NGC 2403 (also known as Caldwell 7) is a spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 group, and is about eight million light years away from Earth. The galaxy is 50,000 light years in diameter, half the size of our Milky Way galaxy.
| Exposure |
• 12 hours (72 X 10 minutes @ -20°C)
☞ 2021: 7.9 hours (47 subs) ☞ 2021: 4.2 hours (25 subs) • Dusk flats • Camera position angle: 0° |
| Processing |
• With PixInsight: ☞ Calibrate, star-align, and integrate subframes ☞ Background neutralization ☞ Histogram transformation ☞ Curve transformation ☞ Process for high-dynamic range • Noise reduction with Topaz DeNoise AI • Final tweaking and sizing in Photoshop CS6 |
| Date and Location |
• 2021: Mar. 7 & 8 • 2023: Mar. 20 • Louisa County, Virginia, USA |
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Equipment |
• TMB-130SS APO refractor @ f/7 on an A-P 1200 mount • ZWO ASI-1600MC Pro color camera • 2021: Guided with an ST-402 camera on a 60mm f/5 scope • 2023: Guided with a ZWO ASI-120M camera on the same scope • Imaging and autoguiding with MaxIm DL 6.20 • Automated image acquisition with ACP Observatory Control |
Updated May 23, 2023