EWS-G3, 35491
Orbit data source: Space-Track
EWS-G3, 35491 is a payload satellite owned by NOAA (US) in GEO that was launched on Sat, 27 Jun 2009 UTC via a DELTA 4M+(4,2) 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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35491 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
Boeing/ES
Mission
On reserve Civil Weather
Bus & Motor
HS-601, R-4D?
Mass
3,209 kg wet, 1,543 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan + 1 Ant, 15.0 m
Radar Cross Section
14.281 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 EWS-G3
1 35491U 09033A 26202.64025373 -.00000359 00000-0 00000-0 0 9997
2 35491 1.7763 82.6167 0002184 39.1506 169.1325 1.00095356 6931Epoch: 2026-07-21T15:21Z
TLE epoch observation values (Epoch: 2026-07-21T15:21:57.922Z)
Latitude
-0.85788°
Longitude
121.00871°
Altitude
35,844.828 km
Speed
3.072 km/s
True Right ascension
19h 23m 37s
True Declination
0° 51' 25"
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
17:40:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,846.415 km
Perigee altitude
35,827.975 km
Semi-major axis
42,215.332 km
Eccentricity
0.00022
Inclination
1.7763°
RAAN
82.6167°
Arg. of periapsis
39.1506°
True anomaly
169.13722°
Mean anomaly
169.1325°
Eccentric anomaly
169.13486°
Mean motion
0.25023 °/min
Orbital period
1,438.68 mins
BSTAR
0
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Other satellites on launch #33 in the year 2009 (2009-06-27 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.EWS-G3 Visibility
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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. |
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| EWS-G3 is likely not visible in the next few days. |
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35491 neighbors
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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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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 descending order |
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