The orbit of a 1.1 ✕ 10¹⁰ kg comet around the Sun is elliptical, with an aphelion distance of 40.0 AU and perihelion distance of 0.890 AU. (Note: 1 AU = one astronomical unit = the average distance from the Sun to the Earth = 1.496 ✕ 10¹¹ m.)

(a) What is its orbital eccentricity?