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ASTRO: NGC7354



 
 
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  #1  
Old October 15th 08, 06:54 PM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
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Posts: 3,085
Default ASTRO: NGC7354

Small planetaries have been a problem for me. I just don't have the
seeing to show the fine detail others can image so I get a blob of
light. NGC 7354 has been a failure of mine due to seeing. But a while
ago seeing showed signs of calming. I took 2 hours of luminosity data
using 2 minute exposures at 0.5". Only 9 of them were usable. Seeing
never held for more than 2 minutes hence the short exposure time. I
really need 20 minute frames as this scale to keep the noise down. By
this time seeing was getting poor but I grabbed a couple minutes of 1.0"
color data for each color. I planned on trying again but the weather
never cooperated and it has moved into my "Polaris tree" for the rest of
the season. I was surprised to find something could be salvaged from
this very limited data. Color is weak but will have to do for this year.

14" LX200R @ f/10, L=9x2' RGB=2x2', 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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  #2  
Old October 19th 08, 12:07 PM posted to alt.binaries.pictures.astro
Stefan Lilge
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Posts: 2,269
Default ASTRO: NGC7354

Great shot Rick. This nebula looks a lot like NGC 6772 and 6804. It looks
like I haven't imaged this one.

Stefan

"Rick Johnson" schrieb im Newsbeitrag
ster.com...
Small planetaries have been a problem for me. I just don't have the
seeing to show the fine detail others can image so I get a blob of
light. NGC 7354 has been a failure of mine due to seeing. But a while
ago seeing showed signs of calming. I took 2 hours of luminosity data
using 2 minute exposures at 0.5". Only 9 of them were usable. Seeing
never held for more than 2 minutes hence the short exposure time. I
really need 20 minute frames as this scale to keep the noise down. By
this time seeing was getting poor but I grabbed a couple minutes of 1.0"
color data for each color. I planned on trying again but the weather
never cooperated and it has moved into my "Polaris tree" for the rest of
the season. I was surprised to find something could be salvaged from
this very limited data. Color is weak but will have to do for this year.

14" LX200R @ f/10, L=9x2' RGB=2x2', 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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