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OPS 3662 (VELA 3), 836

Orbit data source: Space-Track

OPS 3662 (VELA 3), 836 is a payload satellite owned by USAF SSD (US) in HEO that was launched on Fri, 17 Jul 1964 UTC via an ATLAS AGENA D launch vehicle from the Air Force Eastern Test Range (AFETR). 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/836?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

836, 1964-040A

Orbit

HEO

Country

Related business

United States Space Force (US)

Manufacturer

TRW

Mission

Spacecraft

Bus & Motor

VELA, BE-3

Mass

~227 kg wet, 125 kg dry

Launch date (UTC)

1964-07-17 (61 years ago)

Launch vehicle

ATLAS AGENA D

Launch site

Air Force Eastern Test Range (AFETR)

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: 3 days ago

TLE from 3 days ago

0 OPS 3662 (VELA 3)
1 00836U 64040A   25361.26835090  .00000779  00000-0  00000-0 0  9994
2 00836  52.1831 122.2924 4807737 282.3962   0.4268  0.23905195 10587

Epoch: 2025-12-27T06:26Z

TLE epoch observation values (Epoch: 2025-12-27T06:26:25.517Z)

Latitude

-50.17014°

Longitude

-138.51192°

Altitude

50,793.43 km

Speed

3.211 km/s

True Right ascension

03h 36m 21s

True Declination

-50° 08' 57"

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

21:40:41

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

156,013.162 km

Perigee altitude

50,563.605 km

Semi-major axis

109,666.521 km

Eccentricity

0.48077

Inclination

52.1831°

RAAN

122.2924°

Arg. of periapsis

282.3962°

True anomaly

1.38805°

Mean anomaly

0.4268°

Eccentric anomaly

0.82197°

Mean motion

0.05976 °/min

Orbital period

6,023.8 mins

BSTAR

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Other satellites on launch #40 in the year 1964 (1964-07-17 UTC)

OPS 3674 (VELA 4), 837

ERS 13, 838 (Decayed)

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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OPS 3662 (VELA 3) 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.
185 mins	2025-12-29 22:06:43.199Z	294.7° NW	2025-12-29 22:06:43.199Z	294.7° NW	32.247°	2025-12-30 01:11:43.199Z	309.997° NW
523 mins	2025-12-30 13:23:43.199Z	73.822° E	2025-12-30 19:33:43.199Z	163.531° S	38.662°	2025-12-30 22:06:43.199Z	212.016° 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 OPS 3662 (VELA 3), 836 on other resources

View OPS 3662 (VELA 3), 836 on NASA - NSSDCA Website

View OPS 3662 (VELA 3), 836 on Heavens-Above

View OPS 3662 (VELA 3), 836 on Keep Track

View OPS 3662 (VELA 3), 836 on Celestrak

View OPS 3662 (VELA 3), 836 on Gunter's Space Page

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

OPS 3662 (VELA 3), 836

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: 2025-12-27T06:26:25.517Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #40 in the year 1964 (1964-07-17 UTC)

OPS 3662 (VELA 3) Visibility forecast

Co-orbital & Co-planar RSOs

Check out OPS 3662 (VELA 3), 836 on other resources

Documentation

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