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The Moon · Crater · 761st largest named feature

Dreyer

Johann Ludwig Emil; Danish astronomer (1852-1926).

What Dreyer is

Dreyer is a crater — a circular depression, almost always an impact scar — on The Moon, 63.8 km across, centred at 10.2° N, 97.1° E in the Babcock quadrangle. It is the 761st largest named feature on The Moon and the 544th largest of its class there.

Where the name comes from

Johann Ludwig Emil; Danish astronomer (1852-1926). The International Astronomical Union approved the name in 1970, 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
63.8 km
about a marathon
Coordinates
10.2° N, 97.1° E
Planetocentric, on The Moon
Name approved
1970
By the IAU Working Group for Planetary System Nomenclature
Quadrangle
Babcock
Map sheet on The Moon
Naming category
Great Britain
Europe

What it would take to settle Dreyer

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 10.2° N, 97.1° E.

Settlement difficulty here
29.5/ 100
Typical for this world
The Moon overall
29.1
0.4 harder than the median site
Ranked
1091st
of 2,023 named places on The Moon

What this spot has going for it is sunlight 98% of the sunlight the sunniest latitude on The Moon gets. What works against it is water outside the ice-bearing latitudes.

Computed from Dreyer'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.

Dreyer's satellite craters

The IAU names smaller craters around a major one by letter. Dreyer has 6, and each shares the parent's namesake rather than carrying one of its own.

Dreyer C 35.4 kmDreyer D 24.9 kmDreyer J 26.8 kmDreyer K 21.6 kmDreyer R 18.1 kmDreyer W 30.7 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.