VULGATE ONLY. Verbatim from Sanskrit Wikisource, Rāmāyaṇam / Bālakāṇḍam / Sargaḥ 18, verse 9 (fetched via action=raw). The Critical Edition sarga 1.17 does not contain it. Vulgate sarga 18 = CE sarga 17.
Rāma's birth-star, named periphrastically by its presiding deity: 'in the asterism whose deity is ADITI' = Punarvasu, whose devatā is Aditi in every nakṣatra-devatā list. Griffith's note is explicit: 'Aditi, the mother of the Gods, is lady of the seventh lunar mansion which is called Punarvasu.' CRITICAL TEXTUAL POINT, and the reason this is recorded separately: THE VERSE IS NOT IN THE CRITICAL EDITION. The GRETIL Critical Edition text at R_1,017.006 reads simply 'kausalyājanayad rāmaṃ divyalakṣaṇasaṃyutam' with no date, no lagna and no nakṣatra, and a search of the whole CE file for 'aditidaivat' returns zero hits. The astrological frame — Caitra, the ninth tithi, the Aditi-asterism, five planets exalted, Cancer rising, Jupiter with the moon — belongs to the vulgate (Bāla Kāṇḍa 18.8-10), quoted here from Sanskrit Wikisource. The same vulgate passage gives Bharata's Puṣya and the twins' Sārpa (18.15). Anyone citing 'Rāmāyaṇa Bāla 18' for Rāma's birth-star must say they are citing the vulgate.