ES127_22m0s_C63 (NGC 7293,Helix Nebula)

SIMPLE = T / file does conform to FITS standard

BITPIX = -32 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 4943 / length of data axis 1

NAXIS2 = 3670 / 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

BZERO = 0. / Offset data range to that of unsigned short

BSCALE = 1. / Default scaling factor

PROGRAM = 'Siril 1.4.0-beta3' / Software that created this HDU

DATE = '2025-09-13T16:21:39' / UTC date that FITS file was created

DATE-OBS= '2025-09-13T07:33:14.700861' / YYYY-MM-DDThh🇲🇲ss observation start,

ROWORDER= 'TOP-DOWN' / Order of the rows in image array

EXPTIME = 1320.000022 / [s] Exposure time duration

OBSERVER= 'DaveMartin' / Observer name

FILTER = 'L_Enhance' / Active filter name

FOCALLEN= 955.37 / [mm] Focal length

CENTALT = 8.59444444444444 / [deg] Altitude of telescope

CENTAZ = 234.1125 / [deg] Azimuth of telescope

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

XPIXSZ = 3.76 / [um] Pixel X axis size

YPIXSZ = 3.76 / [um] Pixel Y axis size

INSTRUME= 'ZWO ASI2600MC Pro' / Instrument name

CCD-TEMP= -10. / [degC] CCD temperature

SET-TEMP= -10. / [degC] CCD temperature setpoint

GAIN = 100 / Sensor gain

OFFSET = 12 / Sensor gain offset

CVF = 0.2636 / [e-/ADU] Electrons per A/D unit

FOCPOS = 19802 / [step] Focuser position

FOCTEMP = 11.0799999237061 / [degC] Focuser temperature

OBJECT = 'C63 (NGC 7293,Helix Nebula)' / Name of the object of interest

AIRMASS = 6.4070293526238 / Airmass at frame center (Gueymard 1993)

SITELAT = 39.3488888888889 / [deg] Observation site latitude

SITELONG= -78.8116666666667 / [deg] Observation site longitude

OBJCTRA = '22 29 34.310' / [H M S] Image center Right Ascension

OBJCTDEC= '-20 51 16.945' / [D M S] Image center Declination

RA = 337.392959615903 / [deg] Image center Right Ascension

DEC = -20.854706898486 / [deg] Image center Declination

CTYPE1 = 'RA---TAN-SIP' / TAN (gnomic) projection + SIP distortions

CTYPE2 = 'DEC--TAN-SIP' / TAN (gnomic) projection + SIP distortions

CUNIT1 = 'deg ' / Unit of coordinates

CUNIT2 = 'deg ' / Unit of coordinates

EQUINOX = 2000. / Equatorial equinox

CRPIX1 = 2709.5 / Axis1 reference pixel

CRPIX2 = 1773.5 / Axis2 reference pixel

CRVAL1 = 337.399128956553 / [deg] Axis1 reference value

CRVAL2 = -20.7996295478691 / [deg] Axis2 reference value

LONPOLE = 180. / Native longitude of celestial pole

CDELT1 = -0.000225510163891526 / [deg] X pixel size

CDELT2 = 0.000225482084942629 / [deg] Y pixel size

PC1_1 = -0.351969936537546 / Linear transformation matrix (1, 1)

PC1_2 = -0.936011305366424 / Linear transformation matrix (1, 2)

PC2_1 = 0.937876811192815 / Linear transformation matrix (2, 1)

PC2_2 = -0.346968423673967 / Linear transformation matrix (2, 2)

A_ORDER = 3 / SIP polynomial degree, axis 1, pixel-to-sky

A_0_0 = 0.

A_1_0 = 0.

A_0_1 = 0.

A_2_0 = -2.48155267587289E-07

A_1_1 = -7.37080951713459E-08

A_0_2 = -1.0185402233959E-07

A_3_0 = -3.10786560799088E-10

A_2_1 = 8.79569903156368E-12

A_1_2 = -3.04846006866839E-10

A_0_3 = -6.06085117746066E-12

B_ORDER = 3 / SIP polynomial degree, axis 2, pixel-to-sky

B_0_0 = 0.

B_1_0 = 0.

B_0_1 = 0.

B_2_0 = -3.71136982152501E-08

B_1_1 = -1.11144100001858E-07

B_0_2 = -5.09393009922912E-08

B_3_0 = 2.75713447794016E-12

B_2_1 = -3.11590449454089E-10

B_1_2 = -6.9918394766723E-12

B_0_3 = -3.05627306702949E-10

AP_ORDER= 3 / SIP polynomial degree, axis 1, sky-to-pixel

AP_0_0 = -0.00559933092150055

AP_1_0 = -1.45363595953629E-05

AP_0_1 = 7.38507103618295E-07

AP_2_0 = 2.52501933424886E-07

AP_1_1 = 7.48399998784623E-08

AP_0_2 = 1.03410289057783E-07

AP_3_0 = 3.15385485065831E-10

AP_2_1 = -8.99122166542793E-12

AP_1_2 = 3.09872377490142E-10

AP_0_3 = 5.99122956285838E-12

BP_ORDER= 3 / SIP polynomial degree, axis 2, sky-to-pixel

BP_0_0 = -0.00122174326625579

BP_1_0 = 4.65612420164889E-07

BP_0_1 = -1.03552261550011E-05

BP_2_0 = 3.76509361056749E-08

BP_1_1 = 1.13004217667708E-07

BP_0_2 = 5.16834230646392E-08

BP_3_0 = -2.81176655378289E-12

BP_2_1 = 3.16109793723774E-10

BP_1_2 = 6.89386424550257E-12

BP_0_3 = 3.09074307921957E-10

PLTSOLVD= T / Siril internal solver

HISTORY Plate Solve

HISTORY Crop (x=415, y=191, w=4943, h=3670)

HISTORY Background extraction (Correction: Subtraction)

HISTORY Photometric CC (algorithm: PCC)

HISTORY GraXpert AI denoise: strength 0.50

HISTORY Histogram Transf. (mid=0.000, lo=0.012, hi=1.000)

HISTORY GHS INV pivot: 0.000, amount: 1.36, local: 0.00 [0.00 1.00]

HISTORY GHS pivot: 0.092, amount: 3.39, local: -3.28 [0.00 1.00]

HISTORY GHS INV pivot: 0.034, amount: 1.36, local: 0.00 [0.00 1.00]

PIERSIDE= 'EAST' /

CAMID = '1E1E560D0B020900' /

ADCBITS = 16 / Bit depth of camera sensor ADC in current mode

BIASADU = 121.16593933105469 / ADU for bias level (no photons) at current sett

EGAINSAV= 0.26355 / Electrons per ADU at saved bit depth

RELGAIN = 2.964 / Multiplicative gain relative to minumum

RDNOISE = 1.77 / Read noise in electrons

SUBEXP = 60.000001 /

COLORTYP= 'RGB' /

DATE-END= '2025-09-13T07:56:37.3603735' / System Clock:Est. Frame End

DATE-AVG= '2025-09-13T07:44:56.0306173' / System Clock:Est. Frame Mid Point

JD_UTC = 2460931.822870725 / Julian Date at mid exposure

END

Done