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Star Dust  and no stars, 



    
        

            Rich Sky

Star Dust and no stars

Technical card


Basic astrometry details

Astrometry.net job: 4215401


Resolution: 2254x3012

Locations: Black Dog Observatory, Canada, Canada

Data source: Backyard

Description

Dust between IC5070 and NGC7000 has been processed for star removal.
My first attempt at star removal, so emphasis can be on the details of the nebula.

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If you use startools, here is what I did:
Create mask for large stars:
Select module 'Heal' and these are the selected options:
1- New must be darker -> 50%
2- Grow mask -> 10 pix
3- Quality -> started with medium, until correct parameters were selected and then 'Ultra'
4- Neighbourhood -> 35 pixels (reduce this parameter if you want the details closer to the star)
5- Neighbourhood Samples -> 19 pixels
6- New darker than Old -> 'No'
7- Saved resulting image

I repeated steps 1 to 7 with a small star mask reducing the parameters by a lot, as the stars were much smaller.

Learning: For RASA equipment use 'Heal' module to remove 'offending star hallow' created by f2/highspeed RASA

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