JMNT(i)
7 Thereupon Herod, at that time, secretly and covertly calling the "great ones" (the magi), ascertained accurately (exactly) from them the time (= the date) of the star's continued appearing and shining (or: of the appearing star; = How long has the star been appearing since its rising in the East? [Vincent's rendering is similar]).
8 So then, sending them into Bethlehem, he said, "As you are going on your way, you men make a diligent search for [him] and inquire exactly concerning the little boy, while examining [the situation]. Now whenever (or: as soon as) you may find [him], report back to me so that, upon coming, I also can myself do it obeisance (or: pay homage to him)."