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Encyclopedia > Coma star cluster

The Coma Cluster in Coma Berenices, designated Melotte 111 after its entry in the catalogue of deep sky objects by P. J. Melotte, is a small but nearby star cluster in our galaxy, containing about 40 stars (magnitude 5 to 10) with a common proper motion. It used to be known to represent Leo's tail, but Ptolemy III, in around 240 BC, renamed it for the Egyptian queen Berenice's sacrifice of her hair in a legend. The open cluster has a distance of 260 light years - almost as near as the Hyades - and covers an area of more than 5 degrees on the sky. In the FOV of a good field glass most of its stars can be seen simultaneously. Coma Berenices (Latin for Berenices Hair) is a traditional asterism that has since become a constellation. ... Deep sky object (DSO) is a term used often in amateur astronomy to denote objects in the night sky other than solar system objects (such as planets, comets and asteroids), single stars and multiple star systems. ... Philibert Jacques Melotte (January 29, 1880 – March 30, 1961) was a British astronomer whose parents immigrated from Belgium. ... An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... Leo (Latin for lion, symbol , Unicode ♌) is a constellation of the zodiac. ... Ptolemy III Euergetes I, (Ptolemaeus III) (Evergetes, Euergetes) (246 BC-222 BC). ... Hyades can refer to the mythological Hyades the open star cluster Hyades the italian thrash metal band This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. ... Your field of view is that part of the observable world that you are able to see at any given moment. ... Binoculars A set of binoculars (from Latin, bi-, two-, and oculus, eye) is a hand-held tool used to make distant objects appear closer by passing the image through two adjacent series of lenses, and erecting prisms. ...


Below are 2 images of Melotte 111, taken from a rural location in Derbyshire, United Kingdom in March 2003, exposed for about 30 seconds with a normal film camera. The brighter stars of the cluster make out a distinctive "V" shape as seen when Coma Berenices is rising. The slightly orange background is caused by light pollution coming from nearby cities. The right hand image is the same photo with labels added. The position of Gamma Comae Berenices is shown, as are the constellation outlines (orange), constellation boundaries (blue), and lines of equal right ascension and declination (green). Derbyshire (pronounced Dar-bee-shur) is a county in the East Midlands of England, which boasts some of Englands most attractive scenery. ... This photo of New York City shows excessive Sky glow, one form of light pollution, partly caused by many unshielded lights. ... Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ...


Image File history File links Comastarcluster. ... Image File history File links Comastarcluster2. ...


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