Based on Walker et al, (2018, Ap. J. 855, 128)
This page is set up to facilitate showing the movies on an iPad on a poster at the AAS in Jan. 2019.
M87 43 GHz VLBA 2007: Three week intervals, 11 epochs
M87 43 GHz VLBA 2008: One week intervals, 12 epochs
M87 43 GHz VLBA 1999-2016: Roughly annual, 17 epochs