Bicolour palette options for Angry Bee NGC 1769, 1763, N11 etc
Our angry bee (NGC 1769, NGC 1763 for eyes) is still lacking SII. Tomorrow night looks promising. But in the interim, just mucking around with Ha + OIII only. The things that tug on one when choosing a mapping:
- That it looks familiar and makes sense to a viewer used to Hubble Palette where Ha is mapped to green and OIII is mapped to blue
- That it doesn't look harsh and implausible to someone used to natural colour, where Ha would be red, OIII teal, and there might be some blue H-beta in there as well.
Personally, we both find attempts at a purely natural palette (Hydrogen magenta, OIII teal) very unpleasant, with echoes of butcher's apron, cryovac liver, and abdominal surgery gone wrong, so we'd like to avoid that.
Here are two possible solutions. The left hand thumbnail maps Ha to yellow (that is to say both its natural red and Hubble green), but OIII is mapped only to Hubble blue. That is legitimate scientifically, but looks pretty harsh.
The right hand thumbnail is "naturalized" just a tiny bit, by rotating the palette of the first image 15 degrees toward red (ie -15 deg in PhotoShop). That way, there is a nod toward Ha being red and OIII being more teal, and a half a nod toward H-beta. This is still valid scientifically because the original image can be recovered by rotating the palette 15 degrees clockwise with no information loss.
Given that "pure nature" is out, and "straight hubble" is out, since good SII can be hard to find, we'd love to know which of the two compromises you prefer.
Peter Ward might notice that there are three beautiful irridescent goldfish all riding on the bee's back. The middle of the three is very convincing.
Ha 8hrs, OIII 8hrs, 3nM in 1hr subs. Aspen CG16M on 20" PlaneWave. Field 36 min arc, North up.
There is little difference guys and any preference between the two will be semantic and purely personal, so I think you should run with the most scientifically valid.
The scene will likely be more interesting once you add the SII, so I look forward to that
Looking at my Sii subs (stacked and stretched) for this target area, i can tell there is infill background around the meandering filaments around the cocoons. You should be able to complete a tri-colour if you can get the data. I am working on my final Oiii run, subject to weather allowing completion.
There is little difference guys and any preference between the two will be semantic and purely personal, so I think you should run with the most scientifically valid.
The scene will likely be more interesting once you add the SII, so I look forward to that
Mike
Thanks Mike, that helps. Wishing it would either clear here or rain properly like it is just across the river, Mudgee way. We can see it.
Quote:
Originally Posted by glend
Looking at my Sii subs (stacked and stretched) for this target area, i can tell there is infill background around the meandering filaments around the cocoons. You should be able to complete a tri-colour if you can get the data. I am working on my final Oiii run, subject to weather allowing completion.
Thanks Mike, that helps. Wishing it would either clear here or rain properly like it is just across the river, Mudgee way. We can see it.
CFN is predicting a nice clear all-nighter around Canberra tomorrow night...so I'm planning on going into work late on Tuesday good luck (not bad software I hear..?..oh that's GoodLook, isn't it? ) your way too
Just an amazing image. I am still stunned by how much detail you got in this.
I have a lot of data myself on this but I don't think it will come too close to that much detail.
CFN is predicting a nice clear all-nighter around Canberra tomorrow night...so I'm planning on going into work late on Tuesday good luck (not bad software I hear..?..oh that's GoodLook, isn't it? ) your way too
Mike
And incredibly, it is clear all night tonight. Up we go in a few minutes. Best of luck your end too.
Quote:
Originally Posted by RickS
I prefer the look of the second "naturalized" palette, M&T.
Thanks, Rick. That helps.
Quote:
Originally Posted by SimmoW
Beautiful details here M&T. Probably dont like either colours so that must mean they are both scientifically correct! Maybe the second?
Hopefully it will look more interesting with a couple nights of SII, Simon.
Quote:
Originally Posted by gregbradley
Just an amazing image. I am still stunned by how much detail you got in this.
I have a lot of data myself on this but I don't think it will come too close to that much detail.
One of your best.
Thanks, Greg! That's very welcome encouragement.
Greg.
And incredibly, it is clear all night tonight. Up we go in a few minutes. Best of luck your end too.
Yep, great night so far..as predicted!...Sheesh, I can ooonly imagine what it must feel like to open your dome door and look up at your big forking beauty and reflect..."is that really ours?"..wow......
Thanks Suavi. Helpful. That's several votes for and none against.
Quote:
Originally Posted by strongmanmike
Yep, great night so far..as predicted!...Sheesh, I can ooonly imagine what it must feel like to open your dome door and look up at your big forking beauty and reflect..."is that really ours?"..wow......
Mike
We sit side by side at a desk to the right of the central pier. Trish sensibly sits well to the right. I sit where all 200 kgs of scope and forks would fall if a few bolts came loose. So I look up at the beauty and pray that it stays up there and not down here. In the pitch dark, loud unexpected noises from the dome don't help.
We got 6 hrs of SII last night. Looking promising but we're hoping for another 6 tomorrow. Adding more won't help with the stars (which are pretty bright compared with the nebulosity) but must help with background grit and zero point.
..oh that's GoodLook, isn't it? 
) your way too 
