Comet Okazaki–Levy–Rudenko, also known by its formal designation C/1989 Q1, is a hyperbolic comet that was barely visible to the naked eye from August 1989 to January 1990. It is also notable for having an orbit that is almost perpendicular to the ecliptic.
Physical characteristics Spectrophotometer measurements taken in October 1989 detected cyanogen (CN) and diatomic carbon () molecules emitting from the comet while it was from the Sun.
In December 1989, the comet produced two unusual features, a wedge-shaped coma and an antisolar jet. The high levels of polarization in the vicinity of the jet suggest the presence of dust particles that is relatively smaller than that was observed from Halley in 1986.
Its nucleus is estimated to be around in radius.
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