On comets (ketu) - Verse 58

If the stars of the constellation of Viśākhā should be dimmed by the tails of or appear to be in contact with malefic comets, the ruler of Ikṣvāku and of Alaka will perish; if those of Anurādhā , the ruler of Puṇḍra will perish; if those of Jyeṣṭhā the chief emperor will suffer.