Aj, I have a 48mm swan band filter, Ill try to get images of the comet with the CCD and well see whats out there! Chris --- AJ Crayon <acrayon@xxxxxxx> wrote: > In response to Frank Uralic's request for anyone > using this kind of filter I can respond to a yes I > have and did so last night, Thursday. Steve Coe, a > full moon, some bright yard lights and I were out > north of Scottsdale, AZ with my 8" SCT at about > 145X. Without the filter this is a magnificent, yet > mysterious, comet. Don't know what I can supply for > an observation that hasn't been said before. Yes it > does have obvious planetary nebula like features. > It is round, large, bright with an extremely > brighter coma and a stellar nucleus that is offset > from the coma. I didn't attempt to measure its > position. With the Swan Band there is a much > fainter fan shaped halo of about 1/2 again larger > than the entire comet. A surprise to me as this > hasn't shown up in Jeremy Perez's excellent drawings > nor any of the astroimages. The comet was at about > the focus of the halo, which is about where one > would be expected. Unfortunately I didn't try to > measure the position angle so can't sa > y much about that. > The Swan Band filter is supposed to make comets that > consist mostly of gas brighter and those mostly of > dust fainter. So my suspicion is there is a little > more gas than dust. Yet, other than the halo, never > did we see any hint of a tail. > > Hope this helps. > > Clear skies, > AJ Crayon > > -- > See message header for info on list archives or > unsubscribing, and please > send personal replies to the author, not the list. > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.