Fracastorius (crater)

Fracastorius

Mosaic of Lunar Orbiter 4 images
Diameter	124 km
Depth	None
Colongitude	327° at sunrise
Eponym	Girolamo Fracastoro

Fracastorius is the lava-flooded remnant of an ancient lunar impact crater located at the southern edge of Mare Nectaris. To the northwest of this formation lies the crater Beaumont, while to the northeast is Rosse.

The northern wall of this crater is missing, with only mounds appearing in the lunar mare to mark the outline. The lava that formed Mare Nectaris also invaded this crater, so the structure now forms a bay-like extension. The remainder of the rim is heavily worn and covered in lesser impact craters, leaving little of the original rim intact. The maximum elevation of the rim is 2.4 km. The most prominent of these craters is Fractastorius D, which overlies a portion of the western rim.

Fracastorius has no central peak, but a long, slender rille runs across the middle of the floor in a generally east-west direction.

The crater commemorates the Italian scholar, astronomer and poet Girolamo Fracastoro, "Fracastorius" (1478‑1553).

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 Fracastorius.

Fracastorius	Latitude	Longitude	Diameter
A	24.4° S	36.5° E	18 km
B	22.5° S	37.2° E	27 km
C	24.6° S	34.6° E	16 km
D	21.8° S	30.9° E	28 km
E	20.2° S	31.0° E	13 km
G	21.2° S	38.3° E	16 km
H	20.7° S	30.6° E	21 km
J	20.8° S	37.4° E	12 km
K	25.4° S	34.7° E	17 km
L	20.6° S	33.2° E	5 km
M	21.7° S	32.9° E	4 km
N	23.2° S	34.0° E	10 km
P	25.5° S	33.3° E	8 km
Q	25.1° S	33.2° E	8 km
R	23.8° S	33.7° E	5 km
S	19.0° S	31.9° E	5 km
T	19.8° S	37.4° E	14 km
W	22.6° S	35.7° E	7 km
X	23.0° S	31.1° E	7 km
Y	23.0° S	32.0° E	12 km
Z	24.8° S	33.6° E	9 km

References

• Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097. {{cite book}}: Invalid |ref=harv (help)
• Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05. {{cite web}}: Invalid |ref=harv (help)
• Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4. {{cite book}}: Invalid |ref=harv (help)
• Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1. {{cite book}}: Invalid |ref=harv (help)
• McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24. {{cite web}}: Invalid |ref=harv (help)
• Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6. {{cite book}}: Invalid |ref=harv (help)
• Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3. {{cite book}}: Invalid |ref=harv (help)
• Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4. {{cite book}}: Invalid |ref=harv (help)
• Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revision ed.). Dover. ISBN 978-0-486-20917-3. {{cite book}}: Invalid |ref=harv (help)
• Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6. {{cite book}}: Invalid |ref=harv (help)
• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1. {{cite book}}: Invalid |ref=harv (help)