Rona Chasma
What Rona Chasma is
Rona Chasma is a chasma — a deep, steep-sided canyon — on Venus, 1,520 km across, centred at 2.5° N, 72.0° W in the Devana Chasma quadrangle. It is the 98th largest named feature on Venus and the 9th largest of its class there.
Where the name comes from
Maori Moon goddess who controls the tides. The International Astronomical Union approved the name in 2012, under the theme it applies to every chasma on Venus. Of the 63 features of this class catalogued on Venus, the naming categories run Siberia (5), Slavic (4), Caucasus (4), Greek (3).
What it would take to settle Rona Chasma
Venus scores 43 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 2.5° N, 72.0° W.
What this spot has going for it is sunlight — 100% of the sunlight the sunniest latitude on Venus gets. What works against it is water — same as everywhere else on this world.
Computed from Rona Chasma'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 Venus (radiation geometry, earth link). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Venus 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 chasma features on Venus
All 63 chasmata on Venus — mapped together, with the naming theme and the size distribution.