Stop Wasting Your Time Shooting RGB Stars: Perfect Narrowband Stars in PixInsight - Quick & Easy!

[@rtpman1953]

Thanks. The best method I've seen for getting RGB stars from NB.

[@victortellez7045]

Fascinating ! The best method I have used so far, thank you !

[@setiv2]

Since that video I made a stand alone NBtoRGBstars script that is even better than the Foraxx script. kzbin.info/www/bejne/e4uucnltftl9j6M

[@Abaris42]

Awesome! Going to try this with my next lot of data. Thanks for sharing!

[@dubbleOHnegative]

This is awesome for those of us with very limited time to shoot! Thanks!!

[@nikaxstrophotography]

I've been doing this for a while now it works a treat!

[@stephenjonesbodon]

Informative video. Thank You

[@georgalbrecht8029]

I started a while back combining the stars as HSO with background neutralization plus SPCC getting good results. I will give a try with this one. Thanks

[@setiv2]

I have been able to use spcc sometimes with ok results too. The annoying thing for me is if you crop and then you forget to imagesolve. SPCC will fail a lot with a very large number of stars too. For instance, the image I use as an example in my video failed spcc (it detected 26,000 stars).

[@setiv2]

Foraxx script works every time and is fast.

[@TheMje1963]

I'll have to give this a try. I've use the Foraxx Palette in the past and have never liked the results. But just for stars I should give this a try

[@setiv2]

I have only had 2 objects look good in the palette, but use it every time for stars! Just like my example on the california, the foraxx palette was UGLY! Perfect stars though :)

[@SpaceCityAstro]

The preview doesn't work - any tips to get it working?

[@setiv2]

Email me what you are seeing. [e-mail]

[@lostsensemusic]

Is there a way for osc images with Duo Narrowband filter?

[@setiv2]

Yes! Split your RGB channels. Assign the Red to H-alpha, then either assign Green or Blue to OIII or average Green and Blue and call that new image OIII

[@lostsensemusic]

@@setiv2 oh of course thank you! How didn’t I have thought of that

[@captaincook6666]

can I ask a question about gradient correction in PI. I am finding that all of DBE/ABE/new grad corr leaves a weird banding in the background in my Ha images- I have had to go back to Siril background extraction (with dither selected) which works best. Any advice on getting same result in PI?

[@setiv2]

I think you know how I feel about their new gradientcorrection tool. Can you email me an example, if you can share a masterlight that would be even better? Have you had any success with graxpert? [e-mail]

[@ssbhide123]

Whats the pixelmath behind Foraxx palette?

[@setiv2]

For the stars or for the starless? For the stars I made my own standalone script that I can speak to but detailed questions on whats under the hood in the ForaxxPaletteUtility you will have to direct those to the creator of that script PaulymanAstro

[@ssbhide123]

@@setiv2 oh are those expressions different for stars and starless? I thought they were the same. Your narrowband stars video intrigued me. I don't yet have Pixinsight but Siril has pixelmath and I wanted to see if I can get similar results for the stars.

[@setiv2]

Gotcha yeah, for stars put Ha in red and OIII in blue. For green do 0.3*Ha+0.7*OIII. If you have sii as well for Red do 0.5*Ha+0.5*SII

[@ssbhide123]

@@setiv2 Thanks!! I have an HaOiii filter so I will try the first expression.. btw are you adding 0.3*Ha to green channel to mimic the H beta emission or you just found out that by trial and error which gives close to RGB star colour?

[@setiv2]

@@ssbhide123 no it isnt mimicing hbeta. It is an oldschool way of making a synthetic green channel from bicolor data. So instead of doing an HOO image you would use that 0.3*Ha+0.7*OIII to create a synthetic green channel.

[@captaincook6666]

where can you get the script- the link just says not available.

[@setiv2]

That is the repository link. Copy and paste that link to your repository manager in pixinsight

[@captaincook6666]

@@setiv2 ok thanks

[@AmatureAstronomer]

Interesting.

[@Mr77pro]

Great video and tip! Do you have to generate the foraxx image even if you only need the stars?

[@setiv2]

I think so. I dont see an option to turn it off. The script is fast, so it really doesnt matter a whole lot. Also I have found i have used the generated palette and masks for processing even if I was going to use a different palette. Like, if I like how it made some core of a nebula look and would end up averaging the foraxx core into my image.

[@Mr77pro]

Makes sense. I've used it as a starting point as well...haven't had too many images where I was loving the raw foraxx. Try putting the foraxx into Bills NBnormalization😉

[@Mr77pro]

I guess if you really didn't want it you could just not assign images to it...??

[@setiv2]

The script yells at you if you leave them blank. Foraxx doesnt work for all nebula but when it does it works realllyyyy well. Here is my favorite foraxx image I did. astrob.in/tymdsf/0/

[@Mr77pro]

@@setiv2Good to know! Looks great! Yeah, Paulymans fighting dragons really showcase the foraxx as well