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Comet c2007 N3 Lulin
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Comet c2007 N3 Lulin (passing δ Geminorum)
Date 3/16/2009
Exposure LRGB 10:10:10:10 (unbinned & cropped; median combined stars & comet separately)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Cool 50F; clear with good transparency

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Full resolution crop

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Comet c2007 N3 Lulin (passing the Eskimo Nebula, NGC 2392)
Date 3/14/2009
Exposure LRGB 10:10:10:10 (unbinned; median combined stars & comet separately)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Cool 45F; high clouds blowing through

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Comet c2007 N3 Lulin
Date 3/8/2009
Exposure LRGB 11:11:11:11 (unbinned; median combined stars & comet separately)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Cool 45F; waxing gibbous moon high in the sky

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Comet c2007 N3 Lulin and M44 (Beehive)
Date 3/5/2009
Exposure RGB 10:10:10 (binned 3x3; median combined stars & comet separately)
Camera STL11000M with Astronomik filters
Telescope FSQ 106N f/5 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Warm and humid

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  Inverted luminance

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Comet c2007 N3 Lulin
Date 2/28/2009
Exposure RGB 10:10:10 (unbinned & cropped; median combined stars & comet separately)
Camera STL11000M with Astronomik filters
Telescope FSQ 106N f/5 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Cold and very windy

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Inverted luminance

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Comet c2007 N3 Lulin
Date 2/22/2009
Exposure RGB 10:10:10 (unbinned & cropped; median combined stars & comet separately)
Camera STL11000M with Astronomik filters
Telescope FSQ 106N f/5 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Moderate seeing & light pollution

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Inverted luminance view

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Comet c2007 N3 Lulin
Date 2/19/2009
Exposure LRGB 10:10:10:10 (unbinned & cropped; luminance synthesized from R+G+B)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Clear and quite cold 17F

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Comet c2007 N3 Lulin
Date 2/18/2009
Exposure RGB 8:8:8 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Some high thin clouds and quite a few satellite trails

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Single 1 minute RGB  Inverted Green 60 seconds

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Comet c2007 N3 Lulin
Date 2/16/2009
Exposure RGB 10:10:10 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Lots of nasty gradients from moon and local light pollution

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Comet c2007 N3 Lulin
Date 2/12/2009
Exposure LRGB 6:6:6:6 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Mild temps but 3/4 moon nearby in the sky wiped out the tail

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Luminance image

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Comet c2007 N3 Lulin
Date 2/7/2009
Exposure Luminance only 10x120 sec (unbinned and inverted)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Windy, mild and very poor seeing (6+ arcseconds)

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Inverted view Luminance only

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Comet c2007 N3 Lulin
Date 2/6/2009
Exposure LRGB 2:2:2:2 (unbinned)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-Finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Comet very near Zubenelgenubi

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Comet c2007 N3 Lulin (tail disconnect)
Date 2/4/2009
Exposure Luminance only 120sec each;  300 sec (last image)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Self guided (internal)
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Comet well up in the East in Libra; very cold 13F

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Comet c2007 N3 Lulin
Date 1/31/2009
Exposure LRGB 10:10:10:10 (Luminance synthesized, binned 2x2 and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Comet well up in the East in Libra; some high thin clouds

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Inverted view 012909

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Comet c2007 N3 Lulin
Date 1/29/2009
Exposure LRGB 10:10:10:10 (Luminance synthesized, binned 2x2 and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Comet well up in the East in Libra; cold 17F 

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False color of the above image

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Comet c2007 N3 Lulin
Date 1/24/2009
Exposure Luminance only 4x180 sec (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet well up in the East in Libra; very cold 13F 

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False color of the comet

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Comet c2007 N3 Lulin
Date 1/22/2009
Exposure LRGB 8:10:10:10 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet well up in the East in Libra; some high thin clouds. 

Click for higher resolution

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Comet c2007 N3 Lulin
Date 1/21/2009
Exposure RGB 4:4:4 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet about 26 above Eastern horizon; waning moon 14 degrees East. 

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Inverted to show tail

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Comet c2007 N3 Lulin
Date 1/15/2009
Exposure LRGB 16:6:6:6 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet about 24 above Eastern horizon; very cold (1 F ). 


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Close encounter with a satellite

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Comet c2007 N3 Lulin
Date 1/11/2009
Exposure LRGB 16:6:6:4 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet about 22 above Eastern horizon; very cold and clear.  Full moon wiped out the tai and anti-tail.

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Stretched view

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Comet c2007 N3 Lulin
Date 1/8/2009
Exposure LRGB 6:6:6:6 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope ASA 10N f/3.6 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet about 20 above Eastern horizon; very cold and clear

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Wide field   Inverted (Tail?)

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Comet c2007 N3 Lulin
Date 1/1/2009
Exposure RGB 6:6:6 (unbinned and cropped)
Camera STL11000M with Astronomik filters
Telescope Takahashi FSQ 106N f/5 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3
Comments Comet about 16 above Eastern horizon; thin clouds

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Stretched and inverted - tail?

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Comet c2007 N3 Lulin
Date 12/30/2008
Exposure RGB 5:5:5 (unbinned)
Camera STL11000M with Astronomik filters
Telescope Takahashi FSQ 106N f/5 on Losmandy G11 w/ Gemini
Guiding Remote guide head with E-finder
Processing MaximDL, PhotoshopCS3, GradientXterminator
Comments Comet about 12 above Eastern horizon

                                    All text and images Gregg L. Ruppel 1998-2008.