Draft talk:List of largest galaxies

This redirect is within the scope of WikiProject Astronomy, which collaborates on articles related to Astronomy on Wikipedia.AstronomyWikipedia:WikiProject AstronomyTemplate:WikiProject AstronomyAstronomy

Lists

This redirect is within the scope of WikiProject Lists, an attempt to structure and organize all list pages on Wikipedia. If you wish to help, please visit the project page, where you can join the project and/or contribute to the discussion.ListsWikipedia:WikiProject ListsTemplate:WikiProject ListsList

Flagged uncertain diameter

UGC 568: diameter applied based on a measurement on 2MASS and a distance of 1,758 Mpc which is way out of the redshift values, a calculated mean distance by NED. The large distance may be due to a measurement by the SDSS Supernova Survey (see here) where a distance was at 2,540 Mpc (8.2 billion light years) using supernova SDSS-II SN 10649, which what makes it weird is that the redshift of the supernova is at 0.04571, equivalent to 183 Mpc.

I don't know how they got that, but it gives the galaxy an absurdly large diameter (~780 kpc) far larger than others in the list. A modest calculation using the provided scale (893 pc/arcsec on Virgo + Great Attractor + Shapley) and the major axis in K_S 2MASS total of 91.40 arcsec gives just 81.6 kpc, about 266,000 light years. Putting this down here as a flagged galaxy. SkyFlubbler (talk) 02:13, 9 July 2022 (UTC)[reply]