Book contents
- Frontmatter
- Preface
- Advice on using this book
- Contents
- The Moon – an introduction
- Atlas of lunar formations
- 1 Mare Smythii
- 2a Mare Crisium
- 2b Mare Crisium
- 3 Cleomedes
- 4 Endymion
- 5 Atlas/Hercules
- 6 Montes Taurus
- 7 Palus Somni
- 8a Mare Fecunditatis
- 8b Mare Fecunditatis
- 9 Langrenus/Petavius
- 10 Mare Australe
- 11 Vlacq
- 12 Vallis Rheita
- 13a Mare Nectaris
- 13b Mare Nectaris
- 14 Rupes Altai
- 15 Abulfeda
- 16 Theophilus
- 17 Sinus Asperitatis
- 18 Statio Tranquillitatis
- 19a Mare Tranquillitatis
- 19b Mare Tranquillitatis
- 20a Mare Serenitatis
- 20b Mare Serenitatis
- 21 Posidonius
- 22 Lacus Mortis
- 23 Aristoteles/Eudoxus
- 24 Montes Caucasus
- 25 Autolycus/Aristillus
- 26 Cassini
- 27 Montes Alpes
- 28 Plato
- 29 Montes Teneriffe
- 30 Archimedes
- 31a Montes Apenninus
- 31b Montes Apenninus
- 32 Mare Vaporum
- 33 Rima Ariadaeus
- 34 Rima Hyginus
- 35 Sinus Medii
- 36 Hipparchus
- 37a Ptolemaeus
- 37b Ptolemaeus
- 38 Rupes Recta
- 39 Regiomontanus
- 40 Maurolycus
- 41 South Pole
- 42 Clavius
- 43 Tycho
- 44 Schiller
- 45 Palus Epidemiarum
- 46 Pitatus
- 47 Mare Nubium
- 48 Fra Mauro
- 49 Mare Cognitum
- 50 Mare Insularum
- 51a Copernicus
- 51b Copernicus
- 52 Eratosthenes
- 53a Mare Imbrium
- 53b Mare Imbrium
- 54 Sinus Iridum
- 55 Gruithuisen
- 56 Mare Frigoris
- 57 North Pole
- 58 Aristarchus
- 59 Kepler
- 60 Seleucus
- 61 Reiner
- 62 Letronne/Hansteen
- 63 Gassendi
- 64 Mare Humorum
- 65 Schickard
- 66 Sirsalis
- 67 Grimaldi
- 68 Mare Orientale
- 69 Lunar Farside
- Glossary
- Index of lunar features
- Image credits
- Further reading and references
51b - Copernicus
Published online by Cambridge University Press: 05 October 2012
- Frontmatter
- Preface
- Advice on using this book
- Contents
- The Moon – an introduction
- Atlas of lunar formations
- 1 Mare Smythii
- 2a Mare Crisium
- 2b Mare Crisium
- 3 Cleomedes
- 4 Endymion
- 5 Atlas/Hercules
- 6 Montes Taurus
- 7 Palus Somni
- 8a Mare Fecunditatis
- 8b Mare Fecunditatis
- 9 Langrenus/Petavius
- 10 Mare Australe
- 11 Vlacq
- 12 Vallis Rheita
- 13a Mare Nectaris
- 13b Mare Nectaris
- 14 Rupes Altai
- 15 Abulfeda
- 16 Theophilus
- 17 Sinus Asperitatis
- 18 Statio Tranquillitatis
- 19a Mare Tranquillitatis
- 19b Mare Tranquillitatis
- 20a Mare Serenitatis
- 20b Mare Serenitatis
- 21 Posidonius
- 22 Lacus Mortis
- 23 Aristoteles/Eudoxus
- 24 Montes Caucasus
- 25 Autolycus/Aristillus
- 26 Cassini
- 27 Montes Alpes
- 28 Plato
- 29 Montes Teneriffe
- 30 Archimedes
- 31a Montes Apenninus
- 31b Montes Apenninus
- 32 Mare Vaporum
- 33 Rima Ariadaeus
- 34 Rima Hyginus
- 35 Sinus Medii
- 36 Hipparchus
- 37a Ptolemaeus
- 37b Ptolemaeus
- 38 Rupes Recta
- 39 Regiomontanus
- 40 Maurolycus
- 41 South Pole
- 42 Clavius
- 43 Tycho
- 44 Schiller
- 45 Palus Epidemiarum
- 46 Pitatus
- 47 Mare Nubium
- 48 Fra Mauro
- 49 Mare Cognitum
- 50 Mare Insularum
- 51a Copernicus
- 51b Copernicus
- 52 Eratosthenes
- 53a Mare Imbrium
- 53b Mare Imbrium
- 54 Sinus Iridum
- 55 Gruithuisen
- 56 Mare Frigoris
- 57 North Pole
- 58 Aristarchus
- 59 Kepler
- 60 Seleucus
- 61 Reiner
- 62 Letronne/Hansteen
- 63 Gassendi
- 64 Mare Humorum
- 65 Schickard
- 66 Sirsalis
- 67 Grimaldi
- 68 Mare Orientale
- 69 Lunar Farside
- Glossary
- Index of lunar features
- Image credits
- Further reading and references
Summary
Close to the edge of the crater are two small craters: Copernicus H with a diameter of 5 km (to the southeast) and Gay-Lussac N, with a diameter of only 2 km (to the north). Both craters are surrounded by dark haloes and lie as if stamped into the Copernicus ejecta. Multispectral investigations show that the dark haloes consist of pulverized mare basalt, which was excavated from beneath the ejecta from Copernicus. Both craters are, admittedly, small, but they must be deep enough to have brought the basalt to the surface. They are included in the class of Dark Halo Craters. Two craters that arose similarly, and with dark haloes of mare basalt, lie southeast of Theophilus. Craters with dark haloes – like the bright ray systems – are best seen under high solar illumination. Because they are generally very small, it is advisable to use magnifications of 150 to 200× for visual observation.
Two smaller, overlapping craters, Fauth (12 km, 6.3°N, 20.1°W) and Fauth A (10 km) lie directly south of Copernicus. Fauth and Fauth A are most probably secondary craters, originating in the gigantic Imbrium impact. The two craters resemble a keyhole, and when taken together with Copernicus, the three craters serve as an indicator of the north-south direction of the lunar coordinate system.
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- The Cambridge Photographic Moon Atlas , pp. 150 - 151Publisher: Cambridge University PressPrint publication year: 2012