Comet?

https://www.legacysurvey.org//viewer/?ra=19.8915&dec=0.1217&layer=hsc-dr2&zoom=11
Seems to be a reflection artifact on the sensor but the tail is so long that it leads me to believe this could actually be a comet. Thoughts?

yes, I think so, anyone know its name

If anyone can get me the mjd of the single exposure it appears in, I can look it up. I cant remember how to get that data from HSC.