Photobombing of NGC 3384 by Asteroid
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...