Just my take on the proverbial Rose of NGC6820. Not a long dialogue about it's heritage of astronomical significance. I prefer a little bling instead of the bland.
For anyone interested:
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 6252 / length of data axis 1
NAXIS2 = 4176 / 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 = 32768 / offset data range to that of unsigned short
BSCALE = 1.0000000000000000 / default scaling factor
PROGRAM = 'PixInsight 1.8.9-1' / Software that created this HDU
COMMENT PixInsight Class Library: PCL 2.4.29
COMMENT FITS module version 1.1.10
COLORSPC = 'RGB ' / PCL: Color space
RESOLUTN = 72. / PCL: Resolution in pixels per resolution unit
RESOUNIT = 'inch ' / PCL: Resolution unit
ICCPROFL = 'ICCProfile' / PCL: File includes ICC color profile extension
THUMBIMG = 'Thumbnail' / PCL: File includes thumbnail image extension
ROWORDER = 'TOP-DOWN' / Order of pixel rows stored in the image array
DATE-OBS = '2022-10-01T05:30:13.000' / Start date/time of observation (UTC)
XPIXSZ = 3.76 / Pixel size including binning, X-axis (um)
YPIXSZ = 3.76 / Pixel size including binning, Y-axis (um)
XBINNING = 1. / Binning factor in width
YBINNING = 1. / Binning factor in height
XORGSUBF = 0. / Subframe X position in binned pixels
YORGSUBF = 0. / Subframe Y position in binned pixels
READOUTM = 'Fast ' / Readout mode of image
FILTER = 'HEUIB U ' / Filter used when taking image
IMAGETYP = 'LIGHT ' / Type of image
TRAKTIME = 1.25 / Exposure time used for autoguiding
FOCALLEN = 1109.1108 / Focal length (mm)
APTDIA = 155. / Aperture diameter of telescope in mm
APTAREA = 18869.1914007068 / Aperture area of telescope in mm^2
EGAIN = 1. / Electronic gain in e-/ADU
SBSTDVER = 'SBFITSEXT Version 1.0' / Version of SBFITSEXT standard in effect
GAIN = 60.
OFFSET = 30.
SWSERIAL = '34112-F6EFE-CJ3VQ-06WWE-K9FJ3-J3' / Software serial number
FOCUSPOS = 11032. / Focuser position in steps
FOCUSSSZ = 10. / Focuser step size in microns
FOCUSTEM = 19.7 / Focuser temperature in deg C
OBJCTALT = '66.8802 ' / Nominal altitude of center of image
OBJCTAZ = '250.0266' / Nominal azimuth of center of image
OBJCTHA = '1.5771 ' / Nominal hour angle of center of image
JD = 2459853.632486 / Julian Date at time of exposure
JD-HELIO = 2459853.63603731 / Heliocentric Julian Date at time of exposure
AIRMASS = 1.07928260079079 / Relative optical path length through atmosphere
AOCAMBT = 20.9 / Obs. Conditions-Ambient temperature in deg C
AOCDEW = 6.4 / Obs. Conditions-Dewpoint in deg C
AOCBAROM = 964.15 / Obs. Conditions-Barometric pressure in hPa
AOCSKYBR = 0. / Obs. Conditions-Sky brightness in Lux
AOCSKYQU = 0. / Obs. Conditions-Sky quality (mags per arcsec^2)
AOCSKYT = 0. / Obs. Conditions-Sky temperature in deg C
AOCFWHM = 0. / Obs. Conditions-Seeing FWHM in arcsec
AOCHUM = 39. / Obs. Conditions-Humidity in percent
OBJECT = 'NGC6820 (Vul) Some Pillars'
TELESCOP = 'AP155F_AP1200GTO'
INSTRUME = 'QHY268C '
OBSERVER = 'John Jennings'
NOTES = 'SOFAR 2022'
FLIPSTAT = ' '
OBSERVAT = 'SOFAR Remote Observatory'
MPSAS = '21.86 '
FOCUSER = '11032 '
RDNOISE = 10.
RA = 295.61554923564 / Right ascension of the center of the image (deg
DEC = 23.058481180632 / Declination of the center of the image (deg)
CENTAZ = '250.0 ' / Nominal Azimuth of center of image in deg
CENTALT = '66.9 ' / Nominal Altitude of center of image in deg
CSTRETCH = 'Medium ' / Initial display stretch mode
CBLACK = 385. / Initial display black level in ADUs
CWHITE = 1544. / Initial display white level in ADUs
PEDESTAL = 0. / Correction to add for zero-based ADU
SWOWNER = 'John Jennings' / Licensed owner of software
COMMENT 1 Written by ASTAP.
www.hnsky.orgCALSTAT = 'DFBS '
COMMENT D = master_dark_30x300s_at_0C_2022-08-21.fit
COMMENT F = master_flat_corrected_with_flat_darks_HEUIBU_40xF_80xFD_2022-08-22
HISTORY 1 Stacking method SIGMA CLIP AVERAGE
HISTORY 2 De-mosaic bayer pattern used RGGB
HISTORY 3 Colour conversion: Bilinear interpolation interpolation.
EXPTIME = 6000. / Total luminance exposure time in seconds.
SET-TEMP = 0. / Set temperature used for luminance.
LUM_EXP = 300. / Average luminance exposure time.
LUM_CNT = 20. / Luminance images combined.
LUM_DARK = 30. / Darks used for luminance.
LUM_FLAT = 40. / Flats used for luminance.
LUM_BIAS = 80. / Flat-darks used for luminance.
DATAMIN = 0. / Minimum data value
DATAMAX = 65431. / Maximum data value
INPUTFMT = 'FITS ' / Format of file from which image was read
OBSGEO-L = -99.2863889 / Geodetic longitude of observation location (deg
OBSGEO-B = 33.2819444 / Geodetic latitude of observation location (deg)
COMMENT Astrometric solution by PixInsight 1.8.9-1
TIMESYS = 'UTC ' / Time scale: Universal Time, Coordinated
DATE-END = '2022-10-01T07:10:13.000' / End date/time of observation (UTC)
LONG-OBS = -99.2863889 / Geodetic longitude (deg) (compatibility)
LAT-OBS = 33.2819444 / Geodetic latitude (deg) (compatibility)
OBJCTRA = '19 42 27.732' / Right ascension (hours) (compatibility)
OBJCTDEC = '+23 03 30.53' / Declination (deg) (compatibility)
RADESYS = 'ICRS ' / Coordinates referred to ICRS / J2000.0
CTYPE1 = 'RA---TAN' / Axis1 projection: Gnomonic
CTYPE2 = 'DEC--TAN' / Axis2 projection: Gnomonic
CRPIX1 = 3126.47361026 / Axis1 reference pixel
CRPIX2 = 2088.62065439 / Axis2 reference pixel
CRVAL1 = 295.61554911423 / Axis1 reference value
CRVAL2 = 23.0584813390319 / Axis2 reference value
PV1_1 = 0. / Native longitude of the reference point (deg)
PV1_2 = 0. / Native latitude of the reference point (deg)
CD1_1 = -0.0001942218198783 / Scale matrix (1,1)
CD1_2 = -5.137326281E-07 / Scale matrix (1,2)
CD2_1 = -5.484898749E-07 / Scale matrix (2,1)
CD2_2 = 0.0001942539145896 / Scale matrix (2,2)
REFSPLIN = T / Thin plate spline astrometric solution availabl
CDELT1 = -0.000194222545938718 / Axis1 scale
CDELT2 = 0.000194254640769997 / Axis2 scale
CROTA1 = 0.156665844738854 / Axis1 rotation angle (deg)
CROTA2 = 0.156665844738854 / Axis2 rotation angle (deg)
COMMENT Color calibration with PixInsight 1.8.9-1
HISTORY Color calibration with ColorCalibration module version 1.9.3
HISTORY Color calibration with PhotometricColorCalibration process
HISTORY PCC.fit_Sr_JV_R_G: 3.022708e-01 1.088392e+00 2.741872e-01
HISTORY PCC.fit_JB_JV_B_G: -2.292486e-01 3.768670e-01 1.364945e-01
HISTORY PCC.white_Sr_JV: -6.44000e-01
HISTORY PCC.white_JB_JV: 1.18984e+00
HISTORY PCC.zero_Sr_JV: -1.24030e-01
HISTORY PCC.zero_JB_JV: -4.22920e-01
HISTORY PCC.scale_Sr_JV_JB_JV: 0.5535 0.7056 1.0000
HISTORY PCC.backgroundReference: 0.00383001 0.00488289 0.00691234
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