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THEMIS E, 30798

Orbit data source: Space-Track

THEMIS E, 30798 is a payload satellite owned by GSFC (US) in HEO that was launched on Sat, 17 Feb 2007 UTC via a DELTA 7925-10C launch vehicle from the Air Force Eastern Test Range (AFETR). 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/30798?theme=dark&initialShowStats=false

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Identifier

30798, 2007-004E

Orbit

HEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Swales

Mission

Operational Civil Science

Bus & Motor

ATK-A100, Unknown motor

Mass

125 kg wet, 76 kg dry

Launch date (UTC)

2007-02-17 (19 years ago)

Launch vehicle

DELTA 7925-10C

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 6 Rod, 24.5 m

Radar Cross Section

0.720 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 THEMIS E
1 30798U 07004E   26129.88648252  .00000037  00000-0  00000-0 0  9991
2 30798   5.9125 100.3610 8448398 208.6445 192.4059  0.88042304 65588

Epoch: 2026-05-09T21:16Z

TLE epoch observation values (Epoch: 2026-05-09T21:16:32.089Z)

Latitude

3.00024°

Longitude

-55.98927°

Altitude

78,087.181 km

Speed

0.877 km/s

True Right ascension

08h 43m 22s

True Declination

2° 59' 55"

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

14:28:52

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

78,466.545 km

Perigee altitude

757.723 km

Semi-major axis

45,990.271 km

Eccentricity

0.84484

Inclination

5.9125°

RAAN

100.361°

Arg. of periapsis

208.6445°

True anomaly

181.95432°

Mean anomaly

192.4059°

Eccentric anomaly

186.73174°

Mean motion

0.22006 °/min

Orbital period

1,635.91 mins

BSTAR

Loading maneuver chart data...

Computing Atmospheric mass density...

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Other satellites on launch #4 in the year 2007 (2007-02-17 UTC)

ARTEMIS P1 (THEMIS B), 30581

THEMIS A, 30580

DELTA 2 R/B(1), 30585 (Decayed)

THEMIS D, 30797

ARTEMIS P2 (THEMIS C), 30582

DELTA 2 R/B(2), 30799 (Decayed)

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THEMIS E 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.
80 mins	2026-05-10 06:17:04.191Z	252.955° W	2026-05-10 06:17:04.191Z	252.955° W	18.673°	2026-05-10 07:37:04.191Z	260.298° W
684 mins	2026-05-10 18:53:04.191Z	100.4° ESE	2026-05-11 00:31:04.191Z	180.869° SSW	37.594°	2026-05-11 06:17:04.191Z	262.369° W

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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 THEMIS E, 30798 on other resources

View THEMIS E, 30798 on NASA - NSSDCA Website

View THEMIS E, 30798 on Heavens-Above

View THEMIS E, 30798 on Keep Track

View THEMIS E, 30798 on Celestrak

View THEMIS E, 30798 on Gunter's Space Page

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

THEMIS E, 30798

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-05-09T21:16:32.089Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #4 in the year 2007 (2007-02-17 UTC)

THEMIS E Visibility forecast

Co-orbital & Co-planar RSOs

Check out THEMIS E, 30798 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago