1. Ice is a major ingredient both in first-timers and in periodic comets . 2. The parent body of the shower is Halley's Comet, a periodic comet . 3. Periodic comets also have a number indicating the order of their discovery.4. Chernykh discovered two periodic comets 74P / Smirnova-Chernykh and 101P / Chernykh. 5. The periodic comet 27P / Crommelin was previously called " Comet Pons-Coggia-Winnecke-Forbes ". 6. Perrine co-discovered the lost periodic comet 18D / Perrine-Mrkos and several other comets. 7. She also co-discovered the periodic comet 74P / Smirnova-Chernykh, along with Nikolai Stepanovich Chernykh. 8. He discovered a number of comets, including the lost periodic comet 34D / Gale. 9. Urata co-discovered the periodic comet 112P / Urata-Niijima in 1986. 10. Notably, he successfully predicted the 1992 return of the once-lost periodic comet Swift Tuttle.
