It comes close to the Sun at the perihelion passage, with a distance
of 0.5-0.6 A.U. But the brightening and fading is rapid even around
the perihelion passage.
The light curve is strongly asymmetric to the perihelion passage.
Before the perihelion passage, the brightness evolution is extremely
rapid along a 30 log r formula, and the comet becomes bright in a
short time. After the perihelion passage, the fading is along a 15 log
r formula, somewhat slower than the brightening.
Kazuo Kinoshita's calculation revealed that it passes near by Earth
and Jupiter frequently, but the shape of the orbit does not change so
Kazuo Kinoshita's calculation revealed that it will pass only within
0.1 A.U. from the Earth in 2011 August and 2017 February. The
approaches will happen about 1 month and a half after the perihelion
passage. So the comet will be diffuse but very bright.