Object  M100 & Companions Ngc4322/ 4328 & VCC636
Info

The Virgo cluster borders into the neighbouring constellation of Coma Berenices and is the nearest moderately rich galaxy cluster containing examples of almost every known kind. Three quite different types are represented here.                           The dominant galaxy is the face-on spiral M100, one of the finest spirals in this interesting group. The lack of symmetry in its brightest spiral arms suggests that M100 has been disturbed by gravitational interaction with its neighbours.        At the bottom of the image is NGC 4322,  a  so-called 'nucleated dwarf' elliptical galaxy, appearing to be interacting with M100. Dwarf galaxies are by far the commonest kind in rich clusters such as this, but nucleated examples are quite rare. The middle right galaxy, NGC 4328 is what is known as a lenticular galaxy. North is to the bottom of the page.

Date 4/ 4/ 05
Location BayTop Observatory- Streaky Bay South Australia
Instrument Vixen VC200L working @ f4.7 with Hm made focal reducer
Mount Vixen 'GPDX' controlled by a Mel Bartels Goto System
Camera (CCD) Starlight Xpress HX516 monochrome with Hm, made filter slider
Exposures L: 100' R: 30' G: 30' B:30' (5' sub exposures all unbinned)     Dark frames removed.
Guiding  Sky Watcher-f5 ST Refractor & a Meade LPI imager attached with main scope on a home made accessory plate.
Filters Astronomik Type 2   CL.RGB set
Notes/ Conditions

 Conditions- Seeing  relatively unsteady but dry. Transparency was poor to average. Object rose no more than aprox. 39 degrees max altitude to my north.