Messier 17, Messier 18, IC 4701, IC 4706, IC 4707, VdB 120, VdB 121 a.o. in Sagittarius
 
  Size: 2000 px      
 
© Velimir Popov & Emil Ivanov 2017

This image shows an area of about 2° x 1.3° in the constellation Sagittarius. Several objects can be found here (see annotation mouseover). Among them are the famous Swan (omega) nebula, also known as Messier 17 or NGC 6618; the open cluster Messier 18, and two tiny reflection nebulae VdB 120 and VdB 121.

Image details:

Annotation
Center of field RA 18:18:57 (h:m:s)
Center of field DE -16:43:37 (deg:m:s)
Size 1.95 x 1.3 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 69.2 degrees E of N
Charts and image details obtained from Astrometry.net
Optic(s): ASA 12" Astrograph @ f/3.6 (Newton)
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters
Dates/Times: 21, 22. Jul. 2017
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L:7x10min., R:5x10 min, G:6x10 min, B:5x10 min, Bin 2, Total Exposure Time - 230 min (3h 50min).
More details: Dark and flat frames reduction
Processing: PixInsight / PS
 
Copyright: Velimir Popov and Emil Ivanov 2013 - 2017. All Rights Reserved
 
e-mail: info@irida-observatory.org
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