czsky/en/star/hr546.md

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name constellation created_by created_date updated_by updated_date
Mesarthim (γ Arietis) Ari editor.cs 2023-11-05 17:29:52.128521 editor.cs 2023-11-05 17:29:52.128525

A charming double star, composed of blue-white components with magnitudes 4.7 and 4.8, separated by 7.8", which can be resolved with a 5 cm telescope. Mesarthim is visible to the naked eye as a star with magnitude 3.9. Historically, it is interesting because it was one of the first double stars discovered by a telescope, observed by the English naturalist Robert Hooke in 1664 while observing a comet. It is located 204 light-years away.