Lembatta Prime was a planet, and member world of the United Federation of Planets. On Lembatta Prime, a solar eclipse is marked as a major religious holiday, as are the days immediately preceding and following the eclipse. Such an event happened in April of 2380, and necessitated the rescheduling of a visit by Federation President Nanietta Bacco during her goodwill tour that month. Bacco did in fact visit Lembatta Prime during her tour, and held a "town hall meeting" while there. (ST novel: Articles of the Federation)