Just an experiment with some data I got a few months ago (one of the first image I ever took), now with the core less blown out. Wish I'd deconvoluted the stars, but oh well. Might do it later.
2400*1.3 seconds (52 minutes, give or take)
Untracked, unguided
Stock Canon Rebel T7, no filters
Breckenridge, CO, Bortle 4, 9200 ft, -10°C (standing outside for hours in the cold was not fun, I can tell you)
Stacked, processed, and reprocessed using Siril and Photoshop
Comments and suggestions are welcome, especially regarding how to fix the slightly off colors.
Image META information
COMPUTED.Copyright
Siril v1.2.0
IFD0.ImageWidth
6020
IFD0.ImageLength
4015
IFD0.Compression
1
IFD0.PhotometricInterpretation
2
IFD0.SamplesPerPixel
3
IFD0.PlanarConfiguration
1
1#090
%G
IPTC.Caption
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 6020 / length of data axis 1
NAXIS2 = 4015 / 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 = '2023-12-22T00:38:50' / UTC date that FITS file was created
DATE-OBS= '2023-11-18T06:31:05' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Canon EOS 1500D' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 3.7 / X pixel size microns
YPIXSZ = 3.7 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 285.931 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
EXPTIME = 1.3 / Exposure time [s]
STACKCNT= 2088 / Stack frames
LIVETIME= 2399.1 / Exposure time after deadtime correction
EXPSTART= 2.46027e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46027e+06 / Exposure end time (standard Julian date)
APERTURE= 5.6 / Aperture of the instrument
ISOSPEED= 1600 / ISO camera setting
CTYPE1 = 'RA---TAN' / Coordinate
IPTC.CopyrightNotice
Siril v1.2.0
File Name
gallery_473814_321_11771360.jpg
Unix Timestamp
1703209229
Original File Size
15238179
File Type
2
Mime Type
image/jpeg
Sections Found
ANY_TAG, IFD0, THUMBNAIL, EXIF
HTML Sizes
width="3492" height="4787"
Image Height
4787
Image Width
3492
Color
TRUE
Byte Order Motorola
FALSE
Thumbnail File Type
2
Thumbnail Mime Type
image/jpeg
Image Description
SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 6020 / length of data axis 1
NAXIS2 = 4015 / 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 = '2023-12-22T00:38:50' / UTC date that FITS file was created
DATE-OBS= '2023-11-18T06:31:05' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Canon EOS 1500D' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 3.7 / X pixel size microns
YPIXSZ = 3.7 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 285.931 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
EXPTIME = 1.3 / Exposure time [s]
STACKCNT= 2088 / Stack frames
LIVETIME= 2399.1 / Exposure time after deadtime correction
EXPSTART= 2.46027e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46027e+06 / Exposure end time (standard Julian date)
APERTURE= 5.6 / Aperture of the instrument
ISOSPEED= 1600 / ISO camera setting
CTYPE1 = 'RA---TAN' / Coordinate
Orientation
The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side
1
