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TELSTAR 1, 340

Orbit data source: Space-Track

TELSTAR 1, 340 is a payload satellite owned by AT&T (US) in LEO that was launched on Tue, 10 Jul 1962 UTC via a THOR DELTA 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/340?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/340?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

340, 1962-029A

Orbit

LEO

Country

Related business

AT&T (US)

Manufacturer

AT&T/BTL

Mission

Spacecraft

Bus & Motor

TSX, Unknown motor

Mass

77 kg wet, 77 kg dry

Launch date (UTC)

1962-07-10 (64 years ago)

Launch vehicle

THOR DELTA

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 6 hours ago

TLE from 6 hours ago

0 TELSTAR 1
1   340U 62029A   26129.74709941  .00000042  00000-0  68910-3 0  9990
2   340  44.8050  31.5783 2426099  65.7821 340.4806  9.12891491128941

Epoch: 2026-05-09T17:55Z

TLE epoch observation values (Epoch: 2026-05-09T17:55:49.389Z)

Latitude

22.93051°

Longitude

-79.86953°

Altitude

1,174.736 km

Speed

8.024 km/s

True Right ascension

03h 46m 35s

True Declination

22° 48' 51"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

07:56:37

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,640.299 km

Perigee altitude

947.287 km

Semi-major axis

9,671.93 km

Eccentricity

0.24261

Inclination

44.805°

RAAN

31.5783°

Arg. of periapsis

65.7821°

True anomaly

327.66741°

Mean anomaly

340.4806°

Eccentric anomaly

334.49522°

Mean motion

2.28178 °/min

Orbital period

157.77 mins

BSTAR

0.0006891

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Other satellites on launch #29 in the year 1962 (1962-07-10 UTC)

DELTA 1 R/B, 341

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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TELSTAR 1 Visibility forecast

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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.
18 mins	2026-05-10 02:04:53.611Z	292.44° WNW	2026-05-10 02:10:53.611Z	240.581° WSW	44.947°	2026-05-10 02:22:53.611Z	117.719° SE
21 mins	2026-05-10 04:51:53.611Z	266.54° W	2026-05-10 04:57:53.611Z	221.242° SW	27.803°	2026-05-10 05:12:53.611Z	165.428° S
10 mins	2026-05-10 20:12:53.611Z	213.627° SW	2026-05-10 20:17:53.611Z	144.129° SSE	36.292°	2026-05-10 20:22:53.611Z	74.775° E
11 mins	2026-05-10 22:58:53.611Z	277.392° WNW	2026-05-10 23:02:53.611Z	338.153° N	40.335°	2026-05-10 23:09:53.611Z	73.606° E

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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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out TELSTAR 1, 340 on other resources

View TELSTAR 1, 340 on NASA - NSSDCA Website

View TELSTAR 1, 340 on Heavens-Above

View TELSTAR 1, 340 on Keep Track

View TELSTAR 1, 340 on Celestrak

View TELSTAR 1, 340 on Gunter's Space Page

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

TELSTAR 1, 340

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-05-09T17:55:49.389Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #29 in the year 1962 (1962-07-10 UTC)

TELSTAR 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out TELSTAR 1, 340 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago