I have imaged this comet on Nov. 17.52 UT remotely from D25 Tzec Maun Observatory. I also had some doubt about its magnitude - certainly brighter than 17.6m,...
Rob, Sincere thanks for your image and kind words. 169P is now approaching perihelion ( T 2009 Nov. 30, q=0.608 AU ), developing a wide faint coma. A very dark...
Interesting. I imaged the comet's position on Nov 11.4 and nothing was visible brighter than mag 13. So this looks like a very recent development. Terry...
Hi Juan! I managed to get a rough widefield image of the field tonight in fairly poor sky conditions (dust). 169P shows (just), but it appears to be...
Dear all: Concerning comet 107P we need high precision photometry to detect even minute changes in its brightness. In that regard there is a nice calibration...
Hi all, I first tried to spot C/2009 Q4 Boattini on October 21 in my 37cm reflector but was unable to see it. This Sunday morning Nov. 15 I was surprised to ...
Hi all, I have updated my analysis of the currently observable comets. You can find them at http://kometen.fg-vds.de/aktause.htm Regards, Andreas PS: third(!)...
Hi all, I have updated my analysis of the currently observable comets. You can find them at http://kometen. fg-vds.de/aktause.htm Regards, Andreas PS: second...
Comet 81P has developed a nice tail on images this morning Twitter: http://twitter.com/cbellh47 Flickr: http://www.flickr.com/photos/cbellh47/ Facebook:...
Hi everyone, Does anyone have orbital elements for 107P? I found an incomplete set online but none that list the perihelion date and distance for this...
Dear Rob McNaught, ... Thank you for your information. I read IAUC 9087 again, and I see that you discovered P/2009 U4 on Oct. 23, and then you found the...
Dear Rob Matson, Thank you for your comments. I guess the next return of P/2009 Q1 (Hill) can prove the linkage of your data in 1996 and 1998. Best regards, ...
Hello Francois and all. this morning 29P measures bring the same result as your observations. nuclear mag. 13.71 nuclear magn. 10" coma diameter = 9.6" ...
(4015) Wilson-Harrington was an object of study by the Midcourse Space Experiment (MSX) mission Mission images are available in the Planetary Data System MSX...
Dear Ignacio and all. ... Science works on data and experimental facts, and here we have only *one* observational evidence about a certain occurence. Then,...
Hi everyone, I am happy to see this worthwhile discussion on this most interesting object, and like the other posters I would encourage physical observation ...
I agree with Richard Miles that this is how science works. So it is fascinating to see so many hypothesis poping up. In this regard I would like to point out...
Giovanni, I guess this is how science works, people come forward with options for working hypotheses and these are then compared with experimental observation....
Dear Richard yours is a fashinating working hypothesis (as there are many others). Obviously, without a robust experimental support, I'm afraid it will remain...
Dear Giovanni, Some meteorites and presumably asteroids contain a significant proportion of hydrated minerals. Energetic particles from a solar flare would...
Dear all, In the case of non-main belt, NEO comets like 107P (apollo) and 162P (amor) the tails have been found to be of Ionic nature (107P Yanga Fernandez et ...
Dear Richard and all. ... In the few instances where asteroidal object have shown discontinuous signs of cometary activity (e.g. the so called "main belt...
I was tempted to try 107P from SSO (0.61-m, no filter) during this lunation and stack a bunch of 90-second images. On clear nights, I routinely get down to...
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