Chang Xi Chasmata
What Chang Xi Chasmata is
Chang Xi Chasmata is a chasma — a deep, steep-sided canyon — on Venus, 220 km across, centred at 59.0° S, 17.0° E in the Lada Terra quadrangle. It is the 718th largest named feature on Venus and the 62nd largest of its class there.
Where the name comes from
Chinese, gave birth to twelve moons. The International Astronomical Union approved the name in 1997, 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 Chang Xi Chasmata
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 59.0° S, 17.0° E.
What this spot has going for it is known ground — 7,074 km from Venera 14 (1982). What works against it is water — same as everywhere else on this world.
Computed from Chang Xi Chasmata'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.