NGC6888_Bi-Colour_StarLess_21-6-18_v2

***STARLESS VERSION OF NGC6888***

 

Well this is my third re-processed image from date obtained back in 2018. I wanted to try something that was really going to stretch StarNet++ to see how good it was at distinguishing between stars and nebula remnants and I must say it worked very well with only minimal remedial work required. I also realised in my humble opinion that my processing has improved in the last 3 years. Maybe I need to revisit all my old images...

 

Object Description:-

NGC 6888 the Crescent Nebula is in the constellation of Cygnus and approximate 5,000 ly from earth with a visual mag of 7.4. It structure is formed by the star shedding its outer layer in a strong stellar wind interacting with slower moving material shed at an earlier time. The star is at the end of its stellar life and will eventually result in a Supernova.

 

EQUIPMENT:-

Telescope Meade 6000 115mm and AZ-EQ6 GT

ZWO ASI1600mm-Cool cmos camera

Orion Mini Auto Guide

Astronomik 12nm Ha Filter

Astronomik 6nm Oiii Filter

Chip Temp Cooled to -20 degC

 

IMAGING DETAILS:-

NGC 6888 Crescent Nebula (Cygnus)

Gain 139 (Unit Gain)

33 Ha subs@300sec (2h 45m)

24 Oiii subs@300sec (2h)

Total imaging Time 4.45h

Dithering

20 Darks

20 Flats

 

PROCESSING/GUIDING SOFTWARE:-

APT "Astro Photograph Tools"

DSS

PS CS2

Done