Star · K2V
K2-209
K2-209 is a main-sequence star of spectral type K2V in the constellation Cetus, 249.4 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cetus |
|---|---|
| Distance | 249.4 light-years (76.5 pc) |
| Apparent magnitude | magnitude 11.30 |
| Absolute magnitude | magnitude 6.88 |
| Spectral type | K2V |
| Surface temperature | 4,720 K |
| Luminosity | 0.258 L☉ |
| Radius | 0.712 R☉ |
| Mass | 0.745 M☉ |
| Metallicity [Fe/H] | -0.06 |
| Right ascension (J2000) | 0h 58m 45.8s |
| Declination (J2000) | +1° 23′ 02″ |
| Space velocity (relative to the Sun) | 91.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.30. Visible from the whole Northern Hemisphere and south to latitude 89° S. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1777. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around K2-209, the Sun would look like a star of magnitude 9.25, in the direction where our sky has the constellation Virgo. It would be invisible to the naked eye.
Planets
- K2-209 b 2.08-day orbit · 0.869 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 5163 8.12 light-years
- HIP 3973 10.5 light-years
- ULAS J011151.89-010534.2 18.3 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.