Table:
text: Historical brightest stars
Jocelyn Tomkin's 1998 list of the brightest star in Earth's night sky at each period within the last or next 5 million years
Jocelyn Tomkin's 1998 list of the brightest star in Earth's night sky at each period within the last or next 5 million years
Star Start_year End_year Maximum_year Maximum_magnitude Distance_at_maximum_LY Current_distance Current_magnitude_
Epsilon Canis Majoris ... -4460000 -4700000 -3.99 34 430 1.50
Beta Canis Majoris -4460000 -3700000 -4420000 -3.65 37 500 1.99
Canopus (first time) -3700000 -1370000 -3110000 -1.86 177 310 -0.72
Zeta Sagittarii -1370000 -1080000 -1200000 -2.74 8 89.1 2.60
Zeta Leporis -1080000 -950000 -1050000 -2.05 5.3 70 3.55
Canopus (second time) -950000 -420000 -950000 -1.09 252 310 -0.72
Aldebaran -420000 -210000 -320000 -1.54 21.5 65 0.85
Capella -210000 -160000 -240000 -0.82 27.9 42.2 0.08
Canopus (third time) -160000 -90000 -160000 -0.70 302 310 -0.72
Sirius (current) -90000 +210,000 +60,000 -1.64 7.8 8.6 -1.46

Question: How much farther -lrb- in ly -rrb- is Epsilon Canis Major than Zeta Sagittarius among the brightest stars in history?