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OPTUS C1 — Live Satellite Tracking (NORAD 27831)
Track OPTUS C1 (NORAD catalog number 27831) 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 B of 2003's 28th orbital launch (COSPAR designation 2003-028B). As of this element set it had completed roughly 5,388 revolutions of Earth.
Moving at about 3.08 km/s, OPTUS C1 flies a geosynchronous orbit roughly 35,786 km up: its 23.9-hour period matches Earth's rotation, but at 7.1° inclination it is not geostationary — seen from the ground it traces a daily figure-eight around a fixed longitude, swinging about 7° north and south of the equator. The orbit is essentially circular (eccentricity 0.0006). Its near-equatorial 7.1° inclination keeps it above the tropics at all times. Its orbital plane crosses the equator northbound at right ascension 68.4°.
Orbital elements
| Orbit regime | geostationary/geosynchronous orbit (GEO) |
|---|---|
| Perigee × apogee altitude | ~35,770 km × 35,817 km |
| Inclination | 7.09° |
| Orbital period | 1436.1 min (1.00 rev/day) |
| Eccentricity | 0.00055 |
| Element set epoch | 2026-09-07 |
| COSPAR designation | 2003-028B |
| NORAD catalog number | 27831 |
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
OPTUS C1 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 OPTUS C1 from the ground?
Not with the naked eye. At its altitude OPTUS C1 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 OPTUS C1 in the Other Active Satellites group — usually craft from the same or adjacent launches:
- THURAYA-2 (NORAD 27825)
- MOST (NORAD 27843)
- CUTE-1 (CO-55) (NORAD 27844)
- CUBESAT XI-IV (CO-57) (NORAD 27848)
- HELLAS-SAT 2 (NORAD 27811)
- SCISAT 1 (NORAD 27858)
Browse the Other Active Satellites directory or the full satellite directory · What is a TLE? · WatchSat live globe