The first pair, Zeta Cancri A and Zeta Cancri B, consists of yellow-white F-type main sequence dwarfs. Asellus Borealis – γ Cancri (Gamma Cancri). It marks the location of Praesepe (Messier 44), the famous open cluster, also known as the Beehive Cluster. Epsilon Cancri is the brightest member at magnitude 6.3. D'ailleurs, dans le langage courant, on dit qu'une personne souffrant d'un cancer a un "crabe". Cancer belongs to the Zodiac family of constellations, along with Aries, Taurus, Gemini, Leo, Virgo, Libra, Scorpius, Sagittarius, Capricornus, Aquarius, and Pisces. Cancer Constellation Map, by IAU and Sky&Telescope magazine. Eratosthenes extended this as Καρκινος, Ονοι, και Φατνη (Karkinos, Onoi, kai Fatne): the Crab, Asses, and Crib. The secondary is a white main sequence star of spectral type A3V and magnitude 6.57. ιA est une géante de magnitude 4,03 et de classe G7.5 et ιB une étoile naine ordinaire de magnitude 6,58 et de classe A3V. The galaxy was discovered by William Herschel in 1783. It was first detected at radio wavelengths during the course of the Ohio Sky Survey. [13] It is located 181 ± 2 light-years from Earth. Praesepe is also one of the larger open clusters visible; it has an area of 1.5 square degrees, or three times the size of the full Moon. Dès 2 000 ans avant notre ère, la plupart des civilisations la dénommaient Crabe ou une semblable créature à pinces. À la base, ζA et ζB, deux étoiles de magnitude 5,6 et 6, orbitent l'une autour de l'autre en 60 ans, éloignées de 19 ua. The brighter star in the system is suspected to be a very close binary itself, consisting of two stars separated by 0.1 arc seconds. Cancer contains a number of famous deep sky objects, among them the open cluster Praesepe, also known as the Beehive Cluster (Messier 44), the open cluster Messier 67, and the interacting spiral galaxies NGC 2535 and NGC 2536. The secondary is of magnitude 12.0 and is visible in small amateur telescopes. It lies in the second quadrant of the northern hemisphere (NQ2) and can be seen at latitudes between +90° and -60°. [8] Altarf represents a part of Cancer's body. Hence the system is a quadruple one. The Greeks and Romans identified the nebulous object as a manger from which two donkeys, represented by the neighbouring stars [1213] Asellus Borealis and [1210] Asellus Australis, were eating. [1] The German cartographer Johann Bayer used the Greek letters Alpha through Omega to label the most prominent stars in the constellation, followed by the letter A, then lowercase b, c and d.[4] Within the constellation's borders, there are 104 stars brighter than or equal to apparent magnitude 6.5.[a][6]. SN 1920A peaked at magnitude 11.7 in December 1920 and SN 2001bg was spotted in May 2001 and later peaked at magnitude 13.7. Cancer is the faintest of the 12 zodiac constellations. La dernière planète composant ce système solaire (55 Cnc e) fait environ 8.5 masses terrestres. Cancer is the faintest of the 12 zodiac constellations. It contains at least four stars. This is also the time that the Sun is directly overhead at 23.5°N, a parallel now known as the Tropic of Cancer.[1]. Ptolemy described the Beehive Cluster as "the nebulous mass in the breast of Cancer." L'étoile la plus brillante, Al Tarf (β Cnc), est très excentrée par rapport au reste de la constellation. [9] It spent much of its stellar life as a B-type main sequence star before expanding and cooling to its current state as it spent its core hydrogen. The ancient Chinese interpreted the object as a ghost or demon riding in a carriage, calling it a "cloud of pollen blown from under willow catkins. Les deux étoiles sont éloignées de plus de 2 800 ua et tourneraient l'une autour de l'autre en plus de 65 000 ans. YBP 1194 is a sunlike star in the open cluster M67 that has been found to have three planets. It contains two stars with known planets, including 55 Cancri, which has five: one super-earth and four gas giants, one of which is in the habitable zone and as such has expected temperatures similar to Earth. La deuxième pince du « crabe », Acubens (α Cancri), est dans l'alignement entre Procyon et (β Cnc). La constellation du Cancer fait partie des constellations du zodiaque, au nombre de 13, que le Soleil traverse en un an. It contains two stars with … La constellation abrite la nébuleuse planétaire Abell 31 ainsi que l'amas ouvert M44 appelé en latin Praesepe, ce qui signifie la Crèche (ou la Ruche, dénomination utilisée en anglais : beehive). Le mythe suppose, que Dionysos / Bacchus(Hyginus), que Héra / Junon avait rendu furieux, errait çàet là dans la Thesphrotie, cherchant à arriver au templede Zeus / Jupiter, à Dodone,afin d'en obtenir une répo… Cancer does not have any stars brighter than fourth magnitude. Tatouage signe astrologique cancer constellation ©Pinterest / TattooBlend Par Marie Talvat. The Alfonsine tables called it Carcinus, a Latinized form of the Greek word. Ses étoiles font penser à une mangeoire dans laquelle deux ânes mangent, ou à un essaim d'abeilles, d'où ses noms. Cancer constellation is located in the northern sky. Jakob Bartsch and Stanislaus Lubienitzki, in the 17th century, described it as a lobster. Il apparaît à l'œil nu comme une tache floue, la nébuleuse du crabe, à peine visible (ses composants sont de mag 6 à 7), mais on peut facilement distinguer ses composants à la jumelle. Beta Cancri is approximately 290 light years distant. Its estimated age is between 3.2 and 5 billion years. Pour ses efforts, à sa mort il fut envoyé par Héra dans la voûte céleste pour briller éternellement[3]. It is approximately 93 million light years distant. Also known as Altarf or Tarf,[7] Beta Cancri is the brightest star in Cancer at apparent magnitude 3.5. In Chinese astronomy, the stars of Cancer lie within the Vermilion Bird of the South (南方朱雀, Nán Fāng Zhū Què). [1] The primary is actually two very similar white main sequence stars that are 5.3 AU distant from each other and the secondary is two small main sequence stars, most likely red dwarfs, that are 600 AU from the main pair. When the crab tries to kill Hercules, Hercules kicks it all the way to the stars. [8] Located 290 ± 30 light-years from Earth,[9] it is a binary star system, its main component an orange giant of spectral type K4III that is varies slightly from a baseline magnitude of 3.53—dipping by 0.005 magnitude over a period of 6 days. In the equatorial coordinate system, the right ascension coordinates of these borders lie between 07h 55m 19.7973s and 09h 22m 35.0364s, while the declination coordinates are between 33.1415138° and 6.4700689°. The second pair, Zeta Cancri C and Zeta Cancri D, consists of a yellow G-type star and a 10th magnitude red dwarf separated by only 0.3 arc seconds. It can be seen at latitudes between +90° and -60° and is best visible at 9 p.m. during the month of March. The Delta Cancrids are the only meteor shower associated with the constellation. Cancer is best known among stargazers as the home of Praesepe (Messier 44), an open cluster also called the Beehive Cluster, located right in the centre of the constellation. It has an H II nucleus. Its name is Latin for crab and it is commonly represented as one. Cancer contains 10 named stars. Le deuxième couple est formée de deux étoiles naines de classe M, de magnitude 12, orbitant autour du premier couple à plus de 600 ua en plus de 6 300 ans. It has an apparent magnitude of 3.7 and its estimated age is 600 million years. Il s'agit d'une « super-terre ». Il y a 2000 ans, le Soleil y atteignait son solstice d'été avant de se remettre à décliner. Elle fait partie de la famille de constellation Zodiac. ", The smaller, denser open cluster Messier 67 can also be found in Cancer, 2600 light-years from Earth. Le Cancer est également un signe du zodiaque correspondant au secteur de 30° de l'écliptique traversé par le Soleil du 22 juin au 22 juillet. In Telugu it is "Karkatakam", in Kannada "Karkataka" or "Kataka", in Tamil Karkatan, and in Sinhala Kagthaca. In Greek mythology, Cancer is identified with the crab that appeared while Heracles fought the many-headed Hydra. They are separated by 1 arc second in the sky. Objects of magnitude 6.5 are among the faintest visible to the unaided eye in suburban-rural transition night skies. The more commonly used name, Asellus Australis, means “southern donkey colt” in Latin. Its astrological symbol is♋. Astacus and Cammarus appear in various classic writers, while it is called Nepa in Cicero's De Finibus and the works of Columella, Plautus, and Varro; all of these words signify crab, lobster, or scorpion. 55 Cancri is a double star that consists of a yellow main sequence dwarf belonging to the spectral class G8V and a 13th magnitude red dwarf that can only be seen through a telescope. NGC 2775 (Caldwell 48) – Based on observations made with the NASA and ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI, NASA), the Space Telescope European Coordinating Facility (ST-ECF, ESA) and the Canadian Astronomy Data Centre (CADC, NRC, CSA). Acubens est en fait un système multiple, constitué de deux couples d'étoiles distincts. Eh bien tout simplement parce que le mot cancer signifie "crabe" en latin. Cancer is a medium-sized constellation that is bordered by Gemini to the west, Lynx to the north, Leo Minor to the northeast, Leo to the east, Hydra to the south, and Canis Minor to the southwest. The brightest stars in the cluster are blue-white in colour and with magnitudes ranging between 6 and 6.5. The cluster is now known as Praesepe or, more popularly, the Beehive Cluster. Dante, alluding to this faintness and position of heavens, wrote in Paradiso: Winter would have a month of one sole day. Cancer is the second dimmest of the zodiacal constellations, having only two stars above the fourth magnitude. The star lies close to the ecliptic and can be occulted by the Moon and, rarely, by planets. [23], The Indian language Sanskrit shares a common ancestor with Greek, and the Sanskrit name of Cancer is Karka and Karkata. It has an apparent magnitude of 6.1. [14], Located 181 ± 2 light-years from Earth,[9] Alpha Cancri (Acubens) is a multiple star with a primary component an apparent white main sequence star of spectral type A5 and magnitude 4.26. Côté Ouest, les pattes sont plus désordonnées, et forment un éventail à partir de χ, ψ, μ et ζ Cnc. Beta Cancri is the brightest star in the constellation, with an apparent magnitude of 3.5. Cancer is one of the twelve constellations of the zodiac and is located in the Northern celestial hemisphere. Sa rotation sur elle-même est assez lente, il lui faut plus de deux ans pour l'accomplir. He put them next to a star cluster which the Greeks called the Manger (Phatne). It is one of the oldest open clusters known. Son nom grec καρκινος, karkinos fait plutôt référence à une écrevisse, terme repris en français par Diderot dans son encyclopédie[1],[2]. harvnb error: no target: CITEREFRidpathTirion2017 (, Centre de données astronomiques de Strasbourg, "A massive binary black-hole system in OJ 287 and a test of general relativity", "Biggest black hole in the cosmos discovered", The Deep Photographic Guide to the Constellations: Cancer, Warburg Institute Iconographic Database (over 300 medieval and early modern images of Cancer),, Articles containing potentially dated statements from 2002, All articles containing potentially dated statements, Creative Commons Attribution-ShareAlike License, This page was last edited on 12 October 2020, at 03:18. In another version, the crab gets crushed instead and Hera, a sworn enemy of Hercules, places it in the sky for its efforts. Delta Cancri is an orange giant with an apparent magnitude of 3.94. Cancer is one of the twelve constellations of the zodiac and is located in the Northern celestial hemisphere. Il s'agit d'une étoile géante orange de classe K, 53 fois plus grande que le Soleil et 660 fois plus brillante. 55 Cancri is notable because, as of 2010, astronomers have confirmed five extrasolar planets orbiting the primary star in the system, 55 Cancri A. The constellation was first catalogued by the Greek astronomer Ptolemy in the 2nd century. Elle était l’une des 48 constellations identifiées par Ptolémée. C'est l'étoile brillante située à peu près au croisement de l'axe défini par Castor et Pollux, et par les deux yeux … Il pourrait également s'agir des ânes qui portaient Dionysos et les Silènes à la bataille. Al Tarf est une étoile double, son compagnon de magnitude apparente 14 est une naine rouge située à 2 600 ua. [15], Zeta Cancri or Tegmine ("the shell") is a multiple star system that contains at least four stars located 82 light-years from Earth. In mythology, Cancer is associated with the crab in the story of the Twelve Labours of Heracles (represented by the Hercules constellation). Elle porte d'ailleurs la désignation α, bien qu'elle ne soit que la 4e étoile la plus brillante de la constellation. It has an area of approximately 0.5 square degrees, the size of the full Moon. Tatouage de constellation Cancer : Le Cancer est une personne très sensible qui a aussi de grandes qualités d'introspection. Le Cancer abrite aussi l'objet M67, d'une magnétude 6,90, il est à la limite du visible à l’œil nu mais peut être observé avec de simples jumelles. Le Cancer est une constellation du zodiaque traversée par le Soleil du 20 juillet au 10 août. In the Egyptian records of about 2000 BC it was described as Scarabaeus (Scarab), the sacred emblem of immortality. Zeta Cancri is a multiple star system approximately 83.4 light years from Earth. Acubens, Alpha Cancri, is only the fourth brightest star in Cancer. Cancer was the location of the Sun's most northerly position in the sky (the summer solstice) in ancient times, though this position now occurs in Taurus due to the precession of the equinoxes, around June 21. Il sera ressuscité par Poséidon en monstre géant pour servir son armée. [11] Its common name means "southern donkey". The cluster was discovered by the German astronomer Johann Gottfried Koehler in 1779. Des études récentes ont montré qu'une autre étoile, ζD, de magnitude 9,7, tourne autour de ζC, probablement en 17,6 ans, quoique son orbite soit vraisemblablement très perturbée. The brightest star in the constellation is Al Tarf, Beta Cancri. Showing but few stars, and its brightest stars being of only 4th magnitude, Cancer was often considered the "Dark Sign", quaintly described as black and without eyes. [24], The 41 additional constellations added in the 16th, 17th and 18th centuries. L'emplacement de la constellation est facile à trouver, mais il apparaît le plus souvent assez vide d'étoiles. Deux autres étoiles dans cette constellation portent un nom : Asellus Australis (δ Cancri) et Asellus Borealis (γ Cancri), Les Ânes du Sud et du Nord en latin, car ces deux étoiles sont proches de l'amas ouvert M44, ou Praesepe, dont le nom signifie la Crèche. Il est entouré par le Lynx au nord et l'Hydre et le Petit Chien au sud. Its symbol is ♋. There also appears to be a strong connection between the Babylonian constellation and ideas of death and a passage to the underworld, which may be the origin of these ideas in later Greek myths associated with Hercules and the Hydra. C'est l'une des pinces du « crabe ». It has an apparent magnitude of 4.66. Le Cancer est situé à l'est de Castor et Pollux, des Gémeaux, et à l'ouest de la tête du Lion reconnaissable à sa faucille. De magnitude 3,7, il est visible à l'œil nu. ζD est vraisemblablement une naine blanche, mais il est également possible qu'elle soit elle-même une étoile double. Its central supermassive black hole is among the largest known, with a mass of 18 billion solar masses,[16] more than six times the value calculated for the previous largest object. Le plus brillant est composé de deux étoiles identiques (des naines de classe Am), située à 5,3 ua l'une de l'autre et orbitant en 6,1 ans. The two brightest components are a binary star with an orbital period of 1100 years; the brighter component is a yellow-hued binary pair and the dimmer component is a yellow-hued star of magnitude 6.2. Son spectre est en effet enrichi en éléments métalliques, comme le zinc, le strontium, le baryum, etc. [17], Cancer was first recorded by Ptolemy in the 2nd century AD in Almagest, under the Greek name Καρκίνος (Karkinos).[18]. The Beehive Cluster is an open star cluster about 577 light years from Earth. This is one of the four known planetary systems known to have at least five planets. In Ancient Rome, Manilius and Ovid called the constellation Litoreus (shore-inhabiting). Its symbol is ♋. The constellation was first catalogued by the Greek astronomer Ptolemy in the 2nd century. Today, there are about 1010 high-probability members, most of them (68 percent) red dwarfs. CANCER (Nom latin : Cancer) Bien qu'elle soit encadrée par les majestueuses constellations du Taureau, d'Orion, des Gémeaux et du Lion, la constellation du Cancer n'en partage pas les splendeurs. L'étoile la plus brillante de la constellation du Crabe est Al Tarf (β Cancri), La Fin en arabe. Son âge et son mouvement propre est le même que celui de l'amas des Hyades, laissant penser qu'ils ont une origine commune. C'est à l'intérieur de ce carré qu'est situé l'amas ouvert M44, Praesepe, appelé l'essaim du Crabe. [1] It is most easily observed when Cancer is high in the sky. Albumasar writes of this sign in Flowers of Abu Ma'shar. The star is also notable for its less famous name, Arkushanangarushashutu, which is the longest of all the known star names. It is 180 light years distant. The Beehive Cluster (Messier 44) – Atlas Image mosaic obtained as part of the Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center, California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. Its name is Latin for crab and it is commonly represented as one. Le couple met plus de 76 000 ans pour effectuer une orbite complète. The brightest component, Alpha Cancri A, is a white A-type main sequence dwarf. La dernière modification de cette page a été faite le 20 août 2020 à 18:50. Le Cancer est une constellation du zodiaque traversée par le Soleil du 20 juillet au 10 août. The star has an eleventh magnitude companion, Alpha Cancri B. La primaire, γA, est de magnitude 4,66 et la secondaire, γB, est de magnitude 8,7. Messier 67 is an open cluster. Lambda Cancri is a blue-white B-type main sequence dwarf, approximately 419 light years distant. It is the second brightest star in Cancer. Delta and Gamma Cancri, the northern and southern donkey, are usually associated with an old Greek myth. Cancer est mieux vue en mars (des latitudes +90° à … North of the Equator, this period stretches from February to May. Asellus Australis est une géante rouge qui possède un compagnon de magnitude 11,9. In the myth, Hera sends the crab to distract Hercules while the hero is fighting the Lernaean Hydra, the serpent-like beast with many heads and poisonous breath, represented by Hydra constellation. The cluster is visible to the naked eye. NGC 2500 is a barred spiral galaxy, about 33 million light years distant, with an apparent magnitude of 12.2. [3] The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of 10 sides (illustrated in infobox). Alpha Cancri is a multiple star system located approximately 174 light years from Earth. [23], Athanasius Kircher said that in Coptic Egypt it was Κλαρια (Klaria), the Bestia seu Statio Typhonis (the Power of Darkness). It is one of the nearest and most populated open clusters to the solar system. La constellation du Cancer est représentée au-dessus du mont Triglav sur la pièce de 50 centimes d'euro émise par la Slovénie. It has multiple spiral arms with few HII regions, which means there was recent star forming activity occurring in it. Au nord on trouve ι Cnc, étoile brillante entre la tête des Gémeaux et celle du Lion. NGC 2608 is considered a grand design spiral galaxy. 55 Cancri possède un système planétaire avec quatre planètes confirmées. [10] An aging star, it has expanded to around 50 times the Sun's diameter and shines with 660 times its luminosity. [2] Covering 506 square degrees or 0.921% of the sky, it ranks 31st of the 88 constellations in size. Its name means “the crab” in Latin. Zeta Cancri is composed of two binary stars, Zeta-1 Cancri and Zeta-2 Cancri, separated by 5.06 arc seconds. The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Cnc". The neighboring constellations are Canis Minor, Gemini, Hydra, Leo, Leo Minor, and Lynx. M 44 contains about 50 stars, the brightest of which are of the sixth magnitude. The galaxy was discovered in the late 18th century by Friedrich Wilhelm Herschel. Hercules slew the crab after it bit him in the foot. L'étoile la plus brillante, Al Tarf (β Cnc), est très excentrée par rapport au reste de la constellation. Aussi Columellel'appelle l'Ecrévisse de Lerne, et sa place est aux cieux sur latête de cette Hydre (Hyginus). C'est l'étoile brillante située à peu près au croisement de l'axe défini par Castor et Pollux, et par les deux yeux de la tête de l'Hydre. Almost all the stars in the cluster are roughly at the same distance and of the same age (with the exception of 30 or so blue stragglers), which makes M67 one of the most observed and studied objects by those studying stellar evolution. Afterwards, the goddess Hera, an enemy of Heracles, placed the crab among the stars.[20]. More than a half of them (63%) are red dwarfs, and about a third (30%) of the stars are Sun-like, classified as F, G and K-class stars. Known as Asellus Borealis "northern donkey", Gamma Cancri is a white-hued A-type subgiant of spectral type A1IV and magnitude 4.67,[12] that is 35 times as luminous as of the Sun. OJ 287 is a BL Lacertae object located 3.5 billion light years away that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891. Le tatouage de cette constellation symbolise leur capacité d'attention et le désir de rendre heureux ceux qu'ils aiment. The Greek astronomer Ptolemy observed it and called it “the nebulous mass in the breast of Cancer.” Galileo was the first to see in through a telescope in 1609, and Charles Messier added the cluster to his catalogue in 1769. Its common name means "the claw". Quelques Grecs la connaissaient aussi sous le nom de Porte des Hommes, là d'où les âmes provenaient pour pénétrer les corps à la naissance. QSO J0842+1835 is a quasar used to measure the speed of gravity in VLBI experiment conducted by Edward Fomalont and Sergei Kopeikin in September 2002. They have an orbital period of 17 years. NGC 2535 is an unbarred spiral with an apparent magnitude of 16.9, while NGC 2536 is a barred spiral galaxy with a magnitude of 14.6. The close conjunction of Jupiter and Saturn in 1563— which was observed by Tycho Brahe and led him to note the inaccuracy of existing ephemerides and to begin his own program of astronomical measurements—occurred in Cancer not far from Praesepe. Located about 590 light-years from Earth, it is one of the nearest open clusters to our Solar System. Jérôme Lalande identified this with Anubis, one of the Egyptian divinities commonly associated with Sirius. As of 2002[update], the Sun appears in the constellation Cancer from July 20 to August 9. It is sometimes also known as Nahn. Delta Cancri also lies close to the ecliptic and can be occulted by the Moon and, however rarely, by planets.