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Rigel is a blue supergiant star in the constellation of Orion. It has the Bayer designation β Orionis, which is Latinized to Beta Orionis and abbreviated Beta Ori or β Ori. Rigel is the brightest and most massive component – and the eponym – of a star system of at least four stars that appear as a single blue-white point of light to the ...
Spring Triangle. The Spring Triangle with Arcturus, Spica, Regulus, and Denebola. The Spring Triangle is an astronomical asterism involving an imaginary triangle drawn upon the celestial sphere, with its defining vertices at Arcturus, Spica, and Regulus. [1] This triangle connects the constellations of Boötes, Virgo, and Leo.
KRI Spica (934) is the second hydro oceanographic auxiliary ship belonging to the Indonesian Navy which was built at the OCEA shipyard, Les Sables-d'Olonne, France, after her sister ship KRI Rigel (933) was completed. Spica is taken from the name of the brightest star in the constellation Virgo. [1]
Deneb rivals Rigel, a closer blue supergiant, as the most luminous first-magnitude star. However, its distance, and hence luminosity, is poorly known; its luminosity is somewhere between 55,000 and 196,000 times that of the Sun. Its Bayer designation is α Cygni, which is Latinised to Alpha Cygni, abbreviated to Alpha Cyg or α Cyg.
Spica is a polarimetric variable, first discovered to be such in 2016. [30] The majority of the polarimetric signal is the result of the reflection of the light from one star off the other (and vice versa). The two stars in Spica were the first ever to have their reflectivity (or geometric albedo) measured.
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Prominent examples of stars in this mass range include Antares, Spica, Gamma Velorum, [2] Mu Cephei, and members of the Quintuplet Cluster. [3] Type Ia supernova progenitors are white dwarf stars that are close to the Chandrasekhar limit of about 1.44 solar masses and are accreting matter from a binary companion star.
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