We present the photometry and spectroscopy of SN 2015an , a Type II Supernova ( SN ) in IC 2367 .
The recombination phase of the SN lasts up to \sim 120 d , with a decline rate of 1.24 mag/100d , higher than the typical SNe IIP .
The SN exhibits bluer colours than most SNe II , indicating higher ejecta temperatures .
The absolute V -band magnitude of SN 2015an at 50 d is - 16.83 \pm 0.04 mag , pretty typical for SNe II .
However , the ^ { 56 } Ni mass yield , estimated from the tail V -band light curve to be 0.021 \pm 0.010 M _ { \odot } , is comparatively low .
The spectral properties of SN 2015an are atypical , with low H \alpha expansion velocity and presence of high velocity component of H \alpha at early phases .
Moreover , the continuum exhibits excess blue flux up to \sim 50 d , which is interpreted as a progenitor metallicity effect .
The high velocity feature indicates ejecta-circumstellar material interaction at early phases .
The semi-analytical modelling of the bolometric light curve yields a total ejected mass of \sim 12 M _ { \odot } , a pre-supernova radius of \sim 388 R _ { \odot } and explosion energy of \sim 1.8 foe .