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: 9 hours ago
TLE from 9 hours ago
0 EXPLORER 29 (GEOS 1)
1 1726U 65089A 26150.15597387 -.00000090 00000-0 -97615-4 0 9996
2 1726 59.3834 69.5790 0713922 209.0075 302.9735 11.97075970647500Epoch: 2026-05-30T03:44Z
TLE epoch observation values (Epoch: 2026-05-30T03:44:36.142Z)
Latitude
29.82396°
Longitude
-73.97612°
Altitude
1,413.196 km
Speed
7.281 km/s
True Right ascension
15h 19m 24s
True Declination
29° 41' 18"
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
21:52:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,269.616 km
Perigee altitude
1,117.131 km
Semi-major axis
8,071.511 km
Eccentricity
0.07139
Inclination
59.3834°
RAAN
69.579°
Arg. of periapsis
209.0075°
True anomaly
295.77979°
Mean anomaly
302.9735°
Eccentric anomaly
299.41018°
Mean motion
2.99303 °/min
Orbital period
120.28 mins
BSTAR
-0.000097615
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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. |
|---|---|---|---|---|---|---|---|
| 21 mins | 2026-05-30 18:58:22.401Z | 169.787° S | 2026-05-30 19:09:22.401Z | 109.023° ESE | 30.233° | 2026-05-30 19:19:22.401Z | 54.482° ENE |
| 24 mins | 2026-05-30 21:02:22.401Z | 223.734° SW | 2026-05-30 21:14:22.401Z | 326.194° NNW | 44.603° | 2026-05-30 21:26:22.401Z | 39.733° NE |
| 20 mins | 2026-05-30 23:11:22.401Z | 274.108° WNW | 2026-05-30 23:21:22.401Z | 330.665° NNW | 31.004° | 2026-05-30 23:31:22.401Z | 37.312° NE |
| 16 mins | 2026-05-31 01:23:22.401Z | 315.353° NNW | 2026-05-31 01:31:22.401Z | 3.678° NNE | 25.135° | 2026-05-31 01:39:22.401Z | 58.854° ENE |
| 17 mins | 2026-05-31 03:31:22.401Z | 325.72° NNW | 2026-05-31 03:40:22.401Z | 37.472° NE | 36.671° | 2026-05-31 03:48:22.401Z | 107.641° ESE |
| 16 mins | 2026-05-31 05:37:22.401Z | 311.855° NW | 2026-05-31 05:45:22.401Z | 249.61° W | 38.712° | 2026-05-31 05:53:22.401Z | 166.952° S |
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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