Table 6 UBVRI Photometry of SN 1987A Averages per night Code for Note: E: Excellent G: Good F: Fair P: Poor DATE(UT) TIME JD V (B-V) (U-B) (V-R) (R-I) Note 2446800+ Feb 27.083 3.767 53.583 4.46 0.38 -0.16 0.37 0.07 Feb 28.135 4.819 54.635 4.45 0.52 0.40 0.42 0.05 F March 1.109 5.793 55.609 4.50 0.67 0.79 0.45 0.08 F March 2.139 6.823 56.639 4.46 0.81 1.06 0.45 0.07 F March 3.122 7.806 57.622 4.48 0.90 1.26 0.45 0.10 F March 4.110 8.794 58.610 4.45 0.99 1.40 0.47 0.10 G March 5.111 9.795 59.611 4.41 1.09 1.53 0.47 0.12 G March 6.109 10.793 60.609 4.38 1.18 1.62 0.48 0.12 G March 7.116 11.800 61.616 4.36 1.24 P March 8.090 12.774 62.590 4.34 1.31 P March 9.111 13.795 63.611 4.30 1.36 1.79 0.51 0.17 F March 10.138 14.822 64.638 4.27 1.39 1.82 0.52 0.17 F March 11.125 15.809 65.625 4.27 1.43 1.87 0.54 0.19 G March 12.149 16.833 66.649 4.24 1.47 1.90 0.54 0.21 P March 15.047 19.731 69.547 4.20 1.52 2.02 0.59 0.23 March 16.090 20.774 70.590 4.20 1.54 2.05 0.60 0.25 March 19.087 23.771 73.587 4.13 1.57 2.12 0.65 0.29 G March 20.063 24.747 74.563 4.11 1.58 2.14 0.66 0.30 E March 21.071 25.755 75.571 4.09 1.59 2.16 0.67 0.29 E March 22.075 26.759 76.575 4.08 1.60 2.16 0.69 0.29 F March 26.085 30.769 80.585 3.99 1.62 2.22 0.72 0.29 F March 27.078 31.762 81.578 3.97 1.61 2.25 0.72 0.28 E March 28.066 32.750 82.566 3.95 1.62 2.25 0.73 0.30 E March 29.085 33.769 83.585 3.91 1.63 2.32 0.72 0.28 F March 30.076 34.760 84.576 3.89 1.63 2.31 0.72 0.28 E March 31.102 35.786 85.602 3.87 1.64 2.31 0.73 0.29 E April 1.102 36.786 86.602 3.83 1.64 2.35 0.72 0.29 E April 2.081 37.765 87.581 3.79 1.64 2.39 0.72 0.29 E April 4.047 39.731 89.547 3.73 1.64 2.46 0.73 0.27 G April 6.029 41.713 91.529 3.67 1.66 2.49 0.72 0.27 E April 7.029 42.713 92.529 3.64 1.66 2.52 0.72 0.27 April 8.014 43.698 93.514 3.60 1.67 2.52 0.72 0.26 April 9.031 44.715 94.531 3.57 1.67 2.56 0.72 0.29 April 10.016 45.700 95.516 3.55 1.67 2.56 0.72 0.28 F April 11.047 46.731 96.547 3.53 1.66 2.60 0.72 0.29 April 12.009 47.693 97.509 3.49 1.66 2.62 0.71 0.28 April 16.017 51.701 101.517 3.38 1.66 2.65 0.71 0.28 F April 16.999 52.683 102.499 3.35 1.66 2.65 0.69 0.28 G April 18.052 53.736 103.552 3.33 1.65 2.65 0.71 0.27 E April 19.018 54.702 104.518 3.30 1.65 2.64 0.70 0.27 E April 20.051 55.735 105.551 3.27 1.67 P April 22.988 58.672 108.488 3.22 1.64 2.60 0.69 0.29 G April 24.036 59.720 109.536 3.19 1.65 2.58 0.70 0.26 F April 27.000 62.684 112.500 3.14 1.63 2.62 0.69 0.24 April 27.991 63.675 113.491 3.11 1.62 2.60 0.68 0.28 April 28.983 64.667 114.483 3.12 1.61 0.69 0.27 May 3.005 68.689 118.505 3.04 1.62 2.57 0.68 0.27 E May 3.982 69.666 119.482 3.04 1.62 2.56 0.67 0.27 E May 4.995 70.679 120.495 3.03 1.62 2.57 0.70 0.28 E May 7.996 73.680 123.496 3.01 1.61 2.56 0.68 0.28 E May 8.981 74.665 124.481 3.00 1.62 2.52 0.69 0.28 E May 9.993 75.677 125.493 3.00 1.60 2.53 0.70 0.28 E May 11.000 76.684 126.500 2.99 1.61 2.53 0.69 0.27 G May 13.987 79.671 129.487 2.98 1.60 2.52 0.68 0.31 E May 14.981 80.665 130.481 2.99 1.60 2.54 0.71 0.29 E May 16.026 81.710 131.526 2.98 1.61 2.53 0.70 0.27 E May 20.033 85.717 135.533 2.97 1.62 2.56 0.68 0.31 E May 20.968 86.652 136.468 2.98 1.59 2.54 0.72 0.27 E May 21.985 87.669 137.485 2.98 1.60 2.51 0.71 0.28 F May 23.994 89.678 139.494 2.99 1.61 2.53 0.73 0.30 P May 27.973 93.657 143.473 3.02 1.64 2.49 0.71 0.30 G May 29.969 95.653 145.469 3.06 1.64 2.52 0.73 0.30 F June 1.981 98.665 148.481 3.15 1.63 2.52 0.77 0.32 G June 4.956 101.640 151.456 3.24 1.67 2.49 0.78 0.33 June 5.950 102.634 152.450 3.29 1.69 2.52 0.80 0.34 F June 7.014 103.698 153.514 3.32 1.69 2.49 0.81 0.34 G June 7.989 104.673 154.489 3.39 1.72 2.52 0.83 0.34 E June 8.969 105.653 155.469 3.43 0.83 0.36 June 9.969 106.653 156.469 3.48 1.69 2.50 0.85 0.34 June 10.969 107.653 157.469 3.52 1.72 2.50 0.85 0.35 E June 11.962 108.646 158.462 3.58 1.72 2.50 0.86 0.36 E June 12.973 109.657 159.473 3.66 1.71 2.52 0.88 0.37 G June 13.989 110.673 160.489 3.71 1.73 2.52 0.89 0.38 E June 14.975 111.659 161.475 3.77 1.72 2.51 0.91 0.38 June 16.981 113.665 163.481 3.91 1.73 2.50 0.92 0.37 E June 17.963 114.647 164.463 3.97 1.72 2.52 0.94 0.37 E June 18.964 115.648 165.464 4.03 1.72 2.55 0.95 0.37 E June 19.978 116.662 166.478 4.08 1.73 2.53 0.95 0.38 F June 20.970 117.654 167.470 4.12 1.73 2.54 0.96 0.36 June 21.971 118.655 168.471 4.17 1.74 2.59 0.95 0.39 June 22.968 119.652 169.468 4.21 1.73 2.57 0.96 0.39 June 24.982 121.666 171.482 4.27 1.74 2.59 0.97 0.38 G June 25.970 122.654 172.470 4.29 1.73 2.57 0.98 0.38 E June 26.971 123.655 173.471 4.31 1.72 2.65 0.97 0.39 E June 28.978 125.662 175.478 4.35 1.74 2.57 0.98 0.37 E July 1.985 128.669 178.485 4.40 1.72 2.62 1.00 0.38 E July 2.964 129.648 179.464 4.41 1.71 2.58 1.00 0.38 E July 3.967 130.651 180.467 4.44 1.70 2.61 1.01 0.40 E July 4.969 131.653 181.469 4.43 1.72 2.55 1.01 0.38 E July 5.416 132.100 181.916 4.43 1.70 2.62 0.99 0.40 G July 30.402 157.086 206.902 4.71 1.64 2.42 1.04 0.36 E July 31.379 158.063 207.879 4.72 1.63 2.42 1.04 0.38 E Aug 1.393 159.077 208.893 4.74 1.62 2.41 1.05 0.37 G Aug 2.380 160.064 209.880 4.74 1.63 2.40 1.06 0.35 E Aug 6.404 164.088 213.904 4.79 1.61 2.37 1.07 0.36 E Aug 17.401 175.085 224.901 4.90 1.57 2.29 1.08 0.34 E Aug 19.384 177.068 226.884 4.91 1.57 2.28 1.09 0.36 E Aug 30.388 188.072 237.888 5.03 1.53 2.20 1.11 0.35 E Sep 3.376 192.060 241.876 5.07 1.53 2.16 1.11 0.35 E Sep 6.335 195.019 244.835 5.10 1.51 2.15 1.13 0.34 E Sep 9.344 198.028 247.844 5.13 1.50 2.11 1.12 0.34 E Sep 12.285 200.969 250.785 5.15 1.49 2.09 1.13 0.32 E Sep 16.279 204.963 254.779 5.20 1.49 2.06 1.14 0.34 G