Tettu Facula
What Tettu Facula is
Tettu Facula is a facula — a bright spot — on Ganymede, 189 km across, centred at 37.6° N, 161.0° W. It is the 60th largest named feature on Ganymede and the 10th largest of its class there.
Where the name comes from
Egyptian town where Hatmenit and Osiris were worshipped. The International Astronomical Union approved the name in 1985, under the theme it applies to every facula on Ganymede.
What it would take to settle Tettu Facula
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 37.6° N, 161.0° W.
What this spot has going for it is water — same as everywhere else on this world. What works against it is temperature — about -163 °C mean at this latitude.
Computed from Tettu Facula'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.
What is next to it
The largest facula features on Ganymede
All 13 faculae on Ganymede — mapped together, with the naming theme and the size distribution.