M33 (Triangulum Galaxy) in Triangulum.

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    12" RC -LHaRGB 12" RC - Annotation map    
    Size: 2000 px Size: 2000 px    
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© Velimir Popov & Emil Ivanov 2013

M33 (The Triangulum Galaxy) is the member of our local group of galaxies. It is over 50000 light-years in diameter, the third largest in the Local Group of galaxies - only our own Milky Way and M31 (Andromeda Galaxy) are larger. The popular names of M33 include the Pinwheel Galaxy or Triangulum Galaxy. The spacious spiral arms of M33 are rich in star forming HII regions. M33 is a faint and extended galaxy with a small, almost starlike nucleus. The light haze consist of faint stars, which shines in the yellowish light. Dark dust lanes can be traces into the nucleus. Unlike many other large galaxies, such as the Milky Way and Andromeda, M33 does not have a supermassive black hole in its center. From the nucleus, spiral arms reach out through the disk, which are populated by young hot blueish stars. They have formed from reddish diffuse nebulae, and indicate activity of star formation. Some of the bluish star clouds and reddish H II regions (diffuse nebulae) have been assigned by own NGC or IC numbers. The brightest and most impressive of M33's HII regions is NGC 604. This massive HII region spans about 1500 light years. There are also a number of globular clusters in the spiral arms.

Image details:


Center of field RA 01:33:53 (h:m:s)
Center of field DE +30:39:48 (deg:m:s)
Size 33.8 x 34.7 (arcmin)
Pixel scale: 1.04 (arcsec/pixel)
Orientation: Up is 179 degrees E of N
Charts and image details obtained from Astrometry.net
Optic(s): RC 12" with Astro-Physics corrector @ f/5 (RC)
Mount: ASA DDM85 Premium
Camera: ATIK 4000 M
Filters: Astronomik HaLRGB filter set
Dates/Times: 3, 4, and 11.11.2012
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: Ha: 5x20 min, L: 7x10 min, R: 7x10 min, G: 7x10 min, B: 7x10 min
  Bin 1, Total Exposure Time - 380 min (6:20 hours)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013. All Rights Reserved
e-mail: info@irida-observatory.org
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