Back فوهة كيرلس Arabic Ciril (cràter) Catalan Кирилл (беттан кратер) CE Cyrillus (kráter) Czech Cyrillus (månekrater) Danish Cyrillus (Mondkrater) German Cyrillus (cráter) Spanish سیریلیوس (دهانه) Persian Cyrillus (cratère) French Cratere Cyrillus Italian

Cyrillus (crater)

Cyrillus
Lunar Orbiter 4 image
Coordinates13°12′S 24°00′E / 13.2°S 24.0°E / -13.2; 24.0
Diameter98 km
Depth3.6 km
Colongitude335° at sunrise
EponymSaint Cyril
Selenochromatic Image (Si) of the crater location

Cyrillus is a lunar impact crater located on the northwest edge of Mare Nectaris. Intruding into the northeast rim is the slightly larger, and younger crater Theophilus. To the south is another prominent crater named Catharina. Together these three craters form a prominent trio in the southeast quadrant of the Moon. To the northwest is Ibn-Rushd. Cyrillus is named after Saint Cyril of Alexandria, a 5th-century Patriarch and theologian.[1]

The floor of Cyrillus contains a reduced central hill and the considerable crater Cyrillus A. The walls of the broken formation of Cyrillus remain intact until the point of junction with Theophilus.[2] Slightly northeast of its center, three rounded mountains rise to heights of 1,000 metres above Cyrillus' floor: Cyrillus Alpha, Delta, and Eta.[3]

A tiny crater with bright rays on the east side of Cyrillus has been named Shioli.[4] A point to the east of Shioli is the proposed landing site of Japan's SLIM lander.[5][6][7]

  1. ^ "Cyrillus (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  2. ^ Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 0-304-35469-4. p. 81, 209
  3. ^ Grego, Peter (2005). Moon Observer's Guide. Springer. ISBN 1-85233-748-6. p. 207
  4. ^ "Cyrillus (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  5. ^ Moon Monday #144: On the most precise planetary landing attempt by SLIM, sprawling SLS rocket costs, and more, Jatan’s Space, SEP 11, 2023.
  6. ^ SLIM, JAXA website in Japanese
  7. ^ On the Way to Shioli Crater, LROC image team, Posted by Mark Robinson on November 07, 2023 18:51 UTC.

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