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ASTRO: Open cluster IC 166
IC 166 is an open cluster in Cassiopeia. It is about 10,750 light years
from us by one paper I found. The WEBDA puts it at 13,000 light-years. Pinning down an open cluster's distance is still beyond the science in most cases. It's age is estimated to be about 1.32 +/- 0.43 billion years. Wide field images show it is seen at the edge of a weak dark nebula so stars are likely reddened. It's age plus the dust likely account for the rather red color of most of the stars in the cluster. 14" LX200R @ f/10, L=4x10' RGB=2x10x3, 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". |
#2
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ASTRO: Open cluster IC 166
Rick,
a very nice cluster, you did a great job of maintaining the star colours. Stefan "Rick Johnson" schrieb im Newsbeitrag .com... IC 166 is an open cluster in Cassiopeia. It is about 10,750 light years from us by one paper I found. The WEBDA puts it at 13,000 light-years. Pinning down an open cluster's distance is still beyond the science in most cases. It's age is estimated to be about 1.32 +/- 0.43 billion years. Wide field images show it is seen at the edge of a weak dark nebula so stars are likely reddened. It's age plus the dust likely account for the rather red color of most of the stars in the cluster. 14" LX200R @ f/10, L=4x10' RGB=2x10x3, 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". |
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