NGC 7023, nébuleuse de l’Iris, aout 2023 (Lacanau)
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 3008 / length of data axis 1
NAXIS2 = 3008 / 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
MIPS-FHI= 1 / Upper visualization cutoff
MIPS-FLO= 0 / Lower visualization cutoff
BZERO = 0 / offset data range to that of unsigned short
BSCALE = 1 / default scaling factor
DATE = ‘2023-12-20T18:11:18’ / UTC date that FITS file was created
DATE-OBS= ‘2023-07-17T22:11:03’ / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= ‘ZWO ASI533MC Pro’ / instrument name
OBSERVER= ‘ ‘ / observer name
TELESCOP= ‘EQ5-C6 r duit’ / telescope used to acquire this image
XPIXSZ = 3.76 / X pixel size microns
YPIXSZ = 3.76 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 480.817 / Camera focal length
CCD-TEMP= 4.1 / CCD temp in C
EXPTIME = 240 / Exposure time [s]
STACKCNT= 542 / Stack frames
LIVETIME= 79680 / Exposure time after deadtime correction
EXPSTART= 2.46014e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46016e+06 / Exposure end time (standard Julian date)
FILTER = ‘mixed ‘ / Active filter name
IMAGETYP= ‘Light Frame’ / Type of image
OBJECT = ‘NGC7023 ‘ / Name of the object of interest
CVF = 1.0056 / Conversion factor (e-/adu)
Matériel :
Monture équatoriale Skywatcher
Lunette TS Optics 80 / 480 / 380
Pas de filtre
Caméra ZWO ASI 533 couleur refroidie
Guidage (lunette 60, caméra ASI 178 monochrome)
Prise de vues :
140 poses de 60 secondes et 137 poses de 240 secondes (en 4 nuits) = 11,5 heures au total
