NOTE: Contributors of comet magnitudes for inclusion on these web pages need to also include full information for ICQ publication and archiving! Observations from first-time (and occasional) contributors of comet magnitudes will generally not be considered unless they are accompanied by such necessary additional details.
Contributors of such observations for this Web site and for
CBAT publications should use the
format below --- but send data in chronological order (not
in reverse chronological order, as given on the CBAT/ICQ magnitudes webpage) and
use carriage-returns for any data beyond column 80 -- which is the form
used for potential IAUC-published data (we have a program to automatically
convert observations from IAUC-format chronological order into
reverse-chronological order for the postings below). Please put each
single observation on a line by itself, beginning with the month on
each and every line (to avoid errors in observations becoming separated).
Use month abbreviations (or full spellings) exactly as given on
the ICQ magnitudes webpage.
Send observations for IAUCs and the ICQ/CBAT Web page to
In general, we include data below only by experienced observers who
also contribute full details in ICQ format (magnitude method, comparison-star
reference, coma diameter, DC, etc.). Data not contributed in the format
below will not be posted here.
[UT to 0.01 day, total visual mag., coma diameter (observer, observing site, instrument);]
Examples (note that month should always be given, unlike what appears to the reader on the actual comet-magnitudes webpage listings; below is how to actually contribute an observation):
COMET 17P/HOLMES Total-magnitude and coma-diameter estimates: Nov. 15.23, 3.5, -- (F. Gobet, Cestat, France, naked eye); Nov. 15.49, 3.2, -- (R. O. Wheeler, Edmond, OK, U.S.A., naked eye); Nov. 15.52, 3.3, 37' (S. Yoshida, Kanagawa, Japan, naked eye); Nov. 15.72, 2.8, -- (K. Cernis, Vilnius, Lithuania, naked eye); Nov. 15.74, 3.5, 15' (V. M. Ivanov, Saratov, Russia, naked eye); Comet 191P/McNaught Total-magnitude and coma-diameter estimates: Oct. 18.00, 15.7, +0'.4 (A. Baransky, Lisnyky, Ukraine, 0.70-m reflector + CCD); Nov. 17.11, 14.0, 0'.4 (J. J. Gonzalez, Leon, Spain, 0.20-m reflector);
Give last (family) name of observer, preceded by first- and middle-name initials (not full names). Observing site should be a geographical feature (city, town, mountain, valley, near a certain town, etc.), not an observatory name. Instruments should be given as on ICQ comet-magnitudes webpage, to either the nearest 0.01 m or to the nearest 1 cm in aperture (no magnification, no f/-ratio). Use periods (.), not commas (,) for decimal points. Both below and on the IAU Circulars, 2-letter standard postal abbreviations are used for states in the USA and for provinces in Canada; the abbreviations are also available here.
Note that contributors from non-English-speaking countries using alphabets that employ diacritic marks (accents, umlauts, etc.) in the names of observers and/or places need to specify what marks are needed; do NOT use special control characters, as these frequently do not survive e-mail (electronic) transmission. Use a backslash (\) and then give the diacritic mark in the spaces immediately preceding the letter; for example, the French word "echelle" uses an acute accent (aigu) over the first "e", so this should be written thus: \'echelle. Likewise, use \" for a German umlaut, \^ for a circumflex, \~ for a tilde, \` for a grave accent, \v# for a hacek (where # is a blank space), \c# for a cedilla (where # is a blank space), \H\ for a Hungarian umlaut, and \ae, \o, and \aa for the final three Norwegian letters. More complete information is available at http://www.cfa.harvard.edu/iau/NonEnglish.html.
ICQ contributors need to supply more information; when reporting data, include magnitude method, comparison-star source, coma diameter (in arc minutes), instrument used for making the estimate, name, and address (while all this information is not included below, it is included in the published tabulated data in the ICQ).