Stars in the Pleiades in Ptolemaios (red) and UlughBeg (blue), together with stars according to the modern Hipparcos Catalogue (open circles). (See Figs. B.23 and B.24.) For comparison purposes the positions of these stars and of stars from UlughBeg have been converted to the epoch of Hipparcos/Ptolemaios, with modern precession equations. Solid lines indicate our identifications, dash-dotted lines the identifications by Toomer (1998) and Knobel (1917), when these differ from our identifications.