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VdB 141 Ghost Nebula

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Posts Made By: Roland Christen

June 6, 2012 10:08 PM Forum: Astro-Physics

First Venus transit image processed

Posted By Roland Christen
This is a stack of 10 frames from my white light video, taken at prime focus with 175 EDF refractor.

I did get another video sequence that shows a satellite going across the sun. I'll see if I can bring that one out.

Rolando

June 22, 2012 04:00 PM Forum: Astro-Physics

The deep blue sea

Posted By Roland Christen
Ya gotta see this:
http://www.avertedimagination.com/img_pages/deepbluesea.html

June 22, 2012 04:01 PM Forum: CCD Imaging and Processing/Solar System

The deep blue sea

Posted By Roland Christen
Ya gotta see this:

http://www.avertedimagination.com/img_pages/deepbluesea.html

June 28, 2012 06:41 PM Forum: CCD Imaging and Processing/Deep Sky

M8 from my observatory..

Posted By Roland Christen
..in the city, last night, overlooking a brightly lit Home Depot parking lot, during a scorching Midwest summer night, thru thin clouds that glowed like Gotterdammerung. Thank goodness for narrow band H-a filters! Unguided I might add since I could not keep a guide star going thru those clouds that continually swept thru the field.


6 x 5 minute exposure thru Baader 7nm H-a filter, 175EDF refractor working at F6 with TCC telecompressor, STL11K camera.

Rolando

June 28, 2012 06:43 PM Forum: Astro-Physics

M8 from my observatory..

Posted By Roland Christen
..in the city, overlooking a brightly lit Home Depot parking lot, during a scorching Midwest summer night, thru thin clouds that glowed like Gotterdammerung. Unguided I might add since I could not keep a guide star going thru those clouds that continually swept thru the field.

6 x 5 minute exposure thru Baader 7nm H-a filter, 175EDF refractor working at F6 with TCC telecompressor, STL11K camera.

Rolando

July 4, 2012 05:02 PM Forum: CCD Imaging and Processing/Deep Sky

dark skies at night

Posted By Roland Christen

This will air tomorrow , July 5th. Great way to learn why light pollution is such an issue

http://www.pbs.org/pov/citydark/

Rolando

July 14, 2012 10:14 PM Forum: CCD Imaging and Processing/Deep Sky

M8 Hourglass Nebula in Narrowband

Posted By Roland Christen
This image was shot with my dual setup on the new 1600 mount. I have a 10" Mak-Cass on one side and 175 EDF refractor on the other. I recently posted a wide field image taken with the 175 operating at F 6, 1050mm FL.

This image was taken with 3 narrow band filters thru the 10" at F14.6, 3708mm FL. Camera was the QSI 683. The seeing varied from 1.9 arc sec to 3.5 arc sec FWHM.

I am totally convinced that I could have recorded much higher resolution if this scope was located down in Chile in the mountains, or even in the Florida Keys, but alas, I had to make do with the object barely rising above 25 degrees, and shooting into severe light pollution right over a huge shopping center with lots of big box stores.

R = 17 x 300 sec 2x2 bin OIII
G = 38 x 300 sec 1x1 bin H-a
B = 17 x 300 sec 2x2 bin SII

Luminance layer used the H-a exposures.

Rolando

August 2, 2012 12:39 AM Forum: Astro-Physics

Veil in H-a

Posted By Roland Christen
Had some great seeing last night, although a bit hazy. Did manage to shoot a few objects. This is a 6 x 5 minute shot with the 175EDF refractor operating at F6. Unfortunately cannot post full resolution uncropped image due to 500k limit.

7nm Baader H-a filter, STL11K camera.

Rolando

August 2, 2012 12:41 AM Forum: CCD Imaging and Processing/Deep Sky

Veil in H-a

Posted By Roland Christen
Had some great seeing last night, although a bit hazy. Did manage to shoot a few objects. This is a 6 x 5 minute shot with the 175EDF refractor operating at F6. Unfortunately cannot post full resolution uncropped image due to 500k limit.

7nm Baader H-a filter, STL11K camera.

Rolando

August 6, 2012 10:13 PM Forum: CCD Imaging and Processing/Deep Sky

Veil in narrowband color

Posted By Roland Christen

I was able to get some OIII and SIII exposures last week. The composite color image has H-a mapped to red, OIII mapped to blue and SII used in the green channel. I'm not fully happy with this image, and will be working more with the data. I will need more OIII and SII data to lower the noise.

Rolando

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