Star · K2V
GJ 9664B
GJ 9664B is a main-sequence star of spectral type K2V in the constellation Pavo, 133.2 light-years from the Sun.
| Constellation | Pavo |
|---|---|
| Distance | 133.2 light-years (40.8 pc) |
| Apparent magnitude | magnitude 8.70 |
| Absolute magnitude | magnitude 5.65 |
| Spectral type | K2V |
| Surface temperature | 4,790 K |
| Luminosity | 0.722 L☉ |
| Radius | 1.24 R☉ |
| Mass | 0.922 M☉ (estimated) |
| Right ascension (J2000) | 19h 42m 33.3s |
| Declination (J2000) | −59° 00′ 36″ |
| Space velocity (relative to the Sun) | 51.7 km/s |
In the sky
Too faint for the naked eye (magnitude 8.70); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 31° N. South of latitude 31° S 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 1893. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around GJ 9664B, the Sun would look like a star of magnitude 7.88, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.