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NGC 5139 (Omega Centauri) by Spaceman 56

Uploaded by EPinNC , Mar 28 2023 01:06 PM

Owner: EPinNC (View all images and albums)
Uploaded: Mar 28 2023 01:06 PM
Taken: 2023:03:28 13:58:00
Views: 199
Album: Examples, Tests, and Random Stuff

NGC 5139 (Omega Centauri) by Spaceman 56

Image by Spaceman 56, processed from stack provided here:

https://www.cloudyni...ntauri-cluster/

Acquisition (per Spaceman 56):

2023-03-27, 186x60L, EQMod Mount, ZWO CCD ASI2600MC Pro

My processing on macOS 12.6.4 ("Monterey"):

Siril 1.2.0-beta2:

Background extraction
Photometric color calibration
Generalized hyperbolic stretch
Histogram manual adjustment

GIMP 2.10:

Levels
Temperature reduction (a bit too orange-yellow)
Luminance curve (darken the darks and brighten the stars a bit more)
Slight green luminance curve (a bit too green in places)

Image META information

COMPUTED.UserCommentEncoding	UNDEFINED
COMPUTED.Copyright	Siril v1.2.0-beta2
COMPUTED.Thumbnail.Height	167
COMPUTED.Thumbnail.Width	256
IFD0.MinSampleValue	2 2 2
IFD0.MaxSampleValue	0 0 0
IFD0.ICC_Profile
THUMBNAIL.NewSubFile	1
THUMBNAIL.ImageWidth	256
THUMBNAIL.ImageLength	167
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 = 5800 / length of data axis 1 NAXIS2 = 3800 / 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= 0.0762951 / 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 = '2023-03-28T17:53:27' / UTC date that FITS file was created DATE-OBS= '2023-03-27T12:54:21' / YYYY-MM-DDThh:mm:ss observation start, UT INSTRUME= 'ZWO CCD ASI2600MC Pro' / instrument name OBSERVER= 'Unknown ' / observer name TELESCOP= 'EQMod Mount' / telescope used to acquire this image ROWORDER= 'TOP-DOWN' / Order of the rows in image array XPIXSZ = 3.76 / X pixel size microns YPIXSZ = 3.76 / Y pixel size microns XBINNING= 1 / Camera binning mode YBINNING= 1 / Camera binning mode FOCALLEN= 448 / Camera focal length EXPTIME = 11160 / Exposure time [s] IMAGETYP= 'Light Frame' / Type of image OBJECT = 'NGC5139 ' / Name of the object of interest GAIN = 100 / Camera gain OFFSET = 48 / Camera offset SITELAT = -36.8831 / [deg] Observation site latitude SITELONG= 174.75 / [deg] Observation site longitude 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 = '13 26 44.97' / Image center Right Ascension (hms) OBJCTDEC= '-47 27 37.79' / Image center Declination (dms) RA = 201.687 / Image center Right Ascension (deg) DEC = -47.4605 / Image center Declination (deg) CRPIX1 = 2902 / Axis1 reference pixel CRPIX2 = 1847 / Axis2 reference pixel CRVAL1 = 201.687 / Axis1 reference value (deg) CRVAL2 = -47.4605 / Axis2 reference value (deg) CDELT1 = 0.000480957 / X pixel size (deg) CDELT2 = 0.000480957 / Y pixel size (deg) PC1_1 = -0.970162 / Linear transformation matrix (1, 1) PC1_2 = 0.242456 / Linear transformation matrix (1, 2) PC2_1 = -0.242456 / Linear transformation matrix (2, 1) PC2_2 = -0.970162 / Linear transformation matrix (2, 2) AIRMASS = 1.15344 / Airmass HISTORY 1 Stacking method SIGMA CLIP AVERAGE HISTORY 2 De-mosaic bayer pattern used RGGB HISTORY 3 Colour conversion: AstroC, colour for saturated stars. interpolation HISTORY Crop (x=222, y=135, w=5800, h=3800) HISTORY Background extraction (Correction: Subtraction) HISTORY Photometric CC HISTORY GHS pivot: 0.002, amount: 1075.60, local: 2.97 [0.00 1.00] HISTORY Histogram Transf. (mid=0.658, lo=0.000, hi=1.000) HISTORY Histogram Transf. (mid=0.500, lo=0.000, hi=0.918) END
File Name	gallery_361082_17642_24047113.jpg
Unix Timestamp	1680026807
Original File Size	43578413
File Type	2
Mime Type	image/jpeg
Sections Found	ANY_TAG, IFD0, THUMBNAIL, COMMENT, EXIF
HTML Sizes	width="5800" height="3800"
Image Height	3800
Image Width	5800
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 = 5800 / length of data axis 1 NAXIS2 = 3800 / 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= 0.0762951 / 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 = '2023-03-28T17:53:27' / UTC date that FITS file was created DATE-OBS= '2023-03-27T12:54:21' / YYYY-MM-DDThh:mm:ss observation start, UT INSTRUME= 'ZWO CCD ASI2600MC Pro' / instrument name OBSERVER= 'Unknown ' / observer name TELESCOP= 'EQMod Mount' / telescope used to acquire this image ROWORDER= 'TOP-DOWN' / Order of the rows in image array XPIXSZ = 3.76 / X pixel size microns YPIXSZ = 3.76 / Y pixel size microns XBINNING= 1 / Camera binning mode YBINNING= 1 / Camera binning mode FOCALLEN= 448 / Camera focal length EXPTIME = 11160 / Exposure time [s] IMAGETYP= 'Light Frame' / Type of image OBJECT = 'NGC5139 ' / Name of the object of interest GAIN = 100 / Camera gain OFFSET = 48 / Camera offset SITELAT = -36.8831 / [deg] Observation site latitude SITELONG= 174.75 / [deg] Observation site longitude 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 = '13 26 44.97' / Image center Right Ascension (hms) OBJCTDEC= '-47 27 37.79' / Image center Declination (dms) RA = 201.687 / Image center Right Ascension (deg) DEC = -47.4605 / Image center Declination (deg) CRPIX1 = 2902 / Axis1 reference pixel CRPIX2 = 1847 / Axis2 reference pixel CRVAL1 = 201.687 / Axis1 reference value (deg) CRVAL2 = -47.4605 / Axis2 reference value (deg) CDELT1 = 0.000480957 / X pixel size (deg) CDELT2 = 0.000480957 / Y pixel size (deg) PC1_1 = -0.970162 / Linear transformation matrix (1, 1) PC1_2 = 0.242456 / Linear transformation matrix (1, 2) PC2_1 = -0.242456 / Linear transformation matrix (2, 1) PC2_2 = -0.970162 / Linear transformation matrix (2, 2) AIRMASS = 1.15344 / Airmass HISTORY 1 Stacking method SIGMA CLIP AVERAGE HISTORY 2 De-mosaic bayer pattern used RGGB HISTORY 3 Colour conversion: AstroC, colour for saturated stars. interpolation HISTORY Crop (x=222, y=135, w=5800, h=3800) HISTORY Background extraction (Correction: Subtraction) HISTORY Photometric CC HISTORY GHS pivot: 0.002, amount: 1075.60, local: 2.97 [0.00 1.00] HISTORY Histogram Transf. (mid=0.658, lo=0.000, hi=1.000) HISTORY Histogram Transf. (mid=0.500, lo=0.000, hi=0.918) 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	2023:03:28 13:58:00
Copyright	Siril v1.2.0-beta2
Thumbnail Compression	JPEG Compression
Thumbnail JPEG Interchange Format	14428
Thumbnail JPEG Interchange Format Length	10483

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NGC 5139 (Omega Centauri) by Spaceman 56

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