Star · G5
Gl 42.1
Gl 42.1 is a main-sequence star of spectral type G5 in the constellation Andromeda, 97.7 light-years from the Sun.
| Other names | HIP 4290 |
|---|---|
| Constellation | Andromeda |
| Distance | 97.7 light-years (29.9 pc) |
| Apparent magnitude | magnitude 7.41 |
| Absolute magnitude | magnitude 5.03 |
| Spectral type | G5 |
| Surface temperature | 5,770 K |
| Luminosity | 0.905 L☉ |
| Radius | 0.952 R☉ |
| Mass | 0.975 M☉ (estimated) |
| Right ascension (J2000) | 0h 54m 59.3s |
| Declination (J2000) | +24° 06′ 01″ |
| Space velocity (relative to the Sun) | 37.5 km/s |
In the sky
Too faint for the naked eye (magnitude 7.41); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 66° S. North of latitude 66° N 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 1928. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around Gl 42.1, the Sun would look like a star of magnitude 7.21, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 5041 5.05 light-years
- HIP 3378 7.24 light-years
- HIP 4061 7.92 light-years
- 2MASSI J0103320+193536 10.3 light-years
- HIP 5335 10.7 light-years
- HIP 3571 12.8 light-years
- Gl 53.2 13.3 light-years
- HIP 6342 13.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.