Star · K7
K2-155
K2-155 is a main-sequence star of spectral type K7 in the constellation Taurus, 237.9 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Constellation | Taurus |
|---|---|
| Distance | 237.9 light-years (72.9 pc) |
| Apparent magnitude | magnitude 12.77 |
| Absolute magnitude | magnitude 8.46 |
| Spectral type | K7 |
| Surface temperature | 4,260 K |
| Luminosity | 0.059 L☉ |
| Radius | 0.58 R☉ |
| Mass | 0.65 M☉ |
| Metallicity [Fe/H] | -0.30 |
| Right ascension (J2000) | 4h 21m 52.7s |
| Declination (J2000) | +21° 21′ 12″ |
| Space velocity (relative to the Sun) | 76.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.77. Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° N it never sets. It stands highest at midnight in November, 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 K2-155, the Sun would look like a star of magnitude 9.14, in the direction where our sky has the constellation Scorpius. It would be invisible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 168.2 9.16 light-years
- HIP 19175 17.4 light-years
- 2MASS J04373705+2331080 19.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.