Star · K0
Gl 240
Gl 240 is a main-sequence star of spectral type K0 in the constellation Puppis, 49.1 light-years from the Sun.
| Other names | HIP 31634 |
|---|---|
| Constellation | Puppis |
| Distance | 49.1 light-years (15.0 pc) |
| Apparent magnitude | magnitude 9.61 |
| Absolute magnitude | magnitude 8.72 |
| Spectral type | K0 |
| Surface temperature | 3,860 K |
| Luminosity | 0.0934 L☉ |
| Radius | 0.683 R☉ |
| Mass | 0.553 M☉ (estimated) |
| Right ascension (J2000) | 6h 37m 11.2s |
| Declination (J2000) | −50° 02′ 18″ |
| Space velocity (relative to the Sun) | 11.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.61. Visible from the whole Southern Hemisphere and north to latitude 40° N. South of latitude 40° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1977. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 870 thousand years.
The Sun seen from there
From a planet around Gl 240, the Sun would look like a star of magnitude 5.72, in the direction where our sky has the constellation Draco. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.