In 2380, the Cheiron was assigned to the independent world of Carrea at the request of the Carreon Science Institute, to investigate solar flares from the system's sun. In March of that year, Federation President Nanietta Bacco used the Cheiron's presence at Carrea to threaten war with that world, following long and fruitless negotiations for a Carreon water reclamation system for Delta IV. (ST novel: Articles of the Federation) In 2381, the Cheiron was ordered to Cestus III to help with the refugee crisis there. (ST novel: A Singular Destiny)