Star · G5V
K2-340
K2-340 is a main-sequence star of spectral type G5V in the constellation Cancer, 2,408 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cancer |
|---|---|
| Distance | 2,408 light-years (738.1 pc) |
| Apparent magnitude | magnitude 14.43 |
| Absolute magnitude | magnitude 5.09 |
| Spectral type | G5V |
| Surface temperature | 5,530 K |
| Luminosity | 0.995 L☉ |
| Radius | 1.13 R☉ |
| Mass | 0.93 M☉ |
| Metallicity [Fe/H] | 0.08 |
| Right ascension (J2000) | 8h 31m 45.0s |
| Declination (J2000) | +19° 04′ 29″ |
| Space velocity (relative to the Sun) | 67.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.43. Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 383 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 43 million years.
The Sun seen from there
From a planet around K2-340, the Sun would look like a star of magnitude 14.17, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Planets
- K2-340 b 29.7-day orbit · 3.36 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.