Interesting object~ what are these 2 doing?

https://www.legacysurvey.org//viewer/?ra=183.2500&dec=18.0937&layer=ls-dr9&zoom=16

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Binary star system?

I dunno, no spectrum and nothing in SIMBAD :confused:

Yep, definitely a binary system. The gaia parallaxes are a little wonky, but the proper motions are almost identical.

Yeah I guess so, I’ve learned to distrust very low proper motions from the BYW:P9 project

Gaia’s actually pretty good as proper motion measurements, even at low PMs.

What are the error margins at ~ 0.2 mas/yr?

I dont understand the question.