4th (5th?) attempt at M42
Taken from my Bortle 7 backyard over 5 nights
Stock Canon Rebel XTi (18 year old camera), 70-300 mm f/5.6 lens
Star Adventurer GTi, unguided
ISO 1600, 30", f/6.3
660 x 30" frames stacked and processed in Siril and Photoshop (finally getting the hang of GHS)
Better than my first few attempts in terms of detail (finally some dust!), but the CA is much worse for some reason (stars look absolutely atrocious)
I'll eventually revisit it with a duoband filter and an actual modified camera, I hope (not much time left in the season)
Image META information
COMPUTED.Copyright
Siril v1.2.0
IFD0.ImageWidth
1694
IFD0.ImageLength
2543
IFD0.Compression
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IFD0.PhotometricInterpretation
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IFD0.SamplesPerPixel
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IFD0.PlanarConfiguration
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%G
IPTC.Caption
SIMPLE = T / file does conform to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 1694 / length of data axis 1
NAXIS2 = 2543 / 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 = '2024-02-19T04:22:54' / UTC date that FITS file was created
DATE-OBS= '2024-01-30T02:43:32' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Canon EOS 400D' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 5.71 / X pixel size microns
YPIXSZ = 5.71 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 287.013 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
EXPTIME = 30 / Exposure time [s]
STACKCNT= 948 / Stack frames
LIVETIME= 28440 / Exposure time after deadtime correction
EXPSTART= 2.46034e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46035e+06 / Exposure end time (standard Julian date)
APERTURE= 6.3 / Aperture of the instrument
ISOSPEED= 1600 / ISO camera setting
CTYPE1 = 'RA---TAN' / Coordinate
IPTC.CopyrightNotice
Siril v1.2.0
File Name
gallery_473814_321_2664935.jpg
Unix Timestamp
1708318951
Original File Size
5610704
File Type
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Mime Type
image/jpeg
Sections Found
ANY_TAG, IFD0, THUMBNAIL, EXIF
HTML Sizes
width="1694" height="2543"
Image Height
2543
Image Width
1694
Color
TRUE
Byte Order Motorola
FALSE
Thumbnail File Type
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Thumbnail Mime Type
image/jpeg
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 = 1694 / length of data axis 1
NAXIS2 = 2543 / 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 = '2024-02-19T04:22:54' / UTC date that FITS file was created
DATE-OBS= '2024-01-30T02:43:32' / YYYY-MM-DDThh:mm:ss observation start, UT
INSTRUME= 'Canon EOS 400D' / instrument name
OBSERVER= ' ' / observer name
TELESCOP= ' ' / telescope used to acquire this image
ROWORDER= 'BOTTOM-UP' / Order of the rows in image array
XPIXSZ = 5.71 / X pixel size microns
YPIXSZ = 5.71 / Y pixel size microns
XBINNING= 1 / Camera binning mode
YBINNING= 1 / Camera binning mode
FOCALLEN= 287.013 / Camera focal length
CCD-TEMP= 0 / CCD temp in C
EXPTIME = 30 / Exposure time [s]
STACKCNT= 948 / Stack frames
LIVETIME= 28440 / Exposure time after deadtime correction
EXPSTART= 2.46034e+06 / Exposure start time (standard Julian date)
EXPEND = 2.46035e+06 / Exposure end time (standard Julian date)
APERTURE= 6.3 / 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
