epoch: 2026-02-06T09:11Z

TLE epoch observation values (Epoch: 2026-02-06T09:11:14.012Z)

Latitude

-0.00001°

Longitude

117.86745°

Altitude

3,693.054 km

Speed

6.293 km/s

True Right ascension

02h 08m 47s

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

15:40:28

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,706.93 km

Perigee altitude

3,676.113 km

Semi-major axis

10,069.658 km

Eccentricity

0.00153

Inclination

89.8349°

RAAN

32.1973°

Arg. of periapsis

79.5836°

True anomaly

280.50153°

Mean anomaly

280.6739°

Eccentric anomaly

280.58772°

Mean motion

2.14793 °/min

Orbital period

167.6 mins

BSTAR

-0.0017092

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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	2026-02-07 13:55:13.079Z	351.668° N	2026-02-07 14:10:13.079Z	297.086° NW	28.612°	2026-02-07 14:25:13.079Z	242.263° WSW
29 mins	2026-02-07 21:39:13.079Z	117.785° SE	2026-02-07 21:53:13.079Z	62.634° ENE	30.059°	2026-02-07 22:08:13.079Z	7.844° NNE
36 mins	2026-02-08 00:20:13.079Z	189.551° SSW	2026-02-08 00:37:13.079Z	265.109° W	43.059°	2026-02-08 00:56:13.079Z	356.163° N
15 mins	2026-02-08 03:24:13.079Z	283.429° WNW	2026-02-08 03:31:13.079Z	307.307° NW	13.455°	2026-02-08 03:39:13.079Z	334.11° NNW
31 mins	2026-02-08 09:31:13.079Z	14.205° NNE	2026-02-08 09:46:13.079Z	73.399° E	29.395°	2026-02-08 10:02:13.079Z	134.006° SE
36 mins	2026-02-08 12:17:13.079Z	357.936° N	2026-02-08 12:34:13.079Z	287.549° WNW	43.057°	2026-02-08 12:53:13.079Z	202.623° SW

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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: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-02-06T09:11:14.012Z)

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: 1 day ago