I actually like the chart, but then, for some reason I'd always pegged that a freighter like Starbug 1 would be taking several days to get to Jupiter from Earth... which is part of why Jeph built himself the thing in the first place. He knew it would take a while to get back and forth, and wanted to make sure his ride was at least a reasonably comfortable way to have cabin fever. 
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor