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
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 8 hours ago
TLE from 8 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A 26099.17599349 -.00000059 00000-0 93595-4 0 9997
2 01726 59.3801 184.1770 0716703 175.5942 206.2142 11.97075964641400Epoch: 2026-04-09T04:13Z
TLE epoch observation values (Epoch: 2026-04-09T04:13:25.837Z)
Latitude
15.80864°
Longitude
-67.00479°
Altitude
2,221.068 km
Speed
6.585 km/s
True Right ascension
12h 55m 07s
True Declination
15° 44' 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
18:26:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,271.862 km
Perigee altitude
1,114.886 km
Semi-major axis
8,071.511 km
Eccentricity
0.07167
Inclination
59.3801°
RAAN
184.177°
Arg. of periapsis
175.5942°
True anomaly
202.85887°
Mean anomaly
206.2142°
Eccentric anomaly
204.51061°
Mean motion
2.99303 °/min
Orbital period
120.28 mins
BSTAR
0.000093595
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-04-09 12:34:56.077Z | 316.672° NNW | 2026-04-09 12:41:56.077Z | 2.505° NNE | 21.665° | 2026-04-09 12:47:56.077Z | 51.396° ENE |
| 14 mins | 2026-04-09 14:42:56.077Z | 327.939° NNW | 2026-04-09 14:49:56.077Z | 29.762° NE | 34.829° | 2026-04-09 14:56:56.077Z | 105.916° ESE |
| 13 mins | 2026-04-09 16:48:56.077Z | 307.937° NW | 2026-04-09 16:54:56.077Z | 250.191° W | 35.995° | 2026-04-09 17:01:56.077Z | 169.822° S |
| 20 mins | 2026-04-10 06:13:56.077Z | 179.563° S | 2026-04-10 06:24:56.077Z | 114.02° SE | 34.188° | 2026-04-10 06:33:56.077Z | 53.917° ENE |
| 21 mins | 2026-04-10 08:18:56.077Z | 233.201° WSW | 2026-04-10 08:29:56.077Z | 309.161° NW | 42.832° | 2026-04-10 08:39:56.077Z | 36.862° NE |
| 16 mins | 2026-04-10 10:28:56.077Z | 284.189° WNW | 2026-04-10 10:37:56.077Z | 341.22° N | 26.3° | 2026-04-10 10:44:56.077Z | 33.382° 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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