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
Civil Geodetic
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 + 1 Dome + 1 Rod, 7.5 m
Radar Cross Section
1.519 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 14 hours ago
TLE from 14 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A 25259.04013052 -.00000071 00000-0 32455-4 0 9994
2 01726 59.3782 285.3742 0718240 42.1001 339.9304 11.97070583616840Epoch: 2025-09-16T00:57Z
TLE epoch observation values (Epoch: 2025-09-16T00:57:47.276Z)
Latitude
16.23806°
Longitude
-74.43368°
Altitude
1,155.523 km
Speed
7.516 km/s
True Right ascension
19h 40m 59s
True Declination
16° 09' 03"
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
07:46:55
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,273.128 km
Perigee altitude
1,113.668 km
Semi-major axis
8,071.535 km
Eccentricity
0.07182
Inclination
59.3782°
RAAN
285.3742°
Arg. of periapsis
42.1001°
True anomaly
336.8485°
Mean anomaly
339.9304°
Eccentric anomaly
338.4166°
Mean motion
2.99302 °/min
Orbital period
120.28 mins
BSTAR
0.000032455
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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. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2025-09-17 03:02:08.283Z | 186.444° SSW | 2025-09-17 03:08:08.283Z | 118.427° SE | 33.764° | 2025-09-17 03:14:08.283Z | 53.36° ENE |
| 11 mins | 2025-09-17 05:08:08.283Z | 259.54° W | 2025-09-17 05:13:08.283Z | 327.456° NNW | 33.617° | 2025-09-17 05:19:08.283Z | 30.097° NE |
| 8 mins | 2025-09-17 07:17:08.283Z | 322.644° NNW | 2025-09-17 07:20:08.283Z | 351.376° N | 17.66° | 2025-09-17 07:25:08.283Z | 32.647° NE |
| 11 mins | 2025-09-17 09:24:08.283Z | 341.78° N | 2025-09-17 09:29:08.283Z | 29.783° NE | 23.283° | 2025-09-17 09:35:08.283Z | 73.684° E |
| 17 mins | 2025-09-17 11:28:08.283Z | 325.022° NNW | 2025-09-17 11:35:08.283Z | 43.274° NE | 43.349° | 2025-09-17 11:45:08.283Z | 130.461° SE |
| 15 mins | 2025-09-17 13:34:08.283Z | 294.218° NW | 2025-09-17 13:40:08.283Z | 243.714° WSW | 29.176° | 2025-09-17 13:49:08.283Z | 186.386° SSW |
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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