NGC 2023, the Horsehead Nebula (Barnard 33) is a small dark nebula in the constellation Orion. The nebula is located just to the south of Alnitak, the easternmost star of Orion's Belt. It appears within the southern region of the dense dust cloud known as Lynds 1630, along the edge of the much larger, active star-forming H II region called IC 434. The Horsehead Nebula is approximately 1,375 light-years from Earth. The Flame Nebula (NGC 2024) is an emission nebula about 900 to 1,500 light-years away.
| Exposure |
8@1200 sec (2 hours and 40 minutes) |
| ISO |
800 |
| Camera |
Nikon Z7 [8856 x 5504] |
| Optics |
Skywatcher Esprit 120mm Refractor, 840 mm focal length |
| Filter |
Radian Triad Ultra Quad-Band Narrowband Filter |
| Guiding |
Phd2 using a ZWO 224MC on an Orion 60x240mm Guide scope |
| Controller |
Images taken using Kstars on an Odroid-N2 (Raspberry Pi clone) |
| Location |
Lower Sackville, Nova Scotia. |
| Date |
2021-02-26 |
| PixInsight Processing |
| WeightedBatchPreprocessing Script |
| Dynamic Crop |
| Automatic Background Extractor |
| ColourCalibration (both saturation and hue) |
| MultiscaleLinearTransform |
| HistogramTransform |
| CurvesTransformation |
|
| Further tweaking for colour in Lightroom |
