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THEMIS D — Live Satellite Tracking (NORAD 30797)
Track THEMIS D (NORAD catalog number 30797) live on the WatchSat interactive 3D globe above. Its position is propagated in real time from the latest CelesTrak two-line element set using the SGP4/SDP4 orbital model — the same math professional trackers run. It is object D of 2007's 4th orbital launch (COSPAR designation 2007-004D). It went up together with 2 other satellites from that launch still in the active catalog. As of this element set it had completed roughly 4,173 revolutions of Earth.
Its speed swings from 0.89 km/s at apogee to 9.68 km/s at perigee. THEMIS D follows a highly elliptical orbit, completing a revolution every 27.3 hours. The orbit is strongly elliptical (eccentricity 0.8310): each revolution swings from 1,411 km at perigee out to 77,957 km at apogee. Its near-equatorial 8.2° inclination keeps it above the tropics at all times. Its orbital plane crosses the equator northbound at right ascension 76.3°. Earth's equatorial bulge drifts that plane westward about 0.10° per day.
Orbital elements
| Orbit regime | highly elliptical orbit (HEO) |
|---|---|
| Perigee × apogee altitude | ~1,411 km × 77,957 km |
| Inclination | 8.15° |
| Orbital period | 1639.4 min (0.88 rev/day) |
| Eccentricity | 0.83103 |
| Element set epoch | 2026-08-30 |
| COSPAR designation | 2007-004D |
| NORAD catalog number | 30797 |
This page's orbital elements come from the CelesTrak catalog of 2026-09-08. The live 3D view above fetches its own current CelesTrak data when the page opens, through an edge cache that refreshes roughly every 30 minutes.
About the Other Active Satellites group
THEMIS D is one of 4,471 active satellites in WatchSat's general catalog — the broad population of Earth-observation, communications, science, amateur-radio and technology spacecraft outside the giant broadband constellations. Browse all other active satellites live in 3D.
Can you see THEMIS D from the ground?
Not with the naked eye. At its altitude THEMIS D is far beyond unaided visibility — following satellites this high takes a telescope and good timing. You can still track it precisely in the live 3D view above, or check pass predictions for your location.
Related satellites
Nearest catalog neighbors of THEMIS D in the Other Active Satellites group — usually craft from the same or adjacent launches:
- THEMIS E (NORAD 30798)
- SKYNET 5A (NORAD 30794)
- THEMIS A (NORAD 30580)
- ANIK F3 (NORAD 31102)
- HAIYANG-1B (NORAD 31113)
- SAUDISAT 3 (NORAD 31118)
Browse the Other Active Satellites directory or the full satellite directory · What is a TLE? · WatchSat live globe