Not a good sign, folks. On Wednesday, October 9, 2013 12:20 PM, "respuestas2013@gmail.com" <respuestas2013@gmail.com> wrote:   Hi all: I have placed comet ISON in ORANGE ALERT. The reason?  The secular light curve is showing  signs of leveling off:    http://astronomia.udea.edu.co/cometspage In the past, with comets LINEAR, Tabur, Honig and  Elenin, just after the leveling off, the comet  disintegrated. WE NEED URGENT CONFIRMATION OF THIS TREND I REQUEST TO CCD-R, CCD-V AND VISUAL OBSERVERS TO SEND THEIR *SERIES* OF OBSERVATIONS TO ME AT respuestas2013 at gmail.com as soon as possible.  DO NOT SEND ISOLATED OBSERVATIONS. SEND YOUR *SERIES*.  Use a simple .txt format YEAR MONTH DAY MAGNITUDE The first time you do specify the instrument aperture, band and type.   If you do that: a) you will make my life easier. b) I will be able to update the light curve daily c) you will appear in the light curve d) you will help define the trend  I have  evidence to conclude  that the comet is shedding off large particles, as  large as 1 cm or even larger.    If you look at the images, there are no filaments, there are no streamers, just a diffuse light consistent with a  dust tail. Accordingly light from the continuum would dominate over the gas. Could anybody take a spectrum of the comet in the  visual and publish it as soon as possible ?  Can anybody confirm or deny this ? Kind regards, Ignacio Institute of Physics University of Antioquia oooooooooooooooooooooooooooooooooooo __._,_.___ Reply via web post Reply to sender Reply to group Start a New Topic Messages in this topic (1) Recent Activity: Visit Your Group Switch to: Text-Only, Daily Digest • Unsubscribe • Terms of Use • Send us Feedback . __,_._,___