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We present results of Mt Abu JHK photometric and HI Brackett $\gamma$ linemonitoring of the eruptive YSO V1647 Orionis (McNeil's Object) during theon-going outburst phase in 2008-2012. We discuss JHK colour patterns andextinction during the outburst and compare these with the previous outburstphase in 2004-05 and the intervening quiescent period of about 2 years.Commencing from early 2012, the object shows a slow fading out in all thebands. We report brightness variations in the nearby Herbig-Haro object HH22possibly associated with those in V1647 Ori. We also present modelling of thespectral energy distributions of V1647 Ori during its recent outburst andquiescent phases. The physical parameters of the protostar and itscircumstellar environment obtained from the modelling indicate markeddifferences in the two phases.

Near-Infrared Monitoring and Modelling of V1647 Ori in its On-going 2008-12 Outburst Phase