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Sculptor Galaxy (NGC 253)

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Posts Made By: Dennis Persyk

April 12, 2004 07:04 PM Forum: CCD Imaging and Processing/Solar System

NGC 1893

Posted By Dennis Persyk
Imaged with a 4-inch refractor at f/5.4 and H-alpha filter.

http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL


April 16, 2004 10:49 PM Forum: CCD Imaging and Processing/Solar System

Image Processing Lesson

Posted By Dennis Persyk
Graphic artist Ray Fox on the views_thru_the-eyepiece group suggested that my original H-a image of NGC 1893 was clipped and that I should emphasize the midtone ranges. I followed Ray’s advice and the result was impressive. I had thrown away a lot of signal in the original processing! Thanks Ray!

Side-by-side comparisons with histograms at
http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL

April 25, 2004 05:33 PM Forum: CCD Imaging and Processing/Solar System

NGC 3190 Group

Posted By Dennis Persyk
NGC 3190 in Leo is one of a group of galaxies contained in a 40 arc minute FOV. I imaged it for 71 minutes with my E160 6-inch astrograph and MX716 CCD camera. This was the first light for the E160. Please take a look.

http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL


April 30, 2004 09:22 PM Forum: CCD Imaging and Processing/Solar System

M67 Open Cluster

Posted By Dennis Persyk
Here I am with a new scope, no Hydrogen alpha filter that fits it, and a full moon. What a dilemma! I settled on M67 as a suitable target, assuming that the moonlight couldn’t ruin an open cluster too much. I average combined 21 one-minute exposures in the final image. One minute was as long as I could expose without the moonlight saturating the background with the fast f/3.3 E160 astrograph. Please take a look.

http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL


May 4, 2004 04:25 PM Forum: CCD Imaging and Processing/Solar System

C2004 F4 Bradfield

Posted By Dennis Persyk
I imaged F4 Bradfield under difficult conditions early morning on the 3rd of May. By the time the comet cleared the trees in my yard, its elevation was 15.5 degrees and it was noticeably light out, being 21 minutes past twilight. The moon was full. I did manage to capture a 45 arc minute long tail, limited only by the FOV of my E160 scope and MX716 camera.

Positive image, negative image and isophotes at
http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL


May 7, 2004 04:58 PM Forum: CCD Imaging and Processing/Solar System

F4 Bradfield Antitail

Posted By Dennis Persyk
My F4 Bradfield image of 3 May, 2004, shows a 1.5 arc minute antitail. Juan Lucruz http://www.geocities.com/juan_lacruz/ was the first to point it out in my original image posting. I have since reprocessed the image to better illustrate the antitail.

In almost all cases, a comet's tail points away from the Sun, blown out by the solar wind. However, in rare cases, dust around the comet's orbit leads to a Sun-pointing 'antitail'. This occurs when the Earth happens to pass through the plane of the comet's orbit.

Images at
http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL





May 13, 2004 05:23 PM Forum: CCD Imaging and Processing/Solar System

Comet Q4 Images

Posted By Dennis Persyk
I imaged C2001 Q4 NEAT at both 530 mm and 50 mm focal lengths at 0312 UT on 12 May, 2004. In addition to the comet images, I have included simulated views through the C-11 scope and 7x50 binoculars. The imaging setup is also shown. Please take a look.

http://home.att.net/~dpersyk/new.htm

I welcome comments from everyone. Thanks for looking.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL





May 20, 2004 06:37 PM Forum: CCD Imaging and Processing/Solar System

Q4 as Seen by CCD and Eyeball

Posted By Dennis Persyk
I created a C2001 Q4 NEAT mosaic on 17 May at 0215 UT. The mosaic worked better for me than my previous effort using a 135 mm lens to capture more of the tail

I have included simulated views through the C-11 scope and 7x50 binoculars. I was surprised that the view was much better through the binoculars at 7X than though the 11 inch SCT at 25X.

http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL

May 29, 2004 12:38 AM Forum: CCD Imaging and Processing/Solar System

Abell Galaxy Cluster 2151

Posted By Dennis Persyk
Abell 2151 is a galaxy cluster centered on NGC 6047 in Hercules. I imaged oodles and oodles of galaxies within a 42 arc minute FOV with my Takahashi E160 astrograph and MX716 camera. I’ve included a planetarium program overlay to help sort out some of the little galaxies I captured down to magnitude 18 from my VLM 4.3 skies.

Please take a look at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL





June 7, 2004 10:07 PM Forum: CCD Imaging and Processing/Solar System

C/2003 K4 LINEAR Images and Movie

Posted By Dennis Persyk
I imaged C/2003 K4 LINEAR on 7 June at 0534 UT. C-11 scope at f/5 and MX716 CCD camera. A small movie is included on my New Image Page linked below to illustrate the relative motion of the comet.

The comet is presently magnitude 8.1 in Lyra and can be seen with most telescopes.

Images and movie at
http://home.att.net/~dpersyk/new.htm

Thank you for visiting my site.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL

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