Star · K2III
HIP 664
HIP 664 is a giant star of spectral type K2III in the constellation Pisces, 1,178 light-years from the Sun.
| Constellation | Pisces |
|---|---|
| Distance | 1,178 light-years (361.3 pc) |
| Apparent magnitude | magnitude 6.18 |
| Absolute magnitude | magnitude −1.61 |
| Spectral type | K2III |
| Surface temperature | 4,010 K |
| Luminosity | 1,070 L☉ |
| Radius | 67.9 R☉ |
| Mass | 6.66 M☉ (estimated) |
| Right ascension (J2000) | 0h 08m 12.1s |
| Declination (J2000) | −2° 26′ 52″ |
| Space velocity (relative to the Sun) | 13.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.18). Visible from the whole Southern Hemisphere and north to latitude 88° N. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 848. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 21 million years.
The Sun seen from there
From a planet around HIP 664, the Sun would look like a star of magnitude 12.62, in the direction where our sky has the constellation Virgo. 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.