  Spherical and aspherical models are presented for two outbursts in 2012 of
supernova 2009ip. Models are based on a scenario which suggests that the August
2012 outburst is caused by the explosive shell ejection from LBV-presupernova.
The model predicts an emergence of an unobserved outburst in late July 2012
related to a shock breakout and a subsequent diffusive radiative cooling of the
ejected envelope. The luminosity of the first observed outburst in August 2012
was presumably powered by the central source, whereas the second, more powerful
outburst in late September 2012, was caused by the ejecta interaction with the
circumstellar envelope. Models provide estimates of the ejecta energy and mass
along with the mass of the circumstellar shell.
