RCW 75

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    16" DCA: HaLRGB 16" DCA: LRGB 16" DCA: Ha  
    Size: 2000 px Size: 2000 px Size: 2000 px  
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© Velimir Popov & Emil Ivanov 2014

RCW 75 (also known as Gum 48a) is an emission nebula (a large H II region) in the constellation Centaurus. It is located in the southern part of the constellation,midway between the bright stars Hadar and Acrux. The distance to RCW 75 is estimated to be not less than 2,000 parsecs (6,520 light years); This complex appears physically associated with the open cluster Stock 16. The nebulosity would also associated with the reflection nebula vdBH 60, whose four components, indicated with the letters a through d, seem associated with different clusters of infrared radiation sources at distances between 2100 and 2400 parsecs. In the vicinity of the nebula is also the vast nebulous complex Ced 122, visible just to the south, which stretches for some degrees.

Image details


Center of field RA 13:19:43 (h:m:s)
Center of field DE -62:35:46 (deg:m:s)
Size 1.4 x 1.4 (deg)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is 179 degrees E of N
Charts and image details obtained from Astrometry.net
Optic(s): 16" f3,75 Dream Corrected Astrograph (DCA)
Mount: Astelco NTM-500 direct drive mount
Camera: Apogee Alta U-16M CCD camera
Filters: Lum, Red, Green, Blue, Ha, OIII and SII Astrodon
Dates/Times: 26 August 2014
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details: Ha: 4x15min, L: 4x10min, R: 4x10min, G: 4x10min, B: 4x10min, Bin 1
  Total Exposure Time - 220 min (3:40 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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