How Far Away is Comet 117P/Helin-Roman-Alu from Earth?
The distance of Comet 117P/Helin-Roman-Alu from Earth is currently 769,434,745 kilometers, equivalent to 5.143354 Astronomical Units. Light takes 42 minutes and 46.5580 seconds to travel from Comet 117P/Helin-Roman-Alu and arrive to us.