Astrophotography · Galaxies
Croc's Eye Galaxy
Captured and Processed by MD Shahadat Hossain Shahal
The object · NGC 4736
A detailed essay on Croc’s Eye Galaxy is coming soon.
বাংলায়
এই জ্যোতিষ্কের বিস্তারিত বাংলা বিবরণ শীঘ্রই যুক্ত হবে।
- Photographer
- MD Shahadat Hossain Shahal
- Observing location
- Bandarban , Lama (21.739769,92.168984)
- Exposure
- 90 min.
- Telescope
- Unistellar eQuinox 1 (Ashvin 1), 114 / 450 mm
- Camera
- Sony IMX224, 1.27 Mpx
- Field of view
- 37′ × 28′ arcmin (1.7 arcsec)
- Image processing
- MD Shahadat Hossain Shahal
- Processing method
- 1. Stack all calibrated frames in DeepSkyStacker (DSS). 2. Attempt plate solving inside Siril. 3. Blind Plate Solving (If Siril fails to find an astrometric solution) 4. Perform Background Extraction in Siril to remove gradients and light pollution. 5.Apply Spectrophotometric Color Calibration (SPCC) for accurate colors. 6.Remove stars from the image (using star removal tool). 7.Stretch the starless image to bring out faint details. 8.Apply noise reduction 9.Add the stars back into the processed image. 10. Apply mild sharpening to make stars cleaner and more defined. 11.Minor adjustments if needed
Astrophotographic information
- Object type
- Spiral galaxy
- Constellation
- Canes Venatici
- Distance
- 16 Mly
- Angular size
- 11.2 × 9.2 arcmin
- Physical size
- 50 Kly
- Apparent magnitude
- 9.2
Astrophysical information