VdB 48, IC 426 - reflection nebulae in Orion

  Size: 2000 px      
© Velimir Popov & Emil Ivanov 2016

This image covers a part of the constellation Orion, just a few arcminutes north - northwest from the 1.7 mag. star Alnilam (ε Orionis). Centered on the reflection nebula VdB 48, the image shows some other reflection nebulae. Among them is IC 426 (also catalogued as Magakian 112, Ced 55j, DG 61, LBN 203.76-16.35, LBN 921, or V1130 Ori). VdB 48 looks like an elongated cloud in the east-west direction overlapping two stars of spectral type B aligned in the same direction, which give an intense bluish color to the nebula. These stars are HD 37370 and HD 37371. The distance of them, derived from the determination of the parallax, is about 740 light-years, which places them in the Alnilam region, which could well compete with the other stars in lighting the gas of the nebula. There is another object on this image (please see the annotated mouseover). It looks like a planetary nebula, partially covered by the VdB 48. Although this object is clearly seen on DSS plates (see the image below), we couldn't find it catalogued in any catalogue.

Image details:


Center of field RA 05:38:10 (h:m:s)
Center of field DE -00:10:02 (deg:m:s)
Size 1.93 x 1.28 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is 104 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: 24,25 Dec. 2016
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L: 6x10, R:6x10 min, G:6x10 min, B:6x10 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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