1928 Summa

1928 Summa is a main-belt asteroid discovered by Vaisala in Turku in 1938. Binzel (1987) reported a period of 9.66 h. The LCDB rated this U = 1. A total of 843 data points were obtained using a clear filter over five nights during the period 2012September 3-10, with an average magnitude of 15.2 and average SNR of 83. The lightcurve shows a period of 6.8549 ± 0.0006 h and amplitude of 0.18 ± 0.01 mag. These findings were published in the Minor Planet Bulletin, Volume 40, Number 1, 2013January - March.