Star · M0
GJ 4057
GJ 4057 is a main-sequence star of spectral type M0 in the constellation Hercules, 72.5 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 72.5 light-years (22.2 pc) |
| Apparent magnitude | magnitude 10.79 |
| Absolute magnitude | magnitude 9.06 |
| Spectral type | M0 |
| Surface temperature | 3,950 K |
| Luminosity | 0.0618 L☉ |
| Radius | 0.531 R☉ |
| Mass | 0.499 M☉ (estimated) |
| Right ascension (J2000) | 18h 25m 03.9s |
| Declination (J2000) | +24° 37′ 56″ |
| Space velocity (relative to the Sun) | 44.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.79. Visible from the whole Northern Hemisphere and south to latitude 65° S. North of latitude 65° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1954. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around GJ 4057, the Sun would look like a star of magnitude 6.56, in the direction where our sky has the constellation Canis Major. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 90265 2.11 light-years
- Gl 718 5.47 light-years
- HD 164922 6.79 light-years
- WISE J181243.14+200746.4 8.18 light-years
- HIP 89490 8.48 light-years
- GJ 4046 8.73 light-years
- GJ 9638 9.28 light-years
- HIP 88976 10.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.