From Phillips’s release:

Phillips is pleased to announce that Brice Marden’s Star (for Patti Smith) will lead the May evening sale of 20th Century and Contemporary Art in New York. Since its completion in 1974, Star (for Patti Smith) has been exhibited in several renowned institutions, including the Solomon R. Guggenheim Museum, Boston’s Museum of Fine Arts, the Museum of Modern Art in New York, and the Museum of Fine Arts, Houston. The triptych remained part of Marden’s own collection for many years until it was acquired by the present owner from the Matthew Marks Gallery. Estimated at $5,000,000-7,000,000, Star (for Patti Smith) is one of the few portraits by the artist to be offered at auction.