Cyrillus (crater)

Cyrillus
	Lunar Orbiter 4 image
Coordinates	13°12′S 24°00′E / 13.2°S 24.0°ECoordinates: 13°12′S 24°00′E / 13.2°S 24.0°E
Diameter	98 km
Depth	3.6 km
Colongitude	335° at sunrise
Eponym	Saint Cyril

Location of Cyrillus

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 4th-century Coptic Pope 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 brigth rays on the east side of Cyrillus has been named Shioli.^[4]

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 Cyrillus.^[5]

Cyrillus	Latitude	Longitude	Diameter
A	13.8° S	23.1° E	17 km
C	12.3° S	21.5° E	12 km
E	15.8° S	25.3° E	11 km
F	15.3° S	25.5° E	44 km
G	15.6° S	26.6° E	8 km

The following craters have been renamed by the IAU.

Cyrillus B — See Ibn-Rushd crater.

Cyrillus A, facing southwest, from Apollo 14
Cyrillus E, facing southwest, from Apollo 14
Cyrillus G, facing southwest, from Apollo 14

References[]

^ "Cyrillus (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
^ Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 0-304-35469-4. p. 81, 209
^ Grego, Peter (2005). Moon Observer's Guide. Springer. ISBN 1-85233-748-6. p. 207
^ "Cyrillus (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
^ Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2.

[1] "Cyrillus (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.

[b-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] Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2.

[1]

[2]

[3]

[4]

[5]

v t Craters on the Moon: C–F
C	C. Herschel C. Mayer Cabannes Cabeus Cailleux Cai Lun Cajal Cajori Calippus Cameron Campanus Campbell Cannizzaro Cannon Cantor Capella Capuanus Cardanus Carlini Carlos Carmichael Carnot Carol Carpenter Carrel Carrillo Carrington Cartan Carver Casatus Cassegrain Cassini Catalán Catharina Cauchy Cavalerius Cavendish Caventou Cayley Celsius Censorinus Cepheus Chacornac Chadwick Chaffee Challis Chalonge Chamberlin Champollion Chandler Chang Heng Chang-Ngo Chant Chaplygin Chapman Chappe Chappell Charles Charlier Chaucer Chauvenet Chawla Chebyshev Chernyshev Chevallier Ching-Te Chladni Chrétien Cichus Clairaut Clark Clausius Clavius Cleomedes Cleostratus Clerke Coblentz Cockcroft Collins Colombo Compton Comrie Comstock Condon Condorcet Congreve Conon Cook Cooper Copernicus Cori Coriolis Couder Coulomb Courtney Cremona Crile Crocco Crommelin Crookes Crozier Crüger Ctesibius Curie Curtis Curtius Cusanus Cuvier Cyrano Cyrillus Cysatus
D	D. Brown da Vinci Daedalus Dag Daguerre Dale d'Alembert Dalton Daly Damoiseau Daniell Danjon Dante Darney D'Arrest D'Arsonval Darwin Das Daubrée Davisson Davy Dawes Dawson De Forest de Gasparis de Gerlache De La Rue De Moraes De Morgan De Roy De Sitter De Vico De Vries Debes Debus Debye Dechen Delambre Delaunay Delia Delisle Dellinger Delmotte Delporte Deluc Dembowski Democritus Demonax Denning Desargues Descartes Deseilligny Deslandres Deutsch Dewar Diana Diderot Dionysius Diophantus Dirichlet Dobrovol'skiy Doerfel Dollond Donati Donna Donner Doppelmayer Doppler Douglass Dove Draper Drebbel Dreyer Drude Dryden Drygalski Dubyago Dufay Dugan Dunér Dunthorne Dyson Dziewulski
E	Eckert Eddington Edison Edith Egede Ehrlich Eichstadt Eijkman Eimmart Einstein Einthoven Elger Ellerman Ellison Elmer Elvey Emden Encke Endymion Engel'gardt Eötvös Epigenes Epimenides Eratosthenes Erlanger Erro Esclangon Esnault-Pelterie Espin Euclides Euctemon Eudoxus Euler Evans Evdokimov Evershed Ewen
F	Fabbroni Fabricius Fabry Fahrenheit Fairouz Faraday Faustini Fauth Faye Fechner Fedorov Felix Fényi Feoktistov Fermat Fermi Fernelius Fersman Fesenkov Feuillée Fibiger Finsch Finsen Firmicus Firsov Fischer Fitzgerald Fizeau Flammarion Flamsteed Fleming Florensky Florey Focas Fontana Fontenelle Foster Foucault Fourier Fowler Fox Fra Mauro Fracastorius Franck Franklin Franz Fraunhofer Fredholm Freud Freundlich Fridman Froelich Frost Fryxell Furnerius

Lunar Orbiter 4 image
Coordinates	13°12′S 24°00′E / 13.2°S 24.0°E / -13.2; 24.0Coordinates: 13°12′S 24°00′E / 13.2°S 24.0°E / -13.2; 24.0
Diameter	98 km
Depth	3.6 km
Colongitude	335° at sunrise
Eponym	Saint Cyril