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IC_417_and_NGC_1931.jpg
The Spider and the Fly1372 viewsIC 417, aka the spider, located in the constellation Auriga is the bright emission nebula in the center of the image. The smaller emission and reflection nebula NGC 1931, aka the fly, is located to the right. In the upper left-hand corner is the emission nebula IC 410. Exposure was a total of 3 hr 10 min (38 X 5 min) with a Takahashi E-180 and modified Canon 40D @ ISO 800 (30 darks, 60 flats). Image aquisition with Images Plus 4.0; Calibration, alignment, and stacking in Images Plus 3.82b.
RGB_Lum_NonLinearCombination_final_Large.jpg
An Open Cluster and Nebula in the constellation Auriga624 viewsNGC 1931 is a relatively young open cluster surrounded by emission and reflection nebulosity (Sharpless 2-237) in the constellation Auriga. Faint red hydrogen emission can be see in the region surrounding the compact cluster/nebulosity. Sharpless 2-237 shows both red hydrogen emission and blue reflection nebulosity. Image was a total of 15 hours of exposure through a Takahashi CCA250 f/5 astrograph with a QSI683wsg camera @ -20 degrees C. (Astrodon Gen 2 filters) on a Paramount ME on the nights of 23, 30 Nov and 5 Dec 2016 and 13, 18, 19 Jan 2018 in Mayhill, NM (Lum 30 x 1200 sec; Red 5 x 1200 sec; Green 5 x 1200 sec; Blue 5 x 1200 sec; with corresponding Flats, Darks, and Bias). Processed in PixInsight 1.8.5.1353 Ripley (x64). Color calibration and RGB image stretch with PixInsight's Photometric Color Calibration and Arcsinh Stretch, respectively.
NGC1931TheFlyLuminance.jpg
An Open Cluster and Nebulous Region in Auriga517 viewsNGC 1931, sometimes called “the fly”, is a relatively young open cluster surrounded by a field of nebulosity located in the constellation Auriga. The open cluster is approximately 7000 light-years distant. The image was taken through a Astrodon luminance filter (Gen2) with a QSI683wsg CCD camera and a Takahashi CCA250 f/5 astrograph on a Paramount ME on the nights of 23, 30 November and 5 December 2016 in Mayhill, NM (30 x 1200 sec Lights @ -20 degrees C.; 18 darks; 128 bias, 128 flats). Processed in PixInsight 1.8.5.1353 Ripley (x64).
 
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