Interesting Diffuse green object

http://legacysurvey.org/viewer?ra=186.5738&dec=0.5871&zoom=16&layer=decals-dr7

Is this an artefact or real diffuse object? Looking more like comet, but I can’t check the single image cutouts at the moment. Not working here.

Weird. JPL thinks it might be a main belt asteroid, but it looks like a comet.
Maybe the image is fuzzy after being stacked with other images.
It isn’t so fuzzy in the single image
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=59204
1999 BF9** = 2001 QT145

https://c.legacysurvey.org/viewer/exposure_panels/decals-dr7/635971/N28/?ra=186.5738&dec=0.5870&size=100

CCD decam r 635971 N28, 125.0 sec (x,y ~ 270,1248)
(decam/CP/V4.1/CP20170331/c4d_170401_041951_ooi_r_v1.fits.fz [59])
(observed 2017-04-01 @ 04:16:56.559349 = MJD 57844.178432)

https://www.legacysurvey.org/viewer/exposures/?ra=186.5738&dec=0.5870&layer=decals-dr7https://c.legacysurvey.org/viewer/exposure_panels/decals-dr7/635971/N28/?ra=186.5738&dec=0.5870&size=100