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17P Holmes
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0bject |
Comet 17P Holmes |
| Date | April 5, 2008 |
| Exposure | LRGB 10:10:10:10 (unbinned, DDP applied) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi FSQ 106N f/5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, FITS Liberator, GradientXterminator |
| Comments | Cool, clear and damp |
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0bject |
Comet 17P Holmes |
| Date | March 10, 2008 |
| Exposure | LRGB 15:15:15:15 (unbinned, luminance synthesized, DDP applied) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi FSQ 106N f/5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, FITS Liberator, GradientXterminator |
| Comments | Mild (40� F) and clear; 3 day old moon nearby |
Click HERE for an exponential stretch showing the halo.
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0bject |
Comet 17P Holmes |
| Date | March 5, 2008 |
| Exposure | LRGB 5:5:5:5 (unbinned, cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi FSQ 106N f/5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, FITS Liberator |
| Comments | Mild (40� F) with snow cover |
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0bject |
Comet 17P Holmes |
| Date | February 18, 2007 |
| Exposure | LRGB 5:5:5:5 (unbinned) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi FSQ 106N f/5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, GradientXterminator |
| Comments | Cold and windy; bright moon. First light for FSQ! |
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0bject |
Comet 17P Holmes |
| Date | January 27, 2007 |
| Exposure | LRGB 10:10:10:10 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, GradientXterminator |
| Comments | Cold |
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0bject |
Comet 17P Holmes (with Algol, β Persei) |
| Date | January 23, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, GradientXterminator |
| Comments | Cold (9� F); moderate seeing |
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0bject |
Comet 17P Holmes (with Algol, β Persei) |
| Date | January 22, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, GradientXterminator |
| Comments | Cold (30� F); clear, moon near full |
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0bject |
Comet 17P Holmes (with Algol, β Persei) |
| Date | January 20, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, GradientXterminator |
| Comments | Cold (16� F); clear, some thin clouds; moon 1 day past full |
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0bject |
Comet 17P Holmes |
| Date | Januar 15, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (36� F); very good seeing but 1st quarter moon high in the sky |
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0bject |
Comet 17P Holmes |
| Date | Januar 14, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (30� F); good seeing |
Mouse over to see a Larson-Sekanina overlay
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0bject |
Comet 17P Holmes |
| Date | Januar 11, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Mild (45� F); moderate seeing |
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0bject |
Comet 17P Holmes |
| Date | December 31, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (26� F); unsteady seeing, windy, with clouds blowing through |
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0bject |
Comet 17P Holmes |
| Date | December 30, 2007 |
| Exposure | LRGB 8:8:8:8 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (36� F); shorter integrations by accident |
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0bject |
Comet 17P Holmes |
| Date | December 25, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (36� F); waning moon rising |
Click HERE for an inverted view (Luminance)
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0bject |
Comet 17P Holmes |
| Date | December 23, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2, GradientXterminator |
| Comments | Cold (32� F); full moon causing nasty gradients |
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0bject |
Comet 17P Holmes |
| Date | December 18, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Mild (40� F) some thin high clouds; waxing moon |
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0bject |
Comet 17P Holmes |
| Date | December 16, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (28� F) and clear but with a few high clouds; 1st quarter moon |
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0bject |
Comet 17P Holmes |
| Date | December 13, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (28� F) with moderate seeing; a few high clouds |
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0bject |
Comet 17P Holmes |
| Date | November 29 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cool (45� F) with moderate seeing |
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0bject |
Comet 17P Holmes |
| Date | November 27 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped; DDP applied to luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cool (45� F) with moderate seeing |
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0bject |
Comet 17P Holmes |
| Date | November 24 2007 |
| Exposure | LRGB 45:15:15:15 (unbinned and cropped; luminance synthesized from RGB) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold (30� F) with the full moon nearby in the sky |
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0bject |
Comet 17P Holmes |
| Date | November 20, 2007 |
| Exposure | LRGB 45:15:15:15 (unbinned and cropped; luminance synthesized from RGB) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Warm, moderate seeing, comet about 40� above horizon |
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0bject |
Comet 17P Holmes |
| Date | November 19, 2007 |
| Exposure | LRGB 45:15:15:15 (unbinned and cropped; luminance synthesized from RGB) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Warm, moderate seeing, comet about 40� above horizon |
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0bject |
Comet 17P Holmes |
| Date | November 17, 2007 |
| Exposure | LRGB 45:15:15:15 (unbinned and cropped; luminance synthesized from RGB) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cool, moderate seeing, comet about 60� above horizon |
Click HERE for luminance only - log stretched
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0bject |
Comet 17P Holmes |
| Date | November 16, 2007 |
| Exposure | LRGB 15:15:15:15 (unbinned and cropped) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cool, moderate seeing, comet about 60� above horizon |
Click HERE for an inverted view
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0bject |
Comet 17P Holmes |
| Date | November 15, 2007 |
| Exposure | LRGB 45:15:15:15 (unbinned and cropped) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head w/ E-finder |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cold, moderate seeing, comet about 45� above horizon |
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0bject |
Comet 17P Holmes |
| Date | November 11, 2007 |
| Exposure | BRGB 45:24:24:24 (unbinned and cropped; Blue used for luminance) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Warm, moderate seeing, comet low ~30� |
Click HERE for an inverted view
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0bject |
Comet 17P Holmes |
| Date | November 5, 2007 |
| Exposure | L+B 45:60 (unbinned and cropped; DDP and exponential stretch) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Cool and clear, breezy |
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0bject |
Comet 17P Holmes |
| Date | November 4, 2007 |
| Exposure | LRGB 30:15:15:15 (unbinned and cropped) |
| Camera | STL11000 with Astronomik filters |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Moderate seeing with noticeable sky glow |
Mouse over for stretched view; click HERE for an inverted image
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0bject |
Comet 17P Holmes |
| Date | November 3, 2007 |
| Exposure | 10 x 180 seconds (unbinned) |
| Camera | STL11000 |
| Telescope | Takahashi Sky90@ f/4.5 on Losmandy G11 w/Gemini |
| Guiding | remote guide head |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Long exposure to reveal tail(s) |
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0bject |
Comet 17P Holmes |
| Date | October 30, 2007 |
| Exposure | LRGB 8 x 30 (30 sec subexposures x 8 binned 2x2; L synthesized RGB) |
| Camera | ST2000XM with SBIG filters |
| Telescope | Celestron C8 @ f/5 on Losmandy GM-8 |
| Guiding | unguided |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Bob Judd and Gregg Ruppel; comet halo continues to expand; mouse over image to apply rotational gradient filter |
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0bject |
Comet 17P Holmes |
| Date | October 29, 2007 |
| Exposure | LRGB 20 x 5 (5 sec subexposures x 20 unbinned; L synthesized RGB) |
| Camera | STL11000M with Astronomik filters |
| Telescope | Takahashi Sky90 @ f/4.55 on Losmandy G11 w/ Gemini |
| Guiding | unguided |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Comet seems to have dimmed slightly; green halo faintly visible. |
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0bject |
Comet 17P Holmes |
| Date | October 28, 2007 |
| Exposure | RGB 20 x 5 (5 sec subexposures x 20 unbinned) |
| Camera | STL11000M with Astronomik filters |
| Telescope | Takahashi Sky90 @ f/4.55 on Losmandy G11 w/ Gemini |
| Guiding | unguided |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Comet still low (~30�); still fairly bright - mag 2.5; a bright star shining through the halo gives the appearance that the nucleus has split. |
Larson Sekanina filter applied;
color composite (10/27/2007)
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0bject |
Comet 17P Holmes |
| Date | October 27, 2007 |
| Exposure | RGB 10:10:10 (30 sec subexposures x 20 unbinned) |
| Camera | ST2000XM with SBIG filters |
| Telescope | Celestron C8 @ f/5 on Losmandy GM-8 |
| Guiding | unguided |
| Processing | MaximDL, PhotoshopCS2 |
| Comments | Bright moon in sky |
Synthesized luminance from R+G+B
Color image with rotational gradient (Larson-Sekanina)
overlay
Rotational gradient (5%) applied to luminance (Larson-Sekanina)
