Peter Francis Williams is an amateur astronomer from New South Wales, Australia.
He specializes in early detection of declines in R Coronae Borealis-type stars and the long-term monitoring of several southern Mira variables and eclipsing binary stars.
[2] Both discoveries brought him the Nova/Supernova Award of the American Association of Variable Star Observers.
[3] In 2007 he received the Amateur Achievement Award of the Astronomical Society of the Pacific.
[4] He is a life member of the Sutherland Astronomical Society.