Sharon Tate, the tragic ingénue who epitomized the breezy Hollywood style of the late 1960s, has been gone for nearly five decades, but these days she seems anything but dead.

With the approach of the 50th anniversary of her gruesome 1969 murder at the hands of the Manson family, which to many symbolized the end of the ’60s, Ms. Tate is the subject of three coming films, including Quentin Tarantino’s star-studded “Once Upon a Time in Hollywood,” with Margot Robbie as Ms. Tate.

But fans who cannot wait for the screen bonanza can get their own piece of the Tate legacy on Nov. 17, in an auction of a vast trove of designer clothing and personal possessions at Julien’s Auctions in Beverly Hills, Calif. (Online and telephone bids will also be accepted.)

The artifacts, which have been in the Tate family for five decades, are a boutique’s worth of period fashion collectibles: Betsey Johnson minidresses (estimate: $600 to $800), a black Christian Dior minidress Ms. Tate wore to a film premiere in 1966 ($15,000 to $30,000) and the ivory silk moire minidress from her 1968 wedding to Roman Polanski ($25,000 to $50,000), as well as mod-era sunglasses, scarves and jewelry.