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	Rating a Lunar Eclipse - The Danjon Scale
		Early in the twentieth century, the French astronomer André Louis Danjon devised a clever five-point scale for rating the darkness of a total lunar eclipse.
		Danjon's scale worked so well that it has since gone on to become the standard by which all total lunar eclipses are judged.
		Below is the Danjon scale for rating lunar eclipses.
	starryskies.com /The_sky/events/lunar-2003/eclipse4.html (529 words)

	André Danjon - Wikipedia, the free encyclopedia
		Danjon devised a method to measure "Earthshine" on the Moon using a telescope in which a prism split the Moon's image into two identical side-by-side images.
		By adjusting a diaphragm to dim one of the images until the sunlit portion had the same apparent brightness as the earthlit portion on the unadjusted image, he could quantify the diaphragm adjustment, and thus had a real measurement for the brightness of Earthshine.
		He recorded the measurements using his method (now known as the Danjon Scale, on which zero equates to a barely visible Moon) from 1925 until the 1950s.
	www.wikipedia.org /wiki/Andre_Louis_Danjon (152 words)

	Danjon scale -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-20)
		The Danjon Scale of (The earth interrupts light shining on the moon) lunar eclipse brightness is a five-point scale useful for measuring the appearance and luminosity of the (Any natural satellite of a planet) Moon during a lunar eclipse.
		It was proposed by (Click link for more info and facts about André-Louis Danjon) André-Louis Danjon when he was measuring the (Click link for more info and facts about Earthshine) Earthshine on the (Any natural satellite of a planet) Moon.
		The scale is defined as follows (from (An independent agency of the United States government responsible for aviation and spaceflight) NASA):
	www.absoluteastronomy.com /encyclopedia/d/da/danjon_scale.htm (319 words)

	Danjon (crater) - Encyclopedia Glossary Meaning Explanation Danjon (crater) (Site not responding. Last check: 2007-10-20)
		Danjon is a lunar crater on the far side of the Moon.
		To the east-northeast of Danjon is Perepelkin crater, and due south lies the Fermi walled plain.
		The northeastern rim of Danjon is overlaid by the smaller D'Arsonval crater.
	www.encyclopedia-glossary.com /en/Danjon-crater.html (196 words)

	danjon scale
		The Danjon scale should be used to estimate the appearance of a total
		Although Danjon devised the scale to fit every lunar eclipse, it is rare
		Danjon) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
	members.aol.com /kcstarguy/blacksun/danjonscale.htm (426 words)

	Danjon Scale (Site not responding. Last check: 2007-10-20)
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	www.serebella.com /encyclopedia/article-Danjon_Scale.html (523 words)

	Danjon scale - Wikipedia, the free encyclopedia
		In addition, different parts of the Moon may have different L values, depending on their distance from the centre of the Earth's umbra.
		Volcanic eruptions are one of the most significant - eruptions which spew significant amounts of volcanic ash into the air are generally followed by several years of dark, deep red eclipses.
		The effect of the eruption of Mount Pinatubo on subsequent lunar eclipses was very noticeable, with the eclipse of 9 December 1992 rated 0 on the Danjon Scale by many observers.
	en.wikipedia.org /wiki/Danjon_Scale (341 words)

	Danjon Scale (Site not responding. Last check: 2007-10-20)
		The Danjon Scale of lunar eclipse brightness is afive-point scale useful for measuring the appearance and luminosity of the Moon during alunar eclipse.
		It was proposed by André-Louis Danjon when hewas measuring the Earthshine on the Moon.
		For example, frequent, large volcanic eruptions that spew significant amounts of volcanicash into the air are followed by several years of dark, deep red eclipses.
	www.therfcc.org /danjon-scale-32490.html (230 words)

	Danjon scale - Term Explanation on IndexSuche.Com (Site not responding. Last check: 2007-10-20)
		of lunar_eclipse brightness is a five-point scale useful for measuring the appearance and luminosity of the Moon during a lunar eclipse.
		For example, frequent, large volcanic eruptions that spew significant amounts of volcanic_ash into the air are followed by several years of dark, deep red eclipses.
		The scale is defined as follows (from NASA): L = 0 Very dark eclipse.
	www.indexsuche.com /Danjon_scale.html (260 words)

	[No title]
		Observers of eclipses use a scale of brightness from 0 to 4 suggested by the French astronomer Danjon.
		On this scale, the very darkest eclipses are rated as 0 and the very brightest, when the Moon hardly seems to dim, as 4, although both extremes are very rare indeed.
		The umbra was a gorgeous orange colour, with the edge of the disk of the Moon, near the border of the shadow, strongly yellow.
	www.iac.es /galeria/mrk/eclipse.html (599 words)

	Danjon scale (Site not responding. Last check: 2007-10-20)
		It was by André-Louis Danjon when he was measuring the Earthshine on the Moon.
		I selected these Tanita Scales mainly because they have great looks firstly - my wife is a stricler for looks in consumer products and I cant untidy up the bathroom that she has decorated, with an ugly pair of scales, so had to go with the looks there.Sec...
		Although, the Weight Watchers ww42 scale may look nice on your bathroom floor, its measurements are terribly inconsistant.After zeroing the scale and paying close attention to my foot placement, I can get off the scale and back on the same way with almost...
	www.freeglossary.com /Danjon_scale (595 words)

	Rating a Lunar Eclipse - The Danjon Scale
		Danjon's scale worked so well that it has since gone on to become the standard by which all total lunar eclipses are judged.
		Below is the Danjon scale for rating lunar eclipses.
		You can rate the lunar eclipse on the Danjon scale by using binoculars, a small telescope or just your eyes.
	www.starryskies.com /The_sky/events/lunar-2003/eclipse4.html (529 words)

	[No title]
		Raffaello Lena states "Bright eclipse from Rome, L= 4 Danjon scale; the umbral shadow had a bright rim with a bluish coloration at E- SE and orange coloration at
		Danjon proposed a useful five point scale for evaluating the visual appearance and brightness of the Moon during total lunar eclipses.
		Several observers in Italy recorded a bright eclipse at L=3 and L=4 Danjon scale.
	utenti.lycos.it /gibbidomine/eclissi2003.htm (784 words)

	Slendro bei eLexi - das Onlinelexikon (Site not responding. Last check: 2007-10-20)
		Slendro is one of the two scales of gamelan music.
		It is easier for the western ear to understand than pelog, the other scale, because it is basically just five near equally spaced tones to the octave.
		Therefore it has narrow fourths, in contrast to the wide fourths of the pelog scale.
	www.elexi.de /en/s/sl/slendro.html (291 words)

	Virtual Science Center
		If there have been major volcanic eruptions, widespread sandstorms, major forest fires or the maximum of a major meteor shower (which may trigger increased cloudiness and rainfall) in the months preceding an eclipse, the moon may be almost invisible during totality, as with eclipses in 1963 and 1964.
		A five–point subjective scale for evaluating the moon’s luminosity at mid-totality, proposed by French astronomer André–Louis Danjon (1890–1967), has provided amateurs with an invaluable tool for directly comparing modern lunar eclipses and evaluating written descriptions of historical ones (see Table 15–1).
		Make your Danjon luminosity estimates with the unaided eye or with low–power binoculars; if you are torn between two of the scale’s descriptive criteria, by all means interpolate decimal values.
	www.chabotspace.org /vsc/planetarium/eclipses/observeeclipses/chapter15.asp (1731 words)

	Diffraction Effects (Site not responding. Last check: 2007-10-20)
		The atmospheric seeing may be characterised using the Danjon scale.
		The image above illustrates this scale for the case of a single star.
		It also uses Roman numerals like the Danjon scale, but in the reverse direction so that I is the best seeing and V the worst (just to be confusing).
	www.ulo.ucl.ac.uk /~diploma/diffraction_effects.html (494 words)

	(meteorobs) =?UTF-8?Q?rate=20the=20eclipse=20with=20the=20danjon?=
		The Danjon scale, reproduced in Table 4.1, has since gone on to become the standard by which all total eclipses are judged.
		Â The Danjon scale should be used to estimate the appearance of a total eclipse only with the naked eye.
		Â Although Danjon devised the scale to fit every lunar eclipse, it is rare for an eclipse to match one of his descriptions exactly.
	www.meteorobs.org /maillist/msg17458.html (637 words)

	oct242004 (Site not responding. Last check: 2007-10-20)
		Espenak suggests recording estimates of the moon's brightness every 10 minutes during totality using the Danjon Scale.
		The scale starts at L (luminosity) equal to 0, which is a very dark eclipse; the moon is almost invisible, especially at mid-totality.
		L=1 is a dark eclipse with gray or brownish colors; details on the moon are hard to distinguish.
	www.cc.ysu.edu /physics-astro/starlady/oct242004.html (701 words)

	NASA - Eclipses During 2007
		It is not possible to predict the exact brightness distribution in the umbra, so observers are encouraged to estimate the Danjon value at different times during totality (see Danjon Scale of Lunar Eclipse Brightness).
		The French astronomer André-Louis Danjon proposed a useful five-point scale for evaluating the visual appearance and brightness of the Moon during total lunar eclipses.
		For lunar eclipses, the diameter of the umbral and penumbral shadows were calculated using Danjon's rule of enlarging Earth's radius by 1/85 to compensate for the opacity of the terrestrial atmosphere; corrections for the effects of oblateness have also been included.
	sunearth.gsfc.nasa.gov /eclipse/OH/OH2007.html (3888 words)

	NRAO - News - Full Lunar Eclipse Visible throughout Eastern United States May 15
		In fact, there is a scale that astronomers use to "rank" the brightness and color of the Moon during a Lunar Eclipse, it's called the Danjon Scale.
		The Moon would be about the size of your fist -- though your fist would have to be about 20 feet from your head for the scale to be right.
		On this scale, the Sun would be more than a mile away.
	www.nrao.edu /news/lunar.shtml (693 words)

	Danjon Scale (Site not responding. Last check: 2007-10-20)
		The darkest eclipses occur when clouds of volcanic ash high in the atmosphere block most of this light.
		The following scale, intended for visual observers, was designed by the French astronomer André Louis Danjon (1890-1967).
		Source: Danjon Scale of Lunar Eclipse Brightness, posted by the U.S. NASA Goddard Spaceflight Center.
	www.unc.edu /~rowlett/units/scales/danjon.html (200 words)

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	www.teddybears-n-dolls.com /food-groceries/1-scale/f20j47182.html (453 words)

	Observing the Sky » Lunar Eclipse Expectations (Site not responding. Last check: 2007-10-20)
		Through a telescope, you won’t see the long shadows cast by crater rims and mountains, as the Moon is still full, though just appearing to go through all of its phases of illumination.
		The darkness of a lunar eclipse is gauged by the Danjon Scale: a 0 being a very dark, nearly invisible Moon at mid-eclipse, and a 4 being a bright eclipse copper-red & orange-yellow from center to outer rim then.
		The last lunar eclipse I saw was in May, 2003, and I estimated the Danjon number at a 2.2, a dark rusty brown interior with a deep-red exterior (and slightly lighter gray on the southern highlands).
	www.observingthesky.org /index.php?p=745 (294 words)

	Sky-Watchers Await Total Lunar Eclipse on Thursday (Site not responding. Last check: 2007-10-20)
		The estimated magnitude of the reduced moon can then be adjusted by a factor depending on the magnification of the binoculars, which yields the actual magnitude of the moon.
		Another way to estimate the brightness of a lunar eclipse is to use the so-called Danjon scale, which was created by the late French astronomer André-Louis Danjon.
		The four-point scale for evaluating the moon's luminosity during totality ranges from 0, a very dark eclipse that renders the moon nearly invisible, to 4, a very bright copper-red or orange.
	news.nationalgeographic.com /news/2003/05/0512_030512_lunareclipse_2.html (954 words)

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	Learn more about André Danjon in the online encyclopedia. (Site not responding. Last check: 2007-10-20)
		Learn more about André Danjon in the online encyclopedia.
		Enter a phrase or search word in the box below.
		Hint: Play with putting spaces before and after your words to see the different results you get.
	www.onlineencyclopedia.org /a/an/andre_danjon.html (213 words)

	Cats in Space: Library (Site not responding. Last check: 2007-10-20)
		There have been partial lunar eclipses-- when the moon only partly enters the Earth's shadow, between 1996 and 2000.
		This was one of the brightest total eclipses possible ranking at 3 on the Danjon scale.
		The Danjon scale ranges from 0-4 with 4 being the brightest.
	catsinspace.com /library/lib36.shtml (484 words)

	Times Community Newspapers - Local News - 11/04/2003 - Moon stars in Saturday spectacle
		Astronomy experts say this is the last total lunar eclipse of Saros 126, a measurement unit that includes 13 total eclipses in the last 234 years.
		NASA encourages you to rate the eclipse on the Danjon scale, developed by French astronomer Andre-Louis Danjon to measure the color and brightness of lunar eclipses from L-0, the dimmest, to L-4, the brightest and most vibrant.
		Or skip all the science, take a blanket and a jug of cider, and head out onto a deserted country road to bask in the moon glow.
	www.zwire.com /site/tab1.cfm?newsid=10462624&BRD=2553&PAG=461&dept_id=506035&rfi=6 (304 words)

	The Astronomical Society of Harrisburg
		I was surprised by how dark the fully eclipsed moon seemed to me, as predictions called for a fairly bright eclipse.
		(An informal Internet poll that I conducted after the eclipse resulted in a rather wide range of Danjon Scale values, from as dark as 1.5 to as bright as 3.8.) It was fairly easy to see M44 with the naked eye during totality.
		To the unaided eye the moon appeared to have a somewhat copper-like hue.
	www.astrohbg.org /mitsky/y2k_lunar_eclipse.php (334 words)

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