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NGC 869 and NGC 884 (Double Cluster)

Uploaded by EPinNC , Nov 06 2023 10:17 AM

Owner: EPinNC (View all images and albums)
Uploaded: Nov 06 2023 10:17 AM
Taken: 2023:11:05 10:45:10
Views: 146
Album: Tracked Telescope and Camera/Lens Images

Acquisition:

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 249 frames (2h 4.5m)

Processing:

Siril 1.2.0:

Crop to 5000 x 3600px
Photometric color calibration
Background extraction
Star desaturation
StarNet++: modified asinh stretch (several times), histogram adjustment

GIMP 2.10:

Luminance curve
Saturation

Image META information

COMPUTED.UserCommentEncoding	UNDEFINED
COMPUTED.Copyright	Siril v1.2.0
COMPUTED.Thumbnail.Height	184
COMPUTED.Thumbnail.Width	256
IFD0.MinSampleValue	5 5 5
IFD0.MaxSampleValue	22870 22870 22870
IFD0.ICC_Profile
THUMBNAIL.NewSubFile	1
THUMBNAIL.ImageWidth	256
THUMBNAIL.ImageLength	184
THUMBNAIL.PhotometricInterpretation	6
THUMBNAIL.SamplesPerPixel	3
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 = 5000 / length of data axis 1 NAXIS2 = 3600 / 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= 6.10361e-05 / Lower visualization cutoff BZERO = 0 / offset data range to that of unsigned short BSCALE = 1 / default scaling factor DATE = '2023-11-05T15:39:15' / UTC date that FITS file was created DATE-OBS= '2023-10-12T23:43:46' / 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= 709.342 / Camera focal length CCD-TEMP= 0 / CCD temp in C EXPTIME = 29.9 / Exposure time [s] STACKCNT= 249 / Stack frames LIVETIME= 7445.1 / Exposure time after deadtime correction EXPSTART= 2.46023e+06 / Exposure start time (standard Julian date) EXPEND = 2.46025e+06 / Exposure end time (standard Julian date) 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 = '02 20 39.203' / Image center Right Ascension (hms) OBJCTDEC= '+57 09 0.139' / Image center Declination (dms) RA = 35.1633 / Image center Right Ascension (deg) DEC = 57.15 / Image center Declination (deg) CRPIX1 = 2500 / Axis1 reference pixel CRPIX2 = 1800 / Axis2 reference pixel CRVAL1 = 35.1633 / Axis1 reference value (deg) CRVAL2 = 57.15 / Axis2 reference value (deg) CDELT1 = -0.000316715 / X pixel size (deg) CDELT2 = 0.000316539 / Y pixel size (deg) PC1_1 = 0.999997 / Linear transformation matrix (1, 1) PC1_2 = -0.00155805 / Linear transformation matrix (1, 2) PC2_1 = 0.00244938 / Linear transformation matrix (2, 1) PC2_2 = 0.999999 / Linear transformation matrix (2, 2) PLTSOLVD= T / Siril internal solve HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3 HISTORY .000), additive+scaling normalized input, unnormalized output, no image HISTORY weighting, unequalized RGB HISTORY Crop (x=445, y=178, w=5000, h=3600) HISTORY Photometric CC HISTORY Background extraction (Correction: Subtraction) HISTORY Synthetic stars: desaturate clipped stars HISTORY GHS ASINH pivot: 0.001, amount: 19.09 [0.00 1.00] HISTORY GHS ASINH pivot: 0.002, amount: 19.09 [0.00 1.00] HISTORY GHS ASINH pivot: 0.003, amount: 19.09 [0.00 1.00] HISTORY GHS ASINH pivot: 0.004, amount: 19.09 [0.00 1.00] HISTORY Histogram Transf. (mid=0.261, lo=0.029, hi=1.000) END
File Name	gallery_361082_16772_24874587.jpg
Unix Timestamp	1699283849
Original File Size	35625729
File Type	2
Mime Type	image/jpeg
Sections Found	ANY_TAG, IFD0, THUMBNAIL, COMMENT, EXIF
HTML Sizes	width="5000" height="3600"
Image Height	3600
Image Width	5000
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 = -32 / number of bits per data pixel NAXIS = 3 / number of data axes NAXIS1 = 5000 / length of data axis 1 NAXIS2 = 3600 / 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= 6.10361e-05 / Lower visualization cutoff BZERO = 0 / offset data range to that of unsigned short BSCALE = 1 / default scaling factor DATE = '2023-11-05T15:39:15' / UTC date that FITS file was created DATE-OBS= '2023-10-12T23:43:46' / 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= 709.342 / Camera focal length CCD-TEMP= 0 / CCD temp in C EXPTIME = 29.9 / Exposure time [s] STACKCNT= 249 / Stack frames LIVETIME= 7445.1 / Exposure time after deadtime correction EXPSTART= 2.46023e+06 / Exposure start time (standard Julian date) EXPEND = 2.46025e+06 / Exposure end time (standard Julian date) 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 = '02 20 39.203' / Image center Right Ascension (hms) OBJCTDEC= '+57 09 0.139' / Image center Declination (dms) RA = 35.1633 / Image center Right Ascension (deg) DEC = 57.15 / Image center Declination (deg) CRPIX1 = 2500 / Axis1 reference pixel CRPIX2 = 1800 / Axis2 reference pixel CRVAL1 = 35.1633 / Axis1 reference value (deg) CRVAL2 = 57.15 / Axis2 reference value (deg) CDELT1 = -0.000316715 / X pixel size (deg) CDELT2 = 0.000316539 / Y pixel size (deg) PC1_1 = 0.999997 / Linear transformation matrix (1, 1) PC1_2 = -0.00155805 / Linear transformation matrix (1, 2) PC2_1 = 0.00244938 / Linear transformation matrix (2, 1) PC2_2 = 0.999999 / Linear transformation matrix (2, 2) PLTSOLVD= T / Siril internal solve HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3 HISTORY .000), additive+scaling normalized input, unnormalized output, no image HISTORY weighting, unequalized RGB HISTORY Crop (x=445, y=178, w=5000, h=3600) HISTORY Photometric CC HISTORY Background extraction (Correction: Subtraction) HISTORY Synthetic stars: desaturate clipped stars HISTORY GHS ASINH pivot: 0.001, amount: 19.09 [0.00 1.00] HISTORY GHS ASINH pivot: 0.002, amount: 19.09 [0.00 1.00] HISTORY GHS ASINH pivot: 0.003, amount: 19.09 [0.00 1.00] HISTORY GHS ASINH pivot: 0.004, amount: 19.09 [0.00 1.00] HISTORY Histogram Transf. (mid=0.261, lo=0.029, 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
X-Resolution	72/1
Y-Resolution	72/1
Resolution Unit	2
Software	GIMP 2.10.28
Date Taken	2023:11:05 10:45:10
Copyright	Siril v1.2.0
Thumbnail Compression	JPEG Compression
Thumbnail JPEG Interchange Format	14880
Thumbnail JPEG Interchange Format Length	10543

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NGC 869 and NGC 884 (Double Cluster)

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