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: 13 hours ago
TLE from 13 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A 25358.27833216 -.00000108 00000-0 -18939-3 0 9993
2 01726 59.3804 62.2561 0720077 106.5542 323.6691 11.97073836628725Epoch: 2025-12-24T06:40Z
TLE epoch observation values (Epoch: 2025-12-24T06:40:47.898Z)
Latitude
51.35805°
Longitude
-83.55688°
Altitude
1,248.573 km
Speed
7.436 km/s
True Right ascension
07h 18m 46s
True Declination
51° 12' 04"
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
18:34:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,274.595 km
Perigee altitude
1,112.172 km
Semi-major axis
8,071.52 km
Eccentricity
0.07201
Inclination
59.3804°
RAAN
62.2561°
Arg. of periapsis
106.5542°
True anomaly
318.40712°
Mean anomaly
323.6691°
Eccentric anomaly
321.077°
Mean motion
2.99302 °/min
Orbital period
120.28 mins
BSTAR
-0.00018939
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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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2025-12-25 04:28:40.562Z | 152.718° SSE | 2025-12-25 04:34:40.562Z | 112.26° ESE | 17.897° | 2025-12-25 04:39:40.562Z | 73.924° E |
| 15 mins | 2025-12-25 06:30:40.562Z | 215.809° SW | 2025-12-25 06:38:40.562Z | 177.639° S | 44.895° | 2025-12-25 06:45:40.562Z | 40.975° NE |
| 10 mins | 2025-12-25 08:39:40.562Z | 281.617° WNW | 2025-12-25 08:44:40.562Z | 329.634° NNW | 25.082° | 2025-12-25 08:49:40.562Z | 21.412° NNE |
| 6 mins | 2025-12-25 10:49:40.562Z | 334.721° NNW | 2025-12-25 10:52:40.562Z | 2.565° NNE | 15.094° | 2025-12-25 10:55:40.562Z | 30.567° NE |
| 10 mins | 2025-12-25 12:55:40.562Z | 340.625° N | 2025-12-25 12:59:40.562Z | 25.165° NE | 26.506° | 2025-12-25 13:05:40.562Z | 89.66° E |
| 12 mins | 2025-12-25 15:00:40.562Z | 311.86° NW | 2025-12-25 15:05:40.562Z | 226.211° WSW | 42.772° | 2025-12-25 15:12:40.562Z | 154.093° SSE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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