PanSTARRS 1 discovered a 21st magnitude asteroid in images taken with the 1.8m Ritchey-Chretien on 14 March 2015. The asteroid was classified as an Amor type NEO, but in a near parabolic orbit. Observations during the winter of 2015/16 showed that the object had cometary features and it was re-designated as a comet on 1 February 2016. Date10x10 magErrorKphot magComa '04-Feb-1617.91 0.0217.70.207-Feb-1617.86 0.0317.50.205-Mar-1617.150.0315.70.229-Mar-1616.900.0216.70.212-Apr-1616.750.0116.50.201-May-1616.820.0216.00.211-May-1616.770.0116.30.230-May-1616.650.0114.80.209-Jan-1714.480.0411.60.927-Jan-1714.110.0211.70.901-Feb-1713.880.0510.71.206-Feb-1714.030.0311.01.123-Feb-1713.640.0511.40.607-Mar-1713.220.0310.10.716-Mar-1712.940.039.71.820-Mar-1712.800.039.61.729-Mar-1712.490.029.23.302-Apr-1712.460.048.83.510-Apr-1711.050.017.36.314-Apr-1711.270.017.56.418-Apr-1711.140.057.25.123-Apr-1711.540.038.05.803-May-1711.880.037.95.507-May-1711.820.027.34.913-May-1711.870.097.73.126-May-1712.270.039.12.413-Jun-1712.900.0410.43.726-Jun-1713.530.019.63.103-Jul-1713.700.0110.42.813-Jul-1714.100.0210.92.020-Jul-1714.120.0410.92.924-Jul-1714.060.0410.93.030-Jul-1714.640.0211.21.804-Aug-1714.680.0211.51.417-Aug-1714.880.0311.81.319-Aug-1714.900.0411.81.429-Aug-1715.170.0611.81.514-Sep-1715.450.0112.90.822-Sep-1715.450.0112.81.001-Oct-1715.570.0312.60.912-Oct-1715.450.0312.20.817-Oct-1715.600.0113.50.821-Oct-1715.510.0412.50.930-Oct-1715.570.0113.40.914-Nov-1715.670.0213.40.828-Nov-1716.060.0113.10.614-Dec-1716.590.0314.10.902-Jan-1817.090.0314.30.614-Jan-1817.400.0615.40.521-Jan-1817.570.0216.10.502-Feb-1817.950.0516.50.4