Star · M(3.5+/-0.5) V
K2-315
K2-315 is a main-sequence star of spectral type M(3.5+/-0.5) V in the constellation Libra, 185.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Libra |
|---|---|
| Distance | 185.0 light-years (56.7 pc) |
| Apparent magnitude | magnitude 17.12 |
| Absolute magnitude | magnitude 13.35 |
| Spectral type | M(3.5+/-0.5) V |
| Surface temperature | 3,300 K |
| Luminosity | 0.0041 L☉ |
| Radius | 0.196 R☉ |
| Mass | 0.174 M☉ |
| Age | 1.0 billion years |
| Metallicity [Fe/H] | -0.24 |
| Right ascension (J2000) | 15h 12m 05.1s |
| Declination (J2000) | −20° 06′ 29″ |
| Space velocity (relative to the Sun) | 38.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 17.12. Visible from the whole Southern Hemisphere and north to latitude 70° N. South of latitude 70° 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 1841. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.3 million years.
The Sun seen from there
From a planet around K2-315, the Sun would look like a star of magnitude 8.60, in the direction where our sky has the constellation Aries. It would be invisible to the naked eye.
Planets
- K2-315 b 3.14-day orbit · 0.95 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 75027 6.76 light-years
- HIP 74423 9.04 light-years
- HIP 73096 15.0 light-years
- ο Lib 16.3 light-years
- HIP 72677 18.5 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.