Antilhue - Chile

Messier 100
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Image Data

Designation M 100,  NGC 4321
Object type Sc type spiral galaxy
Coordinates 12h23m,  + 15°49'
Constellation Coma Berenices (Com)
Description M100, although situated in constellation Coma Berenices, is one of the brightest spiral members of the Virgo Cluster of galaxies.   Unlike the nearby spiral M99 , it  rotates counter clockwise.  M100 floats at a distance of 60 million light years from earth.   It is suspected that much of its mass is situated in low density exterior regions that do not readily show up in photographs.  The rightmost of the three lenticular galaxies  towards the bottom and right is NGC 4328 (mag 14.3).  It shows a faint jet.

There is also a wide field image taken with a 6" refractor telescope.

Exposure LRGB 120:60:60:60 min @ -15°C, RGB binned 2x2
Camera SBIG ST-10XE selfguided,  CFW-8, Astrodon Tru-Balance LRGB Filterset
Optics RCOS 14.5" Ritchey-Chrétien @ f/9
Mount Astro-Physics AP1200GTO
Software MaxIm DL/CCD,  Sigma Pre Beta 11, Registar, Adobe Photoshop CS
Location - Date - Time San Esteban (Chile) - 21Mar2004 - 06:00 UTC
Conditions Transparency 6,  Seeing 5, Temperature +15°C