X Muscae-A Large Amplitude Red Variable

摘要

X Muscae is amongst the stars listed in the General Catalogue of Variable Stars as "not studied." Visual observations by the author during the five- year interval 1999 through 2003 indicate this is a large amplitude variable star, probably of the Mira type. A visual magnitude range of 12.2 to fainter than 15.0 is found with a mean cycle of 266 ± 7 days. A preliminary ephemeris for determining ( maximum brightness is JD 2452085+266 ± 7 E days.