Table 18 from Struve (1945) Radial Velocities of AO Monocerotis Plate Date UT Phase Ca II He I H G f/2 1945 (days)(period) RV1 RV2 RV1 RV2 5039 Feb. 3 3:30 0.985 0.523 +48.7 +10.0 +61.1 5040 3 4:00 1.006 0.534 +41.1 +6.3 +32.5 5041 3 4:33 1.029 0.546 +37.2 -22.2 +61.0 5056 4 4:45 0.152 0.081 +30.0 +107.6 +48.7 5073 6 2:48 0.187 0.099 +40.1 +51.6 +56.1 5074 6 3:22 0.210 0.111 +59.0 +187.3 +53.7 5075 6 3:54 0.232 0.123 +36.2 +136.4 -6.3 5094 7 3:18 1.207 0.640 +54.7 -98.6 -46.0 +187.9 5095 7 3:49 1.229 0.652 +31.8 -120.4 +190.0 -75.4 +180.4 5112 8 2:47 0.301 0.160 +1.9 +167.3 -137.0 -109.3 +160.6 5113 8 3:17 0.322 0.171 +28.5 +177.7 -115.9 +188.0 5133 9 3:30 1.331 0.706 +24.2 -156.4 +168.7 -93.0 5134 9 3:53 1.347 0.715 +31.0 -168.7 +193.0 +150.9 5154 10 3:12 0.433 0.230 +42.1 +233.5 -167.0 -105.6 +225.5 5155 10 3:36 0.450 0.239 +34.6 +159.5 -6.8 5166 11 4:39 1.494 0.793 +34.1 -163.8 +209.5 -63.8 5167 11 5:03 1.510 0.801 +49.3 -167.5 +249.4 +239.8 -126.0 5186 13 4:27 1.600 0.849 +22.7 -146.4 -55.0 +227.4 5187 13 4:50 1.616 0.857 +29.5 -112.9 +197.8 +147.6 -91.7 5188 13 5:21 1.638 0.869 +22.5 -89.0 +171.1 +199.8 -38.4 5225 15 4:52 1.734 0.920 +44.0 -54.0 +102.8 5226 15 5:15 1.750 0.929 +32.5 +8.3 +95.6 5227 15 5:38 1.766 0.937 +32.5 -49.6 +53.3 5252 17 6:08 0.017 0.009 +5.5 -7.9 5253 17 6:32 0.033 0.018 +31.6 +55.7 +71.2 5267 18 4:44 0.958 0.508 +35.2 +41.3 +63.4 5272 19 4:42 0.072 0.038 +21.7 +30.3 5273 19 5:12 0.093 0.049 +27.1 +105.0 +22.0 5274 19 5:57 0.124 0.066 +50.0 +95.5 +34.9 5288 20 4:46 1.075 0.570 +42.2 -106.0 +84.9 5289 20 4:57 1.082 0.574 +30.7 -26.7 +72.8 5290 20 5:26 1.102 0.585 +45.9 -36.2 +65.5 5304 21 4:53 0.195 0.103 +26.4 +106.4 +3.1