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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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<iframe src="https://www.satcat.com/sats-embedded/635?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/635?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

635, 1963-030B

Orbit

LEO

Last TLE update

9 hours ago

Origin

United States Space Force (US)

Manufacturer

TRW

Mission

Defense Technology

Bus & Motor

TRS, Unknown motor

Mass

1 kg wet, 1 kg dry

Launch date (UTC)

1963-07-19 (62 years ago)

Launch vehicle

ATLAS AGENA B

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Trap Box, 0.1 m

Radar Cross Section

0.032 m², Small (<0.1 m²)

Expand to show TLE details & history

TLE from 9 hours ago

0 ERS 9
1   635U 63030B   25199.57509429  .00000003  00000-0  25460-3 0  9996
2   635  88.4118 233.4458 0046271   6.0233 354.1166  8.57948366942219

Epoch: 2025-07-18T13:48Z

TLE epoch observation values (Epoch: 2025-07-18T13:48:08.146Z)

Latitude

0.00001°

Longitude

89.78727°

Altitude

3,656.887 km

Speed

6.318 km/s

True Right ascension

15h 33m 46s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

38.4005°

Longitude

-91.48906°

Altitude

3,739.485 km

Speed

6.27 km/s

Apparent Right ascension

02h 12m 37s

Apparent Declination

10° 38' 43"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

12:05:13

Azimuth

322.56° NNW

Elevation

-31.45°

Doppler factor

Orbital elements

Apogee altitude

3,745.556 km

Perigee altitude

3,652.301 km

Semi-major axis

10,077.066 km

Eccentricity

0.00463

Inclination

88.4118°

RAAN

233.4458°

Arg. of periapsis

6.0233°

True anomaly

354.06194°

Mean anomaly

354.1166°

Eccentric anomaly

354.0893°

Mean motion

2.14557 °/min

Orbital period

167.79 mins

BSTAR

0.0002546

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Other satellites on launch #30 in the year 1963 (1963-07-19 UTC)

MIDAS 7/ERS 10, 622

ATLAS AGENA B DEB, 630

DASH 2, 624 (Decayed)

ATLAS AGENA B DEB, 631

ATLAS AGENA B DEB, 3121

ATLAS AGENA B DEB, 3132

DASH 2 DEB *, 20153

ERS 9 Visibility forecast

Observer location: undefined°, undefined°

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.
34 mins	2025-07-19 01:02:38.677Z	138.263° SSE	2025-07-19 01:19:38.677Z	71.795° E	36.047°	2025-07-19 01:36:38.677Z	6.87° NNE
35 mins	2025-07-19 03:49:38.677Z	206.27° SW	2025-07-19 04:06:38.677Z	281.333° WNW	38.689°	2025-07-19 04:24:38.677Z	355.761° N
35 mins	2025-07-19 12:58:38.677Z	6.344° NNE	2025-07-19 13:15:38.677Z	77.491° E	37.805°	2025-07-19 13:33:38.677Z	152.26° SSE
34 mins	2025-07-19 15:46:38.677Z	352.246° N	2025-07-19 16:02:38.677Z	289.377° WNW	37.268°	2025-07-19 16:20:38.677Z	218.865° SW

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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Check out ERS 9, 635 on other resources

View ERS 9, 635 on NASA - NSSDCA Website

View ERS 9, 635 on Heavens-Above

View ERS 9, 635 on Keep Track

View ERS 9, 635 on Celestrak

View ERS 9, 635 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.