Simpelius (crater) explained

Coordinates:-73°N 15.2°W
Diameter:70 km
Depth:3.2 km
Colong:349
Eponym:Hugh Sempill

Simpelius is an impact crater that lies in the southern part of the Moon. It lies to the north-northwest of the somewhat larger crater Schomberger, and east-southeast of the prominent Moretus.The most distinctive aspect of this crater is the asymmetry of the inner wall, with the side being nearly twice as wide at the southern end as it is to the north. As a result, the level interior floor is offset to the north of the crater interior. The rim and inner wall are less sharply defined than those of Schomberger or Moretus, having been softened and smoothed by impacts. The rim is uneven, with peaks to the north, west, east, and south-southeast, and low sections in between. There are also a number of small crater pits along the inner wall and the interior floor.

India's Chandrayaan-3 mission successfully landed near the crater at 69.37 degrees south latitude and 32.35 degrees east longitude.

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 Simpelius.

SimpeliusLatitudeLongitudeDiameter
A70.1° S16.5° E60 km
B75.2° S10.2° E50 km
C72.6° S5.9° E49 km
D71.6° S8.6° E54 km
E70.1° S11.0° E45 km
F68.7° S16.8° E29 km
G71.8° S23.0° E24 km
H68.0° S15.5° E29 km
J76.1° S8.4° E17 km
K74.8° S15.7° E23 km
L70.4° S6.7° E16 km
M70.4° S16.4° E7 km
N71.3° S24.3° E8 km
P75.5° S5.0° E8 km

References

. Patrick Moore . 2001 . On the Moon . . 978-0-304-35469-6 .

. Antonín Rükl . 1990 . Atlas of the Moon . . 978-0-913135-17-4 .

. Thomas William Webb . 1962 . Celestial Objects for Common Telescopes . 6th revised . Dover . 978-0-486-20917-3 .

. Ewen Whitaker . 1999 . Mapping and Naming the Moon . Cambridge University Press . 978-0-521-62248-6 .