Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
तन्मध्ये स्थापयेच्छंकुं कल्पना द्द्वादशांगुलम् । तच्छायाग्रं स्पृशेद्यत्र दत्तं पूर्वापराह्णयोः ॥ १२९ ॥
tanmadhye sthāpayecchaṃkuṃ kalpanā ddvādaśāṃgulam | tacchāyāgraṃ spṛśedyatra dattaṃ pūrvāparāhṇayoḥ || 129 ||
在所标之处的中央,应依传统立一根测影直桩(gnomon),长十二指宽。其影尖于上午与下午所触之处,即当标记为点。
Narada (teaching in a technical-practical instruction style within Moksha-dharma context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It emphasizes kāla-śuddhi (purity/accuracy of time): righteous acts like dāna and daily observances become more effective when performed at properly determined times.
By teaching precise discipline in daily conduct and offerings, it supports steady devotional life—bhakti is strengthened when worship and charity are aligned with proper time and order.
Jyotiṣa/Vedāṅga-based time determination using a chaṅku (gnomon): marking the shadow-tip in the forenoon and afternoon to establish reference points for timing rites.