Thank you Richard for this very interesting graph. I brought closer my curve that provides per Mark Kidger to check the coherence of my measurements...
I hasten to point out that it appears the diffuse mass being descibed as the "coma" of 17/P is, since the last full moon, likely only a faction of that...
... In data from several observers, there are indications of a slowing then stabilizing trend in diameters reported before last Full Moon period. ... This is...
Alfredo Pereira
alfxyz@...
Mar 1, 2008 4:18 pm
14036
The offered formula has deduced in connection with own needs and I offer on court of other observers engaged in comets. The formula is necessary in the event...
... I'm afraid this is exactly the kind of formula which does _not_ seem necessary. If a comet is not seen, simply make the best assumption you can about the...
Alfredo Pereira
alfxyz@...
Mar 1, 2008 11:50 pm
14038
It is great to hear you again Alfredo! ☺ Current I'm a bit CCD observer and programming automatic routines For astrometry and photometry of variable stars. I...
Ooops sorry mistake, it should go directly to Alfredo, Apologize, Maciej From: comets-ml@yahoogroups.com [mailto:comets-ml@yahoogroups.com] On Behalf Of Maciej...
The negative estimation of magnitude is a thing very approximate. Estimations of diameter of a coma, especially faint, can strongly different. This formula...
Dear colleagues, Many rendezvous of two comets happen in March. The best will be the rendezvous of Comet Holmes and Chen-Gao, as already pointed out by Andre...
... And how delusive it can be :-) What if the diameter were 1.2' ? And what if it were 0.3' instead ? Sure, DC would in some cases reflect the changing...
Alfredo Pereira
alfxyz@...
Mar 2, 2008 12:35 pm
14045
Artyom, I have another example... My friend observed 17P/Holmes a few days ago with his 15x70B. He could see stars down to 11.0 mag. His estimation of comets...
At application of the given formula it is necessary, that the brightness of a comet was on a limit of visibility of the tool! Probably, it is necessary to...
... Oh, I forgot to add, he noted it was just at the limit of visibility... This comet is so diffuse, that no matter what instrument you use, if your sky is...
Hello, I have seen Comet Holmes to the naked eye at 2nd March next to Szeged, Hungary. Location was at about 5 km NW to the city. Clear sky after cold front....
I agree with John that the apparent shrinkage of the coma of 17P is a result of an ever-increasing part of the coma reaching a surface brightness below that of...
... Hello Gabor, For the benefit of all of us interested, could you (and all those currently publishing _naked eye_ estimates for this object) please be so...
Gabor - the issue of '****SPAM*****' being included in the title of your messages has been previously raised in this group. Would you please ensure you do not...
... Please, Dave. If this is a reason to ban a member or block his messages, then I will propose to the moderator to ban anyone who *really* SPAMs the lists by...
Hi all, ... should act to ban such ... I have to agree with Reiner. The *SPAM* indicator in the subject line is far less annoying than fullquotes and do not...
Hi All IAUC nr. 8923, published yesterday, reports the discovery of a new comet: C/2008 E1 (CATALINA). It has been picked-up with the 0.68m Schmidt + CCD of...
C/2007 W1 (Boattini): 2008 Mar. 6.08 UT: m1=12.7, Dia.=2.2', DC=4, 20 cm SCT (133x). [ Mountain location, very clear sky. Comparison stars taken from Henden...
Dear comets-ml discussion-group members: The International Workshop on Cometary Astronomy is a series of meetings designed to bring together amateur and...
Akimasa Nakamura
nakamura10633@...
Mar 7, 2008 6:08 am
14060
1) Would you be interested in attending a pro-am Comet Workshop either just before or just after the total solar eclipse in Shanghai, China? (a) yes,...
Hi all, as suggested by Akimasa and Dan, please reply to off-list to the e-mail addresses given below the original posting. And - please try to avoid full...
-- Greetings All, Recently Richard Miles called attention here to CCD images by Fred Lehman (Davie, Florida) highlighting the changing morphology of 17P during...
