PAL

Ptolemaeus Arabus et Latinus

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Work C.1.33

Anonymous
في استخراج دقائق حصص اختلاف منظر القمر
Fī Stikhrāj daqāʾiq ḥiṣaṣ ikhtilāf manẓar al-qamar

Full title: Risāla fī stikhrāj daqāʾiq ḥiṣaṣ ikhtilāf manẓar al-qamar al-mustaʿmala fī l-Majisṭī.

A short treatise on Ptolemy’s method to calculate the lunar parallax from Almagest V.17, including a single diagram. It is possible that this is a chapter of an originally larger treatise, perhaps from the same work as some of the other anonymous tracts in the same witnesses (e.g., C.1.31 and C.1.32).

Text: [Istanbul, Topkapı, Hazine 455]

(79r–80r) لتكن دائرة ا ب ج على مركز د من دوائر الارتفاع وقطر ادح تمرّ بسمت الرأس ومركز العالم وعليه البصر وليكن نقطة ه أعني سطح الأرض — إذا كان مركز التدوير على القطر في الحالتين جميعًا وبعد القمر من دروة التدوير بعد واحد مساوٍ ولضعف ما بين المركزين وهذه العضية ظاهرة والله أعلم.

Bibl.: GAS VIFuat Sezgin, Geschichte des arabischen Schrifttums, Vol. VI: Astronomie bis ca. 430 H., Leiden: Brill, 1978, p. 94 (no. 30).

Ed.: None.

MSS