Star · M V
K2-3
K2-3 is a main-sequence star of spectral type M V in the constellation Leo, 143.5 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Constellation | Leo |
|---|---|
| Distance | 143.5 light-years (44.0 pc) |
| Apparent magnitude | magnitude 12.12 |
| Absolute magnitude | magnitude 8.90 |
| Spectral type | M V |
| Surface temperature | 3,840 K |
| Luminosity | 0.0587 L☉ |
| Radius | 0.546 R☉ |
| Mass | 0.549 M☉ |
| Age | 6.9 billion years |
| Metallicity [Fe/H] | -0.16 |
| Right ascension (J2000) | 11h 29m 20.5s |
| Declination (J2000) | −1° 27′ 19″ |
| Space velocity (relative to the Sun) | 40.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.12. Visible from the whole Southern Hemisphere and north to latitude 89° N. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1883. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around K2-3, the Sun would look like a star of magnitude 8.05, in the direction where our sky has the constellation Pisces. It would be invisible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 56272 8.63 light-years
- SDSS J111316.95-000246.6 10.6 light-years
- HIP 56738 11.6 light-years
- HIP 55638 13.3 light-years
- HIP 56955 14.6 light-years
- HIP 57658 15.2 light-years
- ULAS J115338.74-014724.1 16.2 light-years
- HD 103720 18.3 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.