The 32-YEAR Cycle in
Anthony D. Mallama
Corporation, Silver Spring, MD 20910
Five new photoelectrically
times minima of Algol are reported, JD (hel.) 2443909.6538 , 2444167.7182,
2444236.5321, 2444560.5340, and 2444623.6180. The ephermis of Friesboes-Conde,
Herczeg, and Hog (2434705.5493 + 2.86732442Ed) is still a good predictor if a
correction term with 32-year periodicity is added.
Apsidal motion is
eliminated as the cause for the 32-year periodicity in the times of primary
minimum because times of secondary minimum derived from obsrvations in the
literature do not fit that model, the deviation being at least 6 sigma.
Likewise the 32-year effect appears to be unrelated to asymmetry in the light
curve, at more than a 3 sigma confidence level.