Messier 14 (also known as M14 or NGC 6402) is a globular cluster of stars in the constellation Ophiuchus. It was discovered by Charles Messier in 1764. At a distance of about 30,000 light years, M14 is about 100 light years across, and contains several hundred thousand stars.
This imaging run was mainly a test of two different approaches to guiding. I planned to get more subframes, but after the meridian flip, the USB connection to the guide camera stopped working, so I called it a night, and shut down. (I have since purchased a USB extender that promises to eliminate the problem of failure-prone active extender cables.)
| Exposure |
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| Processing |
• With PixInsight: ☞ Calibrate, star-align, and integrate subframes ☞ Background neutralization ☞ Histogram transformation • Noise reduction with Topaz DeNoise AI • Final tweaking and sizing in Photoshop CS6 |
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| Date and Location |
• July 15, 2021 • 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 • Guided with a ZWO ASI-120M camera on a 60mm f/5 scope • Imaging and autoguiding with MaxIm DL 6.20 • Automated image acquisition with ACP Observatory Control |
Updated May 23, 2023