Antilhue - Chile

M 100 + NGC 4312
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Image Data

Designation M 100 (also NGC 4321 - top), NGC 4312 (bottom)
Constellation Coma Berenices (Com)
Description The face-on spiral Messier 100 dominates this field full of  Virgo group background galaxies. Many pink starforming regions dot its blueish spiral arms. The Hubble Space Telescope was able to resolve Cepheid variables in M100 which led to an accurate distance measurement of 56 million lightyears. On the left (east) of M100 is the mag 14.3 lenticular galaxy NGC 4328: a diminute, reddish jet can just be seen emanating from its eastern side. The spiral galaxy at bottom center is NGC 4312.  North is up in this approx. 30 arcmin wide field.

Look here for a close-up image of M 100.

Exposure LRGB 60:36:36:36 min @ -15C, all 1x1
Camera SBIG ST-10XE selfguided,  CFW-8,   SBIG (CS) LRGB Filterset
Optics Astro-Physics AP155EDFS @ f/7.2 (prime focus)
Mount Astro-Physics AP1200GTO
Software MaxIm DL/CCD,  Sigma Beta 10, Adobe Photoshop 6.0
Location - Date - Time San Esteban (Chile) - 07May2003 - 02:00 UTC
Conditions Transparency 5,  Seeing 6, Temperature +15C, high cloud passing through