Comet C/2025 A6 Lemmon in Leo Minor, stacking on comet and stars (combine image)
OBJECT: Comet C/2025 A6 Lemmon in Leo Minor, apparent magnitude approx 7, apparent dimension 6’ coma x approx 3° tail.
CALIBRATION: RA 10h 01m, DEC +40°51', FOV 4,2°x 2,8°, Pixel scale 3,96 arcsec/px, Image size 3840 x 2560 px, Cropped 1,56x.
GEAR: Nikon Z7 Kolari Full Spectrum + Nikkor Z 400/4,5, Kolari H+ Clip in filter, UV lens filter, Dew heater strip, Sensor pixel scale 2,25 arcsec/px (Z400), tracking mount iOptron HEM27EC - ipolar alignment, No auto guiding.
ACQUISITION: October 4, 2025, Struz, CZ, Subexposure 120s, f 4,5, ISO 1600, Interval 10 s, RAW-L, Lights 40x, Bias 25x, Darks 25x, Flats 25x, Total exposure time 80 min. Night, no Moon, no wind, temperature 0° C, Backyard - Light pollution - Bortle 5.
STACKING AND POST PROCESSING: Stacking in Pixinsight (WBPP), post processing in Pixinsight ( DynamicCrop, GradientCorr, ColorCalibration, CometAlignment, StarXTerm, streching via HistogramTrans, ImageIntegration, PixelMath). Adobe Photoshop CC 2025 (final color, brightness tuning, resizing and export to jpg sRGB).
Comet C/2025 A6 Lemmon in Leo Minor, stacking on comet and stars (combine image)
OBJECT: Comet C/2025 A6 Lemmon in Leo Minor, apparent magnitude approx 7, apparent dimension 6’ coma x approx 3° tail.
CALIBRATION: RA 10h 01m, DEC +40°51', FOV 4,2°x 2,8°, Pixel scale 3,96 arcsec/px, Image size 3840 x 2560 px, Cropped 1,56x.
GEAR: Nikon Z7 Kolari Full Spectrum + Nikkor Z 400/4,5, Kolari H+ Clip in filter, UV lens filter, Dew heater strip, Sensor pixel scale 2,25 arcsec/px (Z400), tracking mount iOptron HEM27EC - ipolar alignment, No auto guiding.
ACQUISITION: October 4, 2025, Struz, CZ, Subexposure 120s, f 4,5, ISO 1600, Interval 10 s, RAW-L, Lights 40x, Bias 25x, Darks 25x, Flats 25x, Total exposure time 80 min. Night, no Moon, no wind, temperature 0° C, Backyard - Light pollution - Bortle 5.
STACKING AND POST PROCESSING: Stacking in Pixinsight (WBPP), post processing in Pixinsight ( DynamicCrop, GradientCorr, ColorCalibration, CometAlignment, StarXTerm, streching via HistogramTrans, ImageIntegration, PixelMath). Adobe Photoshop CC 2025 (final color, brightness tuning, resizing and export to jpg sRGB).