At the discovery, it had been already discovered as an asteroid 1992
YF5, about 1 year before discovered as a comet in 1993. It had been
bright as 17 mag for about 2 years before the perihelion passage in
1994 September. However, the final observation was in 1995 February
just after the perihelion passage. It had never been observed after
that in spite of the good condition. It was so faint as 21 mag at the
final observation, although it was nuclear magnitude.
In the next apparition in 2008, it had been recovered about 3 years
before the perihelion passage, then it was already bright as 18 mag.
It was observed bright as 16.5-17 mag around one year and a half
before the perihelion passage (late 2006 to early 2007). However, it
was observed so faint as around 19 mag in 2007 autumn when only half a
year prior to the perihelion passage.
The abnormal light curves in 1994 and 2008 apparitions coincide very
well. Therefore, this comet may tend to fade out before the perihelion
passage, with a strongly asymmetric light curve to the perihelion,
although it is a very distant comet with a perihelion distance of 4.2