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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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
OCT CYL + DOME + ANT, 7.5 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 20 hours ago
TLE from 20 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A 26208.25911465 -.00000025 00000-0 29559-3 0 9996
2 01726 59.3860 298.9886 0711709 247.1717 136.7266 11.97078040654466Epoch: 2026-07-27T06:13Z
TLE epoch observation values (Epoch: 2026-07-27T06:13:07.505Z)
Latitude
24.82024°
Longitude
-83.42862°
Altitude
2,131.498 km
Speed
6.66 km/s
True Right ascension
20h 59m 11s
True Declination
24° 42' 38"
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
15:14:13
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,267.82 km
Perigee altitude
1,118.908 km
Semi-major axis
8,071.501 km
Eccentricity
0.07117
Inclination
59.386°
RAAN
298.9886°
Arg. of periapsis
247.1717°
True anomaly
141.96899°
Mean anomaly
136.7266°
Eccentric anomaly
139.38133°
Mean motion
2.99303 °/min
Orbital period
120.28 mins
BSTAR
0.00029559
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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. |
|---|---|---|---|---|---|---|---|
| 19 mins | 2026-07-28 06:10:41.642Z | 159.418° S | 2026-07-28 06:19:41.642Z | 106.453° ESE | 26.453° | 2026-07-28 06:29:41.642Z | 55.456° ENE |
| 23 mins | 2026-07-28 08:13:41.642Z | 218.241° SW | 2026-07-28 08:23:41.642Z | 249.824° W | 44.955° | 2026-07-28 08:36:41.642Z | 40.504° NE |
| 22 mins | 2026-07-28 10:21:41.642Z | 271.566° WNW | 2026-07-28 10:31:41.642Z | 333.517° NNW | 33.395° | 2026-07-28 10:43:41.642Z | 41.594° NE |
| 20 mins | 2026-07-28 12:31:41.642Z | 308.063° NW | 2026-07-28 12:41:41.642Z | 1.999° NNE | 27.352° | 2026-07-28 12:51:41.642Z | 60.751° ENE |
| 21 mins | 2026-07-28 14:40:41.642Z | 323.267° NNW | 2026-07-28 14:51:41.642Z | 36.493° NE | 37.026° | 2026-07-28 15:01:41.642Z | 106.19° ESE |
| 19 mins | 2026-07-28 16:47:41.642Z | 314.814° NW | 2026-07-28 16:57:41.642Z | 241.915° WSW | 42.335° | 2026-07-28 17:06:41.642Z | 160.758° S |
| 7 mins | 2026-07-28 18:57:41.642Z | 277.572° WNW | 2026-07-28 19:00:41.642Z | 260.359° W | 13.176° | 2026-07-28 19:04:41.642Z | 236.135° WSW |
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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