Sh2-82 - emission and reflection nebula in Sagitta

© Velimir Popov & Emil Ivanov 2016
Size: 2000 px
Sh2-82 (also designated Bernes 17, LBN 129, LBN 053.54+00.04, DG 159, Magakian 797) is a combination of emission and reflection nebula in the constellation Sagitta. Sh2-82 is ionized by the main sequence B0.5V star HD 231616. According to the most reliable estimates its distance is about 1100 parsecs (3590 light years), thus it appears to be near the Vul OB4 association. Within the cloud some of infrared radiation sources have been identified, including one, cataloged as IRAS 19282 + 1814, which coincides with the methanol masers, generated from a protostar deeply shrouded in gas. From the cloud also come some emissions in radio waves originating from small diameter sources, a sign that inside are taking place processes of star formation. Sh2-82 has been cataloged with the number 843 in the catalog of star-forming regions published by Avedisova in 2002. Due to similarities with the Cocoon and Trifid nebulae, Sh2-82 is called sometimes "Little Cocoon" or "Little Trifid"



Image details:


Center of field RA 19:30:26 (h:m:s)
Center of field DE +18:15:44 (deg:m:s)
Size 1.4 x 1.26 (deg)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is 179 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: 23 Aug. 2014
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details:

L:5x10min, 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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