Moyle Cavus
What Moyle Cavus is
Moyle Cavus is a cavus — a hollow or irregular steep-sided depression — on Europa, 145 km across, centred at 25.0° S, 168.0° W. It is the 73rd largest named feature on Europa and the 1st largest of its class there.
Where the name comes from
In Celtic mythology, a cold sea where the children of Lir (Llyr), transformed into swans, were forced to spend three hundred years. The International Astronomical Union approved the name in 2019.
What it would take to settle Moyle Cavus
Europa scores 60.9 as a world. That number is the same for every square metre of it — but sunlight, water, radiation and the ground under your feet are not. This is the same question asked at 25.0° S, 168.0° W.
What this spot has going for it is water — same as everywhere else on this world. What works against it is temperature — about -156 °C mean at this latitude.
Computed from Moyle Cavus's catalogued latitude, longitude and feature class — 84% of the model's weight had a basis here, and 2 axes were dropped as not applicable to Europa (earth link, known ground). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Europa and are already counted in the world's own index, not again here.
What this cannot see: elevation. Slope, local shadowing and the polar “peaks of eternal light” — ridge tops near the poles of a barely tilted world that catch sun almost continuously while a crater floor kilometres away never does — need a terrain model this does not have. Where a real mission targets a pole, that is usually why.