DJ Eastern Missouri, USA Bushnell 8x42's, SV80ed, Nexstar 130SLT, C5+, 8" LX200 Classic, 10" f/7 Cave, Orion XT10 w/Moonlite focuser
Orion xx14g Dob CPC 1100 w/Skywatcher 80ED piggybacked Coronado PST TMB 92L refractor AT Voyager mount Nexstar 6/8 mount Denk Big Easy binoviewers Oodles of eyepieces and other optical gadgets Past scopes Meade 8" reflector and 8" SCT
I want to do more then just look.
Quote:I think one of the biggest unknowable variables determining comet brightness is the amount of ice and other volatiles on board and close to the surface of the comet. If there's a lot then propsects for a good display are high; if not, it's more of a dud. No way to tell, but if this is indeed a first-time passage for the comet thereis hope that it is basically pristine with a lot more stuff to ablate/outgas away, making for a better show.
Quote:but the thing I'm struggling with is the thought that if there is a lot of ice at the surface won't that increase the reflectivity - such that its brightness-magnitude at current distance would be a good indicator?
Televue 85/TRF-2008 field flattener, Meade LX200 10", Manfrotto 055SSB tripod/410 geared head/AstroTrac TT320X-AG/056 3D head, GM-8/Gemini, 10 Micron 1000 HPS, Canon 40D (unmodded), Canon 450D (modded w/Astronomiks clip-ins - UV/IR, OWB), Coronado SM60/Lunt B1200/WO diagonal, Baader Herschel Wedge Leeds Sky Clock Ripon Sky Clock
Quote:By the way Kahoutec did not dispoint me - it was my first observed comet and it was magnificent with a decent tail readily observable both by eye and binnoculars. Over hypeping did not detract from the actual performance
Quote:Here is a great article from Nasa history archives detailing how it all went down.
Quote:The latest measurements of ISON (reported to todays Yahoo comets-ml group) are indicating that the initial predictions are a little conservative! It appears to be unusually dust active already. However the caution re the risk of fragmentation still holds and probably won't go away at any point for this apparition. If it holds together until it at least passes the orbit of Mars in its post perihelion phase then we should be in for a visual treat!
Tak-106, AP900GTO, Unitrons, Masuyamas
The optimist thinks this is the best of all possible worlds. The pessimist fears it is true. "J. Robert Oppenheimer"
Crazy ATM 6" F9.4 Newtonian first light July 2011 8" F/5.6 Dob, first light June 2003 12.5" F/5 Dob, first light Aug 2007, as well as 9- 4" f/6 mirrors. In progress:12" f/7 on quartz, 18" F/5 on BVC, and a set of 3-8" optical flats All optics by yours truly.