... Now ... how does your point density translate into surface brightness (perhaps measured in Hale-Bopp or McNaught units :-)? All we want to know -...
20606
Uwe Pilz
piu1958
Feb 1, 2013 1:32 pm
... I started with a real photograph,and tried to fit the dust production rate with the image. This rate I left constant. It is not very helpful to use the...
20607
Uwe Pilz
piu1958
Feb 1, 2013 1:39 pm
Again me, sorry. I prepared a simulation for 2011L4@20130515 [1] , (n=2.7) which uses the same parameters as used for McNaught in my comparation. You can have...
20608
stuartatkinson2013
stuartatkins...
Feb 1, 2013 3:50 pm
Many thanks for sharing those remarkable renders with us Uwe, and congratulations too! Quite spooky matches between your simulations and the actual appearance...
20609
hiro
hiroc070717
Feb 1, 2013 3:54 pm
Dear observers, The comet appeared to have a tiny dust tail toward the south east. http://www.flickr.com/photos/hiroc/8434608297/ Regards, hiro...
20610
obrazell
Feb 1, 2013 4:08 pm
To me this is looking more and more like a Kohoutek and of little interest to the general public. Owen ... From: comets-ml@yahoogroups.com To: Cc: Sent:Fri, 01...
20611
Eddie
eddiestardust
Feb 1, 2013 6:07 pm
Kohoutek was just barely naked eye from suburban Akron,Ohio but was my very first Comet and I think was beautiful. Even IF Pannstarrs is not as bright, it's...
20612
P. Clay Sherrod
drclay2002
Feb 1, 2013 6:49 pm
Yes....we confirm this from Fe. 1 (UT), in a ESE direction from the coma. Clay _____ Dr. P. Clay Sherrod Arkansas Sky Observatories MPC H45 - Petit Jean...
20613
ligustri rolando
astroligu2002
Feb 1, 2013 7:35 pm
Hi, confirm your observation http://www.astrobin.com/31440/ regards Rolando Ligustri ... From: "hiro" <hiroc070717@...> To: <comets-ml@yahoogroups.com> ...
20614
Alan Watson
algwat
Feb 2, 2013 1:37 am
Gidday All, A Very stimulating set of ideas I have a Few thoughts. Are there three types of simulations? Simulation based on observational parameters, coma...
20615
hiro
hiroc070717
Feb 2, 2013 2:44 am
Thanks for the confirmation. hiro...
20616
hiro
hiroc070717
Feb 2, 2013 2:57 am
Hi, Thank you for the confirmation. hiro...
20617
James
skinn85
Feb 2, 2013 4:54 am
Uwe, These are really great! Thanks, Jim...
20618
Rob MM
robmm76
Feb 2, 2013 5:47 am
I'm in Salt Lake City. How do I find them? To: comets-ml@yahoogroups.com From: ed1ward2@... Date: Fri, 1 Feb 2013 18:07:45 +0000 Subject: [comets-ml]...
20619
ligustri rolando
astroligu2002
Feb 2, 2013 8:45 am
http://spaceweather.com/submissions/large_image_popup.php?image_name=rolando-ligustri-C2012S1_130202_1359794565.jpg best regards Rolando Ligustri ...
20620
Jakub Cerny
sigfridkaos
Feb 2, 2013 11:34 am
Hi Uwe, it was just fast though about physical representation of mathematical values. But thanks to your question, i returned to this. I made a simple model of...
20621
starfindersg
Feb 2, 2013 11:35 am
Dear all, A friend of mine has drawn my attention to images of Comet PANSTARRS taken by Roger Groom of Western Australia with a 12" SCT. It shows the...
20622
cnj999
Feb 2, 2013 1:12 pm
I would note that, with PanSTARRS currently situated almost precisely at 1.0 a.u. from the Sun, that the ion tail appears surprisingly weak and ill-defined as...
20623
Kiko
altamira_obs
Feb 2, 2013 1:39 pm
Best Regards Post this animation of T5 2013 January 31, 19 images of 50 sec. Attentively J. F. Hdez. ...
20624
john_drummon...
Feb 2, 2013 1:55 pm
I see that ~mag 0 (???) Comet ISON (C/2012 S1) will be about 1.3 degrees from ~mag 5 Comet Encke (2P) on 25 November 2013 (elongation of 15 degrees). For us in...
20625
Ervin Fleming
endersgt...
Feb 2, 2013 2:02 pm
difficult for us but workable for SOHO. I dont have the hard data on the field of view but 15 degrees is likely beyond its reach. Pity, it would make a nice...
20626
Dave Herald
dave_herald
Feb 2, 2013 2:26 pm
I’ve posted another image, taken on Feb 2 at around 14hrs UT, at: http://tinyurl.com/bhytok5 The image is a stack of 40 x 20-sec exposures. The field is 24 x...
20627
piu1958
Feb 2, 2013 3:37 pm
Dear John and all others, I calculated the dust and gas production. The results are based on - Roettger, Feldman A'Hearn Icarus 86, 10 (1990) [gas production]...
20628
DC
dcbly
Feb 2, 2013 3:47 pm
I noticed that also. I'm at 35deg North and 119deg West for me on November 24th both comets rise about 5:30 PST will be about 6 deg above the horizon at start...
20629
Jakub Cerny
sigfridkaos
Feb 2, 2013 6:26 pm
Dear fellow observers, I am trying to obtain visual observations of comets from ICQ database for many years, unfortunately without any success. The main reason...
20630
denis buczynski
dennis555002
Feb 2, 2013 6:43 pm
Dear Jakub, What a regrettable situation. Amateurs, over many years have submitted observations to this International database freely, in the expectation that...
20631
Ellen Papenburg
ellenpa2000
Feb 2, 2013 7:23 pm
What is the matter with the ICQ? In this day and age of computers and internet it should be relatively easy to keep the data. Is it a physical problem? Are the...
20632
Jakub Cerny
sigfridkaos
Feb 2, 2013 7:28 pm
Dear Ellen and Denis, there are some good news from ICQ that situation maybe gets better in near future, unfortunately for me it do not looks like so near...
20633
Ellen Papenburg
ellenpa2000
Feb 2, 2013 7:33 pm
Okay, fair enough. I have to admit not having followed all conversation here (also the famour lack of time!), but it sounded all very alarming to me. We will...
20634
P. Clay Sherrod
drclay2002
Feb 2, 2013 7:48 pm
I have long said that with ICQ the "devil was in the details". The format became increasingly confusing and in some cases ambiguous with far too much data ...
