VdB 156 - reflection nebula in Andromeda and Lacerta

  Size: 2000 px Size: 4000 px    
© Velimir Popov & Emil Ivanov 2016

VdB 156 (sometimes called o Andromedae nebula) is a big reflection nebula visible in the constellation Andromeda. It is situated in the north-west of the constellation, and is formed by a large system of gaseous nuclei surrounding the star ο Andromedae. ο Andromedae is a blue giant with spectral class B6III and strong emission at wavelengths of hydrogen (classified as a star Be), with a magnitude of 3.63. Estimates of its distance-based parallax indicates a distance of around 212 parsecs (791 light-years). The environment is particularly rich in partially ionized gas and illuminated dust , given the presence of Lacerta OB1 association. The different parts of VdB 156 (known as VdB 156 a - trough d) are also catalogued in Lynds Catalogue of bright nebulae (see the annotated mauseover).

Image details:


Center of field RA 23:01:50 (h:m:s)
Center of field DE +42:21:33 (deg:m:s)
Size 5.28 x 3.5 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 109 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: 2, 3, 25, 26, 27 Jan. 2017
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: R:3x10 min, G:3x10 min, B:3x10 min, Bin 2, Total Exposure Time - 810 min. (13:30 h) - nine panel mosaic
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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