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

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ISO8601 Format

Identifier

635, 1963-030B

Orbit

LEO

Country

Related business

United States Space Force (US)

Manufacturer

TRW

Mission

Spacecraft

Bus & Motor

TRS, Unknown motor

Mass

1 kg wet, 1 kg dry

Launch date (UTC)

1963-07-19 (63 years ago)

Launch vehicle

ATLAS AGENA B

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

TETRAHEDRON, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 11 months ago

TLE from 11 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  8.57948362948851

Epoch: 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

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

22:53:45

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)

DASH 2, 624 (Decayed)

DASH 2 DEB *, 20153

ATLAS AGENA B DEB, 631

ATLAS AGENA B DEB, 3121

ATLAS AGENA B DEB, 630

MIDAS 7/ERS 10, 622

ATLAS AGENA B DEB, 3132

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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.
35 mins	2026-09-17 07:09:26.590Z	6.147° NNE	2026-09-17 07:27:26.590Z	76.96° E	43.403°	2026-09-17 07:44:26.590Z	143.672° SSE
35 mins	2026-09-17 09:58:26.590Z	353.716° N	2026-09-17 10:15:26.590Z	281.64° WNW	57.666°	2026-09-17 10:33:26.590Z	210.988° SW
7 mins	2026-09-17 12:52:26.590Z	326.113° NNW	2026-09-17 12:55:26.590Z	316.39° NNW	11.387°	2026-09-17 12:59:26.590Z	303.481° NW
17 mins	2026-09-17 17:51:26.590Z	76.819° E	2026-09-17 17:59:26.590Z	49.564° ENE	16.284°	2026-09-17 18:08:26.590Z	19.807° NNE
36 mins	2026-09-17 20:23:26.590Z	159.791° S	2026-09-17 20:41:26.590Z	72.966° E	70.756°	2026-09-17 20:59:26.590Z	3.284° NNE
31 mins	2026-09-17 23:15:26.590Z	232.266° WSW	2026-09-17 23:30:26.590Z	290.443° WNW	33.479°	2026-09-17 23:46:26.590Z	350.47° N
22 mins	2026-09-18 05:35:26.590Z	18.797° NNE	2026-09-18 05:46:26.590Z	56.101° ENE	17.479°	2026-09-18 05:57:26.590Z	93.131° ESE

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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

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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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.

ERS 9, 635

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 11 months ago

TLE from 11 months ago

TLE epoch observation values (Epoch: 2025-10-08T10:11:18.365Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

ERS 9 Visibility forecast

Co-orbital & Co-planar RSOs

Check out ERS 9, 635 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 11 months ago