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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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
TRW
Mission
Spacecraft
Bus & Motor
TRS, Unknown motor
Mass
1 kg wet, 1 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 2 months ago
TLE from 2 months ago
0 ERS 9
1 00635U 63030B 25281.42451812 -.00000018 00000-0 -10374-1 0 9998
2 00635 88.4228 228.9160 0044348 284.1662 75.4263 8.57948362948851Epoch: 2025-10-08T10:11Z
TLE epoch observation values (Epoch: 2025-10-08T10:11:18.365Z)
Latitude
-0.00006°
Longitude
58.79022°
Altitude
3,692.22 km
Speed
6.296 km/s
True Right ascension
15h 15m 39s
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
02:35:13
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,743.618 km
Perigee altitude
3,654.239 km
Semi-major axis
10,077.066 km
Eccentricity
0.00443
Inclination
88.4228°
RAAN
228.916°
Arg. of periapsis
284.1662°
True anomaly
75.91882°
Mean anomaly
75.4263°
Eccentric anomaly
75.67249°
Mean motion
2.14557 °/min
Orbital period
167.79 mins
BSTAR
-0.010374
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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. |
|---|---|---|---|---|---|---|---|
| 31 mins | 2025-12-16 05:58:29.219Z | 350.078° N | 2025-12-16 06:13:29.219Z | 295.003° NW | 31.107° | 2025-12-16 06:29:29.219Z | 234.377° WSW |
| 27 mins | 2025-12-16 13:43:29.219Z | 109.197° ESE | 2025-12-16 13:56:29.219Z | 62.124° ENE | 25.665° | 2025-12-16 14:10:29.219Z | 12.547° NNE |
| 37 mins | 2025-12-16 16:22:29.219Z | 181.516° SSW | 2025-12-16 16:40:29.219Z | 255.843° W | 44.638° | 2025-12-16 16:59:29.219Z | 359.46° N |
| 23 mins | 2025-12-16 19:22:29.219Z | 264.456° W | 2025-12-16 19:33:29.219Z | 302.818° NW | 18.374° | 2025-12-16 19:45:29.219Z | 343.879° N |
| 30 mins | 2025-12-17 01:34:29.219Z | 12.079° NNE | 2025-12-17 01:49:29.219Z | 68.842° E | 26.969° | 2025-12-17 02:04:29.219Z | 124.847° SE |
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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