VdB 47 - reflection nebula in Taurus

  Size: 2000 px      
© Velimir Popov & Emil Ivanov 2016

VdB 47 is a reflection nebula associated with a visible emission in the constellation Taurus. It is a cloud of gas that surrounds the star HD 37387, an orange supergiant of spectral class K1Ib placed at a distance of 6500 light-years, at the inner edge of the Perseus Arm. The nebula presents a markedly orange color due to the radiation of this star and has an effective temperature of 4500 Kelvin. The cloud may be associated with star-forming region which also includes the maser DG 68 and the source IRAS 05363 + 2317, along with some radio wave sources. Some astronomers identify VdB 47 with Sh2-243. In fact, the given coordinates in the Sharpless catalogue place Sh2-243 almost at the same place. But, reffering Galaxymap: "there is no visible nebulosity on this image, no known ionising stars in this direction, nor has anything been detected at radio frequencies. It is not clear whether this object actually exists". The same applies more or less to LBN 830. But some further research suggests, that probably (despite some minor differences in the coordinates, please see mouseover) VdB 47 = Sh2-243 = LBN 830.

Image details:


Center of field RA 05:39:14 (h:m:s)
Center of field DE +23:18:04 (deg:m:s)
Size 1.92 x 1.29 (deg)
Pixel scale: 2.99 (arcsec/pixel)
Orientation: Up is -75.4 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: 21 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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