Composite Dust Phase Function for Comets by D. Schleicher (2010 May) Tabulated Values (ASCII) phase angle phase function phase function (deg) 0 deg normalize 90 deg normalize 0.0 1.0000 1.8604 1.0 0.9596 1.7853 2.0 0.9217 1.7146 3.0 0.8859 1.6481 4.0 0.8522 1.5855 5.0 0.8205 1.5264 6.0 0.7906 1.4708 7.0 0.7624 1.4184 8.0 0.7358 1.3689 9.0 0.7107 1.3222 10.0 0.6871 1.2782 11.0 0.6647 1.2367 12.0 0.6436 1.1974 13.0 0.6237 1.1604 14.0 0.6049 1.1254 15.0 0.5872 1.0924 16.0 0.5704 1.0612 17.0 0.5546 1.0317 18.0 0.5396 1.0039 19.0 0.5255 0.9776 20.0 0.5122 0.9528 21.0 0.4996 0.9294 22.0 0.4877 0.9073 23.0 0.4765 0.8864 24.0 0.4659 0.8667 25.0 0.4559 0.8482 26.0 0.4465 0.8307 27.0 0.4377 0.8142 28.0 0.4293 0.7988 29.0 0.4215 0.7842 30.0 0.4142 0.7706 31.0 0.4073 0.7578 32.0 0.4009 0.7458 33.0 0.3949 0.7346 34.0 0.3893 0.7242 35.0 0.3840 0.7145 36.0 0.3792 0.7055 37.0 0.3747 0.6972 38.0 0.3706 0.6895 39.0 0.3668 0.6825 40.0 0.3634 0.6761 41.0 0.3603 0.6703 42.0 0.3575 0.6651 43.0 0.3540 0.6586 44.0 0.3509 0.6528 45.0 0.3482 0.6477 46.0 0.3458 0.6433 47.0 0.3438 0.6395 48.0 0.3421 0.6364 49.0 0.3407 0.6339 50.0 0.3397 0.6319 51.0 0.3389 0.6305 52.0 0.3385 0.6297 53.0 0.3383 0.6295 54.0 0.3385 0.6297 55.0 0.3389 0.6305 56.0 0.3396 0.6318 57.0 0.3405 0.6335 58.0 0.3418 0.6358 59.0 0.3432 0.6386 60.0 0.3450 0.6418 61.0 0.3470 0.6455 62.0 0.3493 0.6498 63.0 0.3518 0.6545 64.0 0.3546 0.6596 65.0 0.3576 0.6653 66.0 0.3609 0.6714 67.0 0.3645 0.6781 68.0 0.3683 0.6852 69.0 0.3724 0.6929 70.0 0.3768 0.7010 71.0 0.3815 0.7097 72.0 0.3865 0.7190 73.0 0.3917 0.7288 74.0 0.3973 0.7391 75.0 0.4032 0.7500 76.0 0.4094 0.7616 77.0 0.4159 0.7737 78.0 0.4228 0.7865 79.0 0.4300 0.8000 80.0 0.4376 0.8141 81.0 0.4456 0.8290 82.0 0.4540 0.8445 83.0 0.4627 0.8609 84.0 0.4720 0.8781 85.0 0.4816 0.8961 86.0 0.4918 0.9149 87.0 0.5024 0.9347 88.0 0.5136 0.9555 89.0 0.5253 0.9772 90.0 0.5375 1.0000 91.0 0.5504 1.0239 92.0 0.5638 1.0490 93.0 0.5780 1.0753 94.0 0.5928 1.1029 95.0 0.6084 1.1318 96.0 0.6247 1.1622 97.0 0.6419 1.1941 98.0 0.6599 1.2276 99.0 0.6788 1.2628 100.0 0.6987 1.2998 101.0 0.7196 1.3388 102.0 0.7416 1.3797 103.0 0.7648 1.4228 104.0 0.7892 1.4682 105.0 0.8149 1.5161 106.0 0.8420 1.5665 107.0 0.8706 1.6197 108.0 0.9008 1.6759 109.0 0.9327 1.7353 110.0 0.9664 1.7980 111.0 1.0021 1.8643 112.0 1.0399 1.9346 113.0 1.0799 2.0090 114.0 1.1223 2.0879 115.0 1.1673 2.1717 116.0 1.2151 2.2606 117.0 1.2659 2.3551 118.0 1.3200 2.4557 119.0 1.3776 2.5628 120.0 1.4389 2.6770 121.0 1.5045 2.7989 122.0 1.5744 2.9291 123.0 1.6493 3.0683 124.0 1.7294 3.2174 125.0 1.8153 3.3772 126.0 1.9075 3.5488 127.0 2.0066 3.7331 128.0 2.1132 3.9315 129.0 2.2281 4.1452 130.0 2.3521 4.3759 131.0 2.4861 4.6252 132.0 2.6312 4.8951 133.0 2.7884 5.1876 134.0 2.9592 5.5053 135.0 3.1450 5.8509 136.0 3.3474 6.2276 137.0 3.5685 6.6389 138.0 3.8104 7.0888 139.0 4.0755 7.5821 140.0 4.3669 8.1241 141.0 4.6877 8.7209 142.0 5.0418 9.3797 143.0 5.4336 10.1086 144.0 5.8682 10.9172 145.0 6.3518 11.8168 146.0 6.8912 12.8204 147.0 7.4948 13.9433 148.0 8.1724 15.2039 149.0 8.9355 16.6237 150.0 9.7981 18.2284 151.0 10.7767 20.0490 152.0 11.8914 22.1227 153.0 13.1662 24.4945 154.0 14.6309 27.2193 155.0 16.3215 30.3644 156.0 18.2826 34.0130 157.0 20.5698 38.2681 158.0 23.2524 43.2588 159.0 26.4178 49.1477 160.0 30.1769 56.1411 161.0 34.6719 64.5036 162.0 40.0862 74.5764 163.0 46.6588 86.8040 164.0 54.7036 101.7706 165.0 64.6368 120.2504 166.0 77.0148 143.2783 167.0 92.5871 172.2490 168.0 112.3702 209.0535 169.0 137.7479 256.2662 170.0 170.6031 317.3900 171.0 213.4773 397.1532 172.0 269.7281 501.8021 173.0 343.5886 639.2122 174.0 439.8869 818.3657 175.0 562.9161 1047.2490 176.0 713.6276 1327.6328 177.0 884.4779 1645.4827 178.0 1053.2719 1959.5071 179.0 1182.2266 2199.4144 180.0 1231.1735 2290.4753