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alexbb

Orion belt, Flame, Horsey and the Great Orion nebula - Ha mosaic

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It turns out I can not acquire more data until this challenge ends.

I present you therefore what I have until now. It's a 5 panels mosaic in Hydrogen alpha. 3 panels in portrait mode, at the top. And 2 in landscape mode, at the bottom. Each panel is made by 30-31 subs of 300s and for the Orion nebula core I have a few 15s subs.

All subs are taken with the ZWO ASI 1600 MMC, cooled to -15C, and 139gain. The lens is a Canon 300 F4 L with a lot of distortions caused by the IS element. Compared to the images I was taking on other targets until Orion rose enough, the focus was good since the beginning and remained ok during the nights.

Mount: AZ-EQ5. Guiding with a 200mm lens.

Software used: APT and PHD for acquisition; DSS, APP, Registar, StarTools and GIMP for processing.

I plan to acquire 4 more Ha panels in landscape mode to cover the same area to increase the SNR and then to move to O3 and LRGB. A lot of work this winter.

Link with wip: http://www.astrobin.com/317154/C/

Thanks and clear skies,

Alex

IC434-M42-F290-2017-10-20-Ha_p02_crop.jpg

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