  We reported the monitoring results on spectrophotometry, photometry and
imaging of comet 103P/Hartley 2 obtained at Lulin (1m), Calar Alto (2.2m) and
Beijing Astronomical (2.16m) Observatory from April to December 2010. We found
that a dust feature at sunward direction was detected starting from the end of
September until the beginning of December (our last observation from the Lulin
and Calar Alto observatory). Two distinct sunward jet features in the processed
images were observed on October 11 and after October 29 until November 2. In
parallel, the CN images reveal two asymmetrical jet features which are nearly
perpendicular to the Sun-nucleus direction and this asymmetrical features
implies that the comet was in a nearly side-on view in late-October and
early-November. Additional to the jet features, the average result of the
C2-to-CN production rate ratio ranges from 0.7 to 1.5 which places 103P/Hartley
2 as being of typical cometary chemistry. We found that the $r_h$ dependence
for the dust production rate, Afrho (5,000 km), is -3.75+-0.45 before
perihelion and is -3.44 +-1.20 during post-perihelion period. We detected the
higher dust reddening is around the optocenter and getting bluer outward along
the sunward jet feature and concluded that the former one, higher dust
reddening, could be associated with strong jet activity and the latter one, the
lowering of the reddening, might imply the optical properties changed or could
be associated with outburst. The average dust color did not appear to vary
significantly as the comet passed through perihelion.
