Was given some clear skies nearly immediately after finishing acquisition for my 3 panel horsehead mosaic. Although they were short nights due to interuptive clouds. I acquired 5hrs of data over 2 nights. To my surprise the data is very clean and not that noisy, Rosette is apparently quite a bright emission nebula! This was a fairly easy and straightforward image, so easy to get a nice result on this target!

Acquisition Details:

Scope: GSO 8" F/4, flocked, 2" moonlite, DIY AutoFocuser, DIY Secondary Dew Heater Coma Corrector: SkyWatcher Aplanatic/Quattro Camera: ZWO ASI 1600MMC PRO (Image scale ~1"/pixel) Mount: EQ6-R Guide Scope: ZWO 60mm Guide Cam: QHY5LIIC All ZWO LRGBSHO filters Taken on 26 and 27th december 2019. Subs & Integration times: Ha: 39x300s (3.25 hrs) Oiii: 23x300s (1.92 hrs) Grand Total: 5.2 hours All at unity gain, 21 offset, -15 degrees celsius Acquired with the NINA imaging suite. Guided with PHD2. Mount interface: EQMOD

Processing Details:

Aligned Oiii & Ha, cropped. ABE applied. Decon, TGV and MMT NR applied to Ha. HT stretch to both Ha and Oiii Linear fitted Oiii to the Ha. Used /u/dreamplease Pixel math HOO combination SCNR on green & Blue Several curve transformations to achieve desired colours Starnet to make starless Then with the standalone Ha, LHE and S curve for enhanced contrast. LRGB Combination with this enhanced Ha and the starless colour image. More curves to reacquire the desired colour and contrast. Star reduction using starnet mask and morphological selection Color Saturation over reds ACDNR to smooth up some subpixel grit S Curve on RGB/K S curve on blue channel
Date Created: 2019-12-26
Date Posted: 2019-12-31