Of the following comets, which did Helin co-discover?
117P/Helin–Roman–Alu
109P/Swift-Tuttle
67P/Churyumov-Gerasimenko
1P/Halley
Answer
117P/Helin–Roman–Alu, also known as comet Helin–Roman–Alu, is a periodic comet discovered in 2003 by Eleanor Helin, a renowned American astronomer, along with Roman Alu and Nicolae Roman. It is a Jupiter-family comet, characterized by its relatively short orbital period of approximately 8.6 years. This comet orbits within the inner solar system and is classified as a near-Earth object due to its close approach to our planet during its periodic returns.
Stargazing Pioneer: The Eleanor F. Helin Challenge
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