Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
मणिहारस्तुवर्णाभा दीप्तिमंतोऽर्कसूनवः ।केतवश्चोदिताः पूर्वापरयोर्नृपहानिदाः ॥ ९९ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 99.
The sons of the Sun shine like a jewel necklace and gold. These comets, rising in the east or west, may bring loss to kings.
Simple meaning: Bright gold-like comets born of the Sun, seen in the east or west, can bring loss to kings.
वंसुकबिंबक्षितिजच्छुकतुंडादिसन्निभाः ।
Red comets like flowers, fruit, blood or a parrot's beak are born of fire and give results.
भूसुता जलतैलाभा वर्तुलाः क्षुद्भयप्रदाः ।
Round comets born of the Earth can bring fear of hunger. White comets born of the Moon bring plenty.
पितामहात्मजः केतुस्त्रिवर्णस्त्रिदशान्वितः ।
Brahma's three-coloured comet, the Brahmadanda, is said to put many lives at risk.