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ESSAIM-1, 28494

Orbit data source: Space-Track

ESSAIM-1, 28494 is a French payload satellite in SSO that was launched on Sat, 18 Dec 2004 UTC via an ARIANE 5G+ launch vehicle from the French Guiana (FRGUI). 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/28494?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/28494?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

28494, 2004-049C

Orbit

SSO

Country

Related business

National Center for Space Studies, Paris (FR)

Manufacturer

EADS/Bremen

Mission

Defense Sigint

Bus & Motor

MYRIADE, Unknown motor

Mass

120 kg wet, 115 kg dry

Launch date (UTC)

2004-12-18 (22 years ago)

Launch vehicle

ARIANE 5G+

Launch site

French Guiana (FRGUI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 1 Pan, 2.5 m

Radar Cross Section

0.607 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 ESSAIM-1
1 28494U 04049C   26171.46115727  .00000750  00000-0  91898-4 0  9995
2 28494  98.3034  40.6804 0001625  76.8105 283.3290 14.86308621158773

Epoch: 2026-06-20T11:04Z

TLE epoch observation values (Epoch: 2026-06-20T11:04:03.988Z)

Latitude

-0.00004°

Longitude

-34.01166°

Altitude

612.237 km

Speed

7.553 km/s

True Right ascension

02h 42m 43s

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

23:08:33

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

607.667 km

Perigee altitude

605.397 km

Semi-major axis

6,984.669 km

Eccentricity

0.00016

Inclination

98.3034°

RAAN

40.6804°

Arg. of periapsis

76.8105°

True anomaly

283.31088°

Mean anomaly

283.329°

Eccentric anomaly

283.31994°

Mean motion

3.71813 °/min

Orbital period

96.82 mins

BSTAR

0.000091898

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Other satellites on launch #49 in the year 2004 (2004-12-18 UTC)

HELIOS 2A DEB, 50801 (Decayed)

HELIOS 2A DEB, 50797 (Decayed)

HELIOS 2A DEB, 51447 (Decayed)

HELIOS 2A DEB, 50799 (Decayed)

HELIOS 2A DEB, 50798 (Decayed)

HELIOS 2A DEB, 50796 (Decayed)

HELIOS 2A DEB, 50800 (Decayed)

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ESSAIM-1 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.
7 mins	2026-06-22 14:54:16.143Z	141.899° SSE	2026-06-22 14:57:16.143Z	79.759° E	36.323°	2026-06-22 15:01:16.143Z	359.761° N
7 mins	2026-06-23 04:16:16.143Z	11.497° NNE	2026-06-23 04:19:16.143Z	299.239° NW	44.896°	2026-06-23 04:23:16.143Z	196.187° SSW

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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 ESSAIM-1, 28494 on other resources

View ESSAIM-1, 28494 on NASA - NSSDCA Website

View ESSAIM-1, 28494 on Heavens-Above

View ESSAIM-1, 28494 on Keep Track

View ESSAIM-1, 28494 on Celestrak

View ESSAIM-1, 28494 on Gunter's Space Page

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

ESSAIM-1, 28494

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T11:04:03.988Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #49 in the year 2004 (2004-12-18 UTC)

ESSAIM-1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out ESSAIM-1, 28494 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago