NGC 2174 (also known as 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.

S2-Ha-O3 image mapped as RGB (Hubble mapping)
Ha as Luminance - 20X900 sec total of 5 HRS (BIN 1)
S2,O3 60 min each (BIN 3)

Total of 7 HRS

Telescope - 8" F8 GSO RC (Carbon tube)
Mount - ASA DDM 60 PRO
NO GUIDING :)
Camera - SBIG ST8300M with BAADER filters.
Imaged from my home observatory in Gan-Yavne, Israel