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ASTRO: M88
Looking back at last year's data trying to find moon damaged shots I'd
not processed I found a directory labeled MISC. I was surprised to find several nights of imaging that somehow had their files put in this directory rather in the main directory for that month. One of those was an image of M88. Seeing wasn't very good but it explains why it was checked off my M object list yet I couldn't find it so had put it back on the list. The small dwarf galaxy down and right (southwest) of M88 is VCC 1400. While a member of the Virgo cluster it appears not to be associated with M88 as their red shifts are very different. M88 is actually moving away from us at a high speed so while it is probably about 60 million light years from its red shift indicates a distance of 118 million light years. VCC 1400 has a more normal redshift indicating a distance of 35 million light years. Rather normal for Virgo cluster objects since we are heading somewhat toward the cluster skewing the redshift to appear closer than it really is. Of more interest is the small red galaxy down and right of VCC 1400. It's on a line from VCC 1400 through a faint galaxy and ending at a bright blue star. Between the faint galaxy and blue star is a small, very red, galaxy. It's red color got my eye. Normally I can't find these guys in any catalog but this area has been included in the Sloan Deep Sky Survey and its red shift measured. It is SDSS J123146.84+141559.4. Per NED the redshift shows a light travel distance of about 3.26 billion light years. That makes it the most distant galaxy I've imaged that actually shows a hint of detail. I may have imaged others even farther out but I've not found them on any survey to know their distance. When I started imaging in the early 60's I never dreamed I could image a galaxy at such a distance. 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: M88
Beautiful image Rick. You got a lot of detail in M88.
Stefan "Rick Johnson" schrieb im Newsbeitrag ... Looking back at last year's data trying to find moon damaged shots I'd not processed I found a directory labeled MISC. I was surprised to find several nights of imaging that somehow had their files put in this directory rather in the main directory for that month. One of those was an image of M88. Seeing wasn't very good but it explains why it was checked off my M object list yet I couldn't find it so had put it back on the list. The small dwarf galaxy down and right (southwest) of M88 is VCC 1400. While a member of the Virgo cluster it appears not to be associated with M88 as their red shifts are very different. M88 is actually moving away from us at a high speed so while it is probably about 60 million light years from its red shift indicates a distance of 118 million light years. VCC 1400 has a more normal redshift indicating a distance of 35 million light years. Rather normal for Virgo cluster objects since we are heading somewhat toward the cluster skewing the redshift to appear closer than it really is. Of more interest is the small red galaxy down and right of VCC 1400. It's on a line from VCC 1400 through a faint galaxy and ending at a bright blue star. Between the faint galaxy and blue star is a small, very red, galaxy. It's red color got my eye. Normally I can't find these guys in any catalog but this area has been included in the Sloan Deep Sky Survey and its red shift measured. It is SDSS J123146.84+141559.4. Per NED the redshift shows a light travel distance of about 3.26 billion light years. That makes it the most distant galaxy I've imaged that actually shows a hint of detail. I may have imaged others even farther out but I've not found them on any survey to know their distance. When I started imaging in the early 60's I never dreamed I could image a galaxy at such a distance. 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: M88
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