R-CORONAE-BOREALIS AND DELTA-CORONAE BOREALIS IN 1990

UBV photometry of R CrB and delta-CrB has been obtained through the APT Service on 71 nights in 1990. R CrB proved to be near maximum light during this time and showed its usual single period of 44.6 +/- 0.6 days. delta-CrB, a chromospherically active star that was essentially constant in 1989, showed renewed variability in 1990 with an amplitude of about 0.04 mag in V and a period of 60.8 +/- 1.7 days, similar to its behavior two years earlier.