siqingtan 2008-8-19 15:02
希腊爱好者拍的月食
Maximum Partial Totality and Umbral Shadow
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The year's fourth eclipse and second lunar eclipse went out with a bang, for
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Luna put on?uka zL`0I
an impressive display during the course of approximately three hours involving W$tp5X+O*S|v
changes inoQ:K8r] L#P
phase, intensity and colouration. It is most unfortunate that a good portion of
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Europe was overcast with heavy clouds or rains.
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In spite of the fact that the depth of the partial eclipse was 81%, a hint of`dQ(Kx8GL2F*g
red was visible in#QYGV2S.[
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the eclipsed disk well before maximum totality and when the disk was only 50%C!p1U!X[R\P!il
within thehd
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umbral shadow. At maximum, the eclipsed disk was quite dark with only a trace ofhe+?"@.nEp-l]
light
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and, as indicated by the first link below, a long exposure (3.2 seconds at ISO
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200) was
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required.
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For my two initial results (with more on the way), I kindly direct you to:? W&n;p;u
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(1) [url=http://www.perseus.gr/Astro-Eclipses-2008-08-16.htm][color=#9136ad]http://www.perseus.gr/Astro-Eclipses-2008-08-16.htm[/color][/url]{Q}"T
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(2) [url=http://www.perseus.gr/Astro-Eclipses-2008-08-16b.htm][color=#9136ad]http://www.perseus.gr/Astro-Eclipses-2008-08-16b.htm[/color][/url]
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The first result (and link above) is the partial totality at maximum and whichY'u,`IF#W
required aElio^4S+r$Yt
3.2" exposure. The second result (and link above) is the impressive umbral
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shadow which
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often is overlooked when presenting lunar eclipse images and which illustrates
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the umbral:_;I`8^;a
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cone in action.Bx Cc1P]a5@Pq
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It is unfortunate that we must wait nearly six months for the next eclipse and'M2QC,WG$~;J2f
whose path
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of annularity is in Indonesia.V
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Clear skies and best wishes from Greece!+Ea:S!q|E#}.g
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[[i] 本帖最后由 siqingtan 于 2008-8-19 15:07 编辑 [/i]]
ggg911110 2008-8-19 19:19
好大的影子啊!bbbb24
gawinzeng 2008-8-26 06:48
第二张强,很直观.