Charis Dorsum
What Charis Dorsum is
Charis Dorsum is a dorsum — a ridge — on Mars, 251 km across, centred at 55.9° S, 41.5° W in the Argyre quadrangle. It is the 355th largest named feature on Mars and the 24th largest of its class there.
Where the name comes from
One of the Graces. The International Astronomical Union approved the name in 1991, under the theme it applies to every dorsum on Mars. Of the 36 features of this class catalogued on Mars, the naming categories run Greek (20), Latin (13), Egypt (1), Syria (1).
What it would take to settle Charis Dorsum
Mars scores 26.6 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 55.9° S, 41.5° W.
What this spot has going for it is water — inside the polar zone where Mars keeps its ice. What works against it is ground — mixed ground — a rim, a floor and slopes between them.
Computed from Charis Dorsum's catalogued latitude, longitude and feature class — 74% of the model's weight had a basis here, and 2 axes were dropped as not applicable to Mars (radiation geometry, earth link). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Mars 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 dorsum features on Mars
All 36 dorsa on Mars — mapped together, with the naming theme and the size distribution.