Müller is a lunar impact crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

. It is located in the highlands near the center of the Moon, in the center of the triangle formed by the much larger craters Albategnius

Albategnius (crater)

Albategnius is an ancient lunar impact crater located in the central highlands. It is named after the Muslim astronomer and scientist Al-Battani. The level interior forms a "walled plain", surrounded by the high, terraced rim. The outer wall is somewhat hexagon-shaped, and has been heavily eroded...

, Ptolemaeus

Ptolemaeus (lunar crater)

Ptolemaeus is an ancient lunar impact crater close to the center of the near side. To the south-southeast Ptolemaeus is joined to the rim of the crater Alphonsus by a section of rugged, irregular terrain, and these form a prominent chain with Arzachel to the south...

, and Hipparchus

Hipparchus (lunar crater)

Hipparchus is the degraded remnant of a lunar crater. It is located to the southeast of Sinus Medii, near the center of the visible Moon. To the south is the prominent crater Albategnius, and to the southwest lies Ptolemaeus, a feature of comparable dimensions to Hipparchus. Horrocks lies entirely...

. To the east lies Halley

Halley (lunar crater)

Halley is a lunar impact crater that is intruding into the southern wall of the walled plain Hipparchus. To the southwest of Halley is the large crater Albategnius, and due east lies the slightly smaller Hind....

, while to the northwest is Gyldén

Gyldén (crater)

Gyldén is the remnant of a lunar crater that is located to the northeast of the walled plain Ptolemaeus on the Moon. It lies along the prime meridian of the selenographic coordinate system, and less than 150 km south of the lunar equator...

.

The rim of this crater is irregular and slightly oblong, with the long dimension oriented along a north–south axis. The southeastern rim is notched by two smaller craters identified as Müller A and Müller O.

Perhaps the most distinctive feature of this crater is the peculiar linear formation of small craters that starts at the southern edge of Müller's rim. These follow a line to the northwest, tangential to the rim of Ptolemaeus.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Müller.

Müller	Latitude	Longitude	Diameter
A	8.2° S	2.1° E	10 km
F	7.8° S	1.5° E	6 km
O	7.9° S	2.4° E	11 km