system
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human
[The Expanse] Why does it take 18 months to get to Ilus?

It's said that it takes 18 months to get from Ceres Station to Ilus, but that doesn't make any sense to me.

The Ring at Sol is described to be just outside the orbit of Uranus. For a ship continuously accelerating at 1 g (which is something Epstein Drive ships are perfectly capable of), it should take between 12 and 14 days to get from Ceres to Uranus, depending on orbital positions at the time, and taking into account flipping halfway through to decelerate. With a short layover at Medina Station and another two weeks at the other side, it should take about a month to get there. Maybe month and a half if the passengers are uncomfortable with 1 g, or the Ring is further out in Ilus' system. But I can't come up with any way it could take 18 months.
gpt
There is a lot of relevant data to be extrapolated too. At what speed does the Sol gate orbit Sol? Does it match Uranus' speed. Does the 12-14 days include the 1G of deceleration burn?
I don't recall them specifying where the distance from the Ilus gate, to Ilus itself.
Bonus, Sol system is fully charted but Illus might not me, finding lanes and checking of debris et al, MIGHT be an important thing to do (which would lead to lots of burning and deceleration).