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Taurus Poniatovii (Latin for Poniatowski's bull) was a constellation created by former rector of Vilnius University Marcin Odlanicki Poczobutt in 1777 to honor Stanislaus Poniatowski, king of Poland. It consisted of stars that are today considered part of Ophiuchus and Aquila. It is no longer in use. It was wedged in between Ophiuchus, Aquila and Serpens Cauda. However, depiction of the constellation can still be found in Vilnius on the wall of the Vilnius University Astronomical Observatory.
The stars were picked for the resemblance of their arrangement to the Hyades group which form the "head" of Taurus. Before the definition of Taurus Poniatovii, some of these had been part of the obsolete constellation River Tigris.
The brightest of these stars is 72 Oph (3.7 magnitude) in the "horn" of Taurus Poniatovii. The "face" of Taurus Poniatovii is formed by 67 Oph (4.0), 68 Oph (4.4) and 70 Oph (4.0). The five brightest stars belong to loose open cluster Collinder 359 or Melotte 186. Barnard's star is also inside the boundaries of this former constellation. Some minor stars (5th and 6th magnitude) now in Aquila formed the "rear" of Taurus Poniatovii.