Star · G8V
GJ 3917
GJ 3917 is a main-sequence star of spectral type G8V in the constellation Serpens, 70.7 light-years from the Sun.
| Other names | HIP 77408 |
|---|---|
| Constellation | Serpens |
| Distance | 70.7 light-years (21.7 pc) |
| Apparent magnitude | magnitude 7.44 |
| Absolute magnitude | magnitude 5.76 |
| Spectral type | G8V |
| Surface temperature | 5,280 K |
| Luminosity | 0.524 L☉ |
| Radius | 0.866 R☉ |
| Mass | 0.851 M☉ (estimated) |
| Right ascension (J2000) | 15h 48m 09.5s |
| Declination (J2000) | +1° 34′ 18″ |
| Space velocity (relative to the Sun) | 36.5 km/s |
In the sky
Too faint for the naked eye (magnitude 7.44); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 88° 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 1955. 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 3917, the Sun would look like a star of magnitude 6.51, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ε Ser 3.93 light-years
- WISEA J160516.79+002139.0 5.63 light-years
- Unukalhai 7.20 light-years
- SDSS J152103.24+013142.7 9.64 light-years
- SIMP J1619275+031350 10.1 light-years
- WISE J151721.13+052929.3 10.6 light-years
- Gl 600 11.5 light-years
- Gl 583 13.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.