Question 1077720
Not knowing when those 73 days occur,
we can give only an approximate average,
but it does not matter because we are not astrophysicists,
expected to know the exact period of Earth
(about 365.25 days, but variable), and
according to Kepler's laws of planetary motion, in equal times
that line sweeps equal area sectors of Earth's elliptical orbit (not equal angles).
For math class purposes (but don't say that to your space science teacher),
Earth does one turn, {{{2pi}}}{{{radians}}} , around the sun in {{{365days}}} ,
at a constant angular velocity of.
{{{2pi/365}}} radians per day.
In {{{73 days}}}, the angle swept would be
{{{2pi*73/365}}}{{{radians=0.4pi}}}{{{radians=about1.257}}}{{{radians}}} .