Star · K2V
Gl 42
Gl 42 is a main-sequence star of spectral type K2V in the constellation Sculptor, 45.5 light-years from the Sun.
| Other names | HIP 4148 |
|---|---|
| Constellation | Sculptor |
| Distance | 45.5 light-years (13.9 pc) |
| Apparent magnitude | magnitude 7.15 |
| Absolute magnitude | magnitude 6.43 |
| Spectral type | K2V |
| Surface temperature | 4,900 K |
| Luminosity | 0.33 L☉ |
| Radius | 0.797 R☉ |
| Mass | 0.758 M☉ (estimated) |
| Right ascension (J2000) | 0h 53m 01.1s |
| Declination (J2000) | −30° 21′ 25″ |
| Space velocity (relative to the Sun) | 43.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.15); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 60° N. South of latitude 60° S it never sets. 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 1981. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 807 thousand years.
The Sun seen from there
From a planet around Gl 42, the Sun would look like a star of magnitude 5.55, in the direction where our sky has the constellation Coma Berenices. 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.