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Melotte 15 (IC1805) in H-Alpha, Christian Großmann
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Melotte 15 (IC1805) in H-Alpha

Getting plate-solving status, please wait...
Melotte 15 (IC1805) in H-Alpha, Christian Großmann
Powered byPixInsight

Melotte 15 (IC1805) in H-Alpha

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Description

The last nights we had clear skies after a long period of clouds. Although I had to work every early morning, I decided to use the telescope. I had to solve some last technical issues with my setup and managed to keep the scope working automatically the whole night(s). After some hints of nice users in the forum, I decided to play a bit with my exposure times. One night, I took a lot of images with an exposure time of 180 seconds. After stacking the images in DSS, I was not able to get a usable result. So I decided to go with an exposure time of 300 seconds instead. I also switched from gain 111 (unity gain on the ZWO 183MM) to 178. The results with the Ha filter were much better now. Because there was a full moon out, the contrast in a lot of the images was really poor. So again I decided to go for additional images in Ha during the third night. Yesterday, I purchased a license of PixInsight and did some experiments today.

I managed to stack 83 images of 300s each, that were captured on the 30th and 31st of march 2021. Because I was not able to shoot flats, I had to use the DBE-Tool to even out the exposure. So far, this first attempt was in my opinion really successful. Although it is just a monochrome image, I am quite happy with it. As soon as the sky is clear again, i will capture the heart of the heart nebula in SII and if the moon is not out, I also go for OIII to get a colored version.

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Melotte 15 (IC1805) in H-Alpha, Christian Großmann

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