For me, the August 21 2017 eclipse-while within orb of Regulus- is almost right on the star al-Jabhah: regarding the influences of fixed stars, I follow the doctrine that the star which is closest (regarding longitude) to the planet, has the primary influence upon that planet. While Regulus is within 3 degrees orb, and will have some influence upon the eclipse, I believe that the much closer star al-Jabhah will have the primary influence; along with the star Algenubi, conjunct Mars in the eclipse chart, Mars having dominion over the eclipse because of its nearness to conjunction with the eclipse.