M42 Orion Nebula

SIMPLE = T / file does conform to FITS standard

BITPIX = 20 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 2718 / length of data axis 1

NAXIS2 = 2517 / length of data axis 2

NAXIS3 = 3 / length of data axis 3

EXTEND = T / FITS dataset may contain extensions

COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy

COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H

BZERO = 0 / offset data range to that of unsigned short

BSCALE = 1 / default scaling factor

DATE = '2024-01-19T14:01:00' / UTC date that FITS file was created

DATE-OBS= '2024-01-17T19:42:08' / YYYY-MM-DDThh🇲🇲ss observation start, UT

INSTRUME= 'Canon EOS 450D' / instrument name

OBSERVER= ' ' / observer name

TELESCOP= ' ' / telescope used to acquire this image

ROWORDER= 'BOTTOM-UP' / Order of the rows in image array

XPIXSZ = 5.2 / X pixel size microns

YPIXSZ = 5.2 / Y pixel size microns

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

FOCALLEN= 479.045 / Camera focal length

CCD-TEMP= 0 / CCD temp in C

EXPTIME = 60 / Exposure time [s]

STACKCNT= 47 / Stack frames

LIVETIME= 2771 / Exposure time after deadtime correction

EXPSTART= 2.46033e+06 / Exposure start time (standard Julian date)

EXPEND = 2.46033e+06 / Exposure end time (standard Julian date)

ISOSPEED= 1600 / ISO camera setting

CTYPE1 = 'RA---TAN' / Coordinate type for the first axis

CTYPE2 = 'DEC--TAN' / Coordinate type for the second axis

CUNIT1 = 'deg ' / Unit of coordinates

CUNIT2 = 'deg ' / U

Done