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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
1726 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
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: 8 hours ago
TLE from 8 hours ago
0 EXPLORER 29 (GEOS 1)
1 01726U 65089A 25293.88006679 -.00000034 00000-0 25572-3 0 9991
2 01726 59.3785 207.0433 0719352 64.7373 1.2325 11.97072509621015Epoch: 2025-10-20T21:07Z
TLE epoch observation values (Epoch: 2025-10-20T21:07:17.770Z)
Latitude
52.04958°
Longitude
-90.32963°
Altitude
1,120.425 km
Speed
7.556 km/s
True Right ascension
17h 04m 16s
True Declination
51° 53' 27"
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
23:37:12
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
2,274.017 km
Perigee altitude
1,112.763 km
Semi-major axis
8,071.527 km
Eccentricity
0.07194
Inclination
59.3785°
RAAN
207.0433°
Arg. of periapsis
64.7373°
True anomaly
1.42724°
Mean anomaly
1.2325°
Eccentric anomaly
1.32802°
Mean motion
2.99302 °/min
Orbital period
120.28 mins
BSTAR
0.00025572
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #89 in the year 1965 (1965-11-06 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 17 mins | 2025-10-21 05:22:08.902Z | 311.785° NW | 2025-10-21 05:29:08.902Z | 244.547° WSW | 40.435° | 2025-10-21 05:39:08.902Z | 160.611° S |
| 9 mins | 2025-10-21 18:58:08.902Z | 157.9° S | 2025-10-21 19:02:08.902Z | 117.422° SE | 22.993° | 2025-10-21 19:07:08.902Z | 67.249° ENE |
| 12 mins | 2025-10-21 21:01:08.902Z | 236.393° WSW | 2025-10-21 21:06:08.902Z | 296.06° NW | 41.494° | 2025-10-21 21:13:08.902Z | 35.191° NE |
| 8 mins | 2025-10-21 23:09:08.902Z | 302.494° NW | 2025-10-21 23:13:08.902Z | 342.951° N | 18.875° | 2025-10-21 23:17:08.902Z | 21.359° NNE |
| 8 mins | 2025-10-22 01:18:08.902Z | 344.911° N | 2025-10-22 01:21:08.902Z | 13.93° NNE | 17.384° | 2025-10-22 01:26:08.902Z | 55.148° ENE |
| 14 mins | 2025-10-22 03:22:08.902Z | 331.852° NNW | 2025-10-22 03:28:08.902Z | 39.745° NE | 36.137° | 2025-10-22 03:36:08.902Z | 111.716° ESE |
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 ascending order |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
|---|