Other bright stars that are examples of this include Achernar, Alderamin, Altair, Rasalhague, Regulus, and Vega.Īs another effect of the star’s fast rotation, a lot of material from the surface is ejected and forms a hot disk of gas. Its poles are closer to the centre of mass and therefore hotter and more luminous than the equatorial region. Like its neighbour Caph, Gamma Cassiopeiae is an example of gravity darkening. As a result, its equatorial radius is larger than its polar radius, giving the star a flattened shape. Gamma Cassiopeiae is an exceptionally fast spinner, with a projected rotational velocity of 432 km/s. Its high mass seals its fate as a supernova in the not-too-distant astronomical future. Like other exceptionally massive stars, it has evolved very quickly and will not live a very long life. The star’s estimated age is only 8 million years.Įven though it is a very young star, Gamma Cassiopeiae has already left the main sequence and is in the late stages of its existence. With a surface temperature of 25,000 K, it is 34,000 times more luminous than the Sun, but most of its output is in the invisible ultraviolet. Gamma Cassiopeiae has a mass 17 times that of the Sun and, as it ended its main sequence lifetime, it has expanded to a size of 10 solar radii. These lines are caused by a circumstellar disk of material lost from the star. The “e” suffix indicates hydrogen emission lines in the star’s spectrum. The star is running out of the supply of hydrogen in its core and is on its way to evolving into a giant. Gamma Cassiopeiae has the stellar classification B0.5 IVe, indicating a subgiant star appearing blue or blue-white in colour. It is one of the five stars that form Cassiopeia’s recognizable W asterism. Gamma Cassiopeiae lies at a distance of 550 light years from Earth. With an apparent magnitude that varies from 1.6 to 3.0, it sometimes outshines its neighbours Schedar, Caph and Segin to become the constellation’s brightest star. Informally known as Navi, it is one of the four brightest stars in Cassiopeia. In the Indian constellation system, Cassiopeia is known as ಕುಂತಿ (Kunti), a character from the Mahabharata.Gamma Cassiopeiae (γ Cas) is a spectroscopic binary star located in the constellation Cassiopeia. Poseidon and his brother Zeus decreed that Casseopia be placed in the sky as a constellation, and as punishment for being so conceited about her looks, she would suffer the humiliating position of being upside down in the sky during the fall of the year when her constellation is best seen. However, she was saved by Perseus, and Cetus was turned to stone. The people took Andromeda and chained her to a rock which projected out into the sea to be sacrificed to Cetus. He replied that if the beautiful Andromeda, Casseopia’s only daughter, were to be sacrificed to Cetus the destruction would stop. The people asked Poseidon if there were any other way to stop the destruction. Poseidon replied that if Casseopia would admit that his sea nymphs were indeed more beautiful than she, he would stop the monster. In an effort to stop this tremendous destruction, the people when to Poseidon and asked what could be done to stop this monster. This created great fear among the people of Casseopia’s country.
In his anger, he created a great sea monster, Cetus (also described as a great fish or whale), to ravage the seas, sinking ships, killing the sailors, and destroying towns and villages along the seacoast. Poseidon, the brother of Zeus and the god of the sea, took great offense at this statement, for he created the most beautiful beings ever in the form of his sea nymphs. Eventually, herboasting proclaimed that her beauty even exceeded that of the gods. As time went by, she began to say that she was the most beautiful woman in the world.
She boasted that she was the most beautiful woman in the kingdom. In classical mythology, Cassiopeia was queen of Ethiopia, wife of Cepheus and mother of Andromeda.Īccording to the Greeks, Queen Casseopia, was very beautiful. It contains more than twenty open clusters exceeding tenth magnitude, and a similar number of fifth magnitude stars. The plane of the Milky Way runs through the middle of the ‘W’ asterism, making it a particularly rich area of the sky to view through binoculars. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy It is highest in the sky at midnight in the months around September. Cassiopeia is one of the most recognizable of the constellations, a distinctive ‘W’ shape in the far northern sky.
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