Here is the companion "blink" video from the "M105 and Leo Neighbourhood" Image, showing an asteroid crossing in front of the galaxy.
From my own questionable research, I believe the asteroid is 5116 Korsor, but it may also be FX231 or something again. It was moving along the ecliptic so I don't believe it is alien.
From the travel and imaging time, I was able to workout it angular velocity (1.3E-3 rad/hr) and orbital period 5.5 yrs. From its distance from the sun (500E9? m (somewhere between Mars and Jupiter) its true velocity of 66,000 km/hr - about 1000 x the speed limit on urban avenues.
I hope the video works on zenfolio...