Star · K8V
K2-257
K2-257 is a main-sequence star of spectral type K8V in the constellation Virgo, 211.3 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Virgo |
|---|---|
| Distance | 211.3 light-years (64.8 pc) |
| Apparent magnitude | magnitude 13.67 |
| Absolute magnitude | magnitude 9.61 |
| Spectral type | K8V |
| Surface temperature | 3,730 K |
| Luminosity | 0.0416 L☉ |
| Radius | 0.5 R☉ |
| Mass | 0.52 M☉ |
| Metallicity [Fe/H] | -0.03 |
| Right ascension (J2000) | 12h 33m 06.8s |
| Declination (J2000) | −1° 57′ 12″ |
| Space velocity (relative to the Sun) | 21.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.67. Visible from the whole Southern Hemisphere and north to latitude 88° 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 1815. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.7 million years.
The Sun seen from there
From a planet around K2-257, the Sun would look like a star of magnitude 8.89, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Planets
- K2-257 b 1.61-day orbit · 0.83 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 60749 9.72 light-years
- ULAS J122343.35-013100.7 9.73 light-years
- HIP 61608 9.76 light-years
- HIP 62103 12.9 light-years
- HIP 61529 13.5 light-years
- HIP 60645 15.7 light-years
- HIP 60987 15.7 light-years
- HIP 62057 17.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.