Star · K5III
K2-331
K2-331 is a giant star of spectral type K5III in the constellation Cancer, 679.6 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Cancer |
|---|---|
| Distance | 679.6 light-years (208.4 pc) |
| Apparent magnitude | magnitude 11.42 |
| Absolute magnitude | magnitude 4.83 |
| Spectral type | K5III |
| Surface temperature | 5,990 K |
| Luminosity | 1.15 L☉ |
| Radius | 1.06 R☉ |
| Mass | 1.1 M☉ |
| Metallicity [Fe/H] | 0.08 |
| Right ascension (J2000) | 8h 50m 57.0s |
| Declination (J2000) | +13° 10′ 13″ |
| Space velocity (relative to the Sun) | 30.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.42. Visible from the whole Northern Hemisphere and south to latitude 77° S. North of latitude 77° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1346. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around K2-331, the Sun would look like a star of magnitude 11.42, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Planets
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.