Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
केतुः पंचदशे दंड उल्का एकोनविंशतौ ।निर्घातपातसंज्ञश्च ज्ञेयः स नवपंचमे ॥ २३१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 231.
... is Ketu. The 15th is Danda. The 19th is Ulka. The one named Nirghatapata is known in the 14th.
Simple meaning: Counting on: Ketu is the 18th, Danda the 15th, Ulka the 19th, Nirghatapata the 14th.
मोहनिर्घातकं पाश्च कुलिशं परिवेषणम् ।
From the 21st star on, five more omens follow in order.
चन्द्रयुक्तेषु भेष्वेषु शुभकर्म न कारयेत् ।
No good act when the Moon is in these omen stars. A count from the Sun's star begins.
सविष्णुभेषु क्रमशो हस्तभाच्चंद्रसंयुतः ।
Count from the Sun's star to certain stars. The same count from Hasta gives a bad Moon star.