Quote:
Originally Posted by Ric
Hi OBMY, I usually get my magnitudes through the Star Atlas Pro updater of comet data which comes from the IAU minor planetary centre.
At the moment they are listing McNaught as m = 8.98 and Tuttle as m = 7.96
Which Ephemeris do you use, I think it would be interesting to compare some magnitudes.
Cheers
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This has been puzzling me for a while
- I use Star Atlas Pro as well as Cartes du Ciel and from what I can see they use the same source for their comet data:
http://cfa-www.harvard.edu/iau/Ephem.../Soft00Cmt.txt
Yet SAP sometimes comes up with 'Estimated Visual Magnitude' substantially different from 'magnitude' in CdC... for C/2006 Q1 McNaught SAP mag = 8.98 and CdC mag = 11.9 as we speak.
Any ideas how come?
