We present a method for obtaining the inteuclear separation of diatomic molecular ion H2+ irradiated by attosecond-duration laser pulse, by computing the probability flux of wavefunction patte of photoelectron in configuration space. In contrast to earlier means of attosecond-scale time-gating or taking ratio of image data in momentum space, our alteative is characterized by experimental feasibility. The numerical results of a reduced dimensionality model on hydrogenic ions corroborated our method are obtained and can be generalized to more complex molecular systems for inferring bond length or bond angle information.