Values of rf₂ as function of the spin period for one interior models inside the hach band of Fig. 6a. The estimated A_2, 0 is represented in vertical band and the horizontal line represents the actual spin period of Phoebe. This plot shows that the A_2, 0 value is consistent with rotation period between 9 to 9.75 h red band. The lightsalmon band represents variation of ±1 km used in the discussion (see main text).