17P Holmes in Outburst Magnitude
2.3
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| 56 x 3 second CCD image through f/3.3 astrograph |
64 x 3 s DSLR image (D20) through 4-inch refractor --
poor focus due to my crude technique -- I focused on the moon in the
viewfinder and then slewed to the comet. Very low-tech imaging! |
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| This is what I saw through the 4-inch refractor at ~ 60X. I'm pretty sure I saw a faint green cast to the coma. | Color-intensity map to aid in visualizing the coma. The ion tail is just bare perceptible. | Isophotes (lines of constant intensity, like the elevation lines on a topo map). |
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| Orbital parameters courtesy of http://neo.jpl.nasa.gov/orbits/ | Here is a screen shot from SkyMap Pro http://www.skymap.com/ showing the location of the comet in Perseus. The nearly full moon was only 25 degrees away, but did not interfere with imaging or observing. |
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| Here is the light curve, courtesy of
http://www.aerith.net/comet/catalog/0017P/2007.html
I have inverted the image of Seiichi's light
curve so my viewers won't lose their dark adaptation <G>. The link above contains considerable useful comet information. |
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Igloo as seen from outside |
Inside view of Igloo Observatory |
See my other, weather-independent hobby --
http://home.att.net/~dpersyk/horr.htm
My paper on design of embedded piers is here -- http://home.att.net/~dpersyk/Pier_Design.htm
Thanks for looking and for feedback.
Images on the New Images page are changed from time to time, so the next time you return, there may be a different image.
Email comments appreciated at
dpersyk@att.net
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