Imaging telescopes or lenses: Planewave CDK24
Imaging cameras: ZWO ASI6200MM Pro
Mounts: Planewave L600
Guiding cameras: Starlight Xpress Ultrastar
Software: PixInsight 1.8 · Sequence Generator Pro · Photoshop CS3 · Planewave PWI4 · Planewave PWI3 · Maxim DL6 · Adobe Photoshop CC 2014
Filters: Astrodon 50mm B · Astrodon 50mm R · Astrodon 50mm L · Astrodon 50 mm G
Accessory: FLI CFW-5-7 · Hedrick Focuser · Planewave Delta-T · Planewave EFA
Dates:Dec. 15, 2020 , Dec. 16, 2020 , Jan. 7, 2021 , Jan. 8, 2021
Frames:
Astrodon 50 mm G: 8x900" (gain: 0.00) -10C bin 1x1
Astrodon 50mm B: 8x900" (gain: 0.00) -10C bin 1x1
Astrodon 50mm L: 28x900" (gain: 0.00) -10C bin 1x1
Astrodon 50mm R: 12x900" (gain: 0.00) -10C bin 1x1
Integration: 14.0 hours
Darks: ~20
Flats: ~80
Flat darks: ~80
Bias: ~20
Avg. Moon age: 12.66 days
Avg. Moon phase: 17.50%
Mean SQM: 21.20
Mean FWHM: 2.10
Astrometry.net job: 4162981
RA center: 5h 39' 21"
DEC center: +23° 17' 26"
Pixel scale: 0.196 arcsec/pixel
Orientation: 0.642 degrees
Field radius: 0.307 degrees
Resolution: 9356x6342
Locations: KG Observatory, Julian, CA, United States
Data source: Backyard
I started collecting color for this faint reflection nebula during a few December nights of decent seeing. I was then lucky to see some clearings during January for the Luminance.
"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. From 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 VdB 47 = SH2-243 = LBN 830."
Comments