Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s5.8

v2.c12.s5.8

Purport.—The Paitāmaha comet re-appears after travelling for 500 years (i.e. disappears for 500 years, after it is first seen and then appears again). The comet named Uddālaka Śvetaketu appears after travelling for 110 years. The comet Kāśyapaśvetaketu whose tail is pointed like a spear, and who, after the disappearance of the comet Padmāketu, first appears in the East, after having travelled for 1500 years, and who, after contacting the Brahma (Abhijit) constellation, the Pole star, the Brahmarāśi* and the Great Bear, traverses the third part of the sky, turns to the left and gives plenty of crops for as many years as the number of months it remains visible in the sky, with its semi-circular tuft of hair. Vibhāvasujarāśmiketu, after having travelled for 100 years, makes its appearance near the Kṛttikā stars after the Āvartaketu. It has a tail of smoke.