Horsehead (2)
Gaining more experience with my ASI camera 1600mm pro (see also earlier results), I have obtained images of the Horsehead nebula using standard broad-band filters L (Luminance, UV-IR cut), R (red), G (green), and B (blue), and using a narrow-band filter at H-alpha (656 nm, 12 nm HFWM). With a narrowband filter, light pollution or moonlight is a minor problem and the emission of hydrogen is more pronounced.
Horsehead nebula and Flame nebula, Kempen (D), William Optics 110 mm APO FLT f/7, ASI 1600mm pro,
top: 15 November 2023, 8 January 2024 & 10 January 2024, L (UV/IR cut), 9720 s
bottom: 16. January 2024, H-alpha (656nm, 12 nm), 7560 s, PixInsight V 1.8.9. The number of stars and their brightness in H-alpha is clearly reduced compared to the broadband image in L. The faint gas structures (hydrogen) are more pronounced.
Horsehead nebula and Flame nebula, Kempen (D), William Optics 110 mm APO FLT f/7, ASI 1600mm pro,
top: LRGB combination, 15 November 2023, 8, 9, & 10 January 2024, L (9720 s), R (2400 s), G (2520 s), B (2400 s)
bottom: H-alpha/LRGB combination, 15 November 2023, 8, 9, 10, & 16 January 2024,
H-alpha (7560 s), L (9600 s), R (2400 s), G (2520 s), B (2400 s) , PixInsight V 1.8.9
Horsehead nebula and Flame nebula, Kempen (D), William Optics 110 mm APO FLT f/7, ASI 1600mm pro,
15 November 2023, 8 January 2024, 10 January 2024,
L-Filter (UV/IR cut) 9720 sec, R—Filter (2400 sec), G-Filter (2520 sec), B-Filter (2400 sec), PixInsight V 1.8.9
