NGC 246 - planetary nebula in Cetus

© Velimir Popov & Emil Ivanov 2016
Size: 2000 px

NGC 246, known as the Skull Nebula, is a planetary nebula in the constellation Cetus. It is situated about 1,600 light-years away from Earth. The nebula's central star is the 12th magnitude white dwarf HIP 3678. Several galaxies could be spotted on this image (for the designations see the mousover annotation). The biggest and the best studied of them is NGC 255. The core of the galaxy is inactive; emission in the Hα line of neutral hydrogen is found in the perinuclear region, but not in the nucleus itself. Below is a highly magnified crop of the Skull Nebula - NGC 246:

Image details:


Center of field RA 00:47:05 (h:m:s)
Center of field DE -11:51:39 (deg:m:s)
Size 1.13 x 1.03 (deg)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is -0.844 degrees E of N
Charts and image details obtained from
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 Astrodon
Dates/Times: 25 Aug. 2014
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details:

L5x10min, R:4x10min, G:4x10min, B:4x10min, Bin 1 Total Exposure Time 170 min.

More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2016. All Rights Reserved
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