Kazuo Kinoshita's calculation revealed that it passed extremely close
by Jupiter in 1974, and the perihelion distance reduced from 4.9
A.U. down to 1.5 A.U. It was discovered in 1978 when it came close to
the sun for the first time. It will pass near by Jupiter again in
2058, then the perihelion distance increases a bit up to 1.8 A.U.
The brightening before the perihelion passage is rapid. It reaches the
maximum brightness about 1 month before the perihelion passage. Then
it fades out rapidly for about 4 months. But after that, it turns to
be fading slowly.
The light curves were similar in 1990 and 2003. But in 1997, it became
brighter around the perihelion passage.