--------------------------- Sky Statistics at ESO Sites --------------------------- Column1=month index since January 1983 Column2=monthly fraction of photometric nights at Paranal Column3=monthly fraction of photometric nights at LaSilla 9 0.930 0.570 10 0.940 0.680 11 1.000 0.500 12 0.970 0.580 13 0.610 0.680 14 0.760 0.790 15 0.810 0.680 16 0.900 0.800 17 0.840 0.420 18 0.770 0.230 19 0.770 0.350 20 0.810 0.480 21 0.900 0.330 22 0.550 0.580 23 1.000 0.770 24 0.900 0.710 25 0.940 0.810 26 0.820 0.960 27 0.840 0.770 28 0.930 0.830 29 0.770 0.520 30 0.630 0.270 31 0.870 0.320 32 0.810 0.390 33 1.000 0.630 34 0.870 0.230 35 0.670 0.630 36 0.740 0.680 37 0.770 0.940 38 1.000 0.820 39 0.900 0.840 40 0.900 0.700 41 0.710 0.260 42 0.700 0.270 43 0.840 0.550 44 0.710 0.230 45 0.930 0.630 46 0.770 0.190 47 0.700 0.330 48 0.680 0.550 49 0.807 0.742 50 0.607 0.500 51 0.807 0.516 52 0.800 0.467 53 0.710 0.355 54 0.733 0.633 55 0.677 0.226 56 0.710 0.387 57 0.733 0.400 58 0.807 0.258 59 0.933 0.833 60 0.903 0.677 61 0.936 0.936 62 0.931 0.759 63 0.774 0.839 64 0.733 0.667 65 0.710 0.355 66 0.700 0.400 67 0.807 0.516 68 0.710 0.290 69 0.833 0.600 70 0.936 0.936 71 1.000 0.867 72 0.710 0.774 73 0.770 0.645 74 0.890 0.679 75 0.935 0.968 77 0.580 0.516 79 0.710 0.484 80 0.930 0.790 81 0.830 0.533 82 0.740 0.613 83 0.833 0.677 85 0.680 0.320 86 0.680 0.710 87 0.645 0.660 88 0.800 0.677 89 0.484 0.477 90 0.770 0.513 91 0.774 0.480 92 0.806 0.506 94 0.645 0.677 95 0.770 0.667 96 0.550 0.451 97 0.774 0.806 98 0.892 0.928 99 0.838 0.871 100 0.800 0.567 101 0.677 0.274 102 0.533 0.287 103 0.630 0.274 104 0.450 0.319 105 0.767 0.367 106 0.774 0.632 107 0.667 0.577 108 0.742 0.429 109 0.481 0.468 110 0.931 0.821 111 0.677 0.623 112 0.567 0.377 113 0.452 0.226 114 0.700 0.253 115 0.677 0.387 116 0.677 0.471 117 0.867 0.767 118 0.903 0.494 119 0.767 0.520 120 0.613 0.758 121 0.645 0.758 122 0.893 0.761 123 0.968 0.800 124 0.700 0.350 125 0.774 0.300 126 0.733 0.227 127 0.806 0.468 128 0.710 0.494 129 0.733 0.567 130 0.871 0.526 131 0.800 0.696 132 0.871 0.865 133 0.613 0.710 134 0.857 0.893 135 0.935 0.645 136 0.900 0.343 137 0.710 0.429 138 0.767 0.333 139 0.677 0.429 140 0.742 0.542 141 0.933 0.467 142 1.000 0.616 143 0.933 0.893 144 0.612 0.629 145 0.806 0.493 146 0.964 0.618 147 0.806 0.693 148 0.967 0.750 149 0.774 0.411 150 0.933 0.333 151 0.839 0.476 152 0.677 0.686 153 0.800 0.525 154 0.801 0.712 155 0.733 0.825 156 0.903 0.685 157 1.000 0.976 158 0.862 0.991 159 0.936 0.871 160 0.700 0.717 161 0.774 0.557 162 0.600 0.275 163 0.710 0.548 164 0.774 0.710 165 0.767 0.667 166 1.000 0.823 167 0.900 0.900 168 0.710 0.911 169 0.935 0.914 170 0.714 0.885 171 0.742 0.823 172 0.700 0.942 173 0.774 0.508 174 0.600 0.467 175 0.710 0.465 176 0.613 0.516 177 0.533 0.617 178 0.839 0.468 179 0.867 0.867 180 0.871 0.700 181 0.935 0.903 182 0.893 0.643 183 0.935 0.593 184 0.782 0.390 185 0.710 0.419 186 0.708 0.330 187 0.677 0.568 188 0.839 0.603 189 0.867 0.813 190 0.742 0.865 191 0.733 0.893 192 0.903 0.945 193 0.467 0.932 194 0.793 0.889 195 0.862 0.932 196 0.720 0.867 197 0.790 0.707 198 0.670 0.581 199 0.708 0.609 200 0.889 0.645 202 0.600 0.731 203 0.933 0.893 204 0.677 0.958 205 0.419 0.839 206 0.793 0.897 207 0.774 0.931 208 0.800 0.724 209 0.452 0.613 210 0.666 0.467 211 0.774 0.774 212 0.548 0.516 213 0.800 0.767 214 0.742 0.871 215 0.933 0.800 216 0.645 0.935 217 0.613 0.903 218 0.500 0.963 219 0.419 0.806 220 0.767 0.533 221 0.710 0.400 222 0.633 0.833 223 0.548 0.581 224 0.667 0.581 225 0.774 0.300 226 0.710 0.434 227 0.767 0.767 228 0.774 0.806 229 0.740 0.774 230 0.571 0.778 231 0.645 0.484 232 0.700 0.200 233 0.452 0.290 234 0.500 0.167 235 0.742 0.710 236 0.677 0.387 237 0.567 0.300 238 0.710 0.387 239 0.667 0.400 240 0.839 0.548 241 0.677 0.645 242 0.929 0.536 243 0.710 0.741 244 0.733 0.767 245 0.419 0.516 246 0.667 0.533 247 0.667 0.258 248 0.710 0.581 249 0.800 0.500 250 0.871 0.804 251 0.700 0.667 252 0.806 0.968 253 0.667 0.968 254 0.655 0.897 255 0.710 0.839 256 0.800 0.800 257 0.645 0.613 258 0.867 0.533 259 0.581 0.548 260 0.484 0.645 261 0.833 0.767 262 0.774 0.581 263 0.767 0.567 264 0.774 0.710 265 0.516 0.839 266 0.429 0.643 267 0.710 0.871 268 0.667 0.667 269 0.516 0.226 270 0.567 0.267 271 0.806 0.484 272 0.806 0.500 273 0.667 0.839 274 0.806 0.816 275 0.567 0.867 276 0.742 0.903 277 0.484 0.806 278 0.786 0.714 279 0.871 0.968 280 0.700 0.867 281 0.710 0.548 282 0.800 0.567 283 0.645 0.322 284 0.645 0.484 285 0.600 0.667 286 0.613 0.613 287 0.700 0.900 288 0.774 0.806 289 0.581 0.580 290 0.786 0.890 291 0.774 0.640 292 0.567 0.620 293 0.580 0.370 294 0.330 0.370 295 0.550 0.550 296 0.730 0.710 297 0.867 0.533 298 0.903 0.516 299 0.833 0.933 300 0.839 0.839 301 0.548 0.871 302 0.828 0.724 303 0.871 0.774 304 0.900 0.667 305 0.710 0.516 306 0.500 0.267 307 0.870 0.613 308 0.968 0.645 309 0.800 0.600 310 0.774 0.742 311 0.933 0.867 312 0.742 0.935 313 0.871 0.935 314 0.821 0.821 315 0.903 0.935 316 0.900 0.935 317 0.742 0.387 318 0.567 0.400 319 0.484 0.516 320 0.710 0.484 321 0.500 0.667 322 0.677 0.452 323 0.833 0.633 324 0.742 0.742 325 0.742 0.710