IOTA/IOTA-ES occultation update for (3641) Williams / UCAC4 233-120107 event on 2024 Jul 10, 22:42 UT Visible from Summary ------- On 2024 Jul 10 UT, the 31.6454930957284 km diameter asteroid (3641) Williams will occult a 12.0 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.96 mag to 15.91 mag (the magnitude of the asteroid) for at most 4.310 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2024 Jul 10, 22:27 - 2024 Jul 10, 22:56 * geocentric midpoint of event [JD]: 2460502.44586792 * magnitude of target star: 11.98 * magnitude drop [mag]: 3.96 * estimated maximum duration [s]: 4.310 * Moon: 22 % sunlit, 93° distance * Sun: 143° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 5.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.005", 108°) * approx speed of asteroid's shadow [km/s]: 7.5938 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 233-120107 by 3641 Williams on 2024 Jul 10 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude - 98 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 10 54 45 .. .. .. 10 49 5 .... - 97 0 0 10 8 45 22 56 2.7 1 135 26 10 21 14 9 56 16 10 26 55 9 50 34 .... - 96 0 0 9 9 52 22 56 2.0 3 135 25 9 22 22 8 57 21 9 28 4 8 51 39 0.04 - 95 0 0 8 10 36 22 56 0.8 4 135 24 8 23 8 7 58 5 8 28 51 7 52 22 0.01 - 94 0 0 7 11 2 22 55 59.2 5 135 22 7 23 35 6 58 30 7 29 18 6 52 47 0.00 - 93 0 0 6 11 12 22 55 57.0 7 135 21 6 23 45 5 58 39 6 29 29 5 52 55 -0.01 - 92 0 0 5 11 9 22 55 54.3 8 135 20 5 23 43 4 58 35 5 29 27 4 52 52 -0.01 - 91 0 0 4 10 56 22 55 51.1 10 135 19 4 23 31 3 58 22 4 29 15 3 52 39 -0.02 - 90 0 0 3 10 38 22 55 47.4 11 135 17 3 23 12 2 58 4 3 28 56 2 52 20 -0.02 - 89 0 0 2 10 16 22 55 43.3 12 136 16 2 22 50 1 57 42 2 28 34 1 51 58 -0.02 - 88 0 0 1 9 55 22 55 38.6 14 136 15 1 22 28 0 57 21 1 28 12 0 51 37 -0.03 - 87 0 0 0 9 37 22 55 33.5 15 136 13 0 22 10 - 0 2 56 0 27 53 - 0 8 40 -0.03 - 86 0 0 - 0 50 35 22 55 27.8 17 136 12 - 0 38 3 - 1 3 7 - 0 32 20 - 1 8 50 -0.03 - 85 0 0 - 1 50 37 22 55 21.8 18 136 11 - 1 38 5 - 2 3 8 - 1 32 23 - 2 8 50 -0.03 - 84 0 0 - 2 50 25 22 55 15.2 19 135 10 - 2 37 55 - 3 2 55 - 2 32 13 - 3 8 37 -0.03 - 83 0 0 - 3 49 59 22 55 8.2 21 135 8 - 3 37 30 - 4 2 27 - 3 31 49 - 4 8 8 -0.03 - 82 0 0 - 4 49 13 22 55 0.8 22 135 7 - 4 36 46 - 5 1 40 - 4 31 6 - 5 7 20 -0.03 - 81 0 0 - 5 48 6 22 54 53.0 24 135 6 - 5 35 41 - 6 0 31 - 5 30 1 - 6 6 11 -0.03 - 80 0 0 - 6 46 36 22 54 44.8 25 135 5 - 6 34 12 - 6 58 59 - 6 28 33 - 7 4 37 -0.03 - 79 0 0 - 7 44 38 22 54 36.2 26 135 3 - 7 32 17 - 7 56 59 - 7 26 39 - 8 2 37 -0.03 - 78 0 0 - 8 42 12 22 54 27.3 28 135 2 - 8 29 53 - 8 54 30 - 8 24 16 - 9 0 7 -0.03 - 77 0 0 - 9 39 14 22 54 18.0 29 135 1 - 9 26 58 - 9 51 30 - 9 21 22 - 9 57 6 -0.03 - 76 0 0 -10 35 43 22 54 8.3 30 135 0 -10 23 29 -10 47 56 -10 17 55 -10 53 31 -0.03 - 75 0 0 -11 31 36 22 53 58.3 32 134 -2 -11 19 25 -11 43 47 -11 13 52 -11 49 20 -0.03 - 74 0 0 -12 26 52 22 53 48.1 33 134 -3 -12 14 44 -12 39 0 -12 9 12 -12 44 32 -0.03 - 73 0 0 -13 21 28 22 53 37.5 34 134 -4 -13 9 23 -13 33 33 -13 3 52 -13 39 4 -0.03 - 72 0 0 -14 15 24 22 53 26.7 35 134 -5 -14 3 22 -14 27 26 -13 57 52 -14 32 55 -0.03 - 71 0 0 -15 8 37 22 53 15.7 37 134 -6 -14 56 38 -15 20 36 -14 51 10 -15 26 3 -0.03 - 70 0 0 -16 1 6 22 53 4.4 38 133 -8 -15 49 10 -16 13 2 -15 43 44 -16 18 28 -0.03 - 69 0 0 -16 52 50 22 52 52.9 39 133 -9 -16 40 58 -17 4 43 -16 35 33 -17 10 7 -0.03 - 68 0 0 -17 43 48 22 52 41.2 41 133 -10 -17 31 59 -17 55 37 -17 26 36 -18 1 0 -0.02 - 67 0 0 -18 33 59 22 52 29.4 42 132 -11 -18 22 13 -18 45 44 -18 16 51 -18 51 6 -0.02 - 66 0 0 -19 23 21 22 52 17.3 43 132 -12 -19 11 39 -19 35 3 -19 6 19 -19 40 23 -0.02 - 65 0 0 -20 11 55 22 52 5.2 44 132 -13 -20 0 16 -20 23 33 -19 54 58 -20 28 51 -0.02 - 64 0 0 -20 59 38 22 51 52.9 45 131 -14 -20 48 3 -21 11 13 -20 42 47 -21 16 30 -0.02 - 63 0 0 -21 46 32 22 51 40.5 47 131 -15 -21 35 1 -21 58 3 -21 29 46 -22 3 18 -0.02 - 62 0 0 -22 32 35 22 51 27.9 48 131 -17 -22 21 7 -22 44 2 -22 15 54 -22 49 16 -0.02 - 61 0 0 -23 17 46 22 51 15.3 49 130 -18 -23 6 23 -23 29 10 -23 1 11 -23 34 22 -0.02 - 60 0 0 -24 2 7 22 51 2.6 50 130 -19 -23 50 47 -24 13 27 -23 45 37 -24 18 37 -0.02 - 59 0 0 -24 45 36 22 50 49.9 51 130 -20 -24 34 19 -24 56 52 -24 29 11 -25 2 0 -0.02 - 58 0 0 -25 28 12 22 50 37.1 52 129 -21 -25 17 0 -25 39 25 -25 11 53 -25 44 32 -0.02 - 57 0 0 -26 9 58 22 50 24.3 53 129 -22 -25 58 49 -26 21 7 -25 53 44 -26 26 11 -0.02 - 56 0 0 -26 50 51 22 50 11.4 54 128 -23 -26 39 46 -27 1 56 -26 34 43 -27 6 59 -0.02 - 55 0 0 -27 30 53 22 49 58.5 55 128 -24 -27 19 51 -27 41 54 -27 14 50 -27 46 56 -0.02 - 54 0 0 -28 10 3 22 49 45.6 56 128 -25 -27 59 5 -28 21 0 -27 54 5 -28 26 0 -0.02 - 53 0 0 -28 48 21 22 49 32.7 58 127 -26 -28 37 27 -28 59 15 -28 32 29 -29 4 13 -0.01 - 52 0 0 -29 25 49 22 49 19.8 59 127 -26 -29 14 58 -29 36 39 -29 10 2 -29 41 35 -0.01 - 51 0 0 -30 2 25 22 49 6.9 60 126 -27 -29 51 39 -30 13 12 -29 46 44 -30 18 7 -0.01 - 50 0 0 -30 38 11 22 48 54.1 61 126 -28 -30 27 28 -30 48 54 -30 22 35 -30 53 47 -0.01 - 49 0 0 -31 13 7 22 48 41.2 62 125 -29 -31 2 28 -31 23 46 -30 57 36 -31 28 38 -0.01 - 48 0 0 -31 47 13 22 48 28.4 63 125 -30 -31 36 37 -31 57 49 -31 31 48 -32 2 39 -0.01 - 47 0 0 -32 20 30 22 48 15.7 64 124 -31 -32 9 58 -32 31 2 -32 5 9 -32 35 50 -0.01 - 46 0 0 -32 52 58 22 48 3.0 64 124 -32 -32 42 29 -33 3 26 -32 37 42 -33 8 13 -0.01 - 45 0 0 -33 24 37 22 47 50.3 65 123 -33 -33 14 12 -33 35 2 -33 9 27 -33 39 47 -0.01 - 44 0 0 -33 55 28 22 47 37.7 66 123 -34 -33 45 7 -34 5 50 -33 40 23 -34 10 34 -0.01 - 43 0 0 -34 25 33 22 47 25.1 67 122 -34 -34 15 14 -34 35 51 -34 10 32 -34 40 33 -0.01 - 42 0 0 -34 54 50 22 47 12.6 68 122 -35 -34 44 35 -35 5 5 -34 39 54 -35 9 45 -0.01 - 41 0 0 -35 23 21 22 47 0.2 69 121 -36 -35 13 9 -35 33 32 -35 8 30 -35 38 11 -0.01 - 40 0 0 -35 51 6 22 46 47.8 70 120 -37 -35 40 57 -36 1 14 -35 36 20 -36 5 52 -0.01 - 39 0 0 -36 18 6 22 46 35.5 71 120 -38 -36 8 0 -36 28 11 -36 3 24 -36 32 47 -0.01 - 38 0 0 -36 44 21 22 46 23.3 72 119 -38 -36 34 19 -36 54 23 -36 29 44 -36 58 58 -0.01 - 37 0 0 -37 9 52 22 46 11.1 73 119 -39 -36 59 53 -37 19 51 -36 55 20 -37 24 24 -0.01 - 36 0 0 -37 34 40 22 45 59.0 73 118 -40 -37 24 44 -37 44 36 -37 20 12 -37 49 8 0.00 - 35 0 0 -37 58 45 22 45 47.0 74 118 -41 -37 48 51 -38 8 38 -37 44 21 -38 13 8 0.00 - 34 0 0 -38 22 7 22 45 35.1 75 117 -41 -38 12 17 -38 31 57 -38 7 48 -38 36 26 0.00 - 33 0 0 -38 44 48 22 45 23.2 76 116 -42 -38 35 0 -38 54 35 -38 30 32 -38 59 3 0.00 - 32 0 0 -39 6 47 22 45 11.5 77 116 -43 -38 57 2 -39 16 32 -38 52 36 -39 20 59 0.00 - 31 0 0 -39 28 6 22 44 59.7 77 115 -43 -39 18 24 -39 37 48 -39 13 59 -39 42 13 0.00 - 30 0 0 -39 48 45 22 44 48.1 78 114 -44 -39 39 5 -39 58 24 -39 34 41 -40 2 48 0.00 - 29 0 0 -40 8 44 22 44 36.6 79 114 -45 -39 59 7 -40 18 21 -39 54 44 -40 22 44 0.00 - 28 0 0 -40 28 4 22 44 25.1 80 113 -45 -40 18 30 -40 37 38 -40 14 8 -40 42 0 0.00 - 27 0 0 -40 46 46 22 44 13.7 81 113 -46 -40 37 14 -40 56 18 -40 32 53 -41 0 38 0.00 - 26 0 0 -41 4 50 22 44 2.4 81 112 -47 -40 55 20 -41 14 19 -40 51 1 -41 18 39 0.00 - 25 0 0 -41 22 16 22 43 51.1 82 111 -47 -41 12 49 -41 31 43 -41 8 30 -41 36 2 0.00 - 24 0 0 -41 39 5 22 43 40.0 83 111 -48 -41 29 40 -41 48 30 -41 25 23 -41 52 48 0.00 - 23 0 0 -41 55 18 22 43 28.9 83 110 -49 -41 45 55 -42 4 41 -41 41 39 -42 8 57 0.00 - 22 0 0 -42 10 55 22 43 17.8 84 109 -49 -42 1 34 -42 20 15 -41 57 18 -42 24 31 0.00 - 21 0 0 -42 25 56 22 43 6.9 85 108 -50 -42 16 37 -42 35 15 -42 12 23 -42 39 29 0.00 - 20 0 0 -42 40 22 22 42 56.0 85 108 -50 -42 31 5 -42 49 39 -42 26 52 -42 53 52 0.00 - 19 0 0 -42 54 13 22 42 45.2 86 107 -51 -42 44 59 -43 3 28 -42 40 46 -43 7 41 0.00 - 18 0 0 -43 7 31 22 42 34.5 86 106 -52 -42 58 18 -43 16 43 -42 54 6 -43 20 56 0.00 - 17 0 0 -43 20 14 22 42 23.8 86 105 -52 -43 11 3 -43 29 25 -43 6 51 -43 33 36 0.00 - 16 0 0 -43 32 23 22 42 13.2 87 102 -53 -43 23 14 -43 41 33 -43 19 3 -43 45 43 0.00 - 15 0 0 -43 44 0 22 42 2.6 87 349 -53 -43 34 52 -43 53 8 -43 30 42 -43 57 18 0.05 - 14 0 0 -43 55 4 22 41 52.1 87 288 -54 -43 45 58 -44 4 10 -43 41 49 -44 8 19 0.00 - 13 0 0 -44 5 35 22 41 41.7 86 286 -54 -43 56 30 -44 14 40 -43 52 22 -44 18 48 0.00 - 12 0 0 -44 15 35 22 41 31.4 86 285 -55 -44 6 31 -44 24 38 -44 2 23 -44 28 46 0.00 - 11 0 0 -44 25 2 22 41 21.1 86 284 -55 -44 16 0 -44 34 4 -44 11 53 -44 38 11 0.00 - 10 0 0 -44 33 58 22 41 10.8 85 283 -56 -44 24 57 -44 42 59 -44 20 51 -44 47 5 0.00 - 9 0 0 -44 42 23 22 41 0.6 85 282 -56 -44 33 23 -44 51 22 -44 29 17 -44 55 28 0.00 - 8 0 0 -44 50 17 22 40 50.5 84 281 -57 -44 41 18 -44 59 15 -44 37 13 -45 3 20 0.00 - 7 0 0 -44 57 40 22 40 40.4 83 280 -57 -44 48 42 -45 6 37 -44 44 37 -45 10 42 0.00 - 6 0 0 -45 4 32 22 40 30.4 83 280 -58 -44 55 36 -45 13 29 -44 51 31 -45 17 33 0.00 - 5 0 0 -45 10 54 22 40 20.4 82 279 -58 -45 1 59 -45 19 50 -44 57 55 -45 23 54 0.00 - 4 0 0 -45 16 47 22 40 10.5 82 278 -59 -45 7 52 -45 25 41 -45 3 48 -45 29 45 0.00 - 3 0 0 -45 22 9 22 40 0.6 81 278 -59 -45 13 15 -45 31 3 -45 9 12 -45 35 6 0.00 - 2 0 0 -45 27 2 22 39 50.8 80 277 -60 -45 18 8 -45 35 55 -45 14 5 -45 39 58 0.00 - 1 0 0 -45 31 25 22 39 41.0 80 276 -60 -45 22 32 -45 40 17 -45 18 29 -45 44 20 0.00 0 0 0 -45 35 18 22 39 31.2 79 275 -61 -45 26 26 -45 44 10 -45 22 24 -45 48 13 0.00 1 0 0 -45 38 42 22 39 21.5 78 275 -61 -45 29 51 -45 47 34 -45 25 49 -45 51 36 0.00 2 0 0 -45 41 37 22 39 11.8 78 274 -61 -45 32 46 -45 50 28 -45 28 44 -45 54 30 0.00 3 0 0 -45 44 3 22 39 2.2 77 273 -62 -45 35 13 -45 52 54 -45 31 11 -45 56 56 0.00 4 0 0 -45 46 0 22 38 52.6 76 273 -62 -45 37 10 -45 54 50 -45 33 8 -45 58 52 0.00 5 0 0 -45 47 28 22 38 43.0 76 272 -63 -45 38 38 -45 56 18 -45 34 36 -46 0 20 0.00 6 0 0 -45 48 27 22 38 33.5 75 271 -63 -45 39 37 -45 57 17 -45 35 35 -46 1 18 0.00 7 0 0 -45 48 56 22 38 24.0 75 271 -63 -45 40 7 -45 57 46 -45 36 5 -46 1 48 0.00 8 0 0 -45 48 57 22 38 14.5 74 270 -64 -45 40 7 -45 57 47 -45 36 6 -46 1 49 0.00 9 0 0 -45 48 29 22 38 5.1 73 269 -64 -45 39 39 -45 57 19 -45 35 38 -46 1 21 0.00 10 0 0 -45 47 32 22 37 55.6 73 268 -64 -45 38 42 -45 56 23 -45 34 40 -46 0 24 0.00 11 0 0 -45 46 6 22 37 46.2 72 268 -65 -45 37 16 -45 54 57 -45 33 14 -45 58 58 0.00 12 0 0 -45 44 11 22 37 36.9 71 267 -65 -45 35 20 -45 53 2 -45 31 19 -45 57 4 0.00 13 0 0 -45 41 47 22 37 27.5 71 266 -65 -45 32 56 -45 50 38 -45 28 54 -45 54 40 0.00 14 0 0 -45 38 53 22 37 18.2 70 266 -65 -45 30 2 -45 47 45 -45 26 0 -45 51 47 0.00 15 0 0 -45 35 30 22 37 8.9 69 265 -66 -45 26 38 -45 44 22 -45 22 36 -45 48 25 0.00 16 0 0 -45 31 38 22 36 59.6 69 264 -66 -45 22 45 -45 40 30 -45 18 43 -45 44 33 0.00 17 0 0 -45 27 16 22 36 50.4 68 264 -66 -45 18 23 -45 36 9 -45 14 20 -45 40 12 0.00 18 0 0 -45 22 24 22 36 41.1 67 263 -66 -45 13 30 -45 31 18 -45 9 27 -45 35 21 0.00 19 0 0 -45 17 2 22 36 31.9 67 262 -67 -45 8 8 -45 25 57 -45 4 4 -45 30 1 0.00 20 0 0 -45 11 10 22 36 22.7 66 262 -67 -45 2 15 -45 20 6 -44 58 11 -45 24 10 0.00 21 0 0 -45 4 48 22 36 13.5 65 261 -67 -44 55 52 -45 13 44 -44 51 47 -45 17 49 0.00 22 0 0 -44 57 55 22 36 4.4 64 260 -67 -44 48 58 -45 6 53 -44 44 53 -45 10 58 0.00 23 0 0 -44 50 31 22 35 55.2 64 260 -67 -44 41 33 -44 59 30 -44 37 27 -45 3 35 0.00 24 0 0 -44 42 36 22 35 46.0 63 259 -67 -44 33 37 -44 51 36 -44 29 31 -44 55 42 0.00 25 0 0 -44 34 10 22 35 36.9 62 258 -67 -44 25 9 -44 43 11 -44 21 3 -44 47 18 0.00 26 0 0 -44 25 12 22 35 27.8 62 258 -67 -44 16 10 -44 34 15 -44 12 3 -44 38 22 0.00 27 0 0 -44 15 42 22 35 18.7 61 257 -67 -44 6 39 -44 24 46 -44 2 31 -44 28 54 0.00 28 0 0 -44 5 40 22 35 9.6 60 256 -67 -43 56 35 -44 14 45 -43 52 27 -44 18 54 0.00 29 0 0 -43 55 5 22 35 0.5 60 256 -67 -43 45 59 -44 4 12 -43 41 50 -44 8 21 0.00 30 0 0 -43 43 58 22 34 51.4 59 255 -67 -43 34 49 -43 53 6 -43 30 40 -43 57 15 0.00 31 0 0 -43 32 16 22 34 42.3 58 254 -67 -43 23 6 -43 41 26 -43 18 56 -43 45 37 0.00 32 0 0 -43 20 1 22 34 33.3 57 254 -67 -43 10 50 -43 29 13 -43 6 38 -43 33 24 0.00 33 0 0 -43 7 12 22 34 24.2 57 253 -67 -42 57 58 -43 16 25 -42 53 46 -43 20 37 0.00 34 0 0 -42 53 48 22 34 15.2 56 252 -67 -42 44 33 -43 3 3 -42 40 20 -43 7 16 -0.01 35 0 0 -42 39 49 22 34 6.2 55 252 -67 -42 30 32 -42 49 6 -42 26 18 -42 53 20 -0.01 36 0 0 -42 25 14 22 33 57.2 54 251 -67 -42 15 55 -42 34 33 -42 11 40 -42 38 48 -0.01 37 0 0 -42 10 3 22 33 48.1 54 250 -67 -42 0 42 -42 19 25 -41 56 26 -42 23 40 -0.01 38 0 0 -41 54 16 22 33 39.2 53 250 -66 -41 44 53 -42 3 40 -41 40 36 -42 7 56 -0.01 39 0 0 -41 37 52 22 33 30.2 52 249 -66 -41 28 26 -41 47 17 -41 24 8 -41 51 35 -0.01 40 0 0 -41 20 50 22 33 21.2 51 248 -66 -41 11 22 -41 30 18 -41 7 3 -41 34 37 -0.01 41 0 0 -41 3 10 22 33 12.3 51 248 -66 -40 53 39 -41 12 40 -40 49 19 -41 17 0 -0.01 42 0 0 -40 44 51 22 33 3.4 50 247 -65 -40 35 18 -40 54 24 -40 30 56 -40 58 45 -0.01 43 0 0 -40 25 52 22 32 54.5 49 246 -65 -40 16 17 -40 35 28 -40 11 54 -40 39 50 -0.01 44 0 0 -40 6 14 22 32 45.6 48 246 -65 -39 56 36 -40 15 53 -39 52 13 -40 20 16 -0.01 45 0 0 -39 45 56 22 32 36.7 47 245 -64 -39 36 15 -39 55 37 -39 31 50 -40 0 1 -0.01 46 0 0 -39 24 56 22 32 27.9 47 245 -64 -39 15 12 -39 34 40 -39 10 46 -39 39 6 -0.01 47 0 0 -39 3 14 22 32 19.1 46 244 -64 -38 53 28 -39 13 1 -38 49 0 -39 17 28 -0.01 48 0 0 -38 40 50 22 32 10.3 45 243 -63 -38 31 1 -38 50 40 -38 26 32 -38 55 9 -0.01 49 0 0 -38 17 43 22 32 1.6 44 243 -63 -38 7 51 -38 27 36 -38 3 21 -38 32 6 -0.01 50 0 0 -37 53 52 22 31 52.9 43 242 -62 -37 43 57 -38 3 48 -37 39 25 -38 8 20 -0.01 51 0 0 -37 29 17 22 31 44.2 42 242 -62 -37 19 18 -37 39 16 -37 14 45 -37 43 49 -0.01 52 0 0 -37 3 57 22 31 35.6 42 241 -61 -36 53 55 -37 13 59 -36 49 20 -37 18 33 -0.01 53 0 0 -36 37 50 22 31 27.1 41 240 -61 -36 27 45 -36 47 56 -36 23 9 -36 52 32 -0.01 54 0 0 -36 10 58 22 31 18.6 40 240 -60 -36 0 49 -36 21 6 -35 56 11 -36 25 44 -0.01 55 0 0 -35 43 18 22 31 10.1 39 239 -59 -35 33 6 -35 53 30 -35 28 26 -35 58 9 -0.02 56 0 0 -35 14 50 22 31 1.7 38 239 -59 -35 4 34 -35 25 5 -34 59 53 -35 29 46 -0.02 57 0 0 -34 45 33 22 30 53.4 37 238 -58 -34 35 14 -34 55 52 -34 30 32 -35 0 35 -0.02 58 0 0 -34 15 27 22 30 45.2 36 238 -58 -34 5 5 -34 25 50 -34 0 21 -34 30 34 -0.02 59 0 0 -33 44 31 22 30 37.1 35 237 -57 -33 34 5 -33 54 58 -33 29 19 -33 59 44 -0.02 60 0 0 -33 12 45 22 30 29.0 34 237 -56 -33 2 15 -33 23 15 -32 57 27 -33 28 2 -0.02 61 0 0 -32 40 7 22 30 21.0 33 236 -55 -32 29 33 -32 50 41 -32 24 44 -32 55 30 -0.02 62 0 0 -32 6 37 22 30 13.2 32 236 -55 -31 55 59 -32 17 15 -31 51 8 -32 22 6 -0.02 63 0 0 -31 32 15 22 30 5.4 31 235 -54 -31 21 33 -31 42 56 -31 16 40 -31 47 49 -0.02 64 0 0 -30 56 59 22 29 57.8 30 235 -53 -30 46 13 -31 7 45 -30 41 18 -31 12 39 -0.02 65 0 0 -30 20 49 22 29 50.3 29 234 -52 -30 9 59 -30 31 39 -30 5 3 -30 36 35 -0.02 66 0 0 -29 43 45 22 29 43.0 28 234 -52 -29 32 51 -29 54 39 -29 27 53 -29 59 37 -0.02 67 0 0 -29 5 46 22 29 35.8 27 233 -51 -28 54 48 -29 16 44 -28 49 48 -29 21 44 -0.02 68 0 0 -28 26 52 22 29 28.8 26 233 -50 -28 15 50 -28 37 54 -28 10 48 -28 42 56 -0.02 69 0 0 -27 47 2 22 29 22.0 25 232 -49 -27 35 55 -27 58 8 -27 30 51 -28 3 12 -0.02 70 0 0 -27 6 15 22 29 15.3 24 232 -48 -26 55 5 -27 17 26 -26 49 59 -27 22 31 -0.02 71 0 0 -26 24 32 22 29 8.8 23 231 -47 -26 13 17 -26 35 47 -26 8 10 -26 40 55 -0.02 72 0 0 -25 41 53 22 29 2.6 22 231 -46 -25 30 34 -25 53 12 -25 25 24 -25 58 21 -0.02 73 0 0 -24 58 16 22 28 56.6 20 230 -45 -24 46 53 -25 9 39 -24 41 41 -25 14 51 -0.02 74 0 0 -24 13 42 22 28 50.8 19 230 -44 -24 2 15 -24 25 10 -23 57 1 -24 30 23 -0.02 75 0 0 -23 28 11 22 28 45.3 18 230 -43 -23 16 39 -23 39 43 -23 11 24 -23 44 58 -0.02 76 0 0 -22 41 43 22 28 40.0 17 229 -42 -22 30 7 -22 53 19 -22 24 50 -22 58 37 -0.02 77 0 0 -21 54 19 22 28 35.0 16 229 -41 -21 42 38 -22 5 59 -21 37 19 -22 11 18 -0.02 78 0 0 -21 5 57 22 28 30.4 15 229 -40 -20 54 13 -21 17 42 -20 48 51 -21 23 3 -0.02 79 0 0 -20 16 40 22 28 26.0 13 228 -39 -20 4 51 -20 28 28 -19 59 28 -20 33 51 -0.02 80 0 0 -19 26 26 22 28 22.0 12 228 -38 -19 14 33 -19 38 19 -19 9 8 -19 43 44 -0.02 81 0 0 -18 35 18 22 28 18.3 11 228 -37 -18 23 21 -18 47 15 -18 17 54 -18 52 42 -0.02 82 0 0 -17 43 15 22 28 15.0 10 227 -36 -17 31 14 -17 55 16 -17 25 45 -18 0 45 -0.02 83 0 0 -16 50 19 22 28 12.0 8 227 -35 -16 38 14 -17 2 24 -16 32 43 -17 7 54 -0.02 84 0 0 -15 56 30 22 28 9.5 7 227 -34 -15 44 21 -16 8 39 -15 38 49 -16 14 11 -0.02 85 0 0 -15 1 51 22 28 7.4 6 226 -32 -14 49 38 -15 14 3 -14 44 4 -15 19 37 -0.01 86 0 0 -14 6 21 22 28 5.7 4 226 -31 -13 54 5 -14 18 38 -13 48 29 -14 24 14 0.00 87 0 0 -13 10 4 22 28 4.4 3 226 -30 -12 57 44 -13 22 24 -12 52 6 -13 28 1 0.01 88 0 0 -12 13 0 22 28 3.6 2 226 -29 -12 0 36 -12 25 24 -11 54 57 -12 31 3 0.06 89 0 0 -11 15 12 22 28 3.3 0 226 -28 -11 2 45 -11 27 39 .. .. .. -11 33 19 0.72 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 233-120107 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 57 35.1668 DE: -43 26 56.193 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 57 35.1668 DE: -43 26 56.193 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.400) * V mag [mag]: 12.0 * B mag [mag]: 14.4 * Diameter [mas]: 0.80 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3641) Williams asteroid class: approx. diameter [km]: 32 approx. diameter ["]: 0.023 distance from Earth [AU]: 1.85880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Apr 24 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.028", 0.005", 108.102° remarks: * orbital elements for (3641)Williams : Mean anomaly = 316.9752193248 deg Arg. of pericenter = 293.6665178659 deg Long. of node = 30.7171106033 deg Inclination = 16.1019521463 deg Eccentricity = 0.1264635016 Semimajor axis = 2.9941780303 AU Perihelion dist = 2.6155237923 AU Mag: H = 11.62, G = 0.15 Epoch of elements : MJD 60501.94586833 TDT (2024 Jul 10.9459) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,4.31,2024,7,10,22.700830,-0.000253,-0.000794,-4.135169,1.127645,0.003037,0.001346,0.000001,0.000000 -15.0149,-43.4889,-159.12,22.07,False UCAC4 233-120107,16.95976856,-43.4489424,14.43,11.98,10.66,0.8,0,,16.98937057,-43.4889478,3.96,4.82,0,0,0 3641,Williams,15.91,32.724,1.8588,0,0,-1.797,5.34,,1.8,0 0,316.7953,2024,7,10,293.6665,30.7171,16.1020,0.12646,2.99418,2.61552,11.62,5.0,0.15 1.228,0.0283,0.0053,108,0.0055,Known errors,0.96,0,-1,-1 20240710_120107,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org