by Ann » Tue Jun 04, 2024 4:19 am
Chris Peterson wrote: ↑Mon Jun 03, 2024 6:32 pm
I don't think there are any tidal tails here. We're just seeing the foreground galactic cirrus.
I must say I don't like this image, other than the interesting wide view capturing the foreground dust.
I've seen quite a lot of images lately that end up with these bizarre orange colors. Maybe the problem here was just too many scopes and cameras, but the color is weird and I don't think it's accurately capturing what's going on in the galaxy itself. I shot this recently, and comparing it to numerous other images as well as HST shots, I think it gives a much better view of the continuum galaxy and the H II regions. (And I don't think [O III] really adds anything to most galaxy images).
_
I must agree with you, Chris, at least partly. Many years ago I spent a lot of time at a 14-inch telescope just looking at stars to try to assess their color. Hardly any stars were as orange as the center of NGC 2403 in this APOD. Betelgeuse, the way I remember it, was about this color,
███. Mu Cephei, the Garnet Star, was a sort of pale copper,
███, but even that star was not quite as orange as the center of NGC 2403 in today's APOD. Only a few carbon stars were that orange - in fact, they were a lot redder,
███!
I'd say that the center of NGC 2403 in today's APOD is about this color,
███. But then there are a lot of pink Hα regions almost superimposed on the core. I found it hard to find a good match for the color of the Hα regions, but maybe their color was like this,
███, or like this,
███. Together, this creates a vibrant and - I must admit that I think so - a very pleasant color!
Ann
[quote="Chris Peterson" post_id=339450 time=1717439553 user_id=117706]
I don't think there are any tidal tails here. We're just seeing the foreground galactic cirrus.
I must say I don't like this image, other than the interesting wide view capturing the foreground dust. [b][color=#FF8040][size=110]I've seen quite a lot of images lately that end up with these bizarre orange colors.[/size][/color][/b] Maybe the problem here was just too many scopes and cameras, but the color is weird and I don't think it's accurately capturing what's going on in the galaxy itself. I shot this recently, and comparing it to numerous other images as well as HST shots, I think it gives a much better view of the continuum galaxy and the H II regions. (And I don't think [O III] really adds anything to most galaxy images).
_
[img2]https://asterisk.apod.com/download/file.php?id=49785&t=1[/img2]
[/quote]
[float=right][img3=""]https://apod.nasa.gov/apod/image/2405/NGC2403-LRGB+Ha+Oiii-v25-f1024.jpg[/img3][/float]I must agree with you, Chris, at least partly. Many years ago I spent a lot of time at a 14-inch telescope just looking at stars to try to assess their color. Hardly any stars were as orange as the center of NGC 2403 in this APOD. Betelgeuse, the way I remember it, was about this color, [color=#ffe135]███[/color]. Mu Cephei, the Garnet Star, was a sort of pale copper, [color=#f6cba0]███[/color], but even that star was not quite as orange as the center of NGC 2403 in today's APOD. Only a few carbon stars were that orange - in fact, they were a lot redder, [color=#ef5327]███[/color]!
I'd say that the center of NGC 2403 in today's APOD is about this color, [color=#f8d568]███[/color]. But then there are a lot of pink Hα regions almost superimposed on the core. I found it hard to find a good match for the color of the Hα regions, but maybe their color was like this, [color=#E4717A]███[/color], or like this, [color=#FCA3B7]███[/color]. Together, this creates a vibrant and - I must admit that I think so - a very pleasant color! :oops:
Ann