too long by nearly three minutes and a half; but the moon's revolution is right within a second; those of Mercury, Venus and Mars within a few minutes; that of Jupiter within six or seven hours; that of Saturn within six days and a half". The Surya Siddhanta was one of the two books in Sanskrit translated into Arabic during the reign of 'Abbasid caliph al-Mansur (). According to Muzaffar Iqbal, this translation and that of Aryabhata was of considerable influence on geographic, astronomy and related Islamic scholarship. Editions The Súrya-Siddhánta, an antient system of Hindu astronomy ed. FitzEdward Hall and Bápú Deva Śástrin (1859). Translation of the Sûrya-Siddhânta: A text-book of Hindu astronomy, with notes and an appendix by Ebenezer Burgess Originally published: Journal of the American Oriental Society 6 (1860) 141–498. Commentary by Burgess is much larger than his translation. Surya-Siddhanta: A Text Book of Hindu Astronomy translated by Ebenezer Burgess, ed. Phanindralal Gangooly (1989/1997) with a 45-page commentary by P. C. Sengupta (1935). Translation of the Surya Siddhanta by Bapu Deva Sastri (1861) , . Only a few notes. Translation of Surya Siddhanta occupies first 100 pages; rest is a translation of the Siddhanta Siromani by Lancelot Wilkinson. Commentaries The historical popularity of Surya Siddhanta is attested by the existence of at least 26 commentaries, plus another 8 anonymous commentaries. Some of the Sanskrit-language commentaries include the following; nearly all the commentators have re-arranged and modified the text: Surya-siddhanta-tika (1178) by Mallikarjuna Suri Surya-siddhanta-bhashya (1185) by Chandeshvara, a Maithila Brahmana Vasanarnava (c. 1375-1400) by Maharajadhiraja Madana-pala of Taka family Surya-siddhanta-vivarana (1432) by Parameshvara of Kerala Kalpa-valli (1472) by Yallaya of Andhra-desha Subodhini (1472) by by Ramakrishna Aradhya Surya-siddhanta-vivarana (1572) by Bhudhara of Kampilya Kamadogdhri (1599) by Tamma Yajvan of Paragipuri Gudhartha-prakashaka (1603) by Ranganatha of Kashi Saura-bhashya (1611) by Nrsimha of Kashi Gahanartha-prakasha (IAST: Gūḍhārthaprakāśaka, 1628) by Vishvanatha of Kashi Saura-vasana' (after 1658) by Kamalakara of Kashi Kiranavali (1719) by Dadabhai, a Chittpavana Brahmana Surya-siddhanta-tika (date unknown) by Kama-bhatta of southern India Ganakopakarini (date unknown) by Chola Vipashchit of southern India Gurukataksha' (date unknown) by Bhuti-vishnu of southern India Mallikarjuna Suri had written a Telugu language commentary on the text before composing the Sanskrit-language Surya-siddhanta-tika in 1178. Kalpakurti Allanarya-suri wrote another Telugu language commentary on the text, known from a manuscript copied in 1869. See also Hindu units of measurement Indian science and technology References Bibliography K.