Iota Andromedae is a B-type main sequence dwarf, bluish white in colour. Located north of the celestial equator, it is named for Andromeda, daughter of Cassiopeia, in the Greek myth, who was chained to a rock to be eaten by the sea monster Cetus. Alpheratz is a binary star with an apparent magnitude of +2.06. The constellation of Andromeda is best known for the Andromeda Galaxy, M31, one of the most famous objects in the sky, which can most easily be … Andromeda constellation is located in the northern sky, between Cassiopeia’s W asterism and the Great Square of Pegasus. The three other stars that form the square are Alpha, Beta and Gamma Pegasi (Markab, Scheat, and Algenib respectively). The parent body of the Andromedids is Biela’s Comet (3D/Biela), a periodic comet first recorded in 1772. When the king sought advice from the Oracle of Ammon on how to prevent complete destruction of his lands, he was told that the only way to appease the gods and nymphs was to sacrifice his daughter to Cetus. Which planets do not have a natural satellite? Titawin, Upsilon Andromedae (spectral class F8V), has four planets in its orbit. Mirach and NGC 404, The Ghost of Mirach, photo by NASA. Mirach is part of an asterism called the girdle. The constellation was named after the mythical princess Andromeda, the daughter of Queen Cassiopeia and wife of the Greek hero Perseus. It is shared with Pegasus, although it's not formally part of that constellation. NGC 891 is an edge-on spiral galaxy which can be seen four degrees east of Almach (Gamma Andromedae). It is believed to contain an intermediate-mass black hole in its centre. The main members of the NGC 68 Group are the galaxies NGC 68, NGC 67, NGC 67a, NGC 69, NGC 70, NGC 71, NGC 72, NGC 72a, and NGC 74. Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy and remains one of the 88 modern constellations. This website uses cookies to improve your experience while you navigate through the website. Andromeda is located directly next to Cassiopeia, and is also connected to a boxy shape of stars that make up the constellation Pegasus. Alpheratz was once considered to be part of the Pegasus constellation. The galaxy has an apparent magnitude of 10.8 and is located at an approximate distance of 27.3 million light years from Earth. Andromeda, in astronomy, constellation of the northern sky at about one hour right ascension and 40° north declination. The cluster has twice the mass of Omega Centauri, the largest globular cluster in the Milky Way. It is 2,000 times more luminous than the Sun. Both of its traditional names, Alpheratz and Sirrah, are derived from the Arabic phrase al surrat al-faras, which means “the navel of the horse.” The horse refers to Pegasus. Ross-248 (Gliese 905) is the 10th closest star to Earth at 10.3 light years. This article was most recently revised and updated by, https://www.britannica.com/place/Andromeda-constellation, European Southern Observatory - The Constellation Andromeda, Andromeda - Children's Encyclopedia (Ages 8-11), Andromeda - Student Encyclopedia (Ages 11 and up). Mirach is located only seven arcminutes from the galaxy NGC 404. The brightest star in Andromeda is Alpheratz, Alpha Andromedae. NGC 891 was discovered by William Herschel on October 6, 1784. Andromeda has three stars brighter than magnitude 3.00 and three stars located within 10 parsecs (32.6 light years) of Earth. NGC 93 has a visual magnitude of 14.34 and occupies an area 1.4’ x 0.7’ in size. Its most notable feature is the great Andromeda Galaxy, one of the nearest galaxies to Earth and one of the few galaxies visible to the unaided eye. NGC 68 Group, image: Adam Block/Mount Lemmon SkyCenter/University of Arizona. The galaxy contains a trillion stars. The constellation Andromeda contains nine named stars. NGC 90 (centre) and NGC 93 (top right). In Greek mythology, Andromeda was the daughter of King Cepheus of Ethiopia and Queen Cassiopeia, who offended the Nereids (sea nymphs) by claiming she was more beautiful than they were. Messier 32 was the first elliptical galaxy ever discovered. In the 1920s, the Andromeda Galaxy was known as the Andromeda Nebula, and for a long time, astronomers thought it was a nebula inside our own galaxy. Andromeda is the largest of the group. NGC 7686 is an open cluster with an apparent magnitude of 5.6. The primary star is a class K bright giant. The cluster is located about 130,000 light years from M31’s core and is the brightest globular cluster in the Local Group of galaxies. Andromeda constellation is attached to Pegasus the flying horse in the sky. It occupies an area 1.7’ x 1.4’ in size. NGC 404 has an apparent size of 3.5’ x 3.5’. Messier 32, a dwarf elliptical galaxy approximately 2.65 million light years distant, was originally discovered by the French astronomer Guillaume Le Gentil in 1749. The galaxy is suspected to have been much larger at one point, but then lost its outer stars and globular clusters when it collided with the Andromeda Galaxy. Mayall II. Along with Messier 110, Messier 32 is the closest bright elliptical galaxy to our solar system. The central star is a bluish dwarf with an estimated temperature of 75,000 K. The nebula’s estimated radius is 0.8 light years. Messier 110, Atlas Image courtesy of 2MASS/UMass/IPAC-Caltech/NASA/NSF. Mirach is a red giant lying about 200 light-years away, located at the foot of a trio of stars that appear to lead to Andromeda's most famous deep-sky object: the Andromeda Galaxy. Pi Andromedae is another binary star, approximately 660 light years distant. The star names approved by the International Astronomical Union (IAU) are Adhil (Xi Andromedae), Almach (Gamma Andromedae A), Alpheratz (Alpha Andromedae Aa), Buna (HD 16175), Mirach (Beta Andromedae), Nembus (51 Andromedae), Sterrennacht (HAT-P-6), Titawin (Upsilon Andromedae A), and Veritate (14 Andromedae A). M32 does not contain any globular clusters. It is 900 light years distant. Andromeda is part of the Perseus group of constellations which also includes Cassiopeia and Pegasus. Messier 110 was observed and described by Charles Messier in 1773 together with the Andromeda Galaxy and other objects he discovered, but M110 was not included on his original list of objects. Andromeda has at least 14 dwarf galaxies orbiting it, including M32 and M110. Our editors will review what you’ve submitted and determine whether to revise the article. The group is located at an approximate distance of 300 million light years. It has a supermassive black hole in its centre. The cluster was named after the American astronomer Nicholas Mayall, who discovered it with O.J. The primary star, Upsilon Andromedae A, has four planets in orbit, presumed to be Jovian planets (similar to Jupiter). The Andromedids meteor shower which occurs every November is named after Andromeda as it appears to emanate from the constellation. They can be clearly seen here against the bright background of the galaxy halo, expanding into space from the disc of the galaxy. It occupies an area 0.4’ by 0.2’ in size, which translates into a real size of 35,000 light years. Andromeda Constellation Andromeda is one of the oldest and most widely recognized constellations that shows up in the northern hemisphere and is a part of the family of Perseus, Cepheus, and Cassiopeia. Only 11.7 light years distant, it is one of the closest double stars to the Sun. The most famous deep sky object in the northern hemisphere sky is the Andromeda Galaxy, also known as M31. The name Mirach is a corrupted derivation from the Arabic word for “girdle,” mizar, referring to the star’s placement at Andromeda’s left hip. It can be seen in small telescopes. Because of its northern decli… The triple star Kappa Andromedae (B9IVn) has one confirmed exoplanet about 13 times the mass of Jupiter, first discovered in November 2012.

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