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VdB 157 - reflection nebula in Cepheus |
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Size: 2000 px |
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| © 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.
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Image details:
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| 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 |
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| 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 |
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| Copyright: Velimir Popov and Emil Ivanov 2013 - 2017. All Rights Reserved |
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| e-mail: info@irida-observatory.org |
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