⭐ 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 (2026-05-01 05:18): altitude -1.7°, azimuth 290.2°. Below the horizon or very close to it now.
In Rio de Janeiro: altitude -4.5°, azimuth 288.9°.