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
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: 12 hours ago
TLE from 12 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A 26008.50036479 -.00000096 00000-0 -12301-3 0 9991
2 01726 59.3806 28.0315 0719920 116.4443 42.5230 11.97073192630543Epoch: 2026-01-08T12:00Z
TLE epoch observation values (Epoch: 2026-01-08T12:00:31.517Z)
Latitude
12.92385°
Longitude
-87.91924°
Altitude
1,286.947 km
Speed
7.394 km/s
True Right ascension
13h 21m 03s
True Declination
12° 51' 15"
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
00:07:06
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,274.471 km
Perigee altitude
1,112.301 km
Semi-major axis
8,071.523 km
Eccentricity
0.07199
Inclination
59.3806°
RAAN
28.0315°
Arg. of periapsis
116.4443°
True anomaly
48.48284°
Mean anomaly
42.523°
Eccentric anomaly
45.46318°
Mean motion
2.99302 °/min
Orbital period
120.28 mins
BSTAR
-0.00012301
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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 | 2026-01-09 01:17:24.850Z | 154.316° SSE | 2026-01-09 01:23:24.850Z | 115.814° SE | 19.404° | 2026-01-09 01:29:24.850Z | 70.983° E |
| 16 mins | 2026-01-09 03:19:24.850Z | 216.452° SW | 2026-01-09 03:28:24.850Z | 60.456° ENE | 44.896° | 2026-01-09 03:35:24.850Z | 40.667° NE |
| 11 mins | 2026-01-09 05:28:24.850Z | 279.211° WNW | 2026-01-09 05:34:24.850Z | 334.415° NNW | 25.602° | 2026-01-09 05:39:24.850Z | 23.23° NE |
| 6 mins | 2026-01-09 07:39:24.850Z | 337.262° NNW | 2026-01-09 07:41:24.850Z | 355.443° N | 15.501° | 2026-01-09 07:45:24.850Z | 32.755° NE |
| 10 mins | 2026-01-09 09:45:24.850Z | 342.257° N | 2026-01-09 09:49:24.850Z | 29.044° NE | 26.882° | 2026-01-09 09:55:24.850Z | 91.732° ESE |
| 12 mins | 2026-01-09 11:49:24.850Z | 312.894° NW | 2026-01-09 11:55:24.850Z | 213.591° SW | 42.016° | 2026-01-09 12:01:24.850Z | 155.767° SSE |
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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