3341 708 127 63 4608 3456 spot English author name string: C messier URL: https://commons.wikimedia.org/wiki/user:C_messier Wikimedia username: C messier
http://messier.seds.org/xtra/
history/m-m31_42.html (accessed 30 August
2016); see also http://messier.seds.org/m/m042.
html and http://messier.seds.org/