Star · K4III
18 Leo
18 Leo is a giant star of spectral type K4III in the constellation Leo, 731.3 light-years from the Sun.
| Other names | HIP 47959 |
|---|---|
| Constellation | Leo |
| Distance | 731.3 light-years (224.2 pc) |
| Apparent magnitude | magnitude 5.67 |
| Absolute magnitude | magnitude −1.08 |
| Spectral type | K4III |
| Surface temperature | 3,810 K |
| Luminosity | 835 L☉ |
| Radius | 66.3 R☉ |
| Mass | 6.21 M☉ (estimated) |
| Right ascension (J2000) | 9h 46m 23.3s |
| Declination (J2000) | +11° 48′ 36″ |
| Space velocity (relative to the Sun) | 38.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.67). Visible from the whole Northern Hemisphere and south to latitude 78° S. North of latitude 78° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1295. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 13 million years.
The Sun seen from there
From a planet around 18 Leo, the Sun would look like a star of magnitude 11.58, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.