variants: or less commonly Ras Algethi \ ˈräs-​ˌal-​jə-​ˈtē , -​al-​ˈge-​thē \

Definition of Rasalgethi

: a group of stars of the third magnitude that is seen in the constellation Hercules Hercules resembles the constellation Orion but only has two stars along the belt (rather than three) and is not as bright as Orion but still recognizable. In Hercules, there is an interesting double star known as Rasalgethi, located above his head. — Chris Pagan, Tulsa World (Oklahoma), 5 June 2011

called also Alpha Herculis

Note: What is visible in the night sky as the star Rasalgethi is actually a group of three stars bound together gravitationally; one red giant and a binary system of a yellow giant and a yellow dwarf star.

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First Known Use of Rasalgethi

1780, in the meaning defined above

History and Etymology for Rasalgethi

borrowed from New Latin, borrowed from Arabic ra’s al-jāthī, literally, “head of the kneeling one”

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The first known use of Rasalgethi was in 1780

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Cite this Entry

“Rasalgethi.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Rasalgethi. Accessed 5 Mar. 2021.

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