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C/1989 Y2 (McKenzie–Russell)

Hyperbolic comet From Wikipedia, the free encyclopedia

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Comet McKenzie–Russell, formally designated as C/1989 Y2, is a hyperbolic comet that was discovered by Australian astronomers, Patricia McKenzie and Kenneth S. Russell on December 1989.

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Discovery and observations

Robert H. McNaught reported the discovery of a new comet that Patricia McKenzie found on photographic plates that Kenneth S. Russell took on 21 December 1989.[1] Prediscovery images from Japan were taken in 19 December 1989 but went unnoticed until the next year.[4] Orbital calculations of the comet revealed it was already on its outbound flight as it had reached perihelion a month before discovery, and as a result it continued to fade away in the following days.[5] It was last observed on 24 January 1990.[6]

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References

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