#12491 Apr 4, 2005
On July 4, the NASA Deep Impact probe will crash into periodic comet
9P/Tempel 1. Hopefully the impact will cause a dramatic increase in
brightness. Meanwhile, I have been imaging 9P as it slowly wends
its way through Virgo. Images and accompanying data at
Last night afforded a unique imaging opportunity: There were no
stars brighter than magnitude 15 within 3 arc minutes of 9P. That
allowed me to guide on the comet head and obtain a relatively high
statistics image of the comet structure uncluttered by star trails.
My previous comet guiding attempts were foiled when the comet would
pass over a star. My VLM was only 2.5 but long integration time
eventually wins out over light pollution.
The image comprises 8 x 10 minutes with the E160 and SXV-H9 camera.
I have added isophote and color intensity contours and some
additional supporting data to my New Images page.
My sincere thanks to Jeff Terry for loan of the H9 camera and to
Giovanni Sostero (Remanzacco Observatory, Italy) for the method of
employing the Rainbow Palette in AstroArt 3 to bring out structure.
Thank you for visiting my site.
Igloo Observatory Home Page dpersyk.home.att.net
New Images home.att.net/~dpersyk/