The Heart Nebula (IC 1805, left) and Soul Nebula (right) are emission nebulae in the constellation of Cassiopeia at a distance of c. 7,500 light years.
Acquisition: William Optics GT81, WO Flat 6AIII 0.8x reducer, ZWO ASI1600MM-Cool, Atik EFW2, Astronomik Ha, OIII, SII 1.25″
Mount/Guiding: Orion ST80, QHY 5, PHD2, Sky-Watcher NEQ6, EQMod, Sequence Generator Pro
Processing: PixInsight 1.8
Dates: Dec. 30th 2019 to Apr. 4th 2020
Lights: Four Panel Mosaic, each with Ha 26 x 300s, OIII 30 x 300s, SII 32 x 30s, Unity Gain, -15C, Total Exposure 28.42 hours
Flats: 25 – 30 per filter per panel across multiple sessions