NGC 2174 – Monkey Head Nebula – is an H II emission nebula located in the constellation Orion and is associated with the open star cluster NGC 2175. It is thought to be located about 6,400 light-years away from Earth. The nebula may have formed through hierarchical collapse. There is some equivocation in the use of the identifiers NGC 2174 and NGC 2175. These may apply to the entire nebula, to its brightest knot, or to the star cluster it includes.
Imaging telescopes or lenses: Officina Stellare Veloce RH200
Imaging cameras: QSI 683WSG
Mounts: Skywatcher N-EQ6 pro
Guiding telescopes or lenses: Officina Stellare Veloce RH200
Guiding cameras: Lodestar
Software: PixInsight, Maxim DL
Filters: Astrodon Ha 3nm Tru-Balance, Astrodon True balance R, Astrodon True balance B, Astrodon True balance G, Astrodon True balance L
Accessories: Finger Lake Instruments Atlas Focuser
Resolution: 3266×2480
Dates: Jan. 24, 2015, Feb. 10, 2015
Frames:
Astrodon Ha 3nm Tru-Balance: 9×1200″ bin 1×1
Astrodon True balance B: 6×300″ bin 2×2
Astrodon True balance G: 6×300″ bin 2×2
Astrodon True balance L: 11×600″ bin 1×1
Astrodon True balance R: 6×300″ bin 2×2
Astrodon Ha 3nm Tru-Balance: 9×1200″ bin 1×1
Astrodon True balance B: 6×300″ bin 2×2
Astrodon True balance G: 6×300″ bin 2×2
Astrodon True balance L: 11×600″ bin 1×1
Astrodon True balance R: 6×300″ bin 2×2
Integration: 6.3 hours
Avg. Moon age: 12.04 days
Avg. Moon phase: 43.55%
RA center: 92.415 degrees
DEC center: 20.469 degrees
Orientation: 87.075 degrees
Field radius: 1.056 degrees
Author: Davide Manca