IC1805_BiColour_2021-12-10_V3

I only managed 1 1/2 hours of Oiii due to clouds rolling in but as this was an unexpected clear night I can’t complain🤔 but I will as that’s what astronomers do....😁

 

This is my 2nd image testing out my Explore Scientific 0.7 focal reducer. Due to not being able to get correct back focus because of running out of inward travel on my focuser, I'm getting slight stars distortion in the bottom left and Right of the image.

I've have manage to correct some of this by copying the image, changing the blending mode of this layer and nudging left or right and up 1 or 2 pixels, as the error is only in the corners I masked out the rest of the image.

 

 

Note:

I removed all the stars after the initial processing using StarNet++ and then added the Ha stars back in at the end.

 

IC1805 also known as the “Heart Nebula” and is an emission nebula located in the constellation Cassiopeia. It’s is approximately 7500 Light Years from earth with an apparent magnitude of about 18.3 and apparent size of 150’x150’. Near the centre of the heart nebula is the cluster of stars known as Melotte 15 which contains many stars great then 50 times the suns mass

 

EQUIPMENT:-

Telescope Meade 6000 115mm and AZ-EQ6 GT

Explore Scientific 0.7 Focal Reducer

ZWO ASI1600mm-Cool cmos camera

Orion Mini Auto Guide

Astronomik 6nm Ha Filter (New)

Astronomik 6nm Oiii Filter

Chip Temp Cooled to -20 degC

 

IMAGING DETAILS:-

IC1805 California Nebula (Cassiopeia)

Melotte 15 Open Cluster

Gain 139 (Unit Gain)

Dithering

36 Ha subs@300 (3h)

18 Oiii subs@300sec (1h 30min)

Total imaging Time 4h 30min

20 Darks

25 Flats

 

PROCESSING/GUIDING SOFTWARE:-

APT "Astro Photograph Tools"

StarNet++

DSS

PS CS2

Done