Star · G4V
GJ 9648B
GJ 9648B is a main-sequence star of spectral type G4V in the constellation Cygnus, 82.4 light-years from the Sun.
| Other names | HIP 94336 |
|---|---|
| Constellation | Cygnus |
| Distance | 82.4 light-years (25.3 pc) |
| Apparent magnitude | magnitude 5.85 |
| Absolute magnitude | magnitude 3.84 |
| Spectral type | G4V |
| Surface temperature | 5,720 K |
| Luminosity | 2.74 L☉ |
| Radius | 1.68 R☉ |
| Mass | 1.29 M☉ (estimated) |
| Right ascension (J2000) | 19h 12m 05.0s |
| Declination (J2000) | +49° 51′ 21″ |
| Space velocity (relative to the Sun) | 88.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.85). 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 around the year 1944. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.5 million years.
The Sun seen from there
From a planet around GJ 9648B, the Sun would look like a star of magnitude 6.84, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 9648A 0.00 light-years
- GJ 1237 4.52 light-years
- DMPP-4 5.50 light-years
- HIP 94701 6.31 light-years
- WD 1856+534 6.32 light-years
- Gl 732.1 7.77 light-years
- WISEA J190722.56+472745.3 9.70 light-years
- GJ 9674 10.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.