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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   25183.38145451 -.00000128  00000-0  00000-0 0  9998
2 00553  27.4367 279.9601 0792596 190.6146 167.6705  1.16484263 31981

Epoch: 2025-07-02T09:09Z

TLE epoch observation values (Epoch: 2025-07-02T09:09:17.669Z)

Latitude

-0.00003°

Longitude

-138.00519°

Altitude

34,749.772 km

Speed

2.989 km/s

True Right ascension

18h 39m 55s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

7.98597°

Longitude

-122.4722°

Altitude

34,787.958 km

Speed

2.987 km/s

Apparent Right ascension

19h 45m 18s

Apparent Declination

2° 37' 11"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

19:18:09

Azimuth

168.893° S

Elevation

52.199°

Doppler factor

Orbital elements

Apogee altitude

34,802.421 km

Perigee altitude

28,753.914 km

Semi-major axis

38,156.305 km

Eccentricity

0.07926

Inclination

27.4367°

RAAN

279.9601°

Arg. of periapsis

190.6146°

True anomaly

Unknown

Mean anomaly

167.6705°

Eccentric anomaly

Unknown

Mean motion

0.2912 °/min

Orbital period

1,236.26 mins

BSTAR

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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.
696 mins	2025-07-09 07:08:42.772Z	168.898° S	2025-07-09 11:08:42.772Z	147.913° SSE	43.615°	2025-07-09 18:44:42.772Z	140.852° SSE
322 mins	2025-07-10 01:46:42.772Z	114.97° SE	2025-07-10 06:50:42.772Z	90.223° ESE	28.729°	2025-07-10 07:08:42.772Z	88.699° E

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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.