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#1
September 30th 08, 05:47 PM
posted to alt.binaries.pictures.astro
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Astro: A Cepheus Planetary NGC 7139
Milky Way wasn't quite as dense in Cepheus as it is was in Cygnus for
NGC6894. Still it makes for a nice setting. Note that most of the red ring is due to NII not HII though there is some HII. The NII line is so close to HII a 3nm filter is needed to separate the them. This however is just a LRGB image. 14" LX200R @ f/10, L=4x10' binned 2x2, RGB=1x10' binned 3x3 (clouds prevented a second set of color frames and this seemed sufficient so never went back for more), STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". Rick 
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#2
September 30th 08, 09:50 PM
posted to alt.binaries.pictures.astro
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Astro: A Cepheus Planetary NGC 7139
Beautiful image Rick. I thought I had not imaged this one, but found an
image from 2001 (attached). My MX512 camera sometimes produced strange "shadows" behind brighter stars... Stefan "Rick Johnson" schrieb im Newsbeitrag ster.com... Milky Way wasn't quite as dense in Cepheus as it is was in Cygnus for NGC6894. Still it makes for a nice setting. Note that most of the red ring is due to NII not HII though there is some HII. The NII line is so close to HII a 3nm filter is needed to separate the them. This however is just a LRGB image. 14" LX200R @ f/10, L=4x10' binned 2x2, RGB=1x10' binned 3x3 (clouds prevented a second set of color frames and this seemed sufficient so never went back for more), STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". Rick
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#3
October 1st 08, 11:01 PM
posted to alt.binaries.pictures.astro
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Astro: A Cepheus Planetary NGC 7139
nice shot Rick
Rick Johnson wrote: Milky Way wasn't quite as dense in Cepheus as it is was in Cygnus for NGC6894. Still it makes for a nice setting. Note that most of the red ring is due to NII not HII though there is some HII. The NII line is so close to HII a 3nm filter is needed to separate the them. This however is just a LRGB image. 14" LX200R @ f/10, L=4x10' binned 2x2, RGB=1x10' binned 3x3 (clouds prevented a second set of color frames and this seemed sufficient so never went back for more), STL-11000XM, Paramount ME Rick ------------------------------------------------------------------------ -- John N. Gretchen III http://www.tisd.net/~jng3
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