VdB 157 - reflection nebula in Cepheus

  Size: 2000 px      
© Velimir Popov & Emil Ivanov 2017

VdB 157 is a reflection nebula in the constellation Cepheus. It is a cloud of gas that extends around the star HD 217903 of spectral type B9V, a blue-white main sequence star located in the region Cepheus R2. From its parallax, equal to 2.72 is deduced a distance of about 368 parsecs (1200 light-years). The cloud consists of cold dust located away from the surface of the star, and emit infrared radiation, captured by IRAS.

Image details:


Center of field RA 23:02:17 (h:m:s)
Center of field DE +72:43:32 (deg:m:s)
Size 50.6 x 35.6 (arcmin)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 100 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: 27, 28. Jan. 2017
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: R:6x10 min, G:6x10 min, B:6x10 min, Bin 2, Total Exposure Time - 180 min. (3:00 h)
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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