Brihat Samhita
आधूम्रया तु शिखया दर्शनं आयाति कृत्तिकासंस्थः । ज्ञेयः स रश्मिकेतुः श्वेतसमानं फलं धत्ते ॥ ११-४० ॥
Raśmi Ketu is a comet possessing a tail slightly coloured like smoke; it appears in the constellation of Kṛttikā. The effects are the same as those assigned to Sveta Ketu.
english translation
AdhUmrayA tu zikhayA darzanaM AyAti kRttikAsaMsthaH । jJeyaH sa razmiketuH zvetasamAnaM phalaM dhatte ॥ 11-40 ॥
hk transliteration by Sanscript