ERS 9, 635
Orbit data source: Space-Track
ERS 9, 635 is a payload satellite owned by USAF SSD (US) in LEO that was launched on Fri, 19 Jul 1963 UTC via an ATLAS AGENA B launch vehicle from the Air Force Western Test Range (AFWTR). 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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635 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
TRW
Mission
Defense Technology
Bus & Motor
TRS, Unknown motor
Mass
1 kg wet, 1 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Trap Box, 0.1 m
Radar Cross Section
0.032 m², Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 4 days ago
TLE from 4 days ago
0 ERS 9
1 00635U 63030B 25257.87238224 .00000023 00000-0 10454-1 0 9993
2 00635 88.4157 230.2170 0045219 307.4134 52.2606 8.57948281946830Epoch: 2025-09-14T20:56Z
TLE epoch observation values (Epoch: 2025-09-14T20:56:13.825Z)
Latitude
0.00005°
Longitude
-77.92576°
Altitude
3,675.513 km
Speed
6.306 km/s
True Right ascension
15h 20m 52s
True Declination
0° 00' 00"
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
02:58:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,744.497 km
Perigee altitude
3,653.362 km
Semi-major axis
10,077.066 km
Eccentricity
0.00452
Inclination
88.4157°
RAAN
230.217°
Arg. of periapsis
307.4134°
True anomaly
52.67179°
Mean anomaly
52.2606°
Eccentric anomaly
52.46605°
Mean motion
2.14557 °/min
Orbital period
167.79 mins
BSTAR
0.010454
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Other satellites on launch #30 in the year 1963 (1963-07-19 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.ERS 9 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-09-18 10:08:44.597Z | 167.569° S | 2025-09-18 10:08:44.597Z | 167.569° S | 32.009° | 2025-09-18 10:17:44.597Z | 175.193° S |
| 28 mins | 2025-09-18 12:29:44.597Z | 346.569° N | 2025-09-18 12:43:44.597Z | 294.906° NW | 27.383° | 2025-09-18 12:57:44.597Z | 244.726° WSW |
| 29 mins | 2025-09-18 20:11:44.597Z | 119.35° SE | 2025-09-18 20:25:44.597Z | 66.605° ENE | 29.437° | 2025-09-18 20:40:44.597Z | 11.097° NNE |
| 36 mins | 2025-09-18 22:53:44.597Z | 190.409° SSW | 2025-09-18 23:10:44.597Z | 266.175° W | 43.306° | 2025-09-18 23:29:44.597Z | 358.051° N |
| 18 mins | 2025-09-19 01:56:44.597Z | 279.806° WNW | 2025-09-19 02:04:44.597Z | 306.838° NW | 14.498° | 2025-09-19 02:14:44.597Z | 340.194° N |
| 32 mins | 2025-09-19 08:04:44.597Z | 10.705° NNE | 2025-09-19 08:20:44.597Z | 74.221° E | 31.243° | 2025-09-19 08:36:44.597Z | 135.212° SSE |
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 |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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