Both stars have surface temperatures of 3,820 K and less than 10% of the Sun’s luminosity.

Though Castor is designated as the alpha star of its constellation, it is, in fact, Pollux– Beta Geminorum – who is the brightest star.

Castor (Alpha Geminorum) is the second brightest star in the constellation Gemini and, in mythology, the twin of Pollux. Castor or Alpha Geminorum (Alp Gem) is the 2nd brightest naked eye star in the constellation Gemini.

However, this might also suggest that one or maybe both

Castor C is an eclipsing binary system, exhibiting variations in brightness as a result of the two components periodically eclipsing each other as they orbit. 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. Each component of the Alpha Geminorum system is in itself a spectroscopic binary star, which makes Castor a four-star system. Chapter 17 Solutions: 5.

Their estimated age is 370 million years.

Since brighter stars have lower magnitudes, if you choose to plot magnitude on the y-axis, the values will decrease as you go up!

Castor is a bright star in the constellation Gemini that, along with Pollux, is one of the two main guideposts for the asterism that is sometimes nicknamed "The Twins.". Star with planet.In northern spring evenings, the "twin" stars Castor and Pollux of the constellation Gemini descend the northwestern sky looking like a pair of eyes staring down at the Earth. The close pairing with Castor makies Pollux's color more vivid.

The star is considered to be similar to Fomalhaut. With an apparent magnitude of 1.58c, Castor is the 23rd brightest star in the entire sky (see: 50 Brightest Stars ). Castor Aa.

The stars, however, are quite different in detail. The star is estimated to have a mass 2.15 times that of our Sun, with a radius 2.3 times as great. Start training today! universeguide.com/star/castor. Challenge your mind with Lumosity, the #1 app with 60+ brain games for memory, math, vocabulary, and more. A Simple H-R Diagram. The primary star of the Castor B binary pair, Castor Ba, is a blue-white, main sequence star of spectral class A2-5 Vm.

Plot the luminosity on the y-axis with brighter stars going toward the top. Another distinction between the two stars is that while Pollux is a single star, Castor, on the other hand, is a multiple star system consisting of three spectroscopic binary pairs of stars. Pollux, which is slightly closer to us, is a single star, while Castor is a star system consisting of six stars.

The inverse square law applies to gravity as well as apparent brightness of a star. Its absolute magnitude is 0.59 and its distance is 52 light years. Castor is the 24th brightest star in the night sky and the 2nd brightest star in Gemini based on the Hipparcos 2007 apparent magnitude. Castor is a white quadruple star with fairly close hot white (spectral class A) components while Pollux an orange-colored cool (spectral type K0IIIb) giant.

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.

At a distance of 34 light years, the total luminosity is 46 times that of the Sun. Castor Ba is estimated to have a mass 1.7 times that of our Sun, and some 1.6 times its diameter.

The “b” indicates that the star is less luminous than average for its class. Castor’s Distance in Perspective: Castor is about 51 lightyears away. Castor is the second brightest star in Gemini and the 44th brightest star in the sky. The stars, however, are quite different in detail.

Challenge your mind with Lumosity, the #1 app with 60+ brain games for memory, math, vocabulary, and more. Castor is a bright star in the constellation Gemini that, along with Pollux, is one of the two main guideposts for the asterism that is sometimes nicknamed "The Twins.". Plot the luminosity on the y-axis with brighter stars going toward the top. The primary star of the Castor A binary pair, Castor Aa, is a main sequence blue-white star of spectral class A1 V, similar to Sirius. The brightest star in the constellation is normally given the Alpha designation although there are exceptions such as Pollux which is Beta ... Castor Luminosity. Castor and Pollux are the two "heavenly twin" stars giving the constellation Gemini (Latin, 'the twins') its name. Star type. 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. The two components are separated by 6” and have a revolution period of about 467 years. The light that we currently see from Castor left the star and began it’s journey towards Earth 51 years ago.

A Simple H-R Diagram.

They are twins only in mythology, these warriors, Pollux fathered by Zeus and divine, Castor mortal, both placed in the sky to allow them to be together for all time.

Castor and Pollux are the two 'heavenly twin' stars giving the constellation Gemini (Latin, 'the twins') its name.