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SYNCOM 3, 858

Orbit data source: Space-Track

SYNCOM 3, 858 is a payload satellite owned by GSFC (US) in GEO that was launched on Wed, 19 Aug 1964 UTC via a THOR DELTA 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.

Not visible in the next 10 days

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Iframe URL

https://www.satcat.com/sats-embedded/858?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

858, 1964-047A

Orbit

GEO

Last TLE update

2 weeks ago

Origin

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Hughes

Mission

Non-operational Civil Communications

Bus & Motor

HS-301, SR-12-1

Mass

66 kg wet, 33 kg dry

Launch date (UTC)

1964-08-19 (61 years ago)

Launch vehicle

THOR DELTA D

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 0.4 m

Radar Cross Section

0.415 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 2 weeks ago

0 SYNCOM 3
1 00858U 64047A   25188.37961380 -.00000103  00000-0  00000-0 0  9998
2 00858   6.1211  68.0100 0003632 138.1442 201.2599  1.00313022 50001

Epoch: 2025-07-07T09:06Z

TLE epoch observation values (Epoch: 2025-07-07T09:06:38.632Z)

Latitude

-2.14661°

Longitude

-14.74043°

Altitude

35,789.071 km

Speed

3.074 km/s

True Right ascension

03h 10m 02s

True Declination

-2° 08' 40"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

6.01706°

Longitude

82.60255°

Altitude

35,766.84 km

Speed

3.076 km/s

Apparent Right ascension

10h 05m 57s

Apparent Declination

0° 27' 48"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

03:31:29

Azimuth

84.091° E

Elevation

-6.299°

Doppler factor

Orbital elements

Apogee altitude

35,791.402 km

Perigee altitude

35,760.781 km

Semi-major axis

42,154.229 km

Eccentricity

0.00036

Inclination

6.1211°

RAAN

68.01°

Arg. of periapsis

138.1442°

True anomaly

201.24482°

Mean anomaly

201.2599°

Eccentric anomaly

201.25236°

Mean motion

0.25077 °/min

Orbital period

1,435.56 mins

BSTAR

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Other satellites on launch #47 in the year 1964 (1964-08-19 UTC)

DELTA 1 R/B, 862

SYNCOM 3 Visibility

Observer location: undefined°, undefined°

SYNCOM 3 is likely not visible in the next few days

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858 neighbors

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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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Check out SYNCOM 3, 858 on other resources

View SYNCOM 3, 858 on NASA - NSSDCA Website

View SYNCOM 3, 858 on Heavens-Above

View SYNCOM 3, 858 on Keep Track

View SYNCOM 3, 858 on Celestrak

View SYNCOM 3, 858 on Gunter's Space Page

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