Grahana and vyatipata. Uparagakriyakrama, in about 130 verses, is a full-fledged work by Acyuta on the computation of the lunar and solar eclipses and is divided into four chapters dealing with Parvantasādhana, Somagrahaņa, Sūrjyagrahaņa and Chāyā. A shroter work in twenty verses, entitled Uparagavirnsati, bearing close relationship to the Uparagakriyakrama in the matter of methods and procedures and the numerical figures used, is likely to be another work of our author, though there is no specific ascription in the work to that effect. The Chayastaka, in eight verses, is a short work giving the method for the accurate computation of the gnomon's shadow due to the Moon.
Acyuta is the author, also, of two works on horoscopical astrology, viz., Horasaroccaya, being a résumé, in seven chapters, of the Jatakapaddhati of Sripati, and an original work entitled Jatakabharana, in eight chapters.
On the expositional side, Acyuta has commented in Sanskrit on his own Sphutaniraaya and Karagottama, and in Malayalam on the Veņvaroha of Saňgamagrāma Mādhava and the Surya siddhānta.”
Acyuta's astronomical lineage
A matter of importance equal to that of Acyuta's direct contributions is the trail lighted by him towards the continuance of astronomical studies in the land. Appendices I-IX added to the
l. Mss. : Kerala Univ. Or. Res. Inst. and Mss. Library, Trivandrum, Nos. 4(4-A, 404-B, CM ) 73-G, CM. 531-A, B, CM. 628-B ; with K. V. Sarma.
2. Ed. with an early Malayalam commentary by Rama Varma Maru ThamPuran in the periodical Sri Ravi Varna Sanskrita Ganthavali, 2 (1954) i-iii, pp. 16.
3. Ed. below, as Appendix X on the basis of its only known manuscript.
4. Mss. : Kerala Univ. Or. Res. Inst. and Mss. Library, Nos. 8327-A, and 8327-B, the latter with a Malayalam commentary, which is sometimes attributed to the author himself, but which does not seem to be so.
5. Mss. : Kerala Univ. Or. Res. Inst. and Mss. Library, No. C. 2139-A. The authorship is suggested not on direct evidence but on the basis of the occurrence, at the beginning of the work, of a characteristic invocatory verse of Acyuta.
6. Critically ed. with intro. and exposition of rationale, by K. V. Sarma, Govt. Sanskrit College, Tripunithura, 1956.
7. Mss. : Kerala Univ. Or. Res. Inst. and Mss. Library, Nos. 3636-C, 8358-A and T. 251. Here, too, the ascription of the work to Acyuta is based on his characteristic invocatory versę.
