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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1726 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
APL
Mission
Spacecraft
Bus & Motor
ANNA, Unknown motor
Mass
176 kg wet, 176 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 EXPLORER 29 (GEOS 1)
1 1726U 65089A 25312.58197868 -.00000069 00000-0 45629-4 0 9995
2 1726 59.3757 164.9971 0719917 76.8831 316.5178 11.97073963623253Epoch: 2025-11-08T13:58Z
TLE epoch observation values (Epoch: 2025-11-08T13:58:02.957Z)
Latitude
23.325°
Longitude
-77.81285°
Altitude
1,295.006 km
Speed
7.388 km/s
True Right ascension
11h 58m 50s
True Declination
23° 12' 32"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
20:33:33
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,274.466 km
Perigee altitude
1,112.301 km
Semi-major axis
8,071.52 km
Eccentricity
0.07199
Inclination
59.3757°
RAAN
164.9971°
Arg. of periapsis
76.8831°
True anomaly
310.45703°
Mean anomaly
316.5178°
Eccentric anomaly
313.5271°
Mean motion
2.99302 °/min
Orbital period
120.28 mins
BSTAR
0.000045629
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Other satellites on launch #89 in the year 1965 (1965-11-06 UTC)
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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.EXPLORER 29 (GEOS 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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2025-11-09 00:22:17.671Z | 321.914° NNW | 2025-11-09 00:29:17.671Z | 25.706° NE | 44.252° | 2025-11-09 00:38:17.671Z | 135.781° SSE |
| 11 mins | 2025-11-09 02:29:17.671Z | 286.63° WNW | 2025-11-09 02:34:17.671Z | 242.089° WSW | 22.098° | 2025-11-09 02:40:17.671Z | 198.588° SSW |
| 13 mins | 2025-11-09 16:00:17.671Z | 204.342° SW | 2025-11-09 16:07:17.671Z | 109.803° ESE | 42.4° | 2025-11-09 16:13:17.671Z | 45.86° ENE |
| 11 mins | 2025-11-09 18:07:17.671Z | 272.431° WNW | 2025-11-09 18:12:17.671Z | 326.551° NNW | 27.161° | 2025-11-09 18:18:17.671Z | 27.931° NE |
| 6 mins | 2025-11-09 20:17:17.671Z | 333.217° NNW | 2025-11-09 20:20:17.671Z | 2.063° NNE | 14.907° | 2025-11-09 20:23:17.671Z | 28.964° NE |
| 11 mins | 2025-11-09 22:23:17.671Z | 341.952° N | 2025-11-09 22:27:17.671Z | 23.905° NE | 24.267° | 2025-11-09 22:34:17.671Z | 85.749° E |
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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