Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
With the first dawn of information as to Italy Diomedes begins to wander in the Adriatic, and Odysseus in the Tyrrhene Sea;(18) as indeed the latter localization at least was naturally suggested by the Homeric conception of the legend.
18. Cf. I. X. Relations of the Western Italians to the Greeks
Down to the times of Alexander the countries on the Tyrrhene Sea belonged in Greek fable to the domain of the legend of Odysseus; Ephorus, who ended his history with the year 414, and the so-called Scylax (about 418) still substantially follow it. Of Trojan voyages the whole earlier poetry has no knowledge; in Homer Aeneas after the fall of Ilion rules over the Trojans that remained at home.
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Reference address : https://www.ellopos.net/elpenor/rome/2-09-art-science.asp?pg=19