The AsterNym star registry
Castor
white · Gemini · α Gem
This star has no dedication yet. Its light is real, its coordinates are checkable — and its page is waiting for a name.
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About this star
Castor is a white star in the constellation Gemini, 51 ly from Earth. The light leaving it tonight began travelling 51 years ago — bright enough to find with your own eyes on a clear night.
- Designation
- α Gem · HIP 36850
- Spectral type
- A1 V · white
- Right ascension
- 07h 34m 36s
- Declination
- +31° 53′ 18″
- Magnitude
- 1.58 naked-eye
- Distance
- 51 ly
Coordinates are J2000 epoch, checkable against any astronomical source or planetarium app.