Near Earth Object 2010 TD54 Accelerating

As near Earth object 2010 TD54 approached Earth its apparent motion across the sky increased. All exposures in this montage were 5" but as 2010 TD54 got closer it crossed more sky during each exposure, leaving a longer trail.

Universal Time, distance from Earth and apparent motion across the sky (given in arc seconds per minute) are given for each section.

C-14 @ f/5.5, ST-10XME, -10° & binned 3x3. 5" exposures through clear filter. FOV ~18' x 26'. North is up, east to the left.