Repository navigation
Linear stack of the Rosette Nebula (NGC 2244) from a DWARF Mini, shared for anyone who wants to process it their own way.
Acquisition: DWARF Mini (30 mm, 150 mm focal length), EQ mode, built-in duo-band filter (Ha + OIII), gain 80. 2-panel mosaic, 1415 x 60 s over 10 nights (25 Sep to 13 Oct 2026), 23.6 h total. City balcony in Dnipro, Ukraine, Bortle ~6-7.
Done: stacked in Siril from all raw subs (mean, winsorized sigma clipping, FWHM weighting), two panels joined, zero borders cropped (1878 x 1919 px).
Not done: no gradient removal, no colour calibration, no stretch, no noise reduction, no star removal. The image is linear and looks almost black until stretched. Red is mostly Ha, green mostly OIII.
Files: the same data as a 32-bit float TIFF and a 32-bit float FITS, plus README.txt.
Terms: free to process for personal use. If you post your version, please credit "Data: Kostia Tepliy / Nebo Blyzhche (t.me/nebo_blyzhche)". No commercial use.
My versions: https://app.astrobin.com/i/u0bd2k
Night-by-night log: https://tepliyk.github.io/en/ngc-2244/