Graha–Ketu–Utpāta Lakṣaṇas: Solar/Lunar Omens, Comets, Eclipses, and Calendar Rules
सुभिक्षकृत्कौमुदाख्यः केतुः कुमुदसन्निभः । आवर्तकेतुसंध्यायां शशिरो नेष्टदायकः ॥ १०८ ॥
subhikṣakṛtkaumudākhyaḥ ketuḥ kumudasannibhaḥ | āvartaketusaṃdhyāyāṃ śaśiro neṣṭadāyakaḥ || 108 ||
Ketu bernama Kaumuda mendatangkan panen melimpah dan tampak putih laksana teratai air. Namun pada senja yang ditandai Ketu berpusar (āvarta), Sang Bulan memberi hasil yang tidak diinginkan.
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: adbhuta
Secondary Rasa: bhayanaka
It frames celestial phenomena as dharmic indicators: some omens support well-being (subhikṣa), while others warn of adverse outcomes, encouraging vigilance and right conduct.
Indirectly: by highlighting inauspicious periods, it implies the devotee should intensify sādhana—japa, pūjā, and Viṣṇu-smaraṇa—rather than be careless when signs indicate disorder.
Jyotiṣa (Vedāṅga astrology/omenology): classification of Ketu-comet appearances and their predicted effects, especially when occurring at saṃdhyā (twilight) in relation to the Moon.