DATE = '2024-06-20T08:10:42' / UTC date that FITS file was created
DATE-OBS= '2024-06-20T06:34:33.496417' / YYYY-MM-DDThh:mm:ss observation start,
TELESCOP= 'Seestar S50' / telescope used to acquire this image
XPIXSZ = 2.9 / X pixel size microns
YPIXSZ = 2.9 / Y pixel size microns
FOCALLEN= 252.231 / Camera focal length
CCD-TEMP= 20.9375 / CCD temp in C
EXPTIME = 10 / Exposure time [s]
STACKCNT= 277 / Stack frames
FILTER = 'LP '
OBJECT = 'NGC 6888' Cresent Nebula

SIRIL processing
HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3
HISTORY .000), additive+scaling normalized input, normalized output, no image we
HISTORY ighting, unequalized RGB
HISTORY Crop (x=41, y=68, w=971, h=1758)
HISTORY SCNR (type=average neutral, amount=1.00, preserve=true)
HISTORY Photometric CC
HISTORY Background extraction (Correction: Subtraction)
HISTORY Histogram Transf. (mid=0.000, lo=0.000, hi=1.000)
HISTORY Deconvolution
HISTORY Saturation enhancement (amount=0.73)
END