";s:4:"text";s:14954:"Richard Allen, in Star-names and Their Meanings, lists names for the constellation as follows: In Ancient Greece, Aratus called the crab Καρκινος (Karkinos), which was followed by Hipparchus and Ptolemy. 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°. It has an apparent magnitude of 3.7 and its estimated age is 600 million years. A quadrant is essentially a quarter of a circle, which allows astronomers to measure the altitude of objects above the horizon. The constellation can be found in the northeast section of the hemisphere near Leo and Gemini. [23], Athanasius Kircher said that in Coptic Egypt it was Κλαρια (Klaria), the Bestia seu Statio Typhonis (the Power of Darkness). It is the 31st largest constellation in the sky and can be located at latitudes between +90° and -60°. The cluster is now known as Praesepe or, more popularly, the Beehive Cluster. Image credit: NASA/ESA/Hubble/J. It is based on data obtained through five filters. Cancer in ancient times used to be the location of the sun’s most northerly position in the sky. It means “the southeast star in the Crab” in ancient Babylonian. The stars have an orbital period of 4.66 years. [13] It is located 181 ± 2 light-years from Earth. The cancer constellation is visible easily. Located at the center of the constellation is Praesepe(Messier 44), one of the closest open clusters to Earth and a popular target for amateur astronomers. You can see Cancer at latitudes between +90° and -60°. The primary is a yellow-hued G-type bright giant star of magnitude 4.0,[14] located 330 ± 20 light-years from Earth. It marks the location of Praesepe (Messier 44), the famous open cluster, also known as the Beehive Cluster. It is a medium sized constellation, 12 th constellation of Zodiac and is located on the elliptical plane, bordered by lynx to the north, Gemini to West, Leo to east and Leo minor to northeast, Canis minor to southwest and Hydra to south. Leo, Canis Minor, Cancer and the Bellatrix-Betelgeuse Axis. At magnitude 3.9 is Delta Cancri, also known as Asellus Australis. Located about 590 light-years from Earth, it is one of the nearest open clusters to our Solar System. NGC 2608 is considered a grand design spiral galaxy. The Xi Cancri system consists of Xi Cancri A, a yellow G-type giant with a magnitude of 5.16, and Xi Cancri B, a companion star located only 0.1 arc seconds away. It was one of the first objects Galileo observed with his telescope in 1609, spotting 40 stars in the cluster. Erastosthenes wrote that, in the war between the gods and the Giants that came after the clash with the Titans, the gods Hephaestus, Dionysus and several others rode on donkeys into battle. Dimensions: 505 square degrees. 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. 55 Cancri consists of a yellow dwarf and a smaller red dwarf, with five planets orbiting the primary star; one low-mass planet that may be either a hot, water-rich world or a carbon planet and four gas giants. 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. Cancer is a medium-size constellation with an area of 506 square degrees and its stars are rather faint, its brightest star Beta Cancri having an apparent magnitude of 3.5. It is located in the second quadrant of the northern hemisphere, NQ2. 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. The constellation of Gemini is located in the northern hemisphere, lying in the second quadrant of the northern hemisphere (NQ2), being visible at latitudes between +90 o and -60 o.. It is the second brightest star in Cancer. Cancer is a northern celestial hemispheric constellation. NGC 2775 is a spiral galaxy, approximately 55.5 million light years from Earth. at the winter solstice in very remote antiquity; but afterwards it was associated with the fourth month Duzu, our June–July, and was known as the Northern Gate of Sun[...]"[19]. The Beehive Cluster is also called Praesepe, which means “the manger” in Latin. 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. 55 Cancri A, classified as a rare "super metal-rich" star, is one of the top 100 target stars for NASA's Terrestrial Planet Finder mission, ranked 63rd on the list. Beta Cancri is the brightest star in the constellation, with an apparent magnitude of 3.5. Lambda Cancri is a blue-white B-type main sequence dwarf, approximately 419 light years distant. Cancer contains 10 named stars. It lies in the second quadrant of the northern hemisphere (NQ2… It has an area of approximately 0.5 square degrees, the size of the full Moon. It can be seen at latitudes between +90° and -60° and is best visible at 9 p.m. during the month of March. It is one of the oldest open clusters known. NGC 2608 is a barred spiral galaxy, 62,000 light years across, with an apparent magnitude of 13.01. It contains at least four stars. Cancer is a moderately sized constellation visible in the northern sky around February, and one of the twelve members of the zodiac. 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. Looking deep into the Universe, the NASA/ESA Hubble Space Telescope catches a passing glimpse of the numerous arm-like structures that sweep around this barred spiral galaxy, known as NGC 2608. [15], Zeta Cancri or Tegmine ("the shell") is a multiple star system that contains at least four stars located 82 light-years from Earth. It has multiple spiral arms with few HII regions, which means there was recent star forming activity occurring in it. NGC 2535 and NGC 2536 are spiral galaxies in Cancer that are interacting with each other. Manger ), the Sun can be found in the second quadrant of the zodiacal! 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