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	Norman Robert Pogson - Wikipedia, the free encyclopedia
		Norman Robert Pogson (March 23, 1829 – June 23, 1891) was a British astronomer.
		His suggestion in 1856 was to make this a standard, so each decrease in magnitude represented a decrease in brightness equal to the fifth-root of 100 (or about 2.512).
		The Pogson Ratio became the standard method of assigning magnitudes.
	en.wikipedia.org /wiki/Norman_Robert_Pogson (282 words)

	Astro-Fact (Site not responding. Last check: 2007-10-19)
		Norman Robert Pogson was a British astronomer, born in 1829.
		But his best known achievement is his Pogson's Ratio, devised in 1854 to define stellar magnitudes.
		It was known that first magnitude stars are about 100 times brighter than sixth magnitude stars, so Pogson proposed that each magnitude interval should correspond to a brightness ratio of exactly 2.512.
	ottawa.rasc.ca /articles/rush_carmen/astro_facts/nr_pogson.html (117 words)

	Norman Robert Pogson - {{ᏏᏖᎾᎺ}} (Site not responding. Last check: 2007-10-19)
		Norman Robert Pogson (ᎠᎾᏱᎵᏒ 23, 1829 – ᏕᎭᎷᏱ 23, 1891) ᏥᏄᏍᏛᎩ ᎩᎵᏏ ᎡᎶᎯ.
		ᎭᏫᎾᏗᏢ 1868 ᎠᎴ 1871, Pogson ᎤᎾᏖᎳᏛᎩ ᎯᎠ ᎠᏴᏫᏯ ᎡᎶᎯ ᎤᏂᎪᏗᏗ ᎥᎢᏒᎢ.
		Pogson, MNRAS 17 pp 12 1856 ᎭᏫᎾᏗᏢ ᎦᏙ ᎤᏍᏗ Pogson ᎢᎬᏱ ᎬᏂᎨᏒ ᏄᏩᏁᎸ ᎤᏤᎵ ᎢᎦᎢ iyahdvnelidasdi
	www.wikigadugi.org /wiki/Norman_Robert_Pogson (254 words)

	Universe Today » Archive » Astrophoto: Van den Bergh 152 by Giovanni Benintende
		Norman Robert Pogson was a British astronomer born in Nottingham, England on March 23, 1829.
		Pogson was the first to notice that stars of the first magnitude were about a hundred times as bright as stars of the sixth magnitude.
		Regardless, the Pogson Ratio became the standard method of assigning magnitudes based on the apparent brightness of stars seen from Earth and over time, as instruments improved, astronomers were able to further refine their designations so that fractional magnitudes also became possible.
	www.universetoday.com /2006/11/24/astrophoto-van-den-bergh-152-by-giovanni-benintende (1884 words)

	IIA > History of IIA (Site not responding. Last check: 2007-10-19)
		This and the 8 inches aperture equatorial telescope by Troughton and Simms of London, got in 1866, were the main instruments with which Norman Robert Pogson (1829-91) discovered from Madras five minor planets and six variable stars.
		After Pogson's death the 8 inches telescope fell increasingly into disuse, till it was rehabilitated in 1960 at Kodaikanal (in the south dome).
		It was at the 1872 eclipse that the spectrum of the chromosphere (the flash spectrum) was recorded, by Pogson, the first time ever at an annular eclipse.
	www.iiap.res.in /history.html (1063 words)

	NDIII Abstracts
		As part of a larger project on the history of the University of Michigan Observatories, this is a study of W. Hussey's southern station, intended for the discovery and measurement of double stars.
		Insofar as Norman Robert Pogson is ever mentioned in the history of astronomy it is in connection with his 1856 proposal for a stellar magnitude scale, which was universally adopted by the end of the nineteenth century and which remains the standard for twentieth-century photometry.
		Pogson's thirty-year tenure at Madras witnessed two major processes in the history of science; the quickening Indian reception of Western science, and the transition from positional astronomy to astrophysics.
	www.nd.edu /~histast4/histprog/abstractIII.html (1915 words)

	Norman Robert Pogson
		Robert Luther, HMS Goldschmidt, Jean A. Borrelly, J. Palisa, Robert Pogson, EW Tempel, JC Watson, CHF Peters,...
		The Norman Robert Pogson Ratio became magnitude relation is given of assigning magnitudes.
		in the history of Robert Pogson is ever mentioned 1856 proposal for astronomy it is in connection with his Insofar as Norman a stellar magnitude scale,...
	normanbfpx.nbrewi.info (497 words)

	Norman Robert Pogson (Site not responding. Last check: 2007-10-19)
		Norman Robert Pogson (March 23, 1829 – June 23, 1891) was a British astronomer who worked in Oxford and in Chennai, India (then known as Madras).
		In 1856 he formalized the system of stellar magnitudes, by defining magnitudes logarithmically and fixing a difference of five magnitudes as corresponding to a hundred-fold difference in brightness.
		Pogson, Norman Robert Pogson, Norman Robert Pogson, Norman Robert Pogson, Norman Robert de:Norman Robert Pogson sl:Norman Robert Pogson
	norman-robert-pogson.kiwiki.homeip.net (148 words)

	Norman Robert Pogson Beschreibung in Library - Definition und Buch-Tipp.
		Dieser Artikel behandelt das Thema Norman Robert Pogson.
		Eine Übersicht der Artikel, die mit dem Thema Norman Robert Pogson verwandt sind finden Sie auf der Seite alle Artikel über Norman Robert Pogson.
		Norman Robert Pogson (* 23.03 1829 in Nottingham, † 23.06 1891) war ein englischer Astronom.
	norman_robert_pogson.know-library.net (579 words)

	Zoom Astronomy Glossary: M
		Lower numbers represent brighter objects than higher numbers; very bright star are 1st magnitude, less bright stars are 2nd magnitude, etc. The magnitude scale is logarithmic; a difference in magnitude of 5 is a 100-fold increase in brightness (the difference in each successive magnitude is a factor of about 2.512 times).
		A millibar is a unit of pressure equal to a thousandth of a bar.
		Robert Andrews Millikan (Mar. 22, 1868-Dec. 19, 1953) was an American physicist who measured the charge of the electron (in his oil-drop experiment, 1911).
	www.zoomdinosaurs.com /subjects/astronomy/glossary/indexm.shtml (4073 words)

	The 'High' Points of India's Astronomy
		Composite image of the Crab Nebula taken by the Hanle Observatory on December 25, 2001.
		Both these telescopes helped Norman Robert Pogson discover five minor planets and six variable stars.
		Pogson's assistant Chintamani Ragoonathachary discovered a variable star R.Reticuli in 1867 -- the first recorded astronomical discovery by an Indian in modern times.
	www.space.com /SpaceReportersNetworkAstronomyDiscoveries/Rao_Indianastronomy_012202.html (1000 words)

	Norman Robert Pogson \| Scienca (Site not responding. Last check: 2007-10-19)
		Pogson wurde 1851 Assistent am Radcliff-Observatorium in Oxford.
		Von 1861 an war er Direktor des Observatoriums von Madras in Indien.
		Pogson entdeckte 9 Asteroiden (siehe Liste der Asteroiden) sowie 21 veränderliche Sterne und erstellte einen umfangreichen Sternenkatalog.
	www.scienca.de /wiki/Norman_Robert_Pogson (124 words)

	(87) Sylvia, Romulus, and Remus
		Pogson, N. 1874, Astronomische Nachrichten Observations of Sylvia at Madras
		Pogson, Norman R. 1869, Astronomische Nachrichten Entdeckung eines neuen Planeten und Wiederauffindung der Sylvia durch Herrn Norman R. Pogson, Director der Sternwarte zu Madras
		Pogson, Norman Robert 1867, Astronomische Nachrichten Observations of the 87th New Planet Sylvia.
	pages.prodigy.net /wrjohnston/astro/astmoons/am-00087.html (793 words)

	87 Sylvia - Wikipedia, the free encyclopedia
		However in the article announcing the discovery of this asteroid (MNRAS, 1866), Pogson explained that he selected the name in reference to Rhea Silvia, mother of Romulus and Remus.
		As an aside, some lightcurve analyses in the mid 1990s were used to suggest that Sylvia may be a very close binary of two bodies orbiting a common center of mass with orbital radii of about 200 km − this did not turn out to be the case.
		Pogson, N. Minor Planet (87) Sylvia, Monthly Notices of the Royal Astronomical Society, Vol.
	en.wikipedia.org /wiki/87_Sylvia (841 words)

	Asteroids - Crystalinks
		After this, other astronomers joined in the search and at least one new asteroid was discovered every year after that (except the wartime year 1945).
		Notable asteroid hunters of this early era were J. Hind, Annibale de Gasparis, Robert Luther, H. Goldschmidt, Jean Chacornac, James Ferguson, Norman Robert Pogson, E. Tempel, J. Watson, C. Peters, A. Borrelly, J. Palisa, Paul Henry and Prosper Henry and Auguste Charlois.
		In 1891, however, Max Wolf pioneered the use of astrophotography to detect asteroids, which appeared as short streaks on long-exposure photographic plates.
	www.crystalinks.com /asteroids.html (2144 words)

	meril norman information -- meril norman (Site not responding. Last check: 2007-10-19)
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	www.smurnorman.info /merilnorman (777 words)

	Histórias da Astronomia 006 - Norman Robert Pogson
		Histórias da Astronomia 006 - Norman Robert Pogson
		Afora os seus trabalhos de fotometria estelar e estrelas variáveis, Pogson descobriu oito asteróides: 42.Isis (1856.Mai.23), 43.Ariadne (1857.Abr.15) e 46.Hestia (1857.Ago.16), ainda em Oxford e 67.Asia (1861.Abr.17), 80.Sappho (1864.Mai.03), 87.Sylvia (1866.Mai.16), 107.Camilla (1868.Nov.17) e 245.Vera (1885.Fev.06), em Madras.
		Pogson foi membro da Royal Astronomical Society (Inglaterra) e publicou muitos trabalhos sobre estrelas variáveis e asteróides em revistas especializadas em Astronomia.
	www.uranometrianova.pro.br /historia/hda/0002/pogson.htm (336 words)

	Norman Robert Pogson
		Von 1861 an war er des Observatoriums von Madras in Indien.
		Er die Helligkeitsskala der Sterne indem er das von Hipparcos eingeführte System der Größenklassen in ein logarithmisches Verhältnis setzte.
		Zu Ehren Pogsons wurde ein 50 großer Mondkrater benannt.
	www.uni-protokolle.de /Lexikon/N.R._Pogson.html (102 words)

	Norman Robert Pogson - Free net encyclopedia (Site not responding. Last check: 2007-10-19)
		Pogson, MNRAS 17 pp 12 1856 in which Pogson first introduced his magnitude systemTemplate:Astronomer-stub
		de:Norman Robert Pogson es:Norman Pogson ja:гѓЋгѓјгѓћгѓігѓ»гѓќг‚°г‚Ѕгѓі sl:Norman Robert Pogson zh:и«ѕж›јВ·зѕ…дјЇз‰№В·ж™®жЈ®
		This page was last modified 07:02, 4 April 2006.
	www.netipedia.com /index.php/N._R._Pogson (287 words)

	Enciclopedia :: 100cia.com (Site not responding. Last check: 2007-10-19)
		Norman Robert Pogson (Nottingham (Reino Unido), 23 de marzo de 1829 - ;?, 23 de junio de 1891).
		A los 18 aÃ±os Pogson habÃa ya calculado las Ã³rbitas de dos cometas.
		En 1856 propuso adoptar este sistema en el que cada decremento en la escala de magnitud aparente representa un descenso del brillo igual a la raÃz quinta de 100 (â 2.512), constante denominada razÃ³n de Pogson.
	www.100cia.com /enciclopedia/Norman_Pogson (232 words)

	Astro-ph for busy people (Site not responding. Last check: 2007-10-19)
		The current system of stellar magnitudes first introduced by Hipparchus was strictly defined by Norman Robert Pogson in 1856.
		It is also found that light ratios in each star catalogue nearly equal to 2.512, excluding the brightest (1st) and the dimmest (6th and dimmer) stars being unsuitable for the examination.
		It means that the visual magnitudes in old star catalogues fully agree with Pogson's logarithmic scale.
	www.camk.edu.pl /~gwar/astro-ph/2003.09.12.html (5862 words)

	OBSERVING
		He thus classified the star as a faint nova.
		But a few months later in March 1856 the star was seen again, this time by another English astronomer Norman Robert Pogson (1829-1891).
		From this moment the star was monitored more systematically and more outbursts were observed.
	home1.gte.net /res6vljt/id2.html (2836 words)

	Amazon.com: "times brighter": Key Phrase page (Site not responding. Last check: 2007-10-19)
		Star-Hopping: Your Visa to Viewing the Universe by Robert A. Garfinkle
		magnitude scale was devised, in 1856, by British astronomer Norman Robert Pogson (1829-91).
		His scale has each magnitude being 2.512 times brighter or dimmer than the magnitude next to it.
	www.amazon.com /phrase/times-brighter (573 words)

	Cambridge Conference Correspondence
		great British astronomer Norman Robert Pogson (he is better known for his
		Pogson step method used in variable star work) who discovered five
		For the last one year I have been trying with little success to set up a
	abob.libs.uga.edu /bobk/ccc/cc032702.html (9276 words)

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