Celestial hemisphere:  Southern  ·  Constellation: Scutum (Sct)  ·  Contains:  HD169033  ·  NGC 6625
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The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO, Logan Carpenter
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The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO

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The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO, Logan Carpenter
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The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO

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So I'm at it again, naming obscure targets 

A while ago I was talking with Chester Hall-Fernandez after we did a collaboration (image yet to be published) and, knowing I had the Meade 10",  he mentioned that there was a bubble  not far from the Eagle nebula that was a known bubble but images of it were hard to find. 
It is located near the open cluster NGC6625. The bubble is extremely faint in a 20min sub, slightly more obvious in the Ha compared to the OIII but present in both.
I could not find much about this bubble at all other than it seemed to be mentioned as a "bubble" in the Simbad catalogue with the identifier [SPK2012] MWP1G019151+006651 when searching up the star in the middle of the bubble, BD-11 4620,  but no further info appears to be available that I could find.

 I found the following image  in a discussion page of the Milky Way Project talking about the possible nature of this "bubble" from back in 2017 where it sounded like the bubble had not been confirmed to be directly as a result of the central O type star BD-11 4620.
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I plate solved and annotated my image in Pixinsight and the star at the center of the bubble in my image matched the co-ordinates for BD-11 4620.
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As already mentioned, Simbad seemed to only briefly mention this as a "bubble"
Briefly reading a paper entitled "The Milky Way Project second data release: bubbles and bow shocks", it states that massive O and early B-type stars have strong stellar winds and/or radiation pressure which is responsible for the production of these bubbles. The star BD-11 4620 seen in the central part of the bubble is known to be an O5 type star and these O5 stars vary from 15 to 90x the mass of our sun. I have seen BD-11 4620 described as being 15x the mass of our sun so I am unsure if it is of sufficient size to produce such a bubble.

The Bubble itself seems to be composed of two relatively distinct "shells" in my image and(at least to my eyes) looked like an ear lobe, listening to the sounds of the Universe .

If anyone has any further information about this bubble, I would be keen to know so I can learn more about this target.

My image is HOO with RGB stars.
Also present towards the top of the image is a small coffee bean shaped planetary nebula which I presume is PN G019.1+00.8

Edit : Following a couple of comments about how it might look oriented vertically and that the bubble looked like and eye (thanks Tom), I decided that a vertical orientation looked more pleasing to the eye and now started to look like a crocodile' eye, which I though was a better fit (yes I know there is a Croc's Eye Galaxy but surely it can share   )

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  • The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO, Logan Carpenter
    Original
  • The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO, Logan Carpenter
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    The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO, Logan Carpenter
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The Croc Eye Bubble (Bubble and O5 Type star BD-11 4620) in HOO, Logan Carpenter