Bayer is a lunar impact crater located in the southwest section of the moon, to the east of the crater Schiller. To the south is Rost.
The rim of Bayer is slightly worn by erosion, but remains well-defined. There is an inner terrace, but the outer wall is intruded upon by nearby impacts. The most significant of these is Schiller H, which forms a ridge attached to the northwest rim of Bayer. The floor of Bayer is relatively flat and lacks a central peak. There is a small, but notable crater on the floor near the western wall, Bayer G. This crater has a breach in its northern rim.
This crater is named after German lawyer and astronomer Johann Bayer (1572-1625), the first person to produce a sky atlas that covered the entire celestial sphere. The formation's designation was formally adopted by the International Astronomical Union in 1935.
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 Bayer.
BayerLatitudeLongitudeDiameterA51.3° S30.3° W18 kmB48.8° S28.2° W18 kmC49.7° S31.2° W22 kmD47.9° S29.8° W20 kmE51.7° S32.3° W29 kmF53.0° S31.6° W20 kmG51.7° S35.3° W7 kmH53.5° S32.5° W27 kmJ52.5° S33.6° W18 kmK50.2° S34.0° W16 kmL47.5° S33.6° W14 kmM50.6° S31.0° W10 kmN48.3° S29.2° W9 kmP51.6° S29.5° W4 kmR52.5° S35.5° W9 kmS52.3° S36.4° W13 kmT49.2° S30.1° W8 kmU48.4° S31.3° W10 kmV47.5° S31.6° W9 kmW48.0° S33.5° W9 kmX53.4° S33.6° W8 kmY49.2° S35.7° W31 kmZ49.0° S33.4° W7 km
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