Geological Chronicle
Hildegard is an ancient impact formation situated on the southern far side of the Moon, northwest of Planck crater and southeast of Pikel'ner. The structure measures 122 kilometers across, with an irregular floor pitted by numerous smaller impacts. Subsequent bombardment has worn down the rim, though its northern crest still rises nearly 4,000 meters above the crater floor.
The crater contains one recognized satellite feature, designated Hildegard K, which sits entirely within the northeastern contour of the main rim. Before the primary structure received its formal designation, this interior crater was cataloged as Pikel'ner K.
On February 25, 2016, the International Astronomical Union officially adopted the name Hildegard. The designation honors Hildegard von Bingen, a 12th-century German Benedictine abbess, writer, and composer regarded in Germany as a founder of scientific natural history.