The Visual Multiple System Containing Beta Lyrae.

Beta Lyrae is a member of the visual multiple system ADS 1174S and has five companions which range in magnitude from 7.2 to 15 2. Previous and new astrometric measures of the three brightest companions (B, E, and F) yield motions that are probably consistent with physical association with Lyrae. Spectroscopic measures of these three companions show that one of them (E) is probably not a member. Another companion (B) is a spectroscopic binary, for which orbital elements are derived. Photoelectric measures show that the two faintest companions (C and D) are not physically associated with p Lyrae From the association of companions B and F with p Lyrae we derive a reddening, EB-v, of 0065 mag., a distance modulus of 7.1 mag., and a luminosity, Mv, for p Lyrae of -39. This leads to a secondary mass for p Lyrae that is greater than that of the primary.