Star · G2III
Gl 765B
Gl 765B is a giant star of spectral type G2III in the constellation Cygnus, 10,700 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 10,700 light-years (3,284 pc) |
| Apparent magnitude | magnitude 13.00 |
| Absolute magnitude | magnitude 0.42 |
| Spectral type | G2III |
| Surface temperature | 5,780 K |
| Luminosity | 63.1 L☉ |
| Radius | 7.93 R☉ |
| Mass | 2.97 M☉ (estimated) |
| Right ascension (J2000) | 19h 36m 26.4s |
| Declination (J2000) | +50° 13′ 15″ |
| Space velocity (relative to the Sun) | 76.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.00. Visible from the whole Northern Hemisphere and south to latitude 40° S. North of latitude 40° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 11 thousand years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 190 million years.
The Sun seen from there
From a planet around Gl 765B, the Sun would look like a star of magnitude 17.41, in the direction where our sky has the constellation Puppis. 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.