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 657 frames (5h 28m)
Processing:
Siril 1.2.6:
Crop to 4000x3000px
GraXpert denoising
Photometric color calibration
StarNet++ star desaturation
StarNet++:
- separation into stars and background
- background: generalized hyperbolic stretch, black point, another generalized hyperbolic stretch, background extraction
- stars: Borodog's synthetic blue (B=2*G-R), modified arcsinh stretch, saturation, red midpoint reduction (to reduce red chroma blotching)
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= 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 = '2025-05-24T17:44:23' / UTC date that FITS file was created
DATE-OBS= '2024-06-08T01:27:18' / 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= 709.875 / Camera focal length
EXPTIME = 29.9 / Exposure time [s]
STACKCNT= 1971 / Stack frames
LIVETIME= 59012.7 / Exposure time after deadtime correction
EXPSTART= 2.46046e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46082e+06 / Exposure end time (standard Julian date)
FILTER = 'mixed ' / Active filter name
ISOSPEED= 200 / 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 ' / Unit of coordinates
EQUINOX = 2000 / Equatorial equinox
OBJCTRA = '15 38 40.955' / Image center Right Ascension (hms)
OBJCTDEC= '+59 20 59.987' / Image center Declination (dms)
RA = 234.671 / Image center Right Ascension (deg)
DEC = 59.35 / Image center Declination (deg)
CRPIX1 = 2000 / Axis1 reference pixel
CRPIX2 = 1500 / Axis2 reference pixel
CRVAL1 = 234.671 / Axis1 reference value (deg)
CRVAL2 = 59.35 / Axis2 reference value (deg)
CDELT1 = -0.000316374 / X pixel size (deg)
CDELT2 = 0.000316412 / Y pixel size (deg)
PC1_1 = 0.999986 / Linear transformation matrix (1, 1)
PC1_2 = -0.00524587 / Linear transformation matrix (1, 2)
PC2_1 = 0.0053321 / Linear transformation matrix (2, 1)
PC2_2 = 0.999986 / Linear transformation matrix (2, 2)
PLTSOLVD= T / Siril internal solve
HISTORY Histogram Transf. (mid=0.523, lo=0.000, hi=1.000)
END
File Name
gallery_361082_16772_1257580.jpg
Unix Timestamp
1748113670
Original File Size
1795330
File Type
2
Mime Type
image/jpeg
Sections Found
ANY_TAG, IFD0, COMMENT, EXIF
HTML Sizes
width="2400" height="1800"
Image Height
1800
Image Width
2400
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= 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 = '2025-05-24T17:44:23' / UTC date that FITS file was created
DATE-OBS= '2024-06-08T01:27:18' / 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= 709.875 / Camera focal length
EXPTIME = 29.9 / Exposure time [s]
STACKCNT= 1971 / Stack frames
LIVETIME= 59012.7 / Exposure time after deadtime correction
EXPSTART= 2.46046e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46082e+06 / Exposure end time (standard Julian date)
FILTER = 'mixed ' / Active filter name
ISOSPEED= 200 / 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 ' / Unit of coordinates
EQUINOX = 2000 / Equatorial equinox
OBJCTRA = '15 38 40.955' / Image center Right Ascension (hms)
OBJCTDEC= '+59 20 59.987' / Image center Declination (dms)
RA = 234.671 / Image center Right Ascension (deg)
DEC = 59.35 / Image center Declination (deg)
CRPIX1 = 2000 / Axis1 reference pixel
CRPIX2 = 1500 / Axis2 reference pixel
CRVAL1 = 234.671 / Axis1 reference value (deg)
CRVAL2 = 59.35 / Axis2 reference value (deg)
CDELT1 = -0.000316374 / X pixel size (deg)
CDELT2 = 0.000316412 / Y pixel size (deg)
PC1_1 = 0.999986 / Linear transformation matrix (1, 1)
PC1_2 = -0.00524587 / Linear transformation matrix (1, 2)
PC2_1 = 0.0053321 / Linear transformation matrix (2, 1)
PC2_2 = 0.999986 / Linear transformation matrix (2, 2)
PLTSOLVD= T / Siril internal solve
HISTORY Histogram Transf. (mid=0.523, lo=0.000, hi=1.000)
END
Orientation
The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side
1
