Engelgardt, or Engelhardt, is a lunar impact crater on the far side of the Moon. Engelgardt lies on the southern margin of the Dirichlet-Jackson Basin. It is located to the north of Korolev, a huge walled plain. The satellite crater Engelgardt B is attached to the north rim of this crater, and is actually a much larger formation with a diameter of 163 km. To the west-northwest is the crater Lebedinskiy.
This crater dates to the Early Imbrian period on the lunar geologic timescale. It is a circular formation with a rim that has been only mildly eroded. The material on the inner sides has slid down to form piles of scree along the base. The inner wall is narrowed to the south, where the satellite crater Engelgardt N lies adjacent to the edge. The highest-elevation point on the entire surface of the Moon, above the mean lunar elevation, is located on the east rim of Engelgardt Crater. Less than a crater diameter to the east-southeast is a small crater with a high albedo surrounded by a skirt of light surface. This skirt reaches to the edge of Engelgardt's rim.
This formation is named after Russian astronomer Vasilij Pavlovich Engelgardt (1828-1915). Its designation was formally adopted by the International Astronomical Union in 1970.
Satellite craters By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Engelgardt.
EngelgardtLatitudeLongitudeDiameterB8.3° N157.7° W136 kmC10.1° N156.9° W49 kmJ2.7° N155.4° W19 kmK2.4° N157.8° W18 kmN4.4° N159.3° W28 kmR4.4° N162.0° W15 km
References See p. 197.
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