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RELAY 1 (A-15), 503

Orbit data source: Space-Track

RELAY 1 (A-15), 503 is a payload satellite owned by GSFC (US) that was launched on Thu, 13 Dec 1962 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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Identifier
503, 1962-068A
Orbit
Active
Last TLE update
1 day ago
Origin
Manufacturer
RCA/East Windsor
Mission
Civil Communications
Bus & Motor
RELAY, Unknown motor
Mass
78 kg wet, 78 kg dry
Launch date (UTC)
1962-12-13 (63 years ago)
Launch vehicle
THOR DELTA B
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Oct Cyl, 0.4 m
Radar Cross Section
0.652 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 1 day ago
0 RELAY 1 (A-15)
1 00503U 62068A   25200.28621257 -.00000023  00000-0  00000-0 0  9998
2 00503  47.5012 130.9755 2839017 175.0273 355.3749  7.78158013779564
Epoch: 2025-07-19T06:52Z
TLE epoch observation values (Epoch: 2025-07-19T06:52:08.766Z)
Latitude
9.99547°
Longitude
-98.63136°
Altitude
1,343.831 km
Speed
8.137 km/s
True Right ascension
20h 06m 55s
True Declination
9° 56' 29"
Sunlit
Object was in full shadow at epoch
Visualization orbit readout
Latitude
29.34658°
Longitude
120.08389°
Altitude
5,986.558 km
Speed
5.239 km/s
Apparent Right ascension
10h 40m 31s
Apparent Declination
7° 09' 46"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
22:37:46
Azimuth
359.066° N
Elevation
-42.917°
Doppler factor
1
Orbital elements
Apogee altitude
7,433.865 km
Perigee altitude
1,325.53 km
Semi-major axis
10,757.835 km
Eccentricity
0.2839
Inclination
47.5012°
RAAN
130.9755°
Arg. of periapsis
175.0273°
True anomaly
351.36622°
Mean anomaly
355.3749°
Eccentric anomaly
353.54666°
Mean motion
1.94516 °/min
Orbital period
185.07 mins
BSTAR
0
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Other satellites on launch #68 in the year 1962 (1962-12-13 UTC)
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