Table II from Popper (1983) Radial Velocities of ZZ Boo HJD Phase V1 (O-C)1 V2 (O-C)2 (2400000+) km/s km/s km/s km/s 40227.039 0.2726 -117.9 +0.9 +62.5 +0.2 40338.831 0.6680 +49.2 +0.3 -111.8 -1.2 40376.732 0.2607 -120.9 -1.4 +62.6 -0.4 40573.076 0.5943 +22.5 +1.8 -79.7 +1.9 40638.053 0.6111 +27.4 -1.0 -91.2 -1.8 40638.986 0.7980 +57.7 +1.0 -118.0 +0.6 40660.944 0.1969 -116.3 -1.7 +56.7 -1.3 40660.965 0.2011 -115.1 +0.3 +59.5 +0.7 40691.905 0.3993 -83.0 -0.1 +25.1 -0.2 40691.917 0.4017 -79.5 +2.3 +25.7 +1.5 40730.706 0.1723 -111.0 -1.9 +50.5 -1.8 40730.715 0.1741 -108.3 +1.2 +51.8 -1.0 40731.829 0.3973 -86.2 -2.4 +23.6 -2.7 40731.838 0.3991 -82.7 +0.3 +25.9 +0.5 40733.776 0.7873 +57.1 -1.2 -121.0 -0.8 40733.782 0.7885 +56.2 -2.0 -121.6 -1.5 40751.737 0.3854 -90.5 -1.5 +31.0 -0.6 40751.746 0.3872 -89.5 -1.3 +29.8 -1.0 40785.709 0.1910 -113.6 -0.1 +58.2 +1.4 40785.718 0.1928 -111.4 +2.5 +58.9 +1.7 40996.020 0.3227 -111.2 -0.7 +54.1 +0.4 40996.032 0.3251 -110.1 -0.2 +52.9 -0.2 41117.782 0.7153 +61.7 +3.2 -119.1 +1.4 41117.792 0.7173 +62.2 +3.4 -119.4 +1.4 41172.654 0.7078 +58.9 +1.4 -118.9 +0.6 41172.667 0.7104 +57.6 -0.3 -118.7 +1.2 41172.677 0.7124 +58.8 +0.6 -118.0 +2.1 41317.019 0.6284 +36.5 +0.9 -99.4 -2.5 41317.043 0.6332 +41.1 +3.7 -101.0 -2.2 41318.077 0.8404 +44.6 -2.0 -108.7 -0.5 41318.094 0.8438 +44.1 -1.4 -106.2 +0.9 41402.908 0.8346 +45.9 -2.4 -112.0 -2.0 41402.936 0.8402 +46.0 -0.6 -106.6 +1.7 41404.911 0.2358 -118.3 +1.0 +62.1 -0.7 41404.919 0.2374 -118.7 +0.7 +63.5 +0.6 41429.942 0.2503 -118.6 +1.0 +63.1 -0.1 41429.951 0.2521 -117.9 +1.7 +65.8 +2.6 41430.770 0.4162 -76.1 -1.2 +17.4 +0.4 42175.700 0.6480 +42.5 -0.3 -103.4 +0.9 42175.715 0.6511 +41.2 -2.6 -105.4 -0.1 42176.731 0.8546 +40.1 -1.8 -103.8 -0.4 42176.757 0.8598 +40.0 -0.1 -101.2 +0.3