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Io · Mons · 89th largest named feature

Antenora Mons

Name for the second ring of Cocytus, the frozen lake that is the ninth circle of Hell in Dante’s “The Inferno.”

What Antenora Mons is

Antenora Mons is a mons — a mountain — on Io, 122 km across, centred at 84.9° N, 26.4° E. It is the 89th largest named feature on Io and the 25th largest of its class there.

Where the name comes from

Name for the second ring of Cocytus, the frozen lake that is the ninth circle of Hell in Dante’s “The Inferno.” The International Astronomical Union approved the name in 2025, under the theme it applies to every mons on Io. Of the 26 features of this class catalogued on Io, the naming categories run Greek (12), Italy (4), Hawaii (1), Iran (1).

Feature class
a mountain
Diameter
122 km
about the width of Yellowstone
Coordinates
84.9° N, 26.4° E
Planetocentric, on Io
Name approved
2025
By the IAU Working Group for Planetary System Nomenclature
Naming category
Italy
Europe

What it would take to settle Antenora Mons

Io scores 76.7 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 84.9° N, 26.4° E.

Settlement difficulty here
83.1/ 100
Among the hardest on this world
Io overall
76.7
6.4 harder than the median site
Ranked
260th
of 260 named places on Io

What this spot has going for it is ground broken ground — hard to reach, and worth reaching for the shelter and the exposed strata. What works against it is water same as everywhere else on this world.

Computed from Antenora Mons'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 Io (earth link, known ground). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Io 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 mons features on Io

All 26 montes on Io — mapped together, with the naming theme and the size distribution.