Star · G7
K2-397
K2-397 is a main-sequence star of spectral type G7 in the constellation Taurus, 650.2 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Taurus |
|---|---|
| Distance | 650.2 light-years (199.4 pc) |
| Apparent magnitude | magnitude 11.87 |
| Absolute magnitude | magnitude 5.37 |
| Spectral type | G7 |
| Surface temperature | 5,390 K |
| Luminosity | 0.716 L☉ |
| Radius | 0.966 R☉ |
| Mass | 0.937 M☉ |
| Metallicity [Fe/H] | 0.11 |
| Right ascension (J2000) | 5h 19m 48.4s |
| Declination (J2000) | +21° 15′ 33″ |
| Space velocity (relative to the Sun) | 24.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.87. 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 December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1376. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around K2-397, the Sun would look like a star of magnitude 11.33, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Planets
- K2-397 b 3.57-day orbit · 2.42 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.