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ASTRO: Sh2-187
SH2-187
Cassiopeia Penryn, California September 2010 FS-128 (ag, ST-4) ST-2000XM LRGB 10 minute subs Sh2-187 is a complex area of gas, molecular clouds and dust. Multifrequeny studies indicate the HII region is fragmented and still partially encased in the parental cloud out of which it was born some 200,000 years ago. Only 3 percent of the HII region is optically visible and is ionized by a BO class star with a magnitude of 0.5. The molecular cloud covers approximately 1 degree. Numerous IR point sources are embedded within the complex, one source is most likely an H2O maser and the remainder are either proto stars or stars. (Joncas, et.al. 1992) I keep bumping against sky background on these faint objects. |
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ASTRO: Sh2-187
On 9/5/2010 12:38 PM, glen youman wrote:
SH2-187 Cassiopeia Penryn, California September 2010 FS-128 (ag, ST-4) ST-2000XM LRGB 10 minute subs Sh2-187 is a complex area of gas, molecular clouds and dust. Multifrequeny studies indicate the HII region is fragmented and still partially encased in the parental cloud out of which it was born some 200,000 years ago. Only 3 percent of the HII region is optically visible and is ionized by a BO class star with a magnitude of 0.5. The molecular cloud covers approximately 1 degree. Numerous IR point sources are embedded within the complex, one source is most likely an H2O maser and the remainder are either proto stars or stars. (Joncas, et.al. 1992) I keep bumping against sky background on these faint objects. That's one I've been meaning to revisit since I replaced my filters with ones with far less reflections. I was killed by them, especially in the blue. Now all I need is clear skies. They continue to be in very short supply. To me this one looks a bit like a spider 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". |
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