Observation of asteroid (373383) 2012 TO307 while attempting comet 59p recovery.
In the same images of comet 59p I found this faint asteroid near the edge of the field.
Observation date : 2017 10.08.9999, Filter CBB, 300s exposures 0.3m SCT KAF3200ME , 0.83"/px
Here you can see the confirmation blink.
We can see the asteroid isn't in the predicted position (red spquare) but still very close.