How authentic is the Hadith: "I was born with the Simāk [Pleiades/Hyades]"? And who narrated it?

The aforementioned term regarding the birth signs of prophets has not been reported in the books of Sunnah. Al-Zamakhshari mentioned it in "Rabee' Al-Abrar" without a chain of narration (sanad), where he stated: "Some astrologers said: 'The birth signs of prophets are Virgo and Libra, and the rising sign of the Prophet, peace be upon him, was Libra.' He also said: 'I was born under Al-Simak' — and in the calculations of astrologers, it is Al-Simak Al-Ramih (Arcturus)."