Star · F0V
HIP 66640
HIP 66640 is a main-sequence star of spectral type F0V in the constellation Boötes, 195.7 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 195.7 light-years (60.0 pc) |
| Apparent magnitude | magnitude 5.57 |
| Absolute magnitude | magnitude 1.68 |
| Spectral type | F0V |
| Surface temperature | 7,170 K |
| Luminosity | 18.2 L☉ |
| Radius | 2.76 R☉ |
| Mass | 2.08 M☉ (estimated) |
| Right ascension (J2000) | 13h 39m 34.6s |
| Declination (J2000) | +10° 44′ 47″ |
| Space velocity (relative to the Sun) | 41.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.57). Visible from the whole Northern Hemisphere and south to latitude 79° S. North of latitude 79° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1830. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.5 million years.
The Sun seen from there
From a planet around HIP 66640, the Sun would look like a star of magnitude 8.72, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 67115 7.53 light-years
- HIP 65711 10.1 light-years
- HIP 65646 11.4 light-years
- HIP 67673 12.1 light-years
- ULAS J132720.56+101138.5 14.5 light-years
- HIP 67470 16.0 light-years
- HIP 66989 16.0 light-years
- HIP 67379 16.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.