Messier 100

100 final

Object:   M100  (NGC 4321) Date:               2018 May 15
Type:  Spiral galaxy
Constellation:           Coma Berenices Time & altitude:         23.10 UT      44º
Catalogue data: Seeing (5 high):                               3/5
            R.A:                12h 19m Transparency (5 high):                   3/5
            Dec:                14º 25 Telescope:     0.5m f4.1  Dob.
            Magnitude     9.4 Eyepiece       8mm Ethos                x260
            Size (mins)    7 x 6 Filters:            None


Transparency has improved slightly. This galaxy has an oval halo. Hints of spiral arms were seen intermittently with AV, one each side of the core. After the event I note there are two 14th magnitude satellite galaxies in this field. I didn’t notice either, a pointer to the very average atmospheric conditions. Tried again on May 17 but the view was no better.