M12 - Globular Cluster in Ophiuchus
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M12 was discovered by Charles Messier in 1764. He described it as "a nebula without stars." William Hershel was the first to resolve the cluster into stars in 1783. Globular clusters reside in the halo around most galaxies. They contain some of the oldest known stars. |
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| Telescope: | Explore Scientific ED152 |
| Camera: | Modified Canon 650D; Raw capture; ISO 1600 |
| Mount: | Losmandy G-11 guided ONAG and Orion SSAG |
| Exposures: | 9 @ 5min. |
| Processing: | Images were focused using the camera's live view. Frames were calibrated, aligned and combined in ImagesPlus. The composite image was adjusted in Photoshop. Topaz DeNoise was applied. |
| Notes: | Taken on 6/28/13 from my backyard observatory in southeastern Minnesota; Temp = 65F; Humidity = 70% |
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