Also, reaction speed should be downgraded. Dovakiin's current reaction time is based on the conclusion that the arrows from Auriel's bow make it into "outer space"
(or at least past the clouds) within the timeframe, making them 50,000 m/s
(or 3500 m/s), which would be Mach 147.06
(or Mach 10.3). However, this is reliant on the assumption that the world in TES is the same as the real world.
...But this assumption is incorrect.
"The planets are the gods and the planes of the gods, which is the same thing.
That they appear as spherical heavenly bodies is a visual phenomena caused by mortal mental stress. Since each plane(t) is an
infinite mass of infinite size, as yet surrounded by the Void of Oblivion, the mortal eye registers them as bubbles within a space.
Planets are magical and impossible. The eight planets correspond to the Eight Divines. They are all present on the Dwarven Orrery, along with the mortal planet, Nirn."
"The sky is another visual phenomenon caused by mortal mental stress, the night sky in particular.
The sky is as impossible as planets; in essence, when you look into the sky, 'you look outside the material plane'. At night, Nirn is surrounded by Oblivion.
The day sky is the multicolored elemental cloak of Magnus the sun. It changes colors as elemental influences rise and fall. Thus, when one looks at the day sky, they see into the raiments of Aetherius, and stare at magic."
"
Space is the interpretation of Oblivio, which is black and empty and surrounds the mortal plane.
Space is infinite, but it acts just like a planet, in that Oblivion is 'surrounded' by Aetherius. You can see Aetherius by the stars."
"
Magnus is the sun, the largest hole in Oblivio, and the gateway to magic. Magnus was present at the creation of the mortal plane, and, in fact, was its architect (Lorkhan was its advocate and inspiration). Prehistoric (before ME2500, startyear) Nirn was a magical place, and highly unstable to the first mortals. Magnus then left, some say in disgust, and Oblivion filled in the void with the Void. His escape was not easy, and tatters of Magnus remain in the firmament as stars."
TL;DR "shooting the sun" with Auriel's bow is an impossible feat to calculate.