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HR 3803 or N Velorum (N Vel) is a 3rd-magnitude star on the border between the southern constellations Carina and Vela. Based upon parallax measurements, it is approximately from Earth. It is an orange-hued K-type giant star and has twice the mass of the Sun.〔 The measured angular diameter of this star, after correction for limb darkening, is .〔 At the estimated distance of Eta Draconis,〔 this yields a physical size of about 29 times the radius of the Sun.〔 In 1752, French astronomer Nicolas Louis de Lacaille divided the former constellation Argo Navis into three separate constellations, and then referenced its stars by extending Bayer's system of star nomenclature;〔http://homepage.mac.com/andjames/Page206.htm〕 this star was given the designation ''N Velorum''. In 1871 Benjamin Apthorp Gould discovered this star to be variable, but this occurred prior to the standardization of variable star nomenclature by German astronomer Friedrich Wilhelm Argelander during the nineteenth century, so it does not fall into the standard range of variable star designations.〔 The star should not be confused with n Velorum. ==References== } \\ & \approx 58.7\cdot R_ \end〕 }} 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HR 3803」の詳細全文を読む スポンサード リンク
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