# Kilometers to Parsecs

vCalc Reviewed
PC =
Tags:
Rating
Copied from
ID
vCalc.Kilometers to Parsecs
UUID
0331f2d9-1c0c-11e8-abb7-bc764e2038f2

The Kilometers to Parsecscalculator converts a measurement of length in kilometers to parsecs.

INSTRUCTIONS: Choose units and enter the following:

• (km)  This is the distance in kilometers

Parsec(PC):  The calculator returns the distance in parsecs.  However, this can be automatically converted to other units via the pull-down menu.

#### The Math / Science

A parsec was traditionally defined as the distance where one astronomical unit subtends an angle of one arcsecond.  A parsec was redefined in 2015 to 648000/π astronomical units.  Proxima Centauri, is the nearest star to the Sun and is approximately 1.3 parsecs (4.2 light-years) from the Sun.

Parsecs are often used in astronomy calculations is a simple linear transform.