1983 Event Comet C/1983 H1 (IRAS-Araki-Alcock) approaches 0.0312 AUs of Earth 1702 Event Comet C/1702 H1 approaches within 0.0437 AUs of Earth 607 Event Comet 1P/607 H1 (Halley) approaches within 0.0898 AUs of Earth
