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Ptolemaeus

Arabus et Latinus

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Work C.1.16

Regiomontanus
Epitome Almagesti

Text ‘(Venice, BNM, Fondo antico lat. Z. 328) (1r-2r) [preface] Admiranti michi saepenumero vel potius graviter et inique ferenti tam raros esse etate nostra optimarum disciplinarum — et sic reliqua, nisi nos opinio fallit, facile superabunt. (2v) [book i] Epitoma primi libri Ptolemaei. Recte profecto meo iudicio nobiliores philosophi, o Syre, distinxerunt inter theoricam philosophie et practicam partem — quod postremo hoc in theoreumate explorare et coepto labori modum statuere decrevimus. Finis terciidecimi. (2v-12r) [book i] Epitoma primi libri Ptolemaei. Recte profecto meo iudicio nobiliores philosophi, o Syre, distinxerunt inter theoricam philosophie et practicam partem — Patet igitur veritas corolarii atque usus eius. Finis primi. (12r-20v) [book ii] Incipit secundus. In orizonte obliquo latitudinem ortus dati puncti ecliptice per arcum semidiurnum — scilicet angulus aht, notus fiet, qui querebatur. Finis secundi. (21r-31r) [book iii] Tercius incipit. Ingressum Solis in punctum equinoctii instrumenti adiutorio colligere — et a differentibus minuenda ut tempus mediocre proveniat. Finis tercii. (31v-38v) [book iv] Quartus incipit. Verum locum Lune in ecliptica certius per eclipses lunares quam instrumenta — inter centrum mundi et centrum epicicli reperiret. Finis quarti. (39r-50r) [book v] Quintus incipit. Instrumentum armillarum componere. Due armille decentis et eiusdem magnitudinis superficierum — qua omnia cum precisione possent inveniri. Finis quinti. (50v-61r) [book vi] Sextus incipit. Quo pacto tempus et locus medie coniunctionis luminarium reperiatur — quare arcus oh notus, qui querebatur. Finis sexti. (61v-66r) [book vii] Septimus incipit. Quod stele fixe zodiaci non modo inter se verum etiam ad eas que extra zodiacum sunt stellas distantiam — versus alterum removeantur polorum cognitas fieri necesse est. Finis septimi. (66v-72v) [book viii] Octavus incipit. Viam Lacteam per stellas quae in ea sunt notabiliores describere — accipias angulum occidentalem orizonte et ecliptica comprehensum. Finis octavi. (73r-82v) [book ix] Nonus incipit. Spherae celestes quo ordine habende sint ostendere — si que excreverint, revolucionibus habebis radicem cupitam. Finis noni. (83r-91v) [book x] Decimus incipit. Diameter ecentrici Veneris per longitudinem longiorem eius atque propiorem transiens — satis erit pro medio motu planete in longitudine radicem statuisse. Finis decimi. (92r-100r) [book xi] Undecimus incipit. Ad occasiones diversi motus Iovis quibusdam preambulis pervenire — Hec de angulis diversitatum breviter perstringere libuit. Finis undecimi. (100v-105r) [book xii] Duodecimus incipit. Si planetis altioribus unicam posueris diversitatem, epiciclus in concentrico aut ecentricus — Geminis nisibus pertingere non tua te deterreat socordia. Finis duodecimi. (105v-117r) [book xiii] Terciusdecimus. Latitudinibus trium superiorum viam speculationis aperire — quod postremo hoc in theoreumate explorare et cepto labori modum statuere decrevimus. Finis terciidecimi.

Content ‘The finest textbook of Ptolemaic astronomy ever written’ (Swerdlow).

Origin Completed in 1461-1462 by Regiomontanus after Peurbach’s premature death in 1461. This work was commissioned by Cardinal Bessarion.

Bibl. E. Zinner, Regiomontanus: His Life and Work, Amsterdam-New York-Oxford-Tokyo, 1990 (tr. with additions of Leben und Wirken des Joh. Müller von Köningsberg, genannt Regiomontanus, Osnabrück, 1968), 51-55 and 213-214; A. Rigo, ‘Bessarione, Giovanni, Regiomontano e i loro studi su Tolomeo a Venezia e Roma (1462-1464)’, Studi Veneziani, N. S. 21 (1991), 49-110: 77-92; A. Rigo, ‘Gli interessi astronomici del cardinal Bessarione’, in Bessarione e l’Umanesimo. Catalogo della mostra, eds G. Fiaccadori, A. Cuna, A. Gatti, S. Ricci, Napoli, 1994, 105-117: 109-113; J. S. Byrne, The Stars, the Moon, and the Shadowed Earth: Viennese Astronomy in the Fifteenth Century, PhD dissertation, Princeton University, 2007, 156-167; H. Zepeda, The Medieval Latin Transmission of the Menelaus Theorem, PhD Dissertation, University of Oklahoma at Norman, 2013, 334-339; M. Shank, ‘Regiomontanus and Astronomical Controversy in the Background of Copernicus’ in Before Copernicus. The Culture and Contexts of Scientific Learning in the Fifteenth Century, eds R. Feldhay, F. J. Ragep, Montreal-London-Chicago, 2017, 79-109: 87-98.

Ed. ---

EDS

Venice, Johannes Hamman, 1496, sig. a2r-[p7]v

Basel, Henricus Petrus, 1543, sig. 1-267

Nürnberg, Johannes Montanus & Ulricus Neuberus, 1550, sig. A4r-[Tvi]v

MSS

Bologna, BCA, A. 38, s. XV, f. 1r-164v

Cracow, BJ, 595, s. XV, f. 12r-155r

Florence, BNC, Conv. Soppr. G.I.1690, s. XV, f. 1r-146r

Florence, BNC, Magliabech. XI.144, s. XV, f. 24v-105v

Jena, TULB, El. f. 73, s. XVI, f. 8r-9r, 138r and 179r-180rb

Naples, BN, VIII C 40, s. XV, f. 1r-172v

Paris, BnF, lat. 5787, s. XV-XVI, f. 80r-213r

Vatican, BAV, Barb. lat. 156, s. XV, f. 1r-145v

Vatican, BAV, Vat. lat. 11573, s. XV, f. 1r-155v

Venice, BNM, Fondo antico lat. Z. 328 (1760), s. XV, f. 1r-117vImages|Text

Venice, BNM, Fondo antico lat. Z. 329 (1843), s. XV, f. 39r-213r

Vienna, ÖNB, 44, s. XV, f. 1r-136r