m31_annotated

SIMPLE = T / file does conform to FITS standard

BITPIX = -32 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 3732 / length of data axis 1

NAXIS2 = 2028 / 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

MIPS-HI = 65535 / Lower visualization cutoff

PROGRAM = 'Siril 1.4.0-beta3' / Software that created this HDU

DATE = '2025-09-20T14:10:47' / UTC date that FITS file was created

DATE-OBS= '2025-09-19T19:53:48.120346' / YYYY-MM-DDThh🇲🇲ss observation start,

IMAGETYP= 'Light ' / Type of image

EXPTIME = 60. / [s] Exposure time duration

TELESCOP= 'EQMod Mount' / Telescope used to acquire this image

FILTER = 'mixed_Starless' / Active filter name

FOCALLEN= 137. / [mm] Focal length

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

XPIXSZ = 2.90000009536743 / [um] Pixel X axis size

YPIXSZ = 2.90000009536743 / [um] Pixel Y axis size

INSTRUME= 'ZWO ASI585MM Pro' / Instrument name

CCD-TEMP= -9.89999961853027 / [degC] CCD temperature

SET-TEMP= -10. / [degC] CCD temperature setpoint

GAIN = 100 / Sensor gain

OFFSET = 15 / Sensor gain offset

CVF = 2.97254085540771 / [e-/ADU] Electrons per A/D unit

FOCPOS = 9521 / [step] Focuser position

STACKCNT= 80 / Stack frames

LIVETIME= 4800. / [s] Exposure time after deadtime correction

EXPSTART= 2460938.32015236 / [JD] Exposure start time (standard Julian date)

EXPEND = 2460938.38491547 / [JD] Exposure end time (standard Julian date)

OBJECT = 'M 31 ' / Name of the object of interest

SITELAT = 51.6553 / [deg] Observation site latitude

SITELONG= -0.0751393 / [deg] Observation site longitude

OBJCTRA = '00 42 44.822' / [H M S] Image center Right Ascension

OBJCTDEC= '+41 16 10.926' / [D M S] Image center Declination

RA = 10.6867588333452 / [deg] Image center Right Ascension

DEC = 41.2697017938427 / [deg] Image center Declination

HISTORY Crop (x=64, y=70, w=3732, h=2028)

HISTORY SCNR (type=average neutral, amount=1.00, preserve=true)

END

Done