Melotte 15 is the the open cluster at the centre of the Heart Nebula, Sharpless 2-190, in Cassiopeia. Captured with our shared scope at SRO in California during Sep-Dec 2014 and processed in a heavily modified Hubble palette. This is a small crop of the larger field.

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Focuser: Atlas
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel (drizzled 2x)
Exposures: 17x1800s Ha, 20x1800s Oiii, 24x1800s Sii (30.5 hours)
Processing: PixInsight 1.8

Acquisition credit: John Kasianowicz, Daniele Malleo, Leonardo Orazi, Rob Pfile, Rick Stevenson and Jerry Yesavage.
Processing credit: Rick Stevenson

via Flickr http://flic.kr/p/DgH6Fa