Here is the Heart Nebula in Ha / OIII with RGB stars. The composition had to be "tight in" on the Heart with my imaging FOV. This is a strong star forming region with many young stellar objects mixed in with the dust and gas. Within this Heart Nebula region are several LBN's, LDN's and star clusters - the most notable are shown in the annotated image. The more well known star cluster is IC 1805, additionally there are Czernik 10, Berkeley 65, and Tombaugh 4, star clusters.
The processing of the low surface brightness parts of the Heart were processed in a starless mode. Stars are a low stretch of RGB data. I am getting used to PI's pixel math - I have refined the narrow band Ha and OIII pixel math combination so that I can get the color mapping and color tone finely tweaked with the setting of a few pixel math constants. The starless narrow band image and RGB stars combination is also tweak-able with a few pixel math constants so that neither star color or starless nebula colors impact one another.
Image and details are accessed from the link below (or by clicking on the thumbnail). The annotated image can be linked from the main image page but I have also provided a link below for convenience. The full resolution image (2.4 arcsec/pix) can be accessed from the image webpage.
Heart Nebula Sh-190 IC1805 Annotated
Scope: FSQ-106N at f/5 (530 mm FL)
Camera: Atik 383L (Astronomik Gen 2 Ha OIII LRGB Filters)