Second attempt at the Flaming Star and surroundings

[michael.h.f.wilkinson]

Yesterday was very clear indeed, and I made the most of it by grabbing a lot of narrowband data, primarily S-II, which had been cut short by clouds to just 18 minutes previously. I grabbed 2 hours 12 minutes of S-II, and another hour of H-alpha and O-III each, bringing up the totals to 2.5 hours, 2 hours and 2 hours for the three bands respectively. Although the S-II band now does show some nebulosity, it is still completely overwhelmed by H-alpha, so SHO doesn't work that well

Trying to stretch S-II introduces way too much noise, so I will have to get more S-II data (Thursday, maybe)

HOO is the next to try:

This works quite well, and is clearly better than my first attempt (with half the data)

Finally, I had a go at HOS, and I must say, I find it quite appealing:

With any luck, I can get lots more S-II data on Thursday and Friday (aiming for an additional 4 hours), and I will also try to get an additional hour of O-III and H-alpha, it time allows

[michael.h.f.wilkinson]

Here are the constituent monochrome images

H-alpha

O-III

S-II

The H-alpha really blows the others out of the water

[MartinB]

That's a great demo of the way NB does and doesn't work Michael.  HaRGB is much better for the flame, and will pull out the blue reflection but the "tadpoles" works pretty well with the hubble palate even though, as usual, the SII is very weak.

[michael.h.f.wilkinson]

8 hours ago, MartinB said:

That's a great demo of the way NB does and doesn't work Michael.  HaRGB is much better for the flame, and will pull out the blue reflection but the "tadpoles" works pretty well with the hubble palate even though, as usual, the SII is very weak.

Will try to get RGB later, perhaps with the ASI183MC