Cassiopée constellation. It was Poseidon who placed Cassiopeia and Cepheus in the sky. Cassiopeia (listen) is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivaled beauty. Elle fait partie du bras de Persée. NGC 457 is looser, and its brightest member is Phi Cassiopeiae, a white-hued supergiant star of magnitude 5.0. The only Delta Scuti variable brighter than Caph is Altair, the brightest star in the constellation Aquila and 12th brightest star in the sky. In Chinese astronomy, the stars forming the constellation Cassiopeia are found among three areas: the Purple Forbidden enclosure (紫微垣, Zǐ Wēi Yuán), the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ), and the White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ). It is easily recognizable due to its distinctive 'W' shape, formed by five bright stars. This new four-year partnership will allow e-POP to collect valuable space weather data at a rate 3-4 times greater than has been done previously. It is notable for being the brightest astronomical radio source in the sky. The five brightest stars of Cassiopeia – Alpha, Beta, Gamma, Delta, and Epsilon Cassiopeiae – form the characteristic W-shaped asterism. [5], In Welsh Mythology Llys Dôn (literally "The Court of Dôn") is the traditional Welsh name for the constellation. Alpha Cassiopeiae is located at the bottom right of the W asterism. La constellation de Cassiopée Cassiopée (Cassiopeia) , appelée aussi la Chaise ou le Trône , est un une constellation boréale, qui se trouve toujours en opposition à la Grande Ourse , … The explosion occurred at an approximate distance of 11,000 years from Earth and the first light of the supernova is believed to have reached us about 300 years ago. In the sky, the main stars of Cassiopeia form a W shape, which is easy to recognize, but does not really look anything like a person sitting in a chair. Traductions en contexte de "constellation de Casssiopée" en français-anglais avec Reverso Context : Le nom traditionnel pour Alpha Cassiopée, l'étoile la plus au sud de la constellation de Casssiopée. IC 10 is an irregular galaxy that is the closest known starburst galaxy and the only one in the Local Group of galaxies. 2011-08-02 00-32-00-constellations.jpg 3.201 × 5.745; 15,94 MB. She was the wife of King Cepheus and the mother of Princess Andromeda. This is giving the star an oblate spheroid shape with an equatorial bulge that is 24% larger than the polar radius. However, its most prominent member, the double star Phi Cassiopeiae, is far closer – between 1000 and 4000 light-years away. She is usually depicted on her throne, still combing her hair. It is 13 arc minutes (19 light years) in diameter. The yellow-white star is classified as a semi-regular variable. Join Facebook to connect with Cassiopée Constellation and others you may know. celestron.com. It has an active galactic nucleus (AGN). Zeta Cassiopeiae is a blue-white subgiant (spectral type B2IV), approximately 600 light years distant. Iota Cassiopeiae is a triple star 142 light-years from Earth. [5], The people of the Marshall Islands saw Cassiopeia as part of a great porpoise constellation. M103 is far poorer than M52, with only about 25 stars included. Zeta Cassiopeiae is classified as a SPB variable star (Slow Pulsating B star), the first one of its kind discovered to have a magnetic field. Kappa, Eta, and Mu Cassiopeiae formed a constellation called the Bridge of the Kings; when seen along with Alpha and Beta Cassiopeiae, they formed the great chariot Wang-Liang. There was a fight and Perseus, desperately outnumbered, used the head of Medusa, the monster he had recently slain, to defeat his opponents. Objects of magnitude 6.5 are among the faintest visible to the unaided eye in suburban-rural transition night skies. [5], Other cultures see a hand or moose antlers in the pattern. Achird has a dimmer companion, an orange K-class dwarf with an apparent magnitude of 7.51, located 11 arc seconds away. Cassiopeia has three stars with known planets and contains two Messier objects: M103 (NGC 581) and M52 (NGC 7654). The cluster was discovered by Charles Messier in 1774. It is a spectroscopic binary, with an orbital period of 203.59 days and a companion with a calculated mass about the same as the Sun. However, no direct evidence of this companion has been found, leading to speculation that it might be a white dwarf or other degenerate star. Cassiopée est une des 88 constellations visible dans l'hémisphère nord. The cluster was discovered in 1787 by William Herschel. In the (sub)tropics it can be seen at its clearest from September to early November, and at low southern, tropical, latitudes of less than 25°S it can be seen, seasonally, low in the North. Cassiopée (mythologie) Dans la mythologie grecque, épouse orgueilleuse de Céphée et mère d'Andromède, reine d'Éthiopie. The Heart Nebula and the Soul Nebula are two neighboring emission nebulae about 7,500 light-years away. It was discovered by the British astronomer Caroline Herschel in 1783. The galaxy is classified as a type 2 Seyfert galaxy. Seiten in der Kategorie „Cassiopeia (constellation)“ Diese Kategorie enthält nur die folgende Seite. The shower's parent body is a Jupiter family comet, though its specific identity is unknown.[39]. It has an apparent magnitude of 3.45. The primary is a yellow-hued star of magnitude 3.5 and the secondary is a red-hued star of magnitude 7.5. It was named after Cassiopeia, the vain and boastful queen in Greek mythology. NGC 185 is a magnitude 9.2 elliptical galaxy of type E0, 2 million light-years away. It undergoes enormous outbursts roughly every 50 years, resulting in change in luminosity. Camera : Canon EOS 500D Lens : Canon EF-S 18-55mm f/3.5-5.6 IS II _astrorel_, Lyon. Alpha Cassiopeiae was called Poloahilani, Beta Cassiopeiae was called Polula, and Gamma Cassiopeiae was called Mulehu. [14] Within the constellation's borders, there are 157 stars brighter than or equal to apparent magnitude 6.5.[d][10]. [5], Another Arab constellation that incorporated the stars of Cassiopeia was the Camel. Its luminosity varies between magnitudes 4.75 and 5.5. Barnard in 1883. The constellation hosts some of the most luminous stars known, including the yellow hypergiants Rho Cassiopeiae and V509 Cassiopeiae and white hypergiant 6 Cassiopeiae. of Alaska, T.A.Rector. In France, she was portrayed as having a marble throne and a palm leaf in her left hand, holding her robe in her right hand. Ptolemy cataloged Cassiopeia and other constellations in the Perseus family in the 2nd century. [34], NGC 457 is another open cluster in Cassiopeia, also called the E.T. NGC 281 is an H II region, a large gas cloud in which star formation has recently taken place. The Nereids were the 50 sea nymphs fathered by the Titan Nereus. They were enraged by Cassiopeia’s comments and appealed to Poseidon to punish Cassiopeia for her boastfulness. Its most prominent member is an orange-hued star of magnitude 8.0 near the cluster's edge. Andromeda was then rescued by the hero Perseus, whom she later married. Messier 52 is an open cluster, approximately 5,000 light years distant. [5], A figure called the "Tinted Hand" also appeared in the stars of Cassiopeia in some Arab atlases. Gamma Cassiopeiae is the central star in the W shape and currently the brightest star in the constellation. It has an apparent magnitude of 5.0 and can be seen with binoculars. The star’s other traditional names are al-Sanam al-Nakah and al-Kaff al-Khadib. Poseidon was married to one of the nymphs, Amphitrite. One look at Medusa’s head turned them all into stone. Segin – ε Cassiopeiae (Epsilon Cassiopeiae). The Chinese astronomers saw several figures in what is modern-day Cassiopeia. Covering 598.4 square degrees and hence 1.451% of the sky, Cassiopeia ranks 25th of the 88 constellations in area. As a result of this location in the Zone of Avoidance, both are surprisingly faint despite both being within 10 million light-years away (Maffei 2 is below the range of most amateur telescopes). It is a suspected variable star. Cassiopeia A is a supernova remnant and the brightest extrasolar radio source in the sky at frequencies above 1 GHz. 2011-06-15 23-50-00-stars.jpg 4.216 × 5.425; 22,47 MB. Together with the stars Alpheratz in Andromeda and Algenib in Pegasus, Caph was known as one of the Three Guides; three bright stars marking the equinoctial colure, the imaginary line from Caph to Alpheratz to the celestial equator, at a point where the Sun crosses it at each spring and autumn equinox. It is approximately 11,650 light years distant and one of the most luminous stars known. It has an apparent magnitude of 3.67. Le styliste commente son défilé, sorte de voyage intersidéral. The system’s brightness varies by 0.05 magnitudes. Cassiopeia contains several notable deep sky objects, among them the open clusters Messier 52 and Messier 103, the Heart Nebula and the Soul Nebula, the supernova remnant Cassiopeia A, the star-forming cloud popularly known as the Pacman Nebula, and the White Rose Cluster. Located 410 ± 20 light-years from Earth,[16] it is a hot blue-white star of spectral type B3 III with a surface temperature of 15,680 K. It is 6.5 times as massive and 4.2 times as wide as the Sun, and belongs to a class of stars known as Be stars—rapidly spinning stars that throw off a ring or shell of matter.[23]. Dans ce doux pays baigné de Soleil, la reine Cassiopée, très prétentieuse, se proclamait même plus belle u’Aphrodite, la déesse de l’Amour (Vénus). [5] In Hawaii, Alpha, Beta, and Gamma Cassiopeiae were named. Schedar (Shedir) – α Cassiopeiae (Alpha Cassiopeiae). We are pleased to announce that CASSIOPE/e-POP has become part of the European Space Agency’s (ESA) Swarm mission, via the Third Party Mission programme at ESA. Gefällt 730 Mal. [4] She was forced to wheel around the North Celestial Pole on her throne, spending half of her time clinging to it so she does not fall off, and Poseidon decreed that Andromeda should be bound to a rock as prey for the monster Cetus. The arm is made up of the stars α Per, γ Per, δ Per, ε Per, η Per, and ν Per. The star rotates very rapidly and bulges outward along the equator. [31] The two massive stars are so close to each other they distort each other into egg-shapes.[32]. The neighboring constellations are Andromeda, Camelopardalis, Cepheus, Lacerta, and Perseus. The star was used as a navigational reference point by astronauts. NGC 185 is a dwarf spheroidal galaxy, approximately 2.08 million light years from Earth. Psi Cassiopeiae is a triple star 193 light-years from Earth. Cassiopeia is a large constellation located in the northern sky. It has an apparent magnitude of 6.7. [8] These include the Lapps, for whom the W of Cassiopeia forms an elk antler. Two Messier objects, M52 (NGC 7654) and M103 (NGC 581), are located in Cassiopeia; both are open clusters. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. La Constellation Livresque de Cassiopée ... "Le clocher de Noël et autres crimes impossibles" présenté par Roland Lacourbe. Philippe. It is around 1.9 times as massive as the Sun, and around 21.3 times as luminous. [28] It has a minimum magnitude of 6.2 and a maximum magnitude of 4.1; its period is approximately 320 days. Rho Cassiopeiae is 550,000 times brighter than the Sun, with an absolute magnitude of -7.5. Ruchbah – δ Cassiopeiae (Delta Cassiopeiae). Its apparent magnitude varies from 4.1 to 6.2. Cassiopeia; Medien in der Kategorie „Cassiopeia (constellation)“ Folgende 96 Dateien sind in dieser Kategorie, von 96 insgesamt. Its traditional name is derived from the Arabic kaf, which means “palm” (i.e. The star’s traditional name, Ruchbah, comes from the Arabic rukbah, which means “the knee”. In the northern skies (recognizable from its W shape) is the familiar constellation of Cassiopeia, one of the 48 traditional constellations [27] Theta Cassiopeiae, named Marfak, is a suspected variable star whose brightness changes by less than a tenth of a magnitude. Though they do not appear in Andromeda, both dwarf galaxies are gravitationally bound to the far larger Andromeda Galaxy. NGC 457 is fairly rich; it is a Shapley class e and Trumpler class I 3 r cluster. Upsilon was later found to be two stars and labelled Upsilon1 and Upsilon2 by John Flamsteed. C'est une constellation circumpolaire, très facilement reconnaissable grâce à sa forme de « W ». Cassiopeia is one of the 88 modern constellationswe see today. [29] Between 240,000 and 270,000 times as luminous as the Sun, it is around 9,160 light-years distant from Earth. It was observed in 1572 by Tycho Brahe and now exists as a bright object in the radio spectrum. The stars, from left to right, are Segin (Epsilon Cassiopeiae), Ruchbah (Delta Cassiopeiae), Gamma Cassiopeiae, Schedar (Alpha Cassiopeiae), and Caph (Beta Cassiopeiae). It also hosts the red supergiant PZ Cassiopeiae, which is one of the largest known stars with an estimate of 1,190–1,940 R☉ and is also a semiregular variable. [20], Gamma Cassiopeiae is the prototype Gamma Cassiopeiae variable star, a type of variable star that has a variable disc of material flung off by the high rotation rate of the star. [22], The other prominent open clusters in Cassiopeia are NGC 457 and NGC 663, both of which have about 80 stars. It is the fourth brightest star in the constellation. It was originally discovered by John Herschel in 1829. Numele tradiţional pentru Alfa Casiopeea, cea mai sudică stea a Constelaţiei Casiopeea. Cassiopeia belongs to the Perseus family of constellations, along with Andromeda, Auriga, Cepheus, Cetus, Lacerta, Pegasus, Perseus, and Triangulum.

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