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 274 frames (2h 17m) -- Could have done more but it just didn't seem worth it.
Processing:
Siril 1.2.4:
Crop to 4000x3000px
BQ Octantis' technique of white balance, background subtraction, and histogram conditioning
StarNet++ star desaturation
StarNet++:
- background: modified arcsinh, black point, and generalized hyperbolic stretches, saturation
- stars: synthetic blue (B=2*G-R), modified arcsinh stretch, saturation
- Single star RGB alignment on combined image
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 = '2025-03-16T00:55:00' / UTC date that FITS file was created
DATE-OBS= '2024-05-02T00:34:30' / 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= 7398 / Stack frames
LIVETIME= 221200 / Exposure time after deadtime correction
EXPSTART= 2.46043e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46044e+06 / Exposure end time (standard Julian date)
FILTER = 'mixed ' / Active filter name
ISOSPEED= 200 / ISO camera setting
HISTORY RGB alignment (PSF)
END
File Name
gallery_361082_16772_5064294.jpg
Unix Timestamp
1742087582
Original File Size
11279372
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= 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 = '2025-03-16T00:55:00' / UTC date that FITS file was created
DATE-OBS= '2024-05-02T00:34:30' / 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= 7398 / Stack frames
LIVETIME= 221200 / Exposure time after deadtime correction
EXPSTART= 2.46043e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46044e+06 / Exposure end time (standard Julian date)
FILTER = 'mixed ' / Active filter name
ISOSPEED= 200 / ISO camera setting
HISTORY RGB alignment (PSF)
END
Orientation
The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side
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