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SYNCOM 1, 553

Orbit data source: Space-Track

SYNCOM 1, 553 is a payload satellite owned by GSFC (US) that was launched on Thu, 14 Feb 1963 UTC via a THOR DELTA B 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 src="https://www.satcat.com/sats-embedded/553?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/553?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

553, 1963-004A

Orbit

Active

Last TLE update

1 week ago

Origin

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Hughes

Mission

Non-operational Civil Communications

Bus & Motor

HS-301, TE-M-375

Mass

68 kg wet, ~27 kg dry

Launch date (UTC)

1963-02-14 (62 years ago)

Launch vehicle

THOR DELTA B

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 0.71 m

Radar Cross Section

0.415 m²

Expand to show TLE details & history

TLE from 1 week ago

0 SYNCOM 1
1 00553U 63004A   25120.71661705 -.00000088  00000-0  00000-0 0  9996
2 00553  27.5701 281.2360 0788262 188.5400 169.9881  1.16483653 31258

Epoch: 2025-04-30T17:11Z

Definitive object data (Epoch: 2025-04-30T17:11:55.713Z)

Latitude

-0°

Longitude

164.30156°

Altitude

34,737.284 km

Speed

2.99 km/s

True Right ascension

18h 44m 43s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-10.29222°

Longitude

143.78442°

Altitude

34,270.667 km

Speed

3.028 km/s

Apparent Right ascension

17h 46m 40s

Apparent Declination

-16° 55' 15"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

13:51:58

Azimuth

123.569° SE

Elevation

11.227°

Doppler factor

Orbital elements

Apogee altitude

34,786.024 km

Perigee altitude

28,770.571 km

Semi-major axis

38,156.435 km

Eccentricity

0.0788262

Inclination

27.5701°

RAAN

281.236°

Arg. of periapsis

188.54°

True anomaly

171.41901°

Mean anomaly

169.9881°

Eccentric anomaly

170.71667°

Mean motion

0.2912 °/min

BSTAR

Unknown

Orbital period

1236.26 mins

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Other satellites on launch #4 in the year 1963 (1963-02-14 UTC)

DELTA 1 R/B, 532 (Decayed)

SYNCOM 1 Visibility forecast

Observer location: undefined°, undefined°

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.
663 mins	2025-05-09 05:43:15.117Z	123.582° SE	2025-05-09 11:28:15.117Z	95.087° ESE	32.469°	2025-05-09 16:46:15.117Z	96.193° ESE

Authenticating...

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Check out SYNCOM 1, 553 on other resources

View SYNCOM 1, 553 on NASA - NSSDCA Website

View SYNCOM 1, 553 on Heavens-Above

View SYNCOM 1, 553 on Keep Track

View SYNCOM 1, 553 on Celestrak

View SYNCOM 1, 553 on Gunter's Space Page

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