ASTRO: NGC 7741

NGC 7741 is a rather low surface brightness barred spiral inside the
Great Square of Pegasus. I found its distance rather uncertain. Adam
Block put it at 30 million light years on his AOP pages. NED shows
distance estimates from 40 to nearly 60 million light years with a mean
of a bit under 50 million light years. In any case its red shift
distance of only 19 million light years seems unreliable.

I lost this one on the hard drive. Probably because the color data was
so poor in green and especially blue I didn't think it worth processing.
Somehow I moved its data to an already processed object's file and
forgot about it. This was taken back in December 2008. When I saw an
image of this posted on a forum it looked familiar and did a search of
the hard drive turning it up. I had to struggle with the poor color
data and probably should have retaken it. Still I think it turned out
better than it should have looking at the raw data.

There is massive star formation going on in the bar making it rather
blue in color from all the super hot stars recently formed there. My
poor color data turned it more white than blue as it should be. There
are a couple HII regions just north and south of the bar. They appear
more orange than pink. I don't know if this is due to dust or my color
data problem.

This field isn't covered by the SDSS. NED has little on the area as
well. It does show that the galaxy cluster ZwCl 2341.1+2544 accounts
for most of the field galaxies as it is centered a sort distance
southwest of NGC 7741 and is 30 minutes across which is about the width
of my field. I found no distance to it. NED lists it as having 101
members.

Adam Block using the new 32" scope atop Mt. Lemon at the University of
Arizona's SkyCenter took this image of the galaxy a short while ago.
http://www.caelumobservatory.com/gallery/n7741.shtml
Too bad there aren't any laminar air flow mountains here in Minnesota.

14" LX200R @ f/10, L=4x10' R=2x10'x3 GB=1x10'x3, 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".

Rick,

that's a good one, in spite of the colour exposures. One of my favourite
autumn galaxies.

Stefan

"Rick Johnson" schrieb im Newsbeitrag
er.com...
NGC 7741 is a rather low surface brightness barred spiral inside the
Great Square of Pegasus. I found its distance rather uncertain. Adam
Block put it at 30 million light years on his AOP pages. NED shows
distance estimates from 40 to nearly 60 million light years with a mean
of a bit under 50 million light years. In any case its red shift
distance of only 19 million light years seems unreliable.

I lost this one on the hard drive. Probably because the color data was
so poor in green and especially blue I didn't think it worth processing.
Somehow I moved its data to an already processed object's file and
forgot about it. This was taken back in December 2008. When I saw an
image of this posted on a forum it looked familiar and did a search of
the hard drive turning it up. I had to struggle with the poor color
data and probably should have retaken it. Still I think it turned out
better than it should have looking at the raw data.

There is massive star formation going on in the bar making it rather
blue in color from all the super hot stars recently formed there. My
poor color data turned it more white than blue as it should be. There
are a couple HII regions just north and south of the bar. They appear
more orange than pink. I don't know if this is due to dust or my color
data problem.

This field isn't covered by the SDSS. NED has little on the area as
well. It does show that the galaxy cluster ZwCl 2341.1+2544 accounts
for most of the field galaxies as it is centered a sort distance
southwest of NGC 7741 and is 30 minutes across which is about the width
of my field. I found no distance to it. NED lists it as having 101
members.

Adam Block using the new 32" scope atop Mt. Lemon at the University of
Arizona's SkyCenter took this image of the galaxy a short while ago.
http://www.caelumobservatory.com/gallery/n7741.shtml
Too bad there aren't any laminar air flow mountains here in Minnesota.

14" LX200R @ f/10, L=4x10' R=2x10'x3 GB=1x10'x3, 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".