Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.

Using the Hipparcos catalog, I found the following V-band apparent magnitudes for each of the solar twins. I then used the difference in apparent magnitudes from the Sun to compute the distance of each star. 


                          Hipparcos catalog          distance (pc) based
       star              apparent V magnitude        on inverse square law
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       Sun                    -26.71 +/- 0.02          4.84813 x 10-6

     HD 78660                   8.34 +/- 0.02          49.6  +/-  0.9 

     HD 183658                  7.27 +/- 0.02          30.3  +/-  0.6 

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Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.