⭐ Castor (star)
Castor (alpha Gem) is a A1V star at 51.6 light-years, magnitude 1.58, in the Twins constellation.
J2000 coordinates
| Hipparcos number: | HIP 34444 |
| Bayer designation: | alpha Gem |
| Constellation: | Twins (Gem) |
| Right Ascension (RA): | 113.649436° (07:34:36) |
| Declination (Dec): | 31.888278° |
| Visual magnitude: | 1.58 |
| Spectral type: | A1V |
| Distance: | 51.6 light-years |
Visible now?
In Sao Paulo (2026-05-01 05:24): altitude -80.5°, azimuth 27.0°. Below the horizon or very close to it now.
In Rio de Janeiro: altitude -78.3°, azimuth 38.1°.