Cluster of stars

https://www.legacysurvey.org//viewer/?ra=80.1384&dec=-66.7781&layer=ls-dr10&zoom=12

Looks like a comet or a meteor, is this a moving groups with a tail like ram pressure stripping in miniature or something?

Can’t see anything special in GAIA proper motions on quick glance…

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There’s a known H II region there. My guess is that’s the culprit.

Yeah I something in SIMBAD in that area, but what (mechanism) causes the asymmetrical shape like that? Movement through the ISM, or just coincidence, or…?

Could be movement through the ISM. Could be an area that isn’t undergoing as much star formation so merely seems dimmer for that reason. Not entirely sure.

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