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  • BBC Sky at Night

    DEEP-SKY TOUR

    May 19, 2022 3 minutes

    1 IC 4665

    Ophiuchus is a large ill-defined patch of the early summer sky. Its main form appears as a box with a ‘roof’, the apex marked by Rasalgethi (Alpha (a) Ophiuchui) representing Ophiuchus’s head. The eastern vertex of the roof connects with the box at (Cebalrai (Beta (β) Ophiuchi) and you’ll find our first tour target, the large open cluster IC 4665, 1.3° to the north of this star.

    IC 4665 is a

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