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, 1.1 m
Radar Cross Section
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 26279.12245071 -.00000082 00000-0 -56304-4 0 9996
2 01726 59.3814 139.7215 0711207 293.7796 240.6874 11.97077756662945Epoch: 2026-10-06T02:56Z
TLE epoch observation values (Epoch: 2026-10-06T02:56:19.741Z)
Latitude
10.56319°
Longitude
-105.45951°
Altitude
2,005.024 km
Speed
6.764 km/s
True Right ascension
20h 53m 39s
True Declination
10° 30' 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
11:18:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,267.417 km
Perigee altitude
1,119.315 km
Semi-major axis
8,071.503 km
Eccentricity
0.07112
Inclination
59.3814°
RAAN
139.7215°
Arg. of periapsis
293.7796°
True anomaly
233.89378°
Mean anomaly
240.6874°
Eccentric anomaly
237.25986°
Mean motion
2.99303 °/min
Orbital period
120.28 mins
BSTAR
-0.000056304
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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. |
|---|---|---|---|---|---|---|---|
| 22 mins | 2026-10-06 18:07:15.973Z | 245.852° WSW | 2026-10-06 18:17:15.973Z | 325.529° NNW | 56.009° | 2026-10-06 18:29:15.973Z | 38.907° NE |
| 20 mins | 2026-10-06 20:17:15.973Z | 295.999° NW | 2026-10-06 20:26:15.973Z | 352.002° N | 31.873° | 2026-10-06 20:37:15.973Z | 49.993° ENE |
| 22 mins | 2026-10-06 22:26:15.973Z | 320.621° NNW | 2026-10-06 22:36:15.973Z | 19.495° NNE | 37.366° | 2026-10-06 22:48:15.973Z | 85.676° E |
| 24 mins | 2026-10-07 00:33:15.973Z | 321.693° NNW | 2026-10-07 00:45:15.973Z | 66.269° ENE | 75.795° | 2026-10-07 00:57:15.973Z | 133.397° SE |
| 21 mins | 2026-10-07 02:39:15.973Z | 307.221° NW | 2026-10-07 02:50:15.973Z | 244.701° WSW | 38.094° | 2026-10-07 03:00:15.973Z | 186.944° SSW |
| 5 mins | 2026-10-07 14:10:15.973Z | 111.822° ESE | 2026-10-07 14:12:15.973Z | 99.776° ESE | 12.018° | 2026-10-07 14:15:15.973Z | 82.795° E |
| 19 mins | 2026-10-07 16:07:15.973Z | 195.327° SSW | 2026-10-07 16:15:15.973Z | 117.948° SE | 62.49° | 2026-10-07 16:26:15.973Z | 44.669° NE |
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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