Star · K5V
Gl 664
Gl 664 is a main-sequence star of spectral type K5V in the constellation Ophiuchus, 19.4 light-years from the Sun.
| Other names | HIP 84478 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 19.4 light-years (5.95 pc) |
| Apparent magnitude | magnitude 6.33 |
| Absolute magnitude | magnitude 7.46 |
| Spectral type | K5V |
| Surface temperature | 4,420 K |
| Luminosity | 0.173 L☉ |
| Radius | 0.708 R☉ |
| Mass | 0.645 M☉ (estimated) |
| Right ascension (J2000) | 17h 16m 13.3s |
| Declination (J2000) | −26° 32′ 45″ |
| Space velocity (relative to the Sun) | 34.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.33). Visible from the whole Southern Hemisphere and north to latitude 63° N. South of latitude 63° S 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 2007. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 344 thousand years.
The Sun seen from there
From a planet around Gl 664, the Sun would look like a star of magnitude 3.70, in the direction where our sky has the constellation Taurus. It would be visible 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.