NGC 4945 - spiral galaxy, type SBc (Seyfert 2), in Centaurus

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16" DCA: LRGB Annotated map 16" DCA: 100% crop 12" ASA: LRGB 12" ASA: 100% crop  

Size: 2000 px

Size: 2000 px Size: 2000px Size: 2000px Size: 2000px  
 
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© Velimir Popov & Emil Ivanov 2013
 

NGC 4945 is a relatively nearby spiral galaxy, very similar to the Milky Way Galaxy. About 13 million light-years distant, NGC 4945 is almost the size of our own Milky Way Galaxy. This remarkable spiral galaxy seen almost edge-on, and the spiral structure is chaotic and difficult to discern. In part this is because the galaxy is itself extremely dusty, and it is seen through dust in the Milky Way. These effects together account for its yellowish hue, though patches of bluish stars can be seen. The dust in NGC 4945 absorbs most of the visible light, especially the blue light from the numerous bright stars known present within the galaxy.

In NGC 4945 , observations at X-ray and infrared wavelengths have found evidence of very energetic processes in the nucleus. NGC 4945 belongs to the Centaurus group of galaxies.

Object details

Right Ascension 13:05:26 (h:m:s)
Declination −49:27:46 (deg:m:s)
Distance ~ 500 (ly)
Apparent Dimension 20.41 x 4.365 (arc min)

Image details

Annotation

ASA 12"

Center of field RA 13:05:06 (h:m:s)
Center of field DE -49:25:18 (deg:m:s)
Size 56.8 x 42.8 (arcmin)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is -1.91 degrees E of N

DCA 16"

Center of field RA 13:05:26 (h:m:s)
Center of field DE -49:27:23 (deg:m:s)
Size 1.37 x 1.37 (deg)
Pixel scale: 1.23 (arcsec/pixel)
Orientation: Up is -178 degrees E of N
Charts and image details obtained from Astrometry.net
ASA 12"
Optic(s): ASA 12" f 3,6 Astrograph (ASA)
Mount: ASA DDM85
Camera: FLI MicroLine 8300 CCD camera
Filters: Lum, Red, Green, Blue, Ha, OIII and SII Astrodon
Dates/Times: From 3 to17 of May 2013
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details: L: 11x10min, R: 8x10min, G: 8x10min, B: 8x10min, Bin 1
  Total Exposure Time - 350 min (5:50 hours)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
DCA 16"
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: From 3 to17 of May 2013
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details: L: 6x10min, R: 4x10min, G: 4x10min, B: 4x10min, Bin 1
  Total Exposure Time - 180 min (3:00 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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