Star · M
GJ 4040
GJ 4040 is a main-sequence star of spectral type M in the constellation Hercules, 45.6 light-years from the Sun.
| Other names | HIP 87938 |
|---|---|
| Constellation | Hercules |
| Distance | 45.6 light-years (14.0 pc) |
| Apparent magnitude | magnitude 11.79 |
| Absolute magnitude | magnitude 11.06 |
| Spectral type | M |
| Surface temperature | 3,710 K |
| Luminosity | 0.0134 L☉ |
| Radius | 0.281 R☉ |
| Mass | 0.29 M☉ (estimated) |
| Right ascension (J2000) | 17h 57m 51.0s |
| Declination (J2000) | +46° 35′ 19″ |
| Space velocity (relative to the Sun) | 49.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.79. Visible from the whole Northern Hemisphere and south to latitude 43° S. North of latitude 43° 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 1980. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 809 thousand years.
The Sun seen from there
From a planet around GJ 4040, the Sun would look like a star of magnitude 5.56, in the direction where our sky has the constellation Pictor. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASSI J1807159+501531 3.82 light-years
- GJ 4062 6.82 light-years
- GJ 720 A 7.53 light-years
- Gl 720B 7.56 light-years
- GJ 4073 8.25 light-years
- Gl 671 8.45 light-years
- GJ 1223 8.87 light-years
- WISEPA J165311.05+444423.9 9.19 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.