40 Eridani

40 Eridani, in short terms, 40 Eri and named as Keid,[1] is a triple star system in the constellation of Eridanus, it is located about 16.3 light-years away from the Sun.

The main star of the system, 40 Eridani A (Keid A) is easily visible to the naked eye. It is orbited by a binary star, two stars orbiting each other and both of them orbiting the main star. The star system was discovered on January 31, 1783, by astronomer William Herschel.[2]

References

  1. ↑ "Naming Stars". IAU.org. Archived from the original on 11 April 2020. Retrieved 16 December 2017.
  2. ↑ Herschel, William (1785). "Catalogue of Double Stars. By William Herschel, Esq. F. R. S". Philosophical Transactions of the Royal Society of London. 75: 40–126. Bibcode:1785RSPT...75...40H. doi:10.1098/rstl.1785.0006. JSTOR 106749. S2CID 186209747.
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