Hi Trevor & All,
There is nothing by way of nebulosity per se within 10-odd degrees of M30 that I know of.
Pal 12 as PGC has noted is nearby but it is a GC -- that is just visible in 10" under a dark sky. It has a small distinctive triangular asterism of mag 11/12 stars just off it's southern edge that makes finding its location pretty easy.
I wonder if you might be refering to the "alleged nebula" near M2 in Aquarius (a nearby GC to M30) that is in the NGC catalogue as NGC 7088 and has become known as "Blaxendell's Unphotographable Nebula". It is said to be about 25 arc-mins north of M2
The visual discovery of this "nebula" by Blaxendall was included by Dryer in the NGC after Dryer himself apparently saw it too. There have been many "sightings" over the years -- some quite recent by amateur astronomers of good reputation. However there is absolutely no trace of it on any photographs.
You can read a bit about it here:
http://home.earthlink.net/~haggisizi.../invisible.htm
Harold Corwin's notes on the NGC/IC project are:
NGC 7088 does not exist, even though a least a dozen sightings have been
reported of it in the literature, including one by Dreyer in the NGC. The
nominal position, from Baxendell, is about half a degree north of M2 (NGC
7089), but there is nothing there but faint field stars.
Typical of the literature reports is one by Steve Coe in ``Deep Sky Journal
#2'' (Autumn 1992) on page 29: ``NGC 7088 is faint, large, and elongated 2X1
E-W. ... It is just a faint glow with some mottled structure and 6 stars
superimposed across the face ....'' Steve includes a sketch with M2 directly
to the south. But reference to the Sky Survey POSS1 prints and Siding Spring
IIIa-J films show nothing at all at Steve's place except very faint field
stars (there are not enough of them to lend even a hint of a cluster in the
field).
My feeling about this object is that it may have been a reflection of some
other object (perhaps even M2) within Baxendell's telescope or eyepiece, and
that later observations are illusions simply ``wished'' into existence (see
NGC 2529 and NGC 2531 for a discussion of two other such objects).
See:
http://www.ngcicproject.org/pubdb.htm
and search under NGC 7088.
I've never seen it. Several attempts with 'scopes up to 18". Nothing seen save a few faint stars in a pretty thinly-sprinkled field -- as noted by Corwin.
It is probably an illusion caused by a grouping of faint stars -- who knows.
Hope that is of some help. In the end to directly answer your initial question, there is nothing of a "nebulous nature" within many degrees of M30.
Best,
Les D
