Star · M0.5 V
K2-240
K2-240 is a main-sequence star of spectral type M0.5 V in the constellation Libra, 238.3 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Libra |
|---|---|
| Distance | 238.3 light-years (73.0 pc) |
| Apparent magnitude | magnitude 13.31 |
| Absolute magnitude | magnitude 8.99 |
| Spectral type | M0.5 V |
| Surface temperature | 3,810 K |
| Luminosity | 0.053 L☉ |
| Radius | 0.54 R☉ |
| Mass | 0.58 M☉ |
| Metallicity [Fe/H] | -0.10 |
| Right ascension (J2000) | 15h 11m 23.8s |
| Declination (J2000) | −17° 52′ 32″ |
| Space velocity (relative to the Sun) | 25.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.31. Visible from the whole Southern Hemisphere and north to latitude 72° N. South of latitude 72° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1788. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.2 million years.
The Sun seen from there
From a planet around K2-240, the Sun would look like a star of magnitude 9.15, in the direction where our sky has the constellation Aries. It would be invisible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 74172 3.55 light-years
- SIMP J15014711-1831272 9.87 light-years
- HIP 74568 12.8 light-years
- HIP 73262 13.0 light-years
- HIP 75314 16.8 light-years
- HIP 74477 17.1 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.