Fracastorius is the lava-flooded remnant of an ancient lunar impact crater located at the southern edge of Mare Nectaris. T. W. Webb describes this as "a partially destroyed ring."
Satellite craters
thumb|right|Satellite craters of Fracastorius
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Fracastorius.
thumb|right|Oblique view facing south from [[Apollo 11. The small crater in left foreground is Rosse.]]
thumb|right|Similar view with different lighting from [[Apollo 16]]
{| class="wikitable"
!width="25%" style="background:#eeeeee;" |Fracastorius
!width="25%" style="background:#eeeeee;" |Latitude
!width="25%" style="background:#eeeeee;" |Longitude
!width="25%" style="background:#eeeeee;" |Diameter
|-
|align="center"|A
|align="center"|24.4° S
|align="center"|36.5° E
|align="center"|18 km
|-
|align="center"|B
|align="center"|22.5° S
|align="center"|37.2° E
|align="center"|27 km
|-
|align="center"|C
|align="center"|24.6° S
|align="center"|34.6° E
|align="center"|16 km
|-
|align="center"|D
|align="center"|21.8° S
|align="center"|30.9° E
|align="center"|28 km
|-
|align="center"|E
|align="center"|20.2° S
|align="center"|31.0° E
|align="center"|13 km
|-
|align="center"|G
|align="center"|21.2° S
|align="center"|38.3° E
|align="center"|16 km
|-
|align="center"|H
|align="center"|20.7° S
|align="center"|30.6° E
|align="center"|21 km
|-
|align="center"|J
|align="center"|20.8° S
|align="center"|37.4° E
|align="center"|12 km
|-
|align="center"|K
|align="center"|25.4° S
|align="center"|34.7° E
|align="center"|17 km
|-
|align="center"|L
|align="center"|20.6° S
|align="center"|33.2° E
|align="center"|5 km
|-
|align="center"|M
|align="center"|21.7° S
|align="center"|32.9° E
|align="center"|4 km
|-
|align="center"|N
|align="center"|23.2° S
|align="center"|34.0° E
|align="center"|10 km
|-
|align="center"|P
|align="center"|25.5° S
|align="center"|33.3° E
|align="center"|8 km
|-
|align="center"|Q
|align="center"|25.1° S
|align="center"|33.2° E
|align="center"|8 km
|-
|align="center"|R
|align="center"|23.8° S
|align="center"|33.7° E
|align="center"|5 km
|-
|align="center"|S
|align="center"|19.0° S
|align="center"|31.9° E
|align="center"|5 km
|-
|align="center"|T
|align="center"|19.8° S
|align="center"|37.4° E
|align="center"|14 km
|-
|align="center"|W
|align="center"|22.6° S
|align="center"|35.7° E
|align="center"|7 km
|-
|align="center"|X
|align="center"|23.0° S
|align="center"|31.1° E
|align="center"|7 km
|-
|align="center"|Y
|align="center"|23.0° S
|align="center"|32.0° E
|align="center"|12 km
|-
|align="center"|Z
|align="center"|24.8° S
|align="center"|33.6° E
|align="center"|9 km
|}
References
</references>