NGC 1931 (Sh2-237) is an open cluster emission and reflection nebula complex located in constellation Auriga and is referred to as a smaller M42 the Orion Nebula. Within the center of the nebula is a small cluster of four hot young stars resembling the Trapezium of M42. Commonly referred to as the Fly with its predator being IC 417. The NGC 1931 cluster is estimated to be 10 million years old. The nebula size is about 10 light years across and the distance from earth is estimated about 7000 light years.
| Location & Date |
Backyard, Abbott Observatory - Nov 28, 2008 Temp - Low 30's |
| Telescope | TMB 130SS Refractor, F/7 on a Losmandy G11, Prime Focus, Image scale 1.68 arcsec/pixel |
| Camera |
SBIG ST-2000XM w/CFW8, AO8 Astrodon Tru Balance Filters CCD temp -15°C |
| Exposure Times | (R) 13 x 10, (G) 6 x 10,(B) 11x 10 Minutes, Bin 1x1 |
| Other Information |
Image acquisition/focus/guiding/dither - CCD Autopilot V4 w/CCDSoft Focus - Moonlite Motorfocus w/FocusMax |
| Image Processing |
* Images Plus 3.75beta 2 - Calibration, Normalize, Grading, Alignment, Min/Max Average Combine, R/L Deconvolution, N/R, mild DDP * Adobe CS - Levels, Curves, Sharpening, Cropping, NR, JPEG conversion |
