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ASTRO: Pegasus Dwarf Galaxy
The Pegasus Dwarf is a nearby galaxy also known as UGC 12613 and Pegasus
DIG (Dwarf Irregular Galaxy). You'd think that being a very nearby galaxy we'd know its distance very accurately. NOT! There is much disagreement here. Some say it is a distant satellite of M31, others say it is a member of the M31 group. These would put its distance at about 3 million light years. Others say it is a neighbor of IC 1613 which would put it some 5.5 million light years away. You can read more about the distance problem at: http://seds.org/~spider/Spider/LG/peg_dw.html The obvious near edge on spiral is UGC 12613 at 900 MLY. Off the southeast (lower left) end Pegasus DIG is the spherical, near star-like galaxy, IV Zw 152 at 910 MLY. Off the opposite end is a much smaller star-like galaxy surrounded by a fairly large fuzzy halo. This is SDSS J232817.48+144509.2 at 1.8 billion light years. The field is full of galaxies, most of which are fainter than my limiting magnitude due to the snow greatly increasing my sky's brightness. NED lists well over 500 within 5 minutes of arc of this galaxy. That's about its length in my shot. So nearly every star like object you see that isn't perfectly round, and some that are, are really distant galaxies. Maybe next time I can image it without snow on the ground. 14" LX200R @ f/10, L=4x10', RGB=2x10', 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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ASTRO: Pegasus Dwarf Galaxy
Great picture Rick. I have never imaged that one, not sure if I have seen
pictures of it before. The other "big" galaxy is quite large for being 900 million lightyears away. Stefan "Rick Johnson" schrieb im Newsbeitrag er.com... The Pegasus Dwarf is a nearby galaxy also known as UGC 12613 and Pegasus DIG (Dwarf Irregular Galaxy). You'd think that being a very nearby galaxy we'd know its distance very accurately. NOT! There is much disagreement here. Some say it is a distant satellite of M31, others say it is a member of the M31 group. These would put its distance at about 3 million light years. Others say it is a neighbor of IC 1613 which would put it some 5.5 million light years away. You can read more about the distance problem at: http://seds.org/~spider/Spider/LG/peg_dw.html The obvious near edge on spiral is UGC 12613 at 900 MLY. Off the southeast (lower left) end Pegasus DIG is the spherical, near star-like galaxy, IV Zw 152 at 910 MLY. Off the opposite end is a much smaller star-like galaxy surrounded by a fairly large fuzzy halo. This is SDSS J232817.48+144509.2 at 1.8 billion light years. The field is full of galaxies, most of which are fainter than my limiting magnitude due to the snow greatly increasing my sky's brightness. NED lists well over 500 within 5 minutes of arc of this galaxy. That's about its length in my shot. So nearly every star like object you see that isn't perfectly round, and some that are, are really distant galaxies. Maybe next time I can image it without snow on the ground. 14" LX200R @ f/10, L=4x10', RGB=2x10', 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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