... of C/2004 H6 in August Hello, at the time of the Visnjan School of Astronomy, thanks to Reiner, I made some photometry on C/2004 H6 (SWAN) out of the...
7327
Seiichi Yoshida
seiichi_yosh...
Sep 1, 2004 9:03 am
Dear colleagues, ... Akimasa Nakamura did photometry of C/2004 H6 on Aug. 16. The comet was still so bright as 13.4 mag with a large coma of 2.2 arcmin and...
7328
Greg Crinklaw
capellasoft
Sep 1, 2004 3:49 pm
... That's one of the fun things about comet observing--you can never be certain of what you will find from night to night. Hey, at least my comet magnitudes...
7329
Dennis Persyk
dennis_persyk
Sep 1, 2004 4:31 pm
Hi Greg, Again, with all due respect and lots of intended humor, you would not be confused at all it you read the messages on this great list! Maik Meyer...
7330
Maik Meyer
maiki666
Sep 1, 2004 4:48 pm
Hi Dennis, ... the difference may not be that much since the magnitude at this page is indicated with N which means that it refers to a so-called "nuclear"...
7331
Greg Crinklaw
capellasoft
Sep 1, 2004 4:55 pm
... Well, I guess you are kidding since it is in fact the messages here that are confusing me! Based on the most recent magnitude it appears this comet should...
7332
Dennis Persyk
dennis_persyk
Sep 1, 2004 5:42 pm
Hi Maik, Thanks for the explanation. It is very useful and I hope the imagers on the Comets – Images group are taking notes. I do not understand the...
7333
Sebastian F. Hoenig
sfhoenig
Sep 1, 2004 5:57 pm
Hello all, Having got some more observation of comet Machholz now spanning an arc from Aug 27 - Sep 01 I first have to admit that my pessimistic suggestion of...
7334
Greg Crinklaw
capellasoft
Sep 1, 2004 5:57 pm
... I doubt that's the reason: even using standard magnitude parameters adjusted to fit the most recent observation you should get a reasonable magnitude for...
7335
Piotr Guzik
piotrek16
Sep 1, 2004 6:10 pm
Hi Dennis ... Nuclear magnitude is brightness of so-called nucleus or central condesation. You should realise that outer coma also produce a light so summary...
7336
Paulo Benard Guedes
paulobg
Sep 1, 2004 6:17 pm
Hi: I've been reading this post with great interest. Because I only started imaging comets recently this information has been very helpfull. But there is a...
7337
Greg Crinklaw
capellasoft
Sep 1, 2004 6:19 pm
... Huge sigh. -- Greg Crinklaw Astronomical Software Developer Cloudcroft, New Mexico, USA (33N, 106W, 2700m) SkyTools Software for the Observer: ...
7338
Piotr Guzik
piotrek16
Sep 1, 2004 6:41 pm
... Ok, You shouldn't trust magnitudes from most of planetarium programs :) [Non-text portions of this message have been removed]...
7339
Greg Crinklaw
capellasoft
Sep 1, 2004 6:45 pm
... Heh. That's better! -- Greg Crinklaw Astronomical Software Developer Cloudcroft, New Mexico, USA (33N, 106W, 2700m) SkyTools Software for the Observer: ...
Trying to give some additional information ... My reports were: C/2004 H6 (SWAN): 2004 Aug. 21.06 UT: m1=12.2, Dia.=2', DC=0, 20 cm SCT (77x) ( Alto del Castro...
7341
John Drummond
john_drummon...
Sep 1, 2004 8:32 pm
Bingo Greg, you hit the nail right on the head. My images of this comet naturally bring out much more than my visual observations - until my last observation...
7342
gvnn64
Sep 1, 2004 9:59 pm
Hello, I think that there is an interesting issue that is blinking behind the scene in this discussion about C/2004 H6 (SWAN). For visual estimations, it's...
7343
Greg Crinklaw
capellasoft
Sep 1, 2004 10:07 pm
... Why bother with aperture photometry? Why not simply extract a brightness profile across the comet? Heck, even a simple measure of FWHM (full width at...
7344
gvnn64@...
gvnn64
Sep 1, 2004 10:17 pm
... Hello Greg, OK, this is the first (and most trivial) solution I listed. The problem with it arises when you try to measure a very diffuse and faint coma...
7345
Greg Crinklaw
capellasoft
Sep 1, 2004 10:40 pm
... I somehow missed that line. Sorry. Maybe it's time to go home now; it's been a long day. :-) ... It might, but I suspect you would run into the same...
7346
jmotalmeida
Sep 2, 2004 5:49 am
Hi my friends, I am an amateur astronomer Portuguese. My name is Jorge Almeida. Paulo Guedes is a friend of mine that advice to me this great list. In next...
7347
gvnn64@...
gvnn64
Sep 2, 2004 8:21 am
... This sounds interesting! Giovanni...
7348
Seiichi Yoshida
seiichi_yosh...
Sep 2, 2004 2:29 pm
Dear colleagues, I searched pre-discovery rendezvous of C/2004 Q2. Please see the web pages for more information: ...
7349
Maik Meyer
maiki666
Sep 2, 2004 6:49 pm
Paulo, ... http://cfa-www.harvard.edu/icq/CometMags.html http://www.shopplaza.nl/astro/ http://encke.jpl.nasa.gov/RecentObs.html ... Cheers, Maik -- If they...
7350
Greg Crinklaw
capellasoft
Sep 2, 2004 6:58 pm
... And of course: http://www.skyhound.com/sh/comets.html -- where this information is gathered from a variety other sources and presented is a useful format ...
7351
Paulo Benard Guedes
paulobg
Sep 2, 2004 7:25 pm
Just what I was looking for. Great links Thank you Paulo ... De: Maik Meyer [mailto:maik@...] Enviada: quinta-feira, 2 de Setembro de 2004 19:49 ...
7352
grunwalder2002
Sep 3, 2004 1:37 am
... count on ... that ... Is there any vetting of the observations posted there? If not, a vetted list from a reliable source, such as the sites posted by Maik...
7353
Greg Crinklaw
capellasoft
Sep 3, 2004 2:48 am
Hi Gareth, ... It depends on what your interest is. There is a growing (hopefully) interest in the recreational visual observation of comets, sort of like ...
7354
rstoss@...
rms1kpde
Sep 3, 2004 3:02 am
... If the aim is to make independent observations, then it is best to not check any website/yahoogroup at all which lists recent observations by others. For...
7355
Greg Crinklaw
capellasoft
Sep 3, 2004 3:21 am
... Of course--and this is the reason that ICQ holds back some of its recent magnitudes--but I feel very strongly that this is something that any *good*...
