We give a calculation of Picard groups Pic2 of K(2)‐local invertible spectra and Pic(MJX-tex-caligraphicscriptL2) of E(2)‐local invertible spectra, both at the prime 3. The main contribution of this paper is to calculate the subgroup κ2 of invertible spectra X with (E2)*X≅(E2)*S0 as twisted modules over the Morava stabilizer group G2.