VdB 7, Vdb 9 a.o. in Cassiopeia

  Size: 2000 px      
© Velimir Popov & Emil Ivanov 2016
This image, showing the aria adjacent to VdB 8, includes the reflection nebulae VdB 7 and VdB 9 and also several dark nebulae (please see the annotated mouseover image just below this text). Vdb 7 lies in proximity to the spectral class A3 eclipsing variable star RZ Cassiopeiae, which heavily penalizes its observation. The nebula is located just to the south of this star. The illuminating star however is not RZ Cassiopeiae, but a much weaker star, of eleventh magnitude. Regarding VdB 9, its illuminating star is the fifth magnitude SU Cassiopeiae, a white-yellow dwarf Cepheid, placed at a distance of about 1,400 light-years from the Solar System.
 The image of VdB 7 and VdB 9 (right part of the image above) is reprocessed from raw data taken back in July 2012.


Image details:


Center of field RA 02:52:33 (h:m:s)
Center of field DE +69:22:04 (deg:m:s)
Size 1.74 x 1.2 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is -91 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: Jul. 2012
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L: 5x10, R:5x10 min, G:5x10 min, B:5x10 min, Bin 2, Total Exposure Time - 200 min. (3:20 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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