Star · M0
Koeia
Koeia is a main-sequence star of spectral type M0 in the constellation Eridanus, 76.4 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 12961 |
|---|---|
| Constellation | Eridanus |
| Distance | 76.4 light-years (23.4 pc) |
| Apparent magnitude | magnitude 10.25 |
| Absolute magnitude | magnitude 8.40 |
| Spectral type | M0 |
| Surface temperature | 3,900 K |
| Luminosity | 0.0993 L☉ |
| Radius | 0.65 R☉ |
| Mass | 0.69 M☉ |
| Metallicity [Fe/H] | -0.14 |
| Right ascension (J2000) | 2h 46m 42.9s |
| Declination (J2000) | −23° 05′ 12″ |
| Space velocity (relative to the Sun) | 48.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.25. Visible from the whole Southern Hemisphere and north to latitude 67° N. South of latitude 67° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1950. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around Koeia, the Sun would look like a star of magnitude 6.68, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Planets
- HIP 12961 b 57.4-day orbit · 13.2 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.