Star · M3.0 V
K2-239
K2-239 is a main-sequence star of spectral type M3.0 V in the constellation Sextans, 101.5 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Constellation | Sextans |
|---|---|
| Distance | 101.5 light-years (31.1 pc) |
| Apparent magnitude | magnitude 14.52 |
| Absolute magnitude | magnitude 12.05 |
| Spectral type | M3.0 V |
| Surface temperature | 3,420 K |
| Luminosity | 0.016 L☉ |
| Radius | 0.36 R☉ |
| Mass | 0.4 M☉ |
| Metallicity [Fe/H] | -0.10 |
| Right ascension (J2000) | 10h 42m 22.6s |
| Declination (J2000) | +4° 26′ 29″ |
| Space velocity (relative to the Sun) | 6.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.52. Visible from the whole Northern Hemisphere and south to latitude 86° S. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1924. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around K2-239, the Sun would look like a star of magnitude 7.30, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- SDSS J104409.43+042937.6 2.96 light-years
- HIP 51386 7.71 light-years
- HIP 51571 9.84 light-years
- ULAS J102144.87+054446.1 9.94 light-years
- HIP 52705 10.2 light-years
- GJ 3624 11.0 light-years
- WISEA J104216.89-003935.9 11.1 light-years
- SDSS J104922.45+012559.2 11.8 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.