Showing default

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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/503?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/503?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

503, 1962-068A

Orbit

Active

Last TLE update

7 hours ago

Origin

National Aeronautics and Space Administration (NASA) (US)

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 (62 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, 0.81 m

Radar Cross Section

0.652 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 7 hours ago

0 RELAY 1 (A-15)
1 00503U 62068A   25130.49083697 -.00000033  00000-0  00000-0 0  9994
2 00503  47.4985 220.2721 2843269  90.4052 312.6481  7.78159106774138

Epoch: 2025-05-10T11:46Z

Definitive object data (Epoch: 2025-05-10T11:46:48.314Z)

Latitude

9.59637°

Longitude

-176.0863°

Altitude

2,928.002 km

Speed

6.974 km/s

True Right ascension

15h 16m 35s

True Declination

9° 33' 11"

Sunlit

Object was in full shadow at TLE epoch

Visualization TLE readout

Latitude

43.36358°

Longitude

-64.74984°

Altitude

1,438.794 km

Speed

8.065 km/s

Apparent Right ascension

19h 11m 24s

Apparent Declination

13° 25' 38"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

02:41:49

Azimuth

294.962° NW

Elevation

-7.917°

Doppler factor

Orbital elements

Apogee altitude

7,438.427 km

Perigee altitude

1,320.949 km

Semi-major axis

10,757.825 km

Eccentricity

0.2843269

Inclination

47.4985°

RAAN

220.2721°

Arg. of periapsis

90.4052°

True anomaly

282.67516°

Mean anomaly

312.6481°

Eccentric anomaly

298.30518°

Mean motion

1.94517 °/min

BSTAR

Unknown

Orbital period

185.07 mins

Loading maneuver chart data...

Loading SW <> Apogee altitude chart data...

Loading historical data...

Other satellites on launch #68 in the year 1962 (1962-12-13 UTC)

DELTA 1 R/B, 515

RELAY 1 (A-15) 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.
15 mins	2025-05-10 18:35:04.242Z	259.052° W	2025-05-10 18:41:04.242Z	224.228° SW	17.033°	2025-05-10 18:50:04.242Z	191.296° SSW
17 mins	2025-05-11 06:12:04.242Z	174.382° S	2025-05-11 06:22:04.242Z	136.355° SSE	20.488°	2025-05-11 06:29:04.242Z	92.275° ESE
18 mins	2025-05-11 09:27:04.242Z	237.98° WSW	2025-05-11 09:38:04.242Z	64.717° ENE	44.857°	2025-05-11 09:45:04.242Z	61.421° ENE
14 mins	2025-05-11 12:47:04.242Z	294.642° NW	2025-05-11 12:53:04.242Z	9.561° NNE	38.375°	2025-05-11 13:01:04.242Z	84.473° E
18 mins	2025-05-11 16:02:04.242Z	288.59° WNW	2025-05-11 16:08:04.242Z	210.454° SW	40.026°	2025-05-11 16:20:04.242Z	143.689° SSE

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in ascending order

Check out RELAY 1 (A-15), 503 on other resources

View RELAY 1 (A-15), 503 on NASA - NSSDCA Website

View RELAY 1 (A-15), 503 on Heavens-Above

View RELAY 1 (A-15), 503 on Keep Track

View RELAY 1 (A-15), 503 on Celestrak

View RELAY 1 (A-15), 503 on Gunter's Space Page

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