M 100 - Spiral Galaxy M100 (NGC 4321), type Sc, in Coma Berenices

RA 12 : 22.9 (h:m); Declination +15 : 49 (deg:m); Distance 60 million light years;
Visual Brightness 9.3 (mag) ; Apparent Dimension 7x6 (arc min).

M100 is one of the brightest member galaxies of the Virgo Cluster of galaxies.

M100 is a spiral galaxy, like our Milky Way, and tilted nearly face-on as seen from earth. It is among the first spirals that have been discovered, and listed by Lord Rosse as one of 14 "spiral nebulae" discovered to 1850.

Source and more: SEDS

M100 [Spiral Galaxy] with NGC4328 and VCC636
April 2, 2006 20:37 - 20:48 UT.
Imaged with LX200 10-inch f/10 telescope with 0.33 Focal Reducer operating at f/4.06 [focal length 1015mm], Vesta Pro-SC3a b/w RAW mode, Baader Infra Red Blocking Filter.
61 autoguided exposures of 20 seconds.

M100 [Spiral Galaxy] with NGC4322, NGC4328 and VCC636
April 10, 2005 23:10 - 23:17 UT.
Imaging: TAL-2M 6-inch f/8 focal reducer operating at f/4.6 [focal length 690mm], Vesta SC3a b/w RAW webcam, Baader Infra Red Blocking Filter, 12 unguided exposures of 12 seconds.