31. See List of periodic comets . talk ) 21 : 18, 30 November 2012 ( UTC) 32. In October 2012, Vorobjov discovered 276P / Vorobjov, a periodic comet and his first comet discovery. 33. She discovered or co-discovered several comets, including periodic comets 38P / Stephan-Oterma and 39P / Oterma. 34. Hickory has become an astronomer, and when she discovers a periodic comet , she names it Iona's comet. 35. He also co-discovered 117P / Helin Roman Alu and 132P / Helin Roman Alu, two periodic comets . 36. He discovered periodic comet 106P / Schuster. 37. His name is associated with the periodic comet 38P / Stephan-Oterma, although J�r�me Coggia saw it first. 38. She co-discovered periodic comet 134P / Kowal-V�vrov? 39. However, the periodic comet 61P / Shajn Schaldach was co-discovered by his wife rather than by him. 40. He specialized in the discovery of comets, including periodic comets 12P / Pons-Brooks and 16P / Brooks.
