Star · G5
GJ 3909
GJ 3909 is a giant star of spectral type G5 in the constellation Serpens, 612.7 light-years from the Sun.
| Other names | HIP 76023 |
|---|---|
| Constellation | Serpens |
| Distance | 612.7 light-years (187.9 pc) |
| Apparent magnitude | magnitude 7.71 |
| Absolute magnitude | magnitude 1.34 |
| Spectral type | G5 |
| Surface temperature | 4,510 K |
| Luminosity | 45.3 L☉ |
| Radius | 11 R☉ |
| Mass | 2.7 M☉ (estimated) |
| Right ascension (J2000) | 15h 31m 39.4s |
| Declination (J2000) | +14° 15′ 35″ |
| Space velocity (relative to the Sun) | 26.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.71); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° 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 1413. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 11 million years.
The Sun seen from there
From a planet around GJ 3909, the Sun would look like a star of magnitude 11.20, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.