For stars that lie near the plane of the Milky Way and are within a few thousand parsecs of the Earth, extinction in the visual band of frequencies (photometric system) is roughly 1.8 magnitudes per kiloparsec.
Fal etrane wi ahanen samando ən adabara wan Tabarat tan amalan sund aɣ əd iyaɗ afdan ən parsectan Nakal, tenaɣe dǎɣ tamsudut tawanhayt dǎɣ alwaqan (tekanit tan photométrique) eqalan ihomiši 1,8 magnitude wan kiloparsec.