Star · F7 V
τ Boo
τ Boo is a main-sequence star of spectral type F7 V in the constellation Boötes, 50.9 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | tau Boo · Gl 527A · HIP 67275 |
|---|---|
| Constellation | Boötes |
| Distance | 50.9 light-years (15.6 pc) |
| Apparent magnitude | magnitude 4.50 |
| Absolute magnitude | magnitude 3.53 |
| Spectral type | F7 V |
| Surface temperature | 6,470 K |
| Luminosity | 3.2 L☉ |
| Radius | 1.43 R☉ |
| Mass | 1.32 M☉ |
| Age | 2.0 billion years |
| Metallicity [Fe/H] | 0.26 |
| Right ascension (J2000) | 13h 47m 15.8s |
| Declination (J2000) | +17° 27′ 25″ |
| Space velocity (relative to the Sun) | 38.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.50). Visible from the whole Northern Hemisphere and south to latitude 73° S. North of latitude 73° 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 1975. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 903 thousand years.
The Sun seen from there
From a planet around τ Boo, the Sun would look like a star of magnitude 5.80, in the direction where our sky has the constellation Cetus. It would be visible to the naked eye.
Planets
- tau Boo b 3.31-day orbit · 12.8 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.