Title: "The Four Thousand, the Eight Hundred"
Author: Greg Egan
Published: Asimovs December 2015
Description, from Rocket Stack Rank: "The situation on Vesta has reached the point where certain people flee to Ceres in suspended animation. Anna, the new Director of Ceres, tries to understand the refugees better as relations with Vesta continue to deteriorate."
Finalist in the Asimov’s 30th Annual Readers’ Award Poll