How Far Away is Comet 117P/Helin-Roman-Alu from Earth?
The distance of Comet 117P/Helin-Roman-Alu from Earth is currently 743,285,336 kilometers, equivalent to 4.968556 Astronomical Units. Light takes 41 minutes and 19.3330 seconds to travel from Comet 117P/Helin-Roman-Alu and arrive to us.