> On Mar 5, 2016, at 6:11 PM, Dave <xxxxxx@usa.net> wrote:
>
> I'd think that in relation to a stationary observer on the planet, the satellite would travel slowly across the sky, in reverse direction of the sun, for 5 local days, then disappear below the horizon for another 5.  Assuming that the periods in question are exactly 18 and 20 hours.

This is correct. The satellite completes 9 rotations for every 10 of the mainworld.

--
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs