⭐ Arcturus (star)
Arcturus (alpha Boo) is a K1.5III star at 36.7 light-years, magnitude -0.05, in the Herdsman constellation.
J2000 coordinates
| Hipparcos number: | HIP 69673 |
| Bayer designation: | alpha Boo |
| Constellation: | Herdsman (Boo) |
| Right Ascension (RA): | 213.915300° (14:15:40) |
| Declination (Dec): | 19.182409° |
| Visual magnitude: | -0.05 |
| Spectral type: | K1.5III |
| Distance: | 36.7 light-years |
Visible now?
In Sao Paulo (2026-06-12 11:14): altitude -58.2°, azimuth 91.3°. Below the horizon or very close to it now.
In Rio de Janeiro: altitude -55.0°, azimuth 89.0°.