Star · G2V
Gl 677B
Gl 677B is a main-sequence star of spectral type G2V in the constellation Hercules, 76.9 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 76.9 light-years (23.6 pc) |
| Apparent magnitude | magnitude 9.93 |
| Absolute magnitude | magnitude 8.07 |
| Spectral type | G2V |
| Surface temperature | 5,780 K |
| Luminosity | 0.0551 L☉ |
| Radius | 0.234 R☉ |
| Mass | 0.484 M☉ (estimated) |
| Right ascension (J2000) | 17h 29m 19.6s |
| Declination (J2000) | +29° 23′ 24″ |
| Space velocity (relative to the Sun) | 38.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.93. Visible from the whole Northern Hemisphere and south to latitude 61° S. North of latitude 61° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1949. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around Gl 677B, the Sun would look like a star of magnitude 6.69, in the direction where our sky has the constellation Columba. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 677A 0.57 light-years
- HD 156668 4.23 light-years
- GJ 4019B 5.72 light-years
- 2MASS J17392515+2454421 6.84 light-years
- Gl 679 6.98 light-years
- Sarin 7.44 light-years
- WISEPA J171104.60+350036.8 9.19 light-years
- Gl 686.1A 9.22 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.