Castor is the second-brightest object in the constellation Gemini, carrying the Bayer designation Alpha Geminorum despite being about half a magnitude fainter than Beta Geminorum, known as Pollux. It appears as a single star to the naked eye but is actually a sextuple star system made up of three separate binary pairs, with an apparent visual magnitude of 1.58 making it one of the brightest stars in the sky.
Facts
Classification
Constellation In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikidata: Castor
- Wikidata Q13029, class allow-list match (w-wdresolver-0926)
- wikidata-q13029 Wikidata claim (w-bbfill-edspace5-0927)
View the Source2. Wikipedia: Castor (star)
Castor (star), Wikipedia - lead section, catalogue classification
Castor is the second-brightest object in the zodiac constellation of Gemini.
In Group: Triple and Higher-Order Star Systems, Lead sentence
Castor appears singular to the naked eye, but it is actually a sextuple star system organized into three binary pairs.
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