Well that depends on a lot of variables. One is temperature.

As you know, temp is variable with location and the time of

year. Therefore it is importance that you pick the location

and it variables. Also some of the physical may alter the

results. In particular Astronomical Unit 1.496 x 1011 meters

the Atomic Mass Constant 1.6605386x10-27 kg, mass of the

proton 1.67262171x10-27 kg, mass of the neutron

1.67492728x10-27 kg and mass of the electron 9.1093826x10-

31 kg. All these taken together along with the speed of

light 9.4605x1015 m and the parsec value 3.0857x1016 m

will determine the answer to your question.