COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     Number 912

                                        Konkoly Observatory
                                        Budapest
                                        1974 July 25


              THE PERIOD OF LR SAGITTARII

    A recent discussion of LR Sgr by Vidal (1974) points out
the need for more observations to establish the period. I have
estimated the brightness on some 400 photographs obtained at
the Maria Mitchell Observatory from 1957 to the present. A 
period of 275 days satisfies these observations as well as the
early date of maximum JD 18885 published in the GCVS and the
1954-55 observations, near minimum, in the Lick Atlas. Maxima
on the Nantucket plates occurred on or near the following Julian 
days: 36750, 37580, 37875, 40070, and 41450. These observations 
span 22 epochs while the early Innes maximum occurred 63
cycles earlier. Mean magnitude at maximum, according to the 
sequence for V 1017 Sgr by McLaughlin (1946) as revised by Vidal
and Rodgers (1974) is about 13.8pg.


                           DORRIT HOFFLEIT
                    Maria Mitchell Observatory
                     Nantucket, Mass., U.S.A.


References:

McLaughlin, Dean B. 1946, P.A.S.P., 86, 46. [BIBCODE 1946PASP...58...46. ]
Vidal, N.V. 1974, P.A.S.P. 86, 308. [BIBCODE 1974PASP...86..308V ]
Vidal, N.V. and Rodgers, A.W. 1974, P.A.S.P. 86, 26. [BIBCODE 1974PASP...86...26V ]