翻訳と辞書 Words near each other ・ Third Church ・ Third Church of Christ, Scientist ・ Third Church of Christ, Scientist (Cleveland, Ohio) ・ Third Church of Christ, Scientist (Washington, D.C.) ・ Thiramala ・ Thiranottam ・ Thiranthidu Seese ・ Thirappane Divisional Secretariat ・ Thiraseelakku Pinnil ・ Thiratoscirtus ・ Thiraucourt ・ Thirayattam ・ Thirayum Theeravum ・ Thirayuth Boonmee ・ Third ・ Third (angle) ・ Third (Big Star album) ・ Third (chord) ・ Third (curling) ・ Third (play) ・ Third (Portishead album) ・ Third (Soft Machine album) ・ Third A. K. Antony ministry ・ Third Abdullah cabinet ・ Third Act ・ Third Act Stories EP ・ Third Addition to Rockville and Old St. Mary's Church and Cemetery ・ Third Affiliated Hospital of XMU ・ Third Age (disambiguation) ・ Third Age Foundation Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Third (angle) ： ウィキペディア英語版 Minute and second of arc A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth () of one degree. As one degree is of a circle, one minute of arc is of a circle (or, in radians, ). It is used in fields that involve very small angles, such as astronomy, optometry, ophthalmology, optics, navigation, land surveying and marksmanship. The number of square arcminutes in a complete sphere is $4\; \backslash pi\; \backslash left(\backslash frac\backslash right)^2\; =\; \backslash frac\; =$ approximately 148,510,660 square arcminutes. A second of arc (arcsecond, arcsec) is of an arcminute, of a degree, of a circle, and (about ) of a radian. This is approximately the angle subtended by a U.S. dime coin (18mm) at a distance of .〔Filippenko, Alex, ''Understanding the Universe'' (of ''The Great Courses'', on DVD), Lecture 43, time 12:05, The Teaching Company, Chantilly, VA, USA, 2007〕 To express even smaller angles, standard SI prefixes can be employed; the milliarcsecond (mas), for instance, is commonly used in astronomy. ==Symbols and abbreviations== The standard symbol for marking the arcminute is the prime (′) (U+2032), though a single quote (') (U+0027) is commonly used where only ASCII characters are permitted. One arcminute is thus written 1′. It is also abbreviated as arcmin or amin or, less commonly, the prime with a circumflex over it ($\backslash hat$). The standard symbol for the arcsecond is the double prime (″) (U+2033), though a double quote (") (U+0022) is commonly used where only ASCII characters are permitted. One arcsecond is thus written 1″. It is also abbreviated as arcsec or asec. In celestial navigation, seconds of arc are rarely used in calculations, the preference usually being for degrees, minutes and decimals of a minute, written for example as 42° 25.32′ or 42° 25.322′.〔(【引用サイトリンク】url=http://www.kumquat-data.com/Astro%20Navigation%20Syllabus.htm )〕 This notation has been carried over into marine GPS receivers, which normally display latitude and longitude in the latter format by default.〔(【引用サイトリンク】url=http://norinco.co.in/NCMS/index.php?option=com_content&task=view&id=53&Itemid=81 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Minute and second of arc」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.