NGC/IC Project Restoration Effort
(This is a very very beta version)
Location and Magnitude
Right Ascension: 13:37:7.3
Discoverer: Herschel J.
Year of discovery: 1828
Discovery aperture: 18.3
Summary description: eF, eL
NGC 5242 probably never existed. JH saw it only once, and seemed unsure
about its reality. His description reads, "eF, vL; fills the whole field.
Strongly suspected; yet a doubt remains." His declination is followed by a
double colon which further suggests a problem with the observation. However,
under his entry for NGC 4808, seen during the same sweep, he says, "Sky
perfectly clear." Also, his measured declination, though marked uncertain,
is appropriate for the sweep.
Since there are no galaxies in the area matching JH's description (all are too
small), nor are there any one hour preceding or following, or within two+-
degrees of the nominal declination, this may well be a visual illusion of some
sort, perhaps caused by scattered light in his telescope.