I am not sure if you are aware, but the Traveller World 5 site (which is unofficial) has some flaws in its calculations. So it does not give results that match the text materials.
You can tell this because Terra is listed as a density of 0.88 Earths and an atmospheric density of 1.1, and its mean temperature is -39 C. None of which is true, obviously. Sadly, Traveller World is mostly useful for the maps, but even then you need to look closely.