Antilhue - Chile

Messier 99
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Image Data

Designation M 99, NGC 4254
Object type Sc type spiral galaxy
Coordinates 12h19m,  + 14°25'
Constellation Coma Berenices (Com)
Description M99, although situated in constellation Coma Berenices, is one of the bright spiral members of the Virgo Cluster of galaxies. It  rotates clockwise (unlike the nearby spiral M100) and is unusually asymmetric. At 60 million light years, it is moving through the Virgo Cluster with a high proper (or peculiar) velocity of at least about 1200 km/sec, in a direction pointing away from us.  M99 was the second nebula, or galaxy, to be recognized as a spiral, by Lord Rosse in spring 1846, about one year after his first discovery of a spiral, M51, in spring 1845.
Exposure LRGB 105:40:40:40 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) - 18Mar2004 - 06:00 UTC
Conditions Transparency 6,  Seeing 4-5, Temperature +14°C