Star · K7
K2-17
K2-17 is a main-sequence star of spectral type K7 in the constellation Virgo, 408.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Virgo |
|---|---|
| Distance | 408.0 light-years (125.1 pc) |
| Apparent magnitude | magnitude 13.41 |
| Absolute magnitude | magnitude 7.92 |
| Spectral type | K7 |
| Surface temperature | 4,320 K |
| Luminosity | 0.101 L☉ |
| Radius | 0.66 R☉ |
| Mass | 0.71 M☉ |
| Metallicity [Fe/H] | 0.15 |
| Right ascension (J2000) | 11h 53m 19.1s |
| Declination (J2000) | +6° 24′ 44″ |
| Space velocity (relative to the Sun) | 17.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.41. Visible from the whole Northern Hemisphere and south to latitude 84° S. 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 1618. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.2 million years.
The Sun seen from there
From a planet around K2-17, the Sun would look like a star of magnitude 10.32, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Planets
- K2-17 b 18-day orbit · 2.23 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.