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The Moon · Crater · 1206th largest named feature

Cepheus

Mythological astronomer, father of Andromeda.

What Cepheus is

Cepheus is a crater — a circular depression, almost always an impact scar — on The Moon, 39.4 km across, centred at 40.7° N, 45.8° E in the Geminus quadrangle. It is the 1206th largest named feature on The Moon and the 952nd largest of its class there.

Where the name comes from

Mythological astronomer, father of Andromeda. The International Astronomical Union approved the name in 1935, under the theme it applies to every crater on The Moon. Of the 1615 features of this class catalogued on The Moon, the naming categories run Germany (234), American (229), France (163), Great Britain (160).

Feature class
a circular depression, almost always an impact scar
Diameter
39.4 km
about a marathon
Coordinates
40.7° N, 45.8° E
Planetocentric, on The Moon
Name approved
1935
By the IAU Working Group for Planetary System Nomenclature
Quadrangle
Geminus
Map sheet on The Moon
Naming category
Greek
Europe

What it would take to settle Cepheus

The Moon scores 29.1 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 40.7° N, 45.8° E.

Settlement difficulty here
28.9/ 100
Typical for this world
The Moon overall
29.1
0.2 easier than the median site
Ranked
953rd
of 2,023 named places on The Moon

What this spot has going for it is earth link near side — Earth stands 32° above the horizon and never moves. What works against it is water outside the ice-bearing latitudes.

Computed from Cepheus's catalogued latitude, longitude and feature class — 84% of the model's weight had a basis here, and one axis was dropped as not applicable to The Moon (radiation geometry). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on The Moon 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.

Cepheus's satellite craters

The IAU names smaller craters around a major one by letter. Cepheus has 1, and each shares the parent's namesake rather than carrying one of its own.

Cepheus A 12.5 km

What is next to it

The largest crater features on The Moon

All 1,615 craters on The Moon — mapped together, with the naming theme and the size distribution.