This article is within the scope of WikiProject Solar System, a collaborative effort to improve the coverage of the Solar System on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
I cannot find any images of Lexell's Comet, though Messier may have done a drawing - I've added an image of 17P/Holmes as it closely resembles the descriptions of Lexell's Comet, just to give readers an indication. —Preceding unsigned comment added by Svejk74 (talk • contribs) November 21, 2008
Such appearance of 17P was due to very rare and unusual outburst, but D/1770 L1 appearance was accounted for close Earth fly-by (0.0146 AU). 17P appearance was very unusual, and it will be very incredible if any other comet will have such appearance. I think, comparison of D/1770 L1 with 17P must be deleted. — Chesnok (talk) 09:12, 21 December 2008 (UTC)
Well, the descriptions of D/1770 L1 all appear to indicate a very large coma with little or no tail - I still feel this is close to the appearance of 17P/Holmes during outburst.
I suppose a comparable photographed comet D/1770 L1 might be Comet IRAS-Araki-Alcock, but I can't seem to find any copyright-free images (other than the IRAS ones, which are not very helpful). Svejk74 (talk) 10:28, 21 December 2008 (UTC)
17P Has very sharp coma edges like no other comets. Note the differences between 17P and C/1983 H1: