{ "DiagramType": "Bounded elongation of venus epicyclic", "id": "MAPD0097", "thumb_file": "thumb.jpg", "foliopage": "45v", "metadata": { "General Information": { "Creator": "Gerd Gra\u00dfhoff, Hans-Christoph Liess", "Title": "MAPD0097", "Subtitle": "", "DOI": "10.17171/1-2-097", "Publisher": "edition topoi", "Publication Year": "2015", "Description": "Bounded Elongation of Venus Epicyclic" }, "Technical characteristics": { "Format": "JPEG", "Contributor Type": "", "Collection": "Eastwoodcollection", "Resource Type": "Image", "Contributor Name": "Gerd Gra\u00dfhoff", "Tools": "Digilib", "Date (Update)": "2015", "Size": "1.5 MB" }, "Specific Attributes": { "Holder digital source": "Exzellenzcluster 264 - Topoi", "Origin / Holder object": "", "Inventory Number": "", "Language source/object": "", "Related DOI": "", "Alternate DOI": "Calc185", "Geolocation/region": "" }, "Conditions for use": { "Rights: Creative Commons": "", "Further legal restrictions or comments": "" }, "Annotations": { "Version": "", "Subjects": "", "Further information": "" } }, "description": "Bounded Elongation of Venus Epicyclic: The manuscript Diagrams for this text are often confusing, and it is less easy to categorize them than the Diagrams for the previous text, which gives the observational account of Venus's elongation. As the text says, the epicyclic explanation builds upon the immediately preceding text that describes the visible elongation. However, with the positions of X and K already misplaced in most of the Diagrams for the prior text, any attempt to add an epicyclic circle for Venus would usually result in further error. Nonetheless, certain scholars of the eleventh century_filter_key did reconstruct the Diagrams correctly from the text. The epicyclical account of Venus's elongation prescribes a circle cutting the zodiacal radius XKB. This radius passes from the earth through the Sun at K, but the distance from X to K is nowhere stated. While it would seem proper to make this radius bisect the epicyclic circle, the location of K is possible at the center of the epicycle, below this center, or completely outside and below the epicycle. The last option would fit Plato's planetary order, which has Venus farther than the Sun from the earth. In any case, Calcidius does not specify the location of K with respect to the epicycle. The main purpose of the epicycle is not to show the order of planets but to show the limited movement of Venus with respect to the Sun, and the account does this. The epicycle \u0394EZH is drawn into the preexisting Diagram for the simple phenomenal description so that the epicycle fits between the zodiacal circle AB\u0393 and its center X and is tangent to the two preset radii XA and X\u0393, which pass to points 50\u00b0 to either side of the zodiacal point B.", "title": "MAPD0097 -Author: Calcidius -Century: 10 -Type:
bounded_elongation_of_venus_epicyclic", "type_filter_key": "bounded_elongation_of_venus_epicyclic", "century_filter_key": 10, "thumb_baseurl": "MAPD/ServiceMAPD/MAPD0097", "AuthorName": "Calcidius", "author_filter_key": "calcidius", "alt_id": "Calc185", "scis": { "images": { "file": "0097", "title": "MAPD0097" } }, "Century": 10, "doi": "10.17171/1-2-097", "resources": { "images": { "0097": { "resources_baseurl": "/MAPD/ReposMAPD/MAPD0097", "metadata": { "General Information": { "DOI": "10.17171/1-2-097-1", "Title": "Diagram MAPD0097", "Creator": "Gerd Gra\u00dfhoff, Hans-Christoph Liess, Domenico Schneider", "Subtitle": "", "Publisher": "edition topoi", "Publication Year": "2015", "Description": "Bounded Elongation of Venus Epicyclic: The manuscript diagrams for this text are often confusing, and it is less easy to categorize them than the diagrams for the previous text, which gives the observational account of Venus's elongation. As the text says, the epicyclic explanation builds upon the immediately preceding text that describes the visible elongation. However, with the positions of X and K already misplaced in most of the diagrams for the prior text, any attempt to add an epicyclic circle for Venus would usually result in further error. Nonetheless, certain scholars of the eleventh century did reconstruct the diagrams correctly from the text. The epicyclical account of Venus's elongation prescribes a circle cutting the zodiacal radius XKB. This radius passes from the earth through the Sun at K, but the distance from X to K is nowhere stated. While it would seem proper to make this radius bisect the epicyclic circle, the location of K is possible at the center of the epicycle, below this center, or completely outside and below the epicycle. The last option would fit Plato's planetary order, which has Venus farther than the Sun from the earth. In any case, Calcidius does not specify the location of K with respect to the epicycle. The main purpose of the epicycle is not to show the order of planets but to show the limited movement of Venus with respect to the Sun, and the account does this. The epicycle \u0394EZH is drawn into the preexisting diagram for the simple phenomenal description so that the epicycle fits between the zodiacal circle AB\u0393 and its center X and is tangent to the two preset radii XA and X\u0393, which pass to points 50\u00b0 to either side of the zodiacal point B." }, "Technical characteristics": { "Format": "JPEG", "Contributor Type": "", "Collection": "Eastwoodcollection", "Resource Type": "Image", "Contributor Name": "Gerd Gra\u00dfhoff", "Tools": "Digilib", "Date (Update)": "2015", "Size": "1.5 MB" }, "Specific Attributes": { "Holder digital source": "Exzellenzcluster 264 - Topoi", "Origin / Holder object": "Bamberg SB, Ms Class. 18, f.34v", "Inventory Number": "", "Alternate Identifier": "10.17171/1-2-097", "Related Identifier": "" }, "Conditions for use": { "Rights": "Bamberg SB" }, "Annotations": { "Version": "", "Subjects": "" } }, "resources": [ { "thumb": "thumb.jpg", "name": "", "file": "bounded_elongation_of_venus_epicyclic_1-2-097.jpg", "size_bytes": "", "id": 0, "thumb_dir": "http://repository.edition-topoi.org/MAPD/ServiceMAPD/MAPD0097", "metadata": { "General Information": { "DOI": "10.17171/1-2-097-1", "Title": "Diagram MAPD0097", "Creator": "Gerd Gra\u00dfhoff, Hans-Christoph Liess, Domenico Schneider", "Subtitle": "", "Publisher": "edition topoi", "Publication Year": "2015", "Description": "Bounded Elongation of Venus Epicyclic: The manuscript diagrams for this text are often confusing, and it is less easy to categorize them than the diagrams for the previous text, which gives the observational account of Venus's elongation. As the text says, the epicyclic explanation builds upon the immediately preceding text that describes the visible elongation. However, with the positions of X and K already misplaced in most of the diagrams for the prior text, any attempt to add an epicyclic circle for Venus would usually result in further error. Nonetheless, certain scholars of the eleventh century did reconstruct the diagrams correctly from the text. The epicyclical account of Venus's elongation prescribes a circle cutting the zodiacal radius XKB. This radius passes from the earth through the Sun at K, but the distance from X to K is nowhere stated. While it would seem proper to make this radius bisect the epicyclic circle, the location of K is possible at the center of the epicycle, below this center, or completely outside and below the epicycle. The last option would fit Plato's planetary order, which has Venus farther than the Sun from the earth. In any case, Calcidius does not specify the location of K with respect to the epicycle. The main purpose of the epicycle is not to show the order of planets but to show the limited movement of Venus with respect to the Sun, and the account does this. The epicycle \u0394EZH is drawn into the preexisting diagram for the simple phenomenal description so that the epicycle fits between the zodiacal circle AB\u0393 and its center X and is tangent to the two preset radii XA and X\u0393, which pass to points 50\u00b0 to either side of the zodiacal point B." }, "Technical characteristics": { "Format": "JPEG", "Contributor Type": "", "Collection": "Eastwoodcollection", "Resource Type": "Image", "Contributor Name": "Gerd Gra\u00dfhoff", "Tools": "Digilib", "Date (Update)": "2015", "Size": "1.5 MB" }, "Specific Attributes": { "Holder digital source": "Exzellenzcluster 264 - Topoi", "Origin / Holder object": "Bamberg SB, Ms Class. 18, f.34v", "Inventory Number": "", "Alternate Identifier": "10.17171/1-2-097", "Related Identifier": "" }, "Conditions for use": { "Rights": "Bamberg SB" }, "Annotations": { "Version": "", "Subjects": "" } } } ], "assoc_obj_id": "MAPD0097", "id": "0097", "resource_thumbs_baseurl": "MAPD/ServiceMAPD/MAPD0097", "sci_version": "2.0", "tool": "/TOOLS/DGLB0001/Digilib_local.sCi" } } } }