Star · ?
GJ 3918
GJ 3918 is a main-sequence star of spectral type ? in the constellation Serpens, 55.2 light-years from the Sun.
| Constellation | Serpens |
|---|---|
| Distance | 55.2 light-years (16.9 pc) |
| Apparent magnitude | magnitude 12.45 |
| Absolute magnitude | magnitude 11.31 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0116 L☉ |
| Radius | 0.269 R☉ |
| Mass | 0.273 M☉ (estimated) |
| Right ascension (J2000) | 15h 50m 11.2s |
| Declination (J2000) | +0° 57′ 28″ |
| Space velocity (relative to the Sun) | 15.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.45. Visible from the whole Northern Hemisphere and south to latitude 89° S. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 979 thousand years.
The Sun seen from there
From a planet around GJ 3918, the Sun would look like a star of magnitude 5.97, in the direction where our sky has the constellation Eridanus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- DENIS-P J153941.96-052042.4 6.56 light-years
- Gl 596.1B 7.19 light-years
- ψ Ser 7.20 light-years
- GJ 3937 8.15 light-years
- HIP 74702 8.72 light-years
- SDSS J151603.03+025928.9 9.16 light-years
- Gl 580A 9.18 light-years
- Gl 580B 9.18 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.