IOTA/IOTA-ES occultation update for (1701) Okavango / TYC 1439-01886-1 event on 2024 Oct 20, 19:44 UT Visible from Summary ------- On 2024 Oct 20 UT, the 20.2986875832796 km diameter asteroid (1701) Okavango will occult a 10.3 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.14 mag to 17.43 mag (the magnitude of the asteroid) for at most 0.590 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: 98 * date and approx. time of event: 2024 Oct 20, 19:41 - 2024 Oct 20, 19:47 * geocentric midpoint of event [JD]: 2460604.32227992 * magnitude of target star: 10.29 * magnitude drop [mag]: 7.14 * estimated maximum duration [s]: 0.590 * Moon: 84 % sunlit, 86° distance * Sun: 47° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 114°) * approx speed of asteroid's shadow [km/s]: 34.6471 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1439-01886-1 by 1701 Okavango on 2024 Oct 20 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 103 0 0 30 4 31 19 41 7.8 0 67 -46 29 58 14 30 10 49 29 53 33 30 15 30 .... 104 0 0 30 26 18 19 41 7.8 1 68 -45 30 20 1 30 32 35 30 15 21 30 37 16 -0.29 105 0 0 30 47 45 19 41 7.9 2 68 -45 30 41 29 30 54 2 30 36 49 30 58 41 -0.29 106 0 0 31 8 51 19 41 8.0 3 69 -44 31 2 36 31 15 7 30 57 57 31 19 46 -0.29 107 0 0 31 29 37 19 41 8.2 4 69 -43 31 23 22 31 35 53 31 18 44 31 40 31 -0.28 108 0 0 31 50 3 19 41 8.5 5 70 -42 31 43 48 31 56 17 31 39 11 32 0 55 -0.28 109 0 0 32 10 7 19 41 8.8 6 70 -41 32 3 53 32 16 21 31 59 16 32 20 58 -0.28 110 0 0 32 29 50 19 41 9.1 7 71 -40 32 23 37 32 36 3 32 19 0 32 40 40 -0.28 111 0 0 32 49 12 19 41 9.5 8 71 -39 32 42 59 32 55 24 32 38 23 33 0 0 -0.28 112 0 0 33 8 12 19 41 9.9 9 72 -38 33 2 0 33 14 23 32 57 25 33 18 59 -0.28 113 0 0 33 26 51 19 41 10.4 9 73 -37 33 20 40 33 33 1 33 16 5 33 37 37 -0.28 114 0 0 33 45 7 19 41 10.9 10 73 -36 33 38 58 33 51 18 33 34 23 33 55 52 -0.28 115 0 0 34 3 3 19 41 11.5 11 74 -36 33 56 53 34 9 12 33 52 19 34 13 46 -0.28 116 0 0 34 20 36 19 41 12.1 12 74 -35 34 14 27 34 26 44 34 9 54 34 31 18 -0.28 117 0 0 34 37 47 19 41 12.7 13 75 -34 34 31 39 34 43 55 34 27 6 34 48 28 -0.28 118 0 0 34 54 36 19 41 13.4 14 75 -33 34 48 29 35 0 43 34 43 56 35 5 16 -0.28 119 0 0 35 11 2 19 41 14.1 15 76 -32 35 4 56 35 17 9 35 0 24 35 21 41 -0.28 120 0 0 35 27 7 19 41 14.9 16 77 -31 35 21 1 35 33 13 35 16 30 35 37 44 -0.28 121 0 0 35 42 49 19 41 15.7 16 77 -30 35 36 44 35 48 54 35 32 14 35 53 25 -0.28 122 0 0 35 58 9 19 41 16.5 17 78 -30 35 52 5 36 4 13 35 47 35 36 8 44 -0.28 123 0 0 36 13 6 19 41 17.4 18 78 -29 36 7 3 36 19 10 36 2 33 36 23 40 -0.28 124 0 0 36 27 42 19 41 18.3 19 79 -28 36 21 39 36 33 44 36 17 10 36 38 14 -0.28 125 0 0 36 41 54 19 41 19.2 20 80 -27 36 35 52 36 47 56 36 31 24 36 52 25 -0.28 126 0 0 36 55 44 19 41 20.2 21 80 -26 36 49 43 37 1 46 36 45 15 37 6 14 -0.28 127 0 0 37 9 12 19 41 21.2 21 81 -25 37 3 12 37 15 13 36 58 44 37 19 41 -0.28 128 0 0 37 22 18 19 41 22.2 22 82 -25 37 16 18 37 28 18 37 11 50 37 32 45 -0.28 129 0 0 37 35 1 19 41 23.3 23 82 -24 37 29 1 37 41 0 37 24 35 37 45 27 -0.28 130 0 0 37 47 21 19 41 24.4 24 83 -23 37 41 23 37 53 20 37 36 56 37 57 47 -0.28 131 0 0 37 59 20 19 41 25.5 25 84 -22 37 53 21 38 5 18 37 48 56 38 9 44 -0.28 132 0 0 38 10 55 19 41 26.7 26 84 -21 38 4 58 38 16 53 38 0 33 38 21 19 -0.28 133 0 0 38 22 9 19 41 27.8 26 85 -21 38 16 12 38 28 6 38 11 47 38 32 31 -0.28 134 0 0 38 33 0 19 41 29.1 27 86 -20 38 27 4 38 38 57 38 22 40 38 43 22 -0.28 135 0 0 38 43 29 19 41 30.3 28 86 -19 38 37 34 38 49 25 38 33 10 38 53 50 -0.28 136 0 0 38 53 36 19 41 31.6 29 87 -18 38 47 41 38 59 32 38 43 17 39 3 55 -0.28 137 0 0 39 3 21 19 41 32.9 30 88 -17 38 57 26 39 9 16 38 53 3 39 13 39 -0.28 138 0 0 39 12 43 19 41 34.2 30 88 -17 39 6 49 39 18 37 39 2 26 39 23 1 -0.28 139 0 0 39 21 43 19 41 35.6 31 89 -16 39 15 50 39 27 37 39 11 27 39 32 0 -0.28 140 0 0 39 30 22 19 41 37.0 32 90 -15 39 24 29 39 36 15 39 20 7 39 40 37 -0.28 141 0 0 39 38 38 19 41 38.4 33 91 -14 39 32 45 39 44 31 39 28 24 39 48 53 -0.28 142 0 0 39 46 32 19 41 39.8 33 91 -14 39 40 40 39 52 25 39 36 19 39 56 46 -0.28 143 0 0 39 54 5 19 41 41.3 34 92 -13 39 48 13 39 59 57 39 43 52 40 4 18 -0.28 144 0 0 40 1 15 19 41 42.7 35 93 -12 39 55 24 40 7 7 39 51 3 40 11 28 -0.28 145 0 0 40 8 4 19 41 44.3 36 94 -11 40 2 13 40 13 55 39 57 52 40 18 16 -0.28 146 0 0 40 14 30 19 41 45.8 37 94 -10 40 8 40 40 20 21 40 4 20 40 24 42 -0.28 147 0 0 40 20 35 19 41 47.3 37 95 -10 40 14 45 40 26 26 40 10 25 40 30 46 -0.28 148 0 0 40 26 18 19 41 48.9 38 96 -9 40 20 29 40 32 8 40 16 9 40 36 28 -0.28 149 0 0 40 31 40 19 41 50.5 39 97 -8 40 25 50 40 37 30 40 21 31 40 41 49 -0.28 150 0 0 40 36 40 19 41 52.1 40 97 -7 40 30 50 40 42 29 40 26 31 40 46 49 -0.28 151 0 0 40 41 18 19 41 53.8 40 98 -7 40 35 29 40 47 7 40 31 10 40 51 26 -0.28 152 0 0 40 45 34 19 41 55.5 41 99 -6 40 39 46 40 51 23 40 35 27 40 55 42 -0.28 153 0 0 40 49 29 19 41 57.2 42 100 -5 40 43 41 40 55 18 40 39 22 40 59 37 -0.28 154 0 0 40 53 3 19 41 58.9 42 101 -4 40 47 15 40 58 51 40 42 56 41 3 10 -0.28 155 0 0 40 56 15 19 42 0.6 43 102 -4 40 50 27 41 2 3 40 46 8 41 6 21 -0.28 156 0 0 40 59 5 19 42 2.4 44 102 -3 40 53 17 41 4 53 40 48 59 41 9 11 -0.28 157 0 0 41 1 34 19 42 4.1 45 103 -2 40 55 46 41 7 22 40 51 28 41 11 40 -0.28 158 0 0 41 3 41 19 42 5.9 45 104 -2 40 57 54 41 9 29 40 53 36 41 13 47 -0.28 159 0 0 41 5 27 19 42 7.8 46 105 -1 40 59 40 41 11 15 40 55 22 41 15 33 -0.28 160 0 0 41 6 51 19 42 9.6 47 106 0 41 1 4 41 12 39 40 56 46 41 16 57 -0.28 161 0 0 41 7 54 19 42 11.5 48 107 1 41 2 7 41 13 42 40 57 50 41 18 0 -0.28 162 0 0 41 8 36 19 42 13.4 48 108 1 41 2 49 41 14 23 40 58 31 41 18 41 -0.28 163 0 0 41 8 56 19 42 15.3 49 109 2 41 3 9 41 14 43 40 58 51 41 19 1 -0.28 164 0 0 41 8 55 19 42 17.2 50 110 3 41 3 7 41 14 42 40 58 50 41 19 0 -0.28 165 0 0 41 8 32 19 42 19.2 50 111 4 41 2 45 41 14 19 40 58 27 41 18 37 -0.28 166 0 0 41 7 48 19 42 21.1 51 112 4 41 2 0 41 13 35 40 57 43 41 17 53 -0.28 167 0 0 41 6 42 19 42 23.1 52 113 5 41 0 54 41 12 29 40 56 37 41 16 47 -0.28 168 0 0 41 5 15 19 42 25.1 53 114 6 40 59 27 41 11 2 40 55 9 41 15 20 -0.28 169 0 0 41 3 26 19 42 27.2 53 115 6 40 57 38 41 9 13 40 53 20 41 13 32 -0.28 170 0 0 41 1 15 19 42 29.2 54 116 7 40 55 28 41 7 3 40 51 10 41 11 22 -0.28 171 0 0 40 58 44 19 42 31.3 55 117 8 40 52 56 41 4 32 40 48 38 41 8 50 -0.28 172 0 0 40 55 50 19 42 33.4 55 118 9 40 50 2 41 1 38 40 45 44 41 5 57 -0.28 173 0 0 40 52 35 19 42 35.5 56 119 9 40 46 47 40 58 23 40 42 29 41 2 42 -0.28 174 0 0 40 48 58 19 42 37.6 57 120 10 40 43 10 40 54 47 40 38 51 40 59 6 -0.28 175 0 0 40 45 0 19 42 39.8 57 121 11 40 39 11 40 50 49 40 34 53 40 55 8 -0.28 176 0 0 40 40 40 19 42 42.0 58 123 12 40 34 51 40 46 29 40 30 32 40 50 48 -0.28 177 0 0 40 35 58 19 42 44.1 59 124 12 40 30 9 40 41 47 40 25 50 40 46 7 -0.28 178 0 0 40 30 54 19 42 46.4 60 125 13 40 25 5 40 36 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31 32 47 56 32 30 54 32 52 33 -0.28 -143 0 0 32 22 1 19 44 27.9 73 227 42 32 15 47 32 28 14 32 11 10 32 32 52 -0.28 -142 0 0 32 1 56 19 44 30.9 72 230 42 31 55 42 32 8 10 31 51 5 32 12 48 -0.28 -141 0 0 31 41 30 19 44 33.8 72 233 43 31 35 15 31 47 45 31 30 37 31 52 23 -0.28 -140 0 0 31 20 42 19 44 36.8 71 236 44 31 14 26 31 26 57 31 9 47 31 31 36 -0.28 -139 0 0 30 59 32 19 44 39.7 71 239 45 30 53 16 31 5 49 30 48 37 31 10 28 -0.28 -138 0 0 30 38 1 19 44 42.7 70 241 45 30 31 44 30 44 19 30 27 5 30 48 59 -0.28 -137 0 0 30 16 10 19 44 45.6 69 244 46 30 9 52 30 22 28 30 5 12 30 27 8 -0.28 -136 0 0 29 53 57 19 44 48.6 69 246 47 29 47 39 30 0 16 29 42 58 30 4 57 -0.28 -135 0 0 29 31 24 19 44 51.6 68 249 47 29 25 5 29 37 44 29 20 24 29 42 25 -0.28 -134 0 0 29 8 31 19 44 54.5 67 251 48 29 2 12 29 14 51 28 57 30 29 19 34 -0.28 -133 0 0 28 45 18 19 44 57.5 67 253 49 28 38 58 28 51 39 28 34 16 28 56 22 -0.28 -132 0 0 28 21 46 19 45 0.5 66 255 49 28 15 25 28 28 7 28 10 42 28 32 51 -0.28 -131 0 0 27 57 55 19 45 3.5 65 256 50 27 51 33 28 4 16 27 46 50 28 9 0 -0.28 -130 0 0 27 33 44 19 45 6.4 64 258 51 27 27 22 27 40 7 27 22 38 27 44 51 -0.28 -129 0 0 27 9 16 19 45 9.4 64 260 51 27 2 53 27 15 39 26 58 8 27 20 23 -0.28 -128 0 0 26 44 29 19 45 12.4 63 261 52 26 38 5 26 50 53 26 33 21 26 55 38 -0.28 -127 0 0 26 19 25 19 45 15.3 62 263 52 26 13 1 26 25 49 26 8 16 26 30 34 -0.28 -126 0 0 25 54 3 19 45 18.3 61 264 53 25 47 39 26 0 28 25 42 53 26 5 14 -0.28 -125 0 0 25 28 25 19 45 21.2 60 266 54 25 22 0 25 34 51 25 17 15 25 39 37 -0.29 -124 0 0 25 2 31 19 45 24.1 59 267 54 24 56 6 25 8 57 24 51 20 25 13 44 -0.29 -123 0 0 24 36 22 19 45 27.0 59 268 55 24 29 56 24 42 48 24 25 9 24 47 35 -0.29 -122 0 0 24 9 57 19 45 29.9 58 269 55 24 3 31 24 16 24 23 58 44 24 21 11 -0.29 -121 0 0 23 43 18 19 45 32.8 57 270 56 23 36 51 23 49 46 23 32 4 23 54 33 -0.29 -120 0 0 23 16 26 19 45 35.7 56 271 56 23 9 58 23 22 53 23 5 11 23 27 41 -0.29 -119 0 0 22 49 20 19 45 38.5 55 272 57 22 42 52 22 55 48 22 38 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282 59 16 35 33 16 48 33 16 30 44 16 53 23 -0.29 -105 0 0 16 13 4 19 46 15.2 41 282 59 16 6 35 16 19 35 16 1 46 16 24 24 -0.29 -104 0 0 15 44 4 19 46 17.5 40 283 59 15 37 34 15 50 34 15 32 45 15 55 23 -0.29 -103 0 0 15 15 2 19 46 19.8 39 283 59 15 8 32 15 21 32 15 3 43 15 26 21 -0.29 -102 0 0 14 45 59 19 46 22.1 38 284 59 14 39 30 14 52 29 14 34 41 14 57 18 -0.29 -101 0 0 14 16 57 19 46 24.3 37 284 58 14 10 27 14 23 26 14 5 39 14 28 15 -0.29 -100 0 0 13 47 55 19 46 26.4 35 285 58 13 41 26 13 54 25 13 36 38 13 59 14 -0.29 - 99 0 0 13 18 56 19 46 28.5 34 285 58 13 12 27 13 25 25 13 7 38 13 30 14 -0.29 - 98 0 0 12 49 59 19 46 30.5 33 285 58 12 43 30 12 56 27 12 38 42 13 1 16 -0.29 - 97 0 0 12 21 5 19 46 32.5 32 286 57 12 14 37 12 27 34 12 9 49 12 32 22 -0.29 - 96 0 0 11 52 16 19 46 34.4 31 286 57 11 45 48 11 58 44 11 41 0 12 3 32 -0.29 - 95 0 0 11 23 32 19 46 36.3 30 286 56 11 17 4 11 30 0 11 12 17 11 34 48 -0.29 - 94 0 0 10 54 54 19 46 38.1 29 287 56 10 48 26 11 1 21 10 43 39 11 6 9 -0.29 - 93 0 0 10 26 22 19 46 39.8 28 287 55 10 19 55 10 32 49 10 15 8 10 37 36 -0.29 - 92 0 0 9 57 58 19 46 41.5 27 287 55 9 51 31 10 4 24 9 46 45 10 9 12 -0.30 - 91 0 0 9 29 42 19 46 43.1 26 287 54 9 23 16 9 36 8 9 18 30 9 40 55 -0.30 - 90 0 0 9 1 35 19 46 44.7 25 288 54 8 55 10 9 8 1 8 50 24 9 12 47 -0.30 - 89 0 0 8 33 38 19 46 46.2 24 288 53 8 27 13 8 40 3 8 22 27 8 44 49 -0.30 - 88 0 0 8 5 51 19 46 47.6 22 288 53 7 59 27 8 12 16 7 54 42 8 17 2 -0.30 - 87 0 0 7 38 16 19 46 49.0 21 288 52 7 31 52 7 44 40 7 27 7 7 49 25 -0.30 - 86 0 0 7 10 52 19 46 50.3 20 288 51 7 4 29 7 17 16 6 59 44 7 22 1 -0.30 - 85 0 0 6 43 41 19 46 51.5 19 289 51 6 37 18 6 50 4 6 32 34 6 54 49 -0.30 - 84 0 0 6 16 43 19 46 52.7 18 289 50 6 10 21 6 23 6 6 5 38 6 27 50 -0.30 - 83 0 0 5 50 0 19 46 53.8 17 289 49 5 43 38 5 56 21 5 38 55 6 1 5 -0.30 - 82 0 0 5 23 31 19 46 54.8 16 289 48 5 17 10 5 29 52 5 12 27 5 34 35 -0.30 - 81 0 0 4 57 17 19 46 55.8 15 289 48 4 50 56 5 3 37 4 46 14 5 8 20 -0.30 - 80 0 0 4 31 18 19 46 56.7 14 289 47 4 24 59 4 37 38 4 20 17 4 42 20 -0.31 - 79 0 0 4 5 37 19 46 57.5 13 289 46 3 59 18 4 11 56 3 54 37 4 16 37 -0.31 - 78 0 0 3 40 12 19 46 58.3 12 289 45 3 33 54 3 46 30 3 29 13 3 51 12 -0.31 - 77 0 0 3 15 5 19 46 59.0 10 289 44 3 8 47 3 21 22 3 4 7 3 26 3 -0.31 - 76 0 0 2 50 15 19 46 59.6 9 290 44 2 43 59 2 56 33 2 39 19 3 1 13 -0.32 - 75 0 0 2 25 45 19 47 0.2 8 290 43 2 19 29 2 32 1 2 14 50 2 36 41 -0.32 - 74 0 0 2 1 34 19 47 0.6 7 290 42 1 55 18 2 7 49 1 50 40 2 12 28 -0.32 - 73 0 0 1 37 42 19 47 1.1 6 290 41 1 31 27 1 43 57 1 26 49 1 48 35 -0.33 - 72 0 0 1 14 10 19 47 1.4 5 290 40 1 7 56 1 20 24 1 3 18 1 25 2 -0.34 - 71 0 0 0 50 59 19 47 1.7 4 290 39 0 44 45 0 57 12 0 40 8 1 1 49 -0.35 - 70 0 0 0 28 8 19 47 1.9 3 290 38 0 21 56 0 34 21 0 17 19 0 38 58 -0.38 - 69 0 0 0 5 39 19 47 2.1 2 290 38 - 0 0 33 0 11 51 - 0 5 9 0 16 27 -0.43 - 68 0 0 - 0 16 28 19 47 2.2 1 290 37 - 0 22 39 - 0 10 17 - 0 27 15 - 0 5 41 -0.61 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 1439-01886-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 11 16 43.8808 DE: +19 51 11.054 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 11 16 43.8808 DE: +19 51 11.054 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.3 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1701) Okavango asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.006 distance from Earth [AU]: 4.36130 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.011", 0.002", 114.126° remarks: * orbital elements for (1701)Okavango : Mean anomaly = 194.9604351118 deg Arg. of pericenter = 259.3453723450 deg Long. of node = 61.1573982987 deg Inclination = 16.2840521854 deg Eccentricity = 0.1926739419 Semimajor axis = 3.1599432343 AU Perihelion dist = 2.5511045152 AU Mag: H = 10.67, G = 0.15 Epoch of elements : MJD 60603.82227995 TDT (2024 Oct 20.8223) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,0.59,2024,10,20,19.734718,0.075699,0.258340,18.778473,-5.458739,-0.003447,0.002620,-0.000001,0.000000 -156.2721,19.7188,-119.86,-10.73,False TYC 1439-01886-1,11.27885575,19.8530710,10.84,10.29,9.99,0.1,0,,11.30038016,19.7188338,7.15,6.99,0,0,0 1701,Okavango,17.43,20.615,4.3613,0,0,2.682,-11.01,,1.8,0 0,194.8162,2024,10,20,259.3454,61.1574,16.2841,0.19267,3.15994,2.55110,10.67,5.0,0.15 1.371,0.0110,0.0019,114,0.0024,Known errors,0.96,0,-1,-1 20241020_1886-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org