Star · F5 V
Koit
Koit is a main-sequence star of spectral type F5 V in the constellation Lynx, 862.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | XO-4 |
|---|---|
| Constellation | Lynx |
| Distance | 862.6 light-years (264.5 pc) |
| Apparent magnitude | magnitude 10.86 |
| Absolute magnitude | magnitude 3.75 |
| Spectral type | F5 V |
| Surface temperature | 6,400 K |
| Luminosity | 3.43 L☉ |
| Radius | 1.45 R☉ |
| Mass | 1.1 M☉ |
| Age | 2.1 billion years |
| Metallicity [Fe/H] | -0.04 |
| Right ascension (J2000) | 7h 21m 33.2s |
| Declination (J2000) | +58° 16′ 05″ |
| Space velocity (relative to the Sun) | 22.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.86. Visible from the whole Northern Hemisphere and south to latitude 32° S. North of latitude 32° 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 the year 1163. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 15 million years.
The Sun seen from there
From a planet around Koit, the Sun would look like a star of magnitude 11.94, in the direction where our sky has the constellation Pavo. It would be invisible to the naked eye.
Planets
- XO-4 b 4.13-day orbit · 14 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.