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ASTRO: Abell 81 the northern most Abell planetary nebula
IC 1454/Abell 81 is the northernmost of the Abell planetary nebula
located in Cepheus only 9.56 degrees from the pole. There's a wide range of distance values for this one. I'll go with the one at http://www.astronomy-mall.com/Advent...e/abellcat.htm which puts it a bit over 17,000 light-years away. It is about 38" of arc across. Catalogs list it at 14 and 15th magnitude with an 18.8 magnitude central star. Other than this I can't find much on it. Even less on the field. Only a few of the galaxies are in NED, none have much data let alone redshift data. Thus I didn't prepare an annotated image. This lack of data is common for far northern objects. 14" LX 200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
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ASTRO: Abell 81 the northern most Abell planetary nebula
I grabbed the wrong link. The one for distance is:
http://cdsads.u-strasbg.fr/cgi-bin/n...osetcook ie=1 The included one is a listing of all Abell "planetary" nebula. Quotes because a few turned out to be something else. Rick __________ On 2/28/2014 12:04 AM, Rick Johnson wrote: IC 1454/Abell 81 is the northernmost of the Abell planetary nebula located in Cepheus only 9.56 degrees from the pole. There's a wide range of distance values for this one. I'll go with the one at http://www.astronomy-mall.com/Advent...e/abellcat.htm which puts it a bit over 17,000 light-years away. It is about 38" of arc across. Catalogs list it at 14 and 15th magnitude with an 18.8 magnitude central star. Other than this I can't find much on it. Even less on the field. Only a few of the galaxies are in NED, none have much data let alone redshift data. Thus I didn't prepare an annotated image. This lack of data is common for far northern objects. 14" LX 200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
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ASTRO: Abell 81 the northern most Abell planetary nebula
Rick,
that's a neat little ring with some nice structure. It is on my list, maybe next summer... Stefan "Rick Johnson" schrieb im Newsbeitrag ... IC 1454/Abell 81 is the northernmost of the Abell planetary nebula located in Cepheus only 9.56 degrees from the pole. There's a wide range of distance values for this one. I'll go with the one at http://www.astronomy-mall.com/Advent...e/abellcat.htm which puts it a bit over 17,000 light-years away. It is about 38" of arc across. Catalogs list it at 14 and 15th magnitude with an 18.8 magnitude central star. Other than this I can't find much on it. Even less on the field. Only a few of the galaxies are in NED, none have much data let alone redshift data. Thus I didn't prepare an annotated image. This lack of data is common for far northern objects. 14" LX 200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
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