Английская Википедия:HD 74180

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HD 74180 is a binary star in the constellation Vela. It is approximately 3,200 light years from Earth. The primary component is a yellow-white F-type supergiant with a mean apparent magnitude of +3.81, with a 10th magnitude companion 37.5 arcseconds distant.

Файл:HD74180LightCurve.png

A light curve for HD 74180, adapted from van Leeuwen et al. (1998)

b Velorum has been classified as a suspected α Cygni variable star which varies by only 0.06 magnitude. There are possible periods near 53, 80, and 160 days, but the variation is largely irregular. It lies less than a degree from the small open cluster NGC 2645, but is not a member.

Several studies have considered b Velorum to be a highly luminous supergiant or hypergiant with an early F spectral type, for example F2 Ia⁺, F0 Ia, and F4 I. There were corresponding luminosity estimates of Шаблон:Solar luminosity. A 2015 study used the Barbier-Chalonge-Divan (BCD) system to derive a luminosity of Шаблон:Solar luminosity and a cooler less luminous F8 Ib spectral type.

Nomenclature

In Chinese, Шаблон:Lang (Шаблон:Lang), meaning Celestial Earth God's Temple, refers to an asterism consisting of Kappa Velorum, Gamma² Velorum, b Velorum and Delta Velorum. Consequently, Kappa Velorum itself is known as Шаблон:Lang (Шаблон:Lang), "the Fifth Star of Celestial Earth God's Temple".