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...
14034
cnj999
Mar 1, 2008 2:55 pm
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...
14035
Alfredo Pereira
alfxyz@...
Mar 1, 2008 4:18 pm
... In data from several observers, there are indications of a slowing then stabilizing trend in diameters reported before last Full Moon period. ... This is...
14036
artnovich
Mar 1, 2008 9:43 pm
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...
14037
Alfredo Pereira
alfxyz@...
Mar 1, 2008 11:50 pm
... 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...
14038
Maciej Reszelski
macres78
Mar 2, 2008 12:23 am
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...
14039
Maciej Reszelski
macres78
Mar 2, 2008 1:11 am
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...
14040
artnovich
Mar 2, 2008 6:44 am
I shall bring an example. C/2007 B2 (Skiff): 2008 Feb. 10.08 UT: m1=14.2, Dia.=0.6', DC=5, 20 cm SCT (133x). [ Mountain location, very clear sky. Nearby field...
14041
artnovich
Mar 2, 2008 6:47 am
The negative estimation of magnitude is a thing very approximate. Estimations of diameter of a coma, especially faint, can strongly different. This formula...
14042
Seiichi Yoshida
seiichi_yosh...
Mar 2, 2008 6:54 am
Dear colleagues, Here is the list of interesting rendezvous with bright clusters and nebulae in March. For more rendezvous events, please see: ...
14043
Seiichi Yoshida
seiichi_yosh...
Mar 2, 2008 6:55 am
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...
14044
Alfredo Pereira
alfxyz@...
Mar 2, 2008 12:35 pm
... 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...
14045
Piotr Guzik
piotrek16
Mar 2, 2008 1:07 pm
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...
14046
Artyom Novichonok
artnovich
Mar 2, 2008 1:31 pm
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...
14047
Piotr Guzik
piotrek16
Mar 2, 2008 1:39 pm
... 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...
14048
Juan Jose Gonzalez Su...
jjgsgp
Mar 2, 2008 4:28 pm
C/2008 C1 (Chen-Gao): 2008 Mar. 1.85 UT: m1=10.2, Dia.=4', DC=2, 25x100B. [ 20 cm SCT (77x): m1=10.4. Faint, diffuse outer coma. ] ( Alto del Castro - Aralla,...
14049
Gabor Santa
santa.gabor
Mar 3, 2008 9:23 am
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....
14050
kammerer_a
Mar 3, 2008 4:10 pm
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...
14051
Alfredo Pereira
alfxyz@...
Mar 3, 2008 5:56 pm
... 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...
14052
Gabor Santa
santa.gabor
Mar 4, 2008 12:26 pm
... Hi, The method was Sidgwick. Gabor...
14053
Dave Herald
dave_herald
Mar 4, 2008 12:40 pm
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...
14054
Gabor Santa
santa.gabor
Mar 4, 2008 12:41 pm
... Hi, The method was Sidgwick. Gabor...
14055
Reiner M. Stoss
rms1kpde
Mar 4, 2008 1:23 pm
... 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...
14056
Maik Meyer
maiki666
Mar 4, 2008 3:47 pm
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...
14057
walcom77
Mar 5, 2008 1:14 pm
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...
14058
Juan Jose Gonzalez Su...
jjgsgp
Mar 6, 2008 2:31 pm
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...
14059
Akimasa Nakamura
nakamura10633@...
Mar 7, 2008 6:08 am
Dear comets-ml discussion-group members: The International Workshop on Cometary Astronomy is a series of meetings designed to bring together amateur and...
14060
pat stonehouse
discoverer98
Mar 7, 2008 2:15 pm
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,...
14061
Maik Meyer
maiki666
Mar 7, 2008 2:20 pm
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...
14062
Alfredo Pereira
alfxyz@...
Mar 8, 2008 3:20 pm
-- Greetings All, Recently Richard Miles called attention here to CCD images by Fred Lehman (Davie, Florida) highlighting the changing morphology of 17P during...
