|Rektascenzija||21 : 40.4 (u:m)
|Deklinacija||-23 : 11 (sto:m)
|Razdalja||24.8 (*1000 sv.l.)
|Vizual. magnituda||7.2 (mag)
|Zorni kot||11.0 (loc min)
Globular cluster M30, at roughly 25,000 light years distance and about 70 light years across, has only about 12 known variables, and is approaching us at 164 km/sec. It is fairly dense and a fine object in even small scopes. The core of M30 exhibits an extremely dense stellar population, and has undergone a core collapse, similar to at least 20 other of the 147 globulars in the Milky Way Galaxy, including M15, M70, and possibly M62.
Cecilia Payne-Gaposchkin mentions that a dwarf nova had occurred in M30; another one has been detected in M5 and a third in NGC 6712.
M30 is less loved by Messier Marathoners, as it is often the last missed object
of an almost-complete
Messier Marathon, a tour for
viewing all Messier objects in one night (which is possible near the end of
March in moonless nights).