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EXPLORER 29 (GEOS 1), 1726

Orbit data source: Space-Track

EXPLORER 29 (GEOS 1), 1726 is a payload satellite owned by GSFC (US) in LEO that was launched on Sat, 06 Nov 1965 UTC via a THOR DELTA E 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
1726, 1965-089A
Orbit
LEO
Last TLE update
7 hours ago
Origin
Manufacturer
APL
Mission
Civil Geodetic
Bus & Motor
ANNA, Unknown motor
Mass
176 kg wet, 176 kg dry
Launch date (UTC)
1965-11-06 (60 years ago)
Launch vehicle
THOR DELTA E
Launch site
Air Force Eastern Test Range (AFETR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Oct Cyl + 1 Dome + 1 Rod, 15 m
Radar Cross Section
1.519 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 7 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A   25181.87172049 -.00000072  00000-0  16283-4 0  9993
2 01726  59.3816  98.8456 0715143 351.7647  65.8723 11.97073127607602
Epoch: 2025-06-30T20:55Z
TLE epoch observation values (Epoch: 2025-06-30T20:55:16.65Z)
Latitude
51.59519°
Longitude
-86.16917°
Altitude
1,500.758 km
Speed
7.207 km/s
True Right ascension
09h 47m 18s
True Declination
51° 26' 36"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
-58.97798°
Longitude
123.52153°
Altitude
1,653.807 km
Speed
7.073 km/s
Apparent Right ascension
01h 56m 33s
Apparent Declination
-54° 18' 34"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
15:45:11
Azimuth
137.426° SSE
Elevation
-66.821°
Doppler factor
1
Orbital elements
Apogee altitude
2,270.616 km
Perigee altitude
1,116.157 km
Semi-major axis
8,071.524 km
Eccentricity
0.07151
Inclination
59.3816°
RAAN
98.8456°
Arg. of periapsis
351.7647°
True anomaly
Unknown
Mean anomaly
65.8723°
Eccentric anomaly
Unknown
Mean motion
2.99302 °/min
Orbital period
120.28 mins
BSTAR
0.000016283
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EXPLORER 29 (GEOS 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.
23 mins2025-07-01 05:09:46.416Z316.891° NNW2025-07-01 05:20:46.416Z218.473° SW44.051°2025-07-01 05:32:46.416Z153.123° SSE
15 mins2025-07-01 07:17:46.416Z290.255° WNW2025-07-01 07:24:46.416Z252.251° W20.293°2025-07-01 07:32:46.416Z212.147° SW
8 mins2025-07-01 18:46:46.416Z137.663° SSE2025-07-01 18:49:46.416Z109.234° ESE18.397°2025-07-01 18:54:46.416Z69.05° E
15 mins2025-07-01 20:47:46.416Z223.387° SW2025-07-01 20:53:46.416Z338.56° N44.71°2025-07-01 21:02:46.416Z39.703° NE
14 mins2025-07-01 22:54:46.416Z287.507° WNW2025-07-01 23:00:46.416Z343.635° N26.902°2025-07-01 23:08:46.416Z37.208° NE
15 mins2025-07-02 01:02:46.416Z321.308° NNW2025-07-02 01:09:46.416Z12.751° NNE23.874°2025-07-02 01:17:46.416Z60.502° ENE
21 mins2025-07-02 03:08:46.416Z326.224° NNW2025-07-02 03:17:46.416Z33.967° NE37.297°2025-07-02 03:29:46.416Z109.736° ESE
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