What luminosity class is Pollux?
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What luminosity class is Pollux?
Pollux, Beta Geminorum (β Gem), is an orange giant star located in the constellation Gemini. With an apparent magnitude of 1.14, it is the brightest star in Gemini and the 17th brightest star in the sky….Pollux – Beta Geminorum.
| Spectral class | K0IIIb |
|---|---|
| Dec.: 45.80 mas/yr | |
| Mass | 1.91 ± 0.09 M☉ |
| Luminosity | 43 L☉ |
| Radius | 8.8 ± 0.1 R☉ |
What type of stars are Castor and Pollux?
Castor and Pollux are the two “heavenly twin” stars giving the constellation Gemini (Latin, ‘the twins’) its name. The stars, however, are quite different in detail. Castor is a complex sextuple system of hot, bluish-white A-type stars and dim red dwarfs, while Pollux is a single, cooler yellow-orange giant.
Is Pollux a binary star?
Pollux is the 17th brightest star in the night sky and is the brightest star in Gemini based on the Hipparcos 2007 apparent magnitude. The star can be seen with the naked eye, that is, you don’t need a telescope/binoculars to see it. Pollux is a Binary or Multiple star system.
What is the absolute and apparent magnitude of Pollux?
1.14
Pollux/Magnitude
What type of star is Castor?
Castor C is a variable star, classified as a BY Draconis type. BY Draconis variables are cool dwarf stars which vary as they rotate due to starspots or other variations in their photospheres. The two red dwarfs of Castor C are almost identical, with masses around a half M ☉and luminosities less than 10% of the Sun.
What type of star is Vega?
A0V
Vega/Spectral type
What spectral type is Castor?
A1V
Castor has a spectral type of A1V, a surface temperature of 10,300° Kelvin and a luminosity 30 times the Sun. It has a mass of 2.2 solar masses and a diameter 2.3 times the Sun.
What are Castor and Pollux holding?
Castor and Pollux are consistently associated with horses in art and literature. They are widely depicted as helmeted horsemen carrying spears.
What elements are in Pollux?
Pollux is a red giant star that has exhausted its supply of hydrogen, and is now fusing helium into carbon and other elements. Like other red giants, this process causes Pollux to become cooler than our Sun — hence its orange color — and much larger: 10 times the diameter of the Sun.
What type of star is jishui?
Jishui is a Giant Star type star. Jishui is not part of the Gemini constellation outline but is within the borders of the constellation. Based on the spectral type (F3III) of the star, the star’s colour is yellow to white .
What is the composition of Pollux?
Along with Castor, Pollux is one of the two main guideposts for the asterism, which is sometimes nicknamed “the twins.” The star is a red giant that has finished fusing hydrogen in its core and is now fusing other lighter elements into heavier ones. The star has a temperature of 8,360 F (4,627 C).
How is Pollux classified?
Pollux is classified as a “K0 IIIb” star. The K0 means that it is somewhat cooler than then sun, with a surface color that is a light yellowish orange.
What type of star is Pollux?
Pollux is a Giant Star type star. Pollux is a main star in the constellation Gemini and makes up the constellation outline. Based on the spectral type (K0IIIvar) of the star, the star’s colour is orange to red .
What is the difference between Castor and Pollux?
Pollux, which is slightly closer to us, is a single star, while Castor is a star system consisting of six stars. Pollux is an evolved giant, orange in colour, with the stellar classification K0IIIb. The “b” indicates that the star is less luminous than average for its class.
What is the history of Pollux?
Pollux formed around 724 million years ago, most likely from a cloud of dust and gas. The gravity pulled together the swirling gas and dust to make the star that we see today as the brightest of the Gemini constellation. Though in the beginning, it is heavily implied that Pollux started off as a main-sequence star of spectral type A.
What is the parallax of Pollux?
In 2007, Hipparcos data was revised with a new parallax of 96.54000 which put Pollux at a distance of 33.79 light years or 10.36 parsecs. It should not be taken as though the star is moving closer or further away from Earth. It is purely that the distance was recalculated.