This closeup on the center of the large Heart nebula shows the central structure composed mainly of Hydrogen (Red-Yellow) along with lots of Oxygen (Blue).

Imaged over several nights in October-December 2016
S2-Ha-O3 mapped as RGB
RGB for the star colors

Ha - 53X600sec
O3,S2 - 10X600 sec each
RGB - 30 min each

Total about 14 HRS

All images at Bih 2 = 0.89" per pixel (so 14 hrs at bin 2 equals 56 hrs in bin 1...)

C14 equipped with Starizona SCT corrector (operating at F7.2)
ASA DDM60 - no guiding :)
Imaged from my home in Gan-Yavne ISRAEL