Scroll down or click here for the large, narrowband imageScroll down or click here for the large, narrowband image
Combination of 29x4 minute exposures (116 minutes total exposure). Takahashi TOA 130 (a 5" APO refractor) and Canon EOS D20a. My current image processing workflow is here. The images from this session feature 29 light frames median combined, along with 9 dark frames. On the darks, I did both a median combine and an average combine, and then averaged those together. Temperature ranged from ~51 degrees F at the start of imaging to 42 degrees when I was packing up and doing my last darks. The rest of the images from this night...
Feb 10, 2006: I'm pleased to report that the image above was the runner-up out of 15 images in the digital_astro Yahoo Group's competition for the 2006 January Challenge! (You may have to be a member of the group to access the last link)
The Horsehead Nebula Picture above represents 9 hours of total exposure grabbed over several clear evenings during Jan 2009 from my increasingly bright suburban skies. That much light pollution normally causes a lot of problems for asto-imaging, but with filters I can fight back. It's monochrome (black and white) because I used a hydrogen alpha (H-alpha) filter that only allowed in deep-red light to pass through.
The streamers revealed in this picture are caused by gas leaving the nebula and magnetic field interaction. (Wiki Article Here)
The steaming hot horsehead is cropped to 1920x1200 "HD" at the full camera resolution. The image above was derived from 108 x 5 minute exposures, 9 hours total, during January 2009 from The Woodlands, TX.
Equipment used: Takahashi TOA 130 Telescope (a 5" APO refractor telescope) and flattener, Astronomik 13nm Hydrogen Alpha filter, AP 900GTO mount, QHY8 CCD Camera. Other pictures from the camera are are here. Images processed using my Astronomy Image Processing Workflow, with the additional step of discarding all the Green and Blue colors in Photoshop. See further thoughts about processing at the bottom of the page.
Other Narrowband Filter Images
Original Horsehead/Flame Nebula Picture Page here; with more info on what you're looking at, and a film image...
Astronomy Pictures: Dick Locke's Astrophoto Gateway page....
Copyright © 2005-2009 Dick Locke. All Rights Reserved.
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