Via the New York Times:
In his 1988 memoir, Donald T. Regan, a former chief of staff for President Ronald Reagan, revealed what he called the administration’s “most closely guarded secret.” He said an astrologer had set the time for summit meetings, presidential debates, Reagan’s 1985 cancer surgery, State of the Union addresses and much more. Without an O.K. from the astrologer, he said, Air Force One did not take off. The astrologer, whose name Mr. Regan did not know when he wrote the book, was Joan Quigley. She died on Tuesday at 87 at her home in San Francisco, her sister and only immediate survivor, Ruth Quigley, said. Mr. Regan said that Miss Quigley — a Vassar-educated socialite who preferred the honorific Miss to Ms. (she never married) — had made her celestial recommendations through phone calls to the first lady, Nancy Reagan, often two or three a day. Mrs. Reagan, he said, set up private lines for her at the White House and at the presidential retreat at Camp David.
Quigley was introduced to the Reagans by Merv Griffin.