Trill has a surface area of 500 million km^2, which is similar to Earth (501 million km^2). Other data include an orbital distance of 1.215 AU, a year of 483 sols, a surface temperature of 297 Kelvin (23.85 C) and 1 satellite....
It is Stardate 866274.3, which places it, by TNG reckoning, in 3189. However, as I’ve noted before, this is an impossibility, since Burnham arrived in the 32nd Century in 3188, then spent a year before reuniting with Discovery (3189), then months passed between Seasons 3 and 4, and also between Seasons 4 and 5 so at a minimum...