NGC 1955, NGC 1968 and more in Dorado

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16" DCA: HaLRGB 16" DCA: Annotated map 16" DCA: Ha 12" ASA: HaLRGB 12" ASA: Annotation map  
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© Velimir Popov & Emil Ivanov 2013
 

The region showing:

N51and N44 in Dorado: a massive complex that also includes NGC 1955, NGC 1968. These are the huge superbubbles N51D and N44, which contains the first ever extragalactic Herbig Haro object to have been discovered in 2005. N44 (right-down) is a large HII region in the LMC with the size of the "hole" about 250 light years across.

Objects: NGC 1929, NGC 1934, NGC 1935, NGC 1936, NGC 1937, NGC 1955, NGC 1968, NGC 1974, NGC 1991, NGC 2011, NGC 2014, NGC 2020, NGC 2021, IC 2126, IC 2128

The Large Magellanic Cloud (LMC) is actively producing new stars. Some of its star-forming regions can even be seen with the naked eye, for example, the famous Tarantula Nebula. However, there are other smaller - but no less intriguing - regions that telescopes can reveal in intricate detail.

The pink-tinged cloud on the right, NGC 2014, is a glowing cloud of mostly hydrogen gas. It contains a cluster of hot young stars. The energetic radiation from these new stars strips electrons from the atoms within the surrounding hydrogen gas, ionising it and producing a characteristic red glow.

In addition to this strong radiation, massive young stars also produce powerful stellar winds that eventually cause the gas around them to disperse and stream away. To the left of the main cluster, a single brilliant and very hot star seems to have started this process, creating a cavity that appears encircled by a bubble-like structure called NGC 2020. The distinctive blueish colour of this rather mysterious object is again created by radiation from the hot star - this time by ionising oxygen instead of hydrogen.

The strikingly different colours of NGC 2014 and NGC 2020 are the result of both the different chemical makeup of the surrounding gas and the temperatures of the stars that are causing the clouds to glow. The distances between the stars and the respective gas clouds also play a role.
(Info courtesy: ESO)

Object details

Right Ascension 05:26:12 (h:m:s)
Declination -67:29:54 (deg:m:s)
Distance ~ 160 000(ly)
Apparent Dimension 20' x 20' (arc min)

Image details

Annotation

ASA 12"

Center of field RA 05: 23:35 (h:m:s)
Center of field DE -67: 45:45 (deg:m:s)
Size 56.9 x 42.6 (arcmin)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is -1.62 degrees E of N

DCA 16"

Center of field RA 05:27:23 (h:m:s)
Center of field DE -67: 44:14 (deg:m:s)
Size 1.37 x 1.37 (deg)
Pixel scale: 1.23 (arcsec/pixel)
Orientation: Up is -179 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: 8x10min, R: 10x10min, G: 9x10min, B: 9x10min, Bin 1
  Total Exposure Time - 270 min (4:30 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: Ha: 6x15min, L: 5x10min, R: 5x10min, G: 5x10min, B: 5x10min, Bin 1
  Total Exposure Time - 290 min (4:50 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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