Star · B9
π¹ Boo
π¹ Boo is a main-sequence star of spectral type B9 in the constellation Boötes, 315.6 light-years from the Sun.
| Other names | HIP 71762 |
|---|---|
| Constellation | Boötes |
| Distance | 315.6 light-years (96.8 pc) |
| Apparent magnitude | magnitude 4.49 |
| Absolute magnitude | magnitude −0.44 |
| Spectral type | B9 |
| Surface temperature | 10,150 K |
| Luminosity | 181 L☉ |
| Radius | 4.35 R☉ |
| Mass | 4.01 M☉ (estimated) |
| Right ascension (J2000) | 14h 40m 43.6s |
| Declination (J2000) | +16° 25′ 06″ |
| Space velocity (relative to the Sun) | 9.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.49). Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° 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 1710. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.6 million years.
The Sun seen from there
From a planet around π¹ Boo, the Sun would look like a star of magnitude 9.76, 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 71635 10.4 light-years
- HIP 71930 15.8 light-years
- HIP 70619 19.6 light-years
- HIP 72611 19.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.