Perrine Regio
What Perrine Regio is
Perrine Regio is a regio — a large area distinguished by its brightness or colour — on Ganymede, 3,800 km across, centred at 34.0° N, 28.0° W. It is the 7th largest named feature on Ganymede and the 5th largest of its class there.
Where the name comes from
Charles D.; American astronomer (1867-1951). The International Astronomical Union approved the name in 1979, under the theme it applies to every regio on Ganymede. Of the 6 features of this class catalogued on Ganymede, the naming categories run American (3), Germany (1), Italy (1), England (1).
What it would take to settle Perrine Regio
Ganymede scores 55 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 34.0° N, 28.0° W.
What this spot has going for it is water — same as everywhere else on this world. What works against it is temperature — about -162 °C mean at this latitude.
Computed from Perrine Regio'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 Ganymede (earth link, known ground). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Ganymede 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.