IC 1805 + Cosimo Secli + L-eXtreme

IC 1805

Credit: Cosimo Secli

Filters: Optolong L-eXtreme filter

 

IC 1805, also known as the Heart Nebula or W4, is a diffuse nebula associated with an open cluster, visible in the constellation Cassiopeia. It is a very extensive HII region, estimated to be 7,500 light years away from us and with a diameter of 230 light years; its main feature is the shape of two large, apparently empty areas of different sizes, which make the nebula resemble a “heart”. Inside it is a system of small, loosely concentrated open clusters, responsible for the ionisation of the nebula. The most notable of these is Melotte 15, which contains some stars about 50 times more massive than the Sun, plus other smaller ones and a microquasar ejected millions of years ago. 

 

 

 

 

Location: NOVOLI (LE)-ITALY 10.09.2023 Observatory: home terrace Sky bortle 9.
Mount: Skywatcher HEQ5 Synscan
Imaging telescope: Tecnosky 70/420 OWL- FPL 55 Triplet with 0.8x flattener
Guiding telescope: Tecnosky 70/400
Acquisition camera: ZWO ASI 294 MC-PRO
Guiding camera: ZWO ASI 224 MC
Filter: Optolong L-eXtreme
Exposures: 60 x 300s

Acquisition software: SHARPCAP
Autoguiding software: PHD2
Processing software: DSS - PIXINSIGHT - PS (Camera Raw)

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