The orbit is almost circular, and the comet is always so faint,
fainter than 20 mag.
However, it brightened up to 14.7 mag in unusual outburst in 1989, and
it was discovered.
Kazuo Kinoshita's calculation revealed that it passed extremely close
by Jupiter in 1976, down to 0.012 A.U. It may have caused the outburst
in 1989. It will pass extremely close by Jupiter again in 2071, down
to 0.037 A.U.
Around the two great approaches to Jupiter, the comet rotates around
Jupiter for a while. But the perihelion distance or eccentricity does
not change so much, and the comet keeps always so faint, fainter than