A CD has a radius of 12 cm for a playtime of 74 minutes because it is the playtime of Beethoven’s 9th symphony.
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A Jupiter’s day lasts 9h50min.
So, there is no reason to complain here about lack of time.
(*) If you are friendless, this my be the right thing to start gather some!
“A day on Jupiter” sounds better to me, and i think you should say THE lack of time.
Sources ( http://simple.wikipedia.org/wiki/Jupiter ) say 9h55min.