Secchi (lunar crater)

Secchi (lunar crater)

240px Apollo 15 mapping camera image
Coordinates
Diameter	25 km
Depth	1.9 km
Colongitude	317° at sunrise
Eponym	P. Angelo Secchi

File:Secchi crater AS11-42-6306.jpg

Northeastern Secchi at low sun angle, from Apollo 11

Secchi is a small lunar crater formation on the northwest edge of Mare Fecunditatis. To the northeast is the crater Taruntius. The western rim is joined with a section of the minor Montes Secchi range. The rim of this crater has been opened in the northern and southern ends, leaving two curved ridges facing each other across the crater floor. To the south is a pair of rilles designated the Rimae Secchi. These lie near the edge of the mare, and have a combined length of about 40 kilometers.

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 Secchi.

Secchi	Latitude	Longitude	Diameter
A	3.3° N	41.5° E	5 km
B	3.7° N	41.5° E	5 km
G	4.0° N	44.6° E	8 km
K	0.2° S	45.4° E	3 km
U	1.1° N	42.2° E	6 km
X	0.7° S	43.6° E	6 km

• Rima Messier 5042 med.jpg

  Oblique view of Rima Messier from Lunar Orbiter 5, also showing Secchi X above center and Secchi K at lower right