Hello all! C/2011 C1: 2011 Mar. 30.79 UT: m1=9.9, Dia=4.5', 18-cm L + CCD Image: ...
17218
David Seargent
seargent@...
Apr 2, 2011 6:15 am
Hi All, It is a pity that this comet is not as intrinsically bright as C/2006 P1 with the prospect of growing an equally extensive dist tail. Had that been the...
17219
Bomber2 Panther
outbackmanyep
Apr 2, 2011 7:56 am
Hi David, I have tried to observe this comet recently and have had no luck, it must be just out of reach of my 10" f/5 dob, using magnifications of x39, x83 &...
17220
Artyom Novichonok
artnovich
Apr 2, 2011 8:23 am
Hello all! C/2010 X1 still very faint for visual observations: 2011 Apr. 01.32 UT: m1=16.2, Dia=0.45' ...21-cm R + CCD Visual observations will possible...
17221
Juan Jose' Gonza&...
jjgsgp
Apr 2, 2011 5:27 pm
Recent visual data: C/2011 C1 (McNaught): 2011 Apr. 1.23 UT: m1=9.1, Dia.=8', DC=3, 25x100B. [ In 20 cm SCT (77x): Tail: 0.2 deg. in PA 260 deg ]. ( Alto del...
C/2010 X1 (Elenin): 2011 Apr. 5.04 UT: m1=14.9, Dia.=0.3', DC=7, 20 cm SCT (133x). [ Strongly condensed object, observed from mountain location under very good...
17223
Leonid Elenin
l.elenin
Apr 5, 2011 7:36 pm
Dear Juan! Your observation is discouraging... On Apr 3 comet has magnitude about 16m (CCD). But we haven't another visual estimates. Perhaps another visaul...
17224
Hidetaka
sedna_90377
Apr 5, 2011 9:47 pm
Hi all, I remotely observed 213P/van Ness tonight and confirmed the increase of the brightness. I estimated its total magnitude as 14.3. This comet experienced...
17225
Alan Hale
ahale15
Apr 6, 2011 4:49 am
Hi everyone, I was unable to detect this comet visually last night: April 5.17 UT, m1 [14.3 (assumed 0.5' coma), 41 cm reflector I took some CCD images of the...
17226
gvnn64@...
gvnn64
Apr 6, 2011 9:45 am
Dear Alan, J. J. and all. ... Probably even fainter. We are continuing our follow-up about this comet. The last CCD photometry we obtained yesterday, provides...
17227
P. Clay Sherrod
drclay2002
Apr 6, 2011 11:16 am
Via CCD 2x binned, with our 0.51m astrograph at f/4.9, we assigned a total magnitude of only 16.3 to the comet tonight, a series of 6 measurements. In fact,...
17228
gvnn64@...
gvnn64
Apr 6, 2011 11:29 am
... Thanks for yours feed-back. At least the CCD measurements seems to be in fairly good agreement among them. Bye, Giovanni...
17229
Leonid Elenin
l.elenin
Apr 6, 2011 11:33 am
Greetings! Actually brightness of comet just returned to predicted magnitude. We can saw brightness hump on March. You can see magnitude graph created by Artem...
17230
gvnn64@...
gvnn64
Apr 6, 2011 11:38 am
Hello Leonid. ... Predicted by who? I was specifically referring to the MPC ephemerids... Bye, Giovanni...
17231
Leonid Elenin
l.elenin
Apr 6, 2011 11:52 am
Hi Giovanni. ... By Artem and Seiichi Yoshida. Photometric model by MPC is not plausible. When I discovered comet, MPES showed magnitude about 17.5m, but the...
17232
kaos@...
sigfridkaos
Apr 6, 2011 12:18 pm
Hello all, I have information about another sucessfully visual catch of comet Elenin by czech comet observer Jakub Koukal. Estimate was made through 24 cm...
17233
gvnn64@...
gvnn64
Apr 6, 2011 12:47 pm
... Leonid, thanks for the information. ... Thanks Jakub. This give us come clues about the visual data consistency. Bye, Giovanni...
17234
Alan Hale
ahale15
Apr 6, 2011 1:56 pm
Hi everyone, ... I note that my unsucccessful visual attempts for this comet have been made with a significantly larger telescope (in very clear skies, 2200...
17235
jbortle@...
cnj999
Apr 6, 2011 2:03 pm
Perhaps a word of caution is advisable here. A half century of serious comet observing and my handling of countless observations made by others has left me...
17236
gvnn64@...
gvnn64
Apr 6, 2011 3:13 pm
Hello Jonh, thanks for yours comments. ... The point I raised is obviously based on the reliability of the visual estimations we have seen so far. If there is...
17237
J.P.Navarro Pina
darkman71es
Apr 6, 2011 3:56 pm
Hi all , I totally agree with the words of Alan and John , on the limit visual of detections of comets we would need more than visual observation of the comet...
17238
Jakub Černý
sigfridkaos
Apr 6, 2011 5:19 pm
Hello Alan, May I ask you, what was your stellar limit magnitude? Best regards, Jakub Cerny Czech Republic From: comets-ml@yahoogroups.com...
17239
Alan Hale
ahale15
Apr 6, 2011 8:24 pm
Dear Jakub, and all, ... I didn't determine it for the specific night in question, but in general for that instrument, it's around m_v ~15.5 (perhaps a little...
17240
Alan Hale
ahale15
Apr 6, 2011 8:43 pm
... I do hope John is wrong about this, but we'll have to see . . . The four-magnitude increase in brightness that C/2011 C1 exhibited between early March and...
17241
Bernd Häusler
stargazer_fr...
Apr 6, 2011 9:13 pm
Hello, since my last photometry of the comet on March, 29 with 18.09 mag, the magnitude meanwhile increased around 2 mag, now 16.22 mag. Image of April, 6...
17242
walcom77
Apr 6, 2011 9:56 pm
Dear All We have just updated our blog with image and info about the newly discovered comet C/2011 G1 (MCNAUGHT): http://bit.ly/gGERB9 Ciao, Ernesto Guido &...
Leonid, John, Giovanni, Alan, Jakub, and friends, Well ... after a somewhat "boring" first quarter of the year ( only some faints comets for the visual...
17244
chergen
Apr 6, 2011 11:04 pm
... I'd like to second John's statement. Based on CCD magnitude estimates by Artyom, Giovanni and myself, this comet is intrinsically faint. Unless the comet...
Your magnitude estimates were right on our values for April 6, at about m1=16.2, with m2=16.5, so very little difference between m1 and m2 via CCD. Clay _____ ...
