VdB 140 - reflection nebula in Cepheus
 
  Size: 2000 px      
 
© Velimir Popov & Emil Ivanov 2017

VdB 140 is a reflection nebula in the constellation Cepheus. Located about one and a half degree SW from Sh2-129 and OU4 (see the annotated mouseover below), it is illumitated from the star V421 Cep, a blue giant of sixth magnitude. The distance is estimated at about 2500 light-years.

Image details:

Annotation
Center of field RA 21:17:20 (h:m:s)
Center of field DE +58:37:16 (deg:m:s)
Size 1.93 x 1.29 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 102 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: 22, 23. Feb. 2017
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: R:8x10 min, G:8x10 min, B:8x10 min, Bin 2, Total Exposure Time - 240 min. (4:00 h)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
 
Copyright: Velimir Popov and Emil Ivanov 2013 - 2016. All Rights Reserved
 
e-mail: info@irida-observatory.org
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