Bortle 7 skies
Nikon D5600 camera (unmodified)
ISO 200
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
30s x 523 frames (4h 21m)
Processing:
Siril 1.2.4:
Crop to 4000x3000px
BQ Octantis' white balance, background subtraction, and histogram conditioning
StarNet star desaturation
StarNet:
- separation into stars and background
- background: generalized hyperbolic stretch (3x), background extraction, saturation
- stars: Borodog's synthetic blue (B=2*G-R), modified arcsinh stretch, saturation
RawTherapee 5.11:
L*a*b* chrominance/luminance noise reduction
Luminance noise reduction
Median filter
GIMP 2.10:
Luminance curve
Saturation
Noise reduction
Image META information
COMPUTED.UserCommentEncoding
UNDEFINED
COMPUTED.Copyright
Siril v1.2.4
IFD0.ICC_Profile
COMMENT.0
SIMPLE = T / file does conform to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 4000 / length of data axis 1
NAXIS2 = 3000 / 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= 0.713283 / 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 = '2025-03-02T16:51:29' / UTC date that FITS file was created
DATE-OBS= '2025-02-18T00:02:23' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Nikon D5600' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 3.92 / X pixel size microns
YPIXSZ = 3.92 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 1082.03 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
SET-TEMP= 0 / Temperature setting in C
EXPTIME = 29.9 / Exposure time [s]
STACKCNT= 14121 / Stack frames
LIVETIME= 422218 / Exposure time after deadtime correction
EXPSTART= 2.46072e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46074e+06 / Exposure end time (standard Julian date)
FILTER = 'mixed ' / Active filter name
ISOSPEED= 200 / ISO camera setting
END
File Name
gallery_361082_16772_6998741.jpg
Unix Timestamp
1740942041
Original File Size
7048550
File Type
2
Mime Type
image/jpeg
Sections Found
ANY_TAG, IFD0, COMMENT, EXIF
HTML Sizes
width="4000" height="3000"
Image Height
3000
Image Width
4000
Color
TRUE
Byte Order Motorola
FALSE
Image Description
SIMPLE = T / file does conform to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 4000 / length of data axis 1
NAXIS2 = 3000 / 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= 0.713283 / 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 = '2025-03-02T16:51:29' / UTC date that FITS file was created
DATE-OBS= '2025-02-18T00:02:23' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Nikon D5600' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 3.92 / X pixel size microns
YPIXSZ = 3.92 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 1082.03 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
SET-TEMP= 0 / Temperature setting in C
EXPTIME = 29.9 / Exposure time [s]
STACKCNT= 14121 / Stack frames
LIVETIME= 422218 / Exposure time after deadtime correction
EXPSTART= 2.46072e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46074e+06 / Exposure end time (standard Julian date)
FILTER = 'mixed ' / Active filter name
ISOSPEED= 200 / ISO camera setting
END
Orientation
The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side
1
