Star · K2V
GJ 3930
GJ 3930 is a main-sequence star of spectral type K2V in the constellation Serpens, 230.3 light-years from the Sun.
| Other names | HIP 78259 |
|---|---|
| Constellation | Serpens |
| Distance | 230.3 light-years (70.6 pc) |
| Apparent magnitude | magnitude 8.19 |
| Absolute magnitude | magnitude 3.95 |
| Spectral type | K2V |
| Surface temperature | 4,750 K |
| Luminosity | 3.51 L☉ |
| Radius | 2.76 R☉ |
| Mass | 1.37 M☉ (estimated) |
| Right ascension (J2000) | 15h 58m 44.0s |
| Declination (J2000) | +25° 34′ 10″ |
| Space velocity (relative to the Sun) | 47.7 km/s |
In the sky
Too faint for the naked eye (magnitude 8.19); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° N it never sets. 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 1796. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.1 million years.
The Sun seen from there
From a planet around GJ 3930, the Sun would look like a star of magnitude 9.07, 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 CrB 12.7 light-years
- SDSS J154854.89+281404.7 15.2 light-years
- HIP 78015 18.3 light-years
- HIP 79917 18.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.