Księżycowa Przełęcz Tąpadła
Warunki do zdjęć, ze względu na fazę Księżyca (oświetlenie 45%), nie są już optymalne. Ale głęboki kolor dziennego nieba zachęca do wyjazdu.
Ustawienie zestawu Askar 50/200, SWSA i znalezienie komety zajmuje ok. 20 minut.
Crop z klatki (fot.Mruk)
Stack klatek (fot.Mruk)
Postproces
DeepSkyStacker
light, dark, flat, bias
Siril 1.2 - fotometria
Ciekawe że fotometria nie złapała kolorów za pierwszym razem, i trzeba było powtarzać. W każdym razie ogon jest wyraźnie pyłowy.
09:16:15: Searching tyc 290-467-1 in SIMBAD...
09:16:25: There is no valid WCS information in the header. Let's make a plate solving.
09:16:28: Catalog NOMAD size: 189 objects
09:16:28: Findstar: processing for channel 1...
09:16:29: Saved focal length 225.26 and pixel size 6.42 as default values
09:16:29: Image center: alpha: 12h45m28s, delta: +00°42'08"
09:16:29: Normalizing on green channel.
09:16:29: Photometry radii set to 14.7 for inner and 24.7 for outer
09:16:29: Applying aperture photometry to 188 stars.
09:16:29: 183 stars excluded from the calculation
09:16:29: Distribution of errors: 30 no error, 38 inner radius too small, 145 pixel out of range
09:16:29: Found a solution for color calibration using 5 stars. Factors:
09:16:29: K0: 1.699 (deviation: 0.033)
09:16:29: K1: 1.000 (deviation: 0.412)
09:16:29: K2: 0.417 (deviation: 0.340)
09:16:29: The photometric color calibration has found a solution which may not be perfect because it did not rely on many stars
09:16:29: After renormalization, the following coefficients are applied
09:16:29: White balance factors:
09:16:29: K0: 1.000
09:16:29: K1: 0.589
09:16:29: K2: 0.246
09:16:29: Background reference:
09:16:29: B0: +0.00000e+00
09:16:29: B1: +6.81784e-02
09:16:29: B2: +1.25081e-01
09:16:29: Photometric Color Calibration succeeded.
09:16:55: Existing plate solve (WCS information) will be resused for image
09:16:55: Findstar: processing for channel 0...
09:16:55: Findstar: processing for channel 1...
09:16:55: Findstar: processing for channel 2...
09:16:56: Image has a field of view of 12.30 degrees, using a limit magnitude of 9.25
09:17:01: The NOMAD catalog has been successfully downloaded.
09:17:01: Normalizing on blue channel.
09:17:01: Photometry radii set to 20.6 for inner and 30.6 for outer
09:17:01: Applying aperture photometry to 160 stars.
09:17:01: 153 stars excluded from the calculation
09:17:01: Distribution of errors: 21 no error, 5 not in area, 24 inner radius too small, 124 pixel out of range
09:17:01: Found a solution for color calibration using 7 stars. Factors:
09:17:01: K0: 0.319 (deviation: 0.009)
09:17:01: K1: 0.497 (deviation: 0.052)
09:17:01: K2: 1.000 (deviation: 0.214)
09:17:01: The photometric color calibration has found a solution which may not be perfect because it did not rely on many stars
09:17:01: After renormalization, the following coefficients are applied
09:17:01: White balance factors:
09:17:01: K0: 1.000
09:17:01: K1: 1.557
09:17:01: K2: 3.132
09:17:01: Background reference:
09:17:01: B0: +0.00000e+00
09:17:01: B1: -9.21840e-02
09:17:01: B2: -3.53114e-01
09:17:01: Photometric Color Calibration succeeded.