Messier 75

75 final

Object:   M75 (NGC 6864) Date:               2018 September 13
Type:  Globular cluster
Constellation:           Sagittarius Time & altitude:          20.15 UT    17º
Catalogue data: Seeing (5 high):                               3/5
            R.A:                20h 06m Transparency (5 high):                   3/5
            Dec:                -21º 55 Telescope:     0.5m f4.1  Dob.
            Magnitude     8.66 Eyepiece       8mm Ethos                x260
            Size (mins)    6 Filters:            None


An easy star hop to this one thanks to nearby Mars! The visible diameter is only about 2 arcmins, nowhere near the catalogue size. The core is about one-third of the visible diameter. The cluster is not resolved, but the halo looks very grainy.