पञ्चसिद्धान्तिका (आचार्य वराहमिहिर - सूर्य, रोमक, पौलिश, वासिष्ठ एवं पितामह सिद्धान्त)

Chapter Six (VĀSIṢṬHA-) PAULIŚA-SIDDHĀNTA: LUNAR ECLIPSE ६. षष्ठोऽध्यायः वासिष्ठ-पौलिश-सिद्धान्तौ — चन्द्रग्रहणम् Introductory This chapter deals with the lunar eclipse. Nothing is given in the colophon at the end of the chapter about the Siddhānta to which this belongs. This cannot belong to the Saura for the lunar eclipse of the Saura is dealt with in Chapter X. The Sun, Moon and Rāhu of the Romaka are given in Chapter VIII, and in the same chapter the solar eclipse according to that Siddhānta occurs, and its lunar eclipse cannot be given here, earlier. Also, the method here does not have the refinement of the Romaka solar eclipse. So this chapter cannot belong to the Romaka. That it may belong to the Paitāmaha is out of question, since only the mean Sun and the Moon, and that very crudely, being given by the Paitāmaha, and Rāhu is not given. Also, the Siddhānta occupies a later chapter, the twelfth. This leaves the Vāsiṣṭha and the Pauliśa for consideration. Perhaps it belongs to both com- bined, as we have observed in the case of their Moon and its daily motion. It cannot belong to the Vāsiṣṭha separately for the Vāsiṣṭha does not give Rāhu, which we have to get from the Pauliśa. Also, it cannot belong to Pauliśa separately, for then at least part of the computation, like the duration of the eclipse will become redundant, because the duration of the lunar eclipse with its limits occurs in chapter VII also, together with the computation of the solar eclipse, which from the colophon and from the nature of the method given, must belong to the Pauliśa. Also, details usually given in connection with eclipses, like the direction of contacts, colour etc. are found only here in the VI chapter. Therefore we can conclude that chapters VI and VII belong both to the Vāsiṣṭha and the Pauliśa, and that the solar eclipse in the VII chapter belongs to the Pauliśa. [समकलौ चन्द्रसूर्यौ] नै(श्या) स्तिथिनाड़्योऽर्के देया (श्चान्द्रे) समेन्दुरवि (वि) वरात् । (दिवसोद्भवश्च) शोध्याः स भवति तत्कालशशिलिप्तः ॥ १ ॥ Sun and Moon of equal longitude

1. Minutes of arc equal to the nāḍīs of the full moon-tithi to go, after sunset, are to be added to the Sun, (which has been computed for sunset). Minutes of arc equal to the nāḍīs to go from the end of the full moon or new moon-tithi in the day-time upto sunset are to be so added to the Sun. Thus corrected, the Sun becomes equal to the Moon in (degrees and) minutes at the end of the full or new moon-tithi, (i.e. at full or new moon). The idea is that by thus finding the Sun, we can, without any trouble, get the Moon, for, if new moon, the Sun thus got is the Moon and, if full moon, the Sun plus 6 rāśis is the Moon.