# My estimate for the distance of the farthest Sun-size star that could be focused as a single-whole-star, by a 0.001''-precision telescope, is 30.53 light years. What is your estimate? Same, or different?

##### 1 Answer

If

This is an approximation to its chord length

# = 2(radius)tan(theta/2)

For the distance of a star approximated to a few significant (sd)

digits only in large distance units like light year or parsec, the

approximation (radius) X theta is OK.

So, the limit asked for is given by

( star distance )

So, star distance d = (star size)/

=(diameter of the Sun)/