NGC6888 Crescent Nebula in Halpha + "new" discovery

[Grinde]

Hi!

3 days after the astronomical darkness ended (N63°) , I managed to capture this in H-alpha, even though the sky wasn't pitch black. A typical autumn-target, but I managed to grab it just as it was rising in the east. I'm suprised that the data came out nicely for over three hours without getting affected by the setting/rising sun.

Now to the fun part, I thought I had discovered a new nebula when examining the stack, a very small & very faint bubble in the lower left corner! First I cursed my flats for getting too old, but realised it was actually nebulosity on the screen, not dust-donuts. Hooray! But after some research online, I discovered that my discovery was already discovered. It was the "PN G75.5+1.7 soap bubble nebula", discovered 2008, that's pretty recent! But since I never heard about it before, it was still a exciting new discovery for me, I'm super-stoked about grabbing it with just a 4" ota very low on the horizon without astronomical darkness.

Ha: 10*20min unguided

Takahashi FSQ106EDX

QSI 583wsg

10Micron GM2000 HPS

Here's the location of the elusive bubble

Click image for slightly bigger version

Click image for the 100% version

Thanks for looking!

Jonas

[NickK]

Nice - if only I could persuade Sandrine that a HPS was more important!

This is why, to me, it's good fun to investigate the images you take!

[Keiran]

Lovely image Jonas, looks great in Ha, and that little soap neb id amazing.... I bet you are really chuffed with that. I kind of did discover it, as you didnt know it was there (to be truthfull i had no idea it was there either). I wonder if it has ever been imaged on SGL before???

Again congrats on a great image

Keiran

[Sam]

Wow, that's a fantastic image especially with the surprise soap bubble!

[martin_h]

I wonder if it has ever been imaged on SGL before???

Yep...

[Quatermass]

That must have been a great moment for you its great discovering new stuff up there brilliant job.

[Gina]

That's fantastic! - well done

[foundaplanet]

Neat image..

[Tom OD]

Excellent pic Jonas,

That soap bubble is very dim, but I think it responds to O3 ok as well as the Ha. Olly took a pic of it a while ago, maybe its in the archives. As you say 2008 is not that long ago. It shows how deep we are going now with our deep space images.

Tom.