Cold molecular gas and dust form the cone shape in front of Ha-emitting nebula NGC2264. The bright star S Monocerotis on the top of the image radiates the energy to excite the nebula.
Telescope: ASA 10N-OK3 f3.6
Mount: ASA DDM 85
Camera: FLI ML8300
Filter-wheel: FLI CW 2-7
Filter: Astrodon Ha, OIII(5nm), LRGB
Exposure: Ha:29x600sec, Ha:17x600sec RGB:4x300sec each channel
Programs: Maxim DL 5.0, CCDStack 2.8, PixInsight SE 1.8
full exif