IOTA/IOTA-ES occultation update for (429) Lotis / UCAC4 484-047418 event on 2024 Oct 27, 17:07 UT Visible from Summary ------- On 2024 Oct 27 UT, the 72.343770431955 km diameter asteroid (429) Lotis will occult a 10.3 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.86 mag to 15.17 mag (the magnitude of the asteroid) for at most 3.080 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: 100 * date and approx. time of event: 2024 Oct 27, 17:03 - 2024 Oct 27, 17:11 * geocentric midpoint of event [JD]: 2460611.21354729 * magnitude of target star: 10.32 * magnitude drop [mag]: 4.86 * estimated maximum duration [s]: 3.080 * Moon: 20 % sunlit, 26° distance * Sun: 76° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 78 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 104°) * approx speed of asteroid's shadow [km/s]: 23.5370 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 484-047418 by 429 Lotis on 2024 Oct 27 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 116 0 0 6 26 21 17 3 18.6 1 83 -73 6 5 3 6 47 35 6 0 45 6 51 52 .... 117 0 0 6 32 34 17 3 18.7 2 84 -72 6 11 18 6 53 47 6 7 0 6 58 4 0.27 118 0 0 6 38 15 17 3 18.9 3 84 -71 6 17 0 6 59 27 6 12 42 7 3 44 0.32 119 0 0 6 43 24 17 3 19.2 4 84 -70 6 22 9 7 4 35 6 17 52 7 8 51 0.34 120 0 0 6 48 0 17 3 19.6 5 84 -69 6 26 47 7 9 11 6 22 29 7 13 27 0.35 121 0 0 6 52 4 17 3 20.1 6 84 -69 6 30 51 7 13 14 6 26 34 7 17 30 0.36 122 0 0 6 55 36 17 3 20.7 7 84 -68 6 34 23 7 16 45 6 30 6 7 21 1 0.36 123 0 0 6 58 35 17 3 21.3 8 84 -67 6 37 23 7 19 44 6 33 6 7 23 59 0.37 124 0 0 7 1 2 17 3 22.0 9 84 -66 6 39 50 7 22 10 6 35 33 7 26 26 0.37 125 0 0 7 2 56 17 3 22.9 10 84 -65 6 41 44 7 24 4 6 37 28 7 28 19 0.37 126 0 0 7 4 17 17 3 23.8 11 85 -64 6 43 6 7 25 25 6 38 49 7 29 40 0.38 127 0 0 7 5 6 17 3 24.8 12 85 -63 6 43 55 7 26 14 6 39 38 7 30 29 0.38 128 0 0 7 5 22 17 3 25.9 13 85 -62 6 44 11 7 26 30 6 39 54 7 30 45 0.38 129 0 0 7 5 6 17 3 27.0 14 85 -61 6 43 55 7 26 14 6 39 38 7 30 29 0.38 130 0 0 7 4 17 17 3 28.3 15 85 -60 6 43 5 7 25 25 6 38 48 7 29 40 0.38 131 0 0 7 2 55 17 3 29.7 16 85 -59 6 41 43 7 24 3 6 37 26 7 28 19 0.39 132 0 0 7 1 0 17 3 31.1 17 85 -58 6 39 48 7 22 9 6 35 31 7 26 25 0.39 133 0 0 6 58 32 17 3 32.6 18 85 -57 6 37 20 7 19 42 6 33 2 7 23 58 0.39 134 0 0 6 55 32 17 3 34.2 19 85 -56 6 34 19 7 16 42 6 30 1 7 20 58 0.39 135 0 0 6 51 59 17 3 35.9 20 85 -55 6 30 45 7 13 10 6 26 27 7 17 26 0.39 136 0 0 6 47 53 17 3 37.7 21 85 -54 6 26 38 7 9 5 6 22 20 7 13 21 0.39 137 0 0 6 43 13 17 3 39.5 22 86 -53 6 21 57 7 4 26 6 17 40 7 8 43 0.39 138 0 0 6 38 1 17 3 41.4 23 86 -52 6 16 44 6 59 15 6 12 26 7 3 32 0.39 139 0 0 6 32 16 17 3 43.5 24 86 -51 6 10 58 6 53 31 6 6 40 6 57 48 0.39 140 0 0 6 25 58 17 3 45.6 25 86 -50 6 4 39 6 47 15 6 0 20 6 51 32 0.39 141 0 0 6 19 7 17 3 47.8 26 86 -49 5 57 46 6 40 25 5 53 27 6 44 42 0.39 142 0 0 6 11 43 17 3 50.0 27 86 -48 5 50 20 6 33 2 5 46 1 6 37 20 0.39 143 0 0 6 3 45 17 3 52.4 28 86 -47 5 42 21 6 25 6 5 38 2 6 29 24 0.39 144 0 0 5 55 15 17 3 54.8 29 86 -46 5 33 49 6 16 37 5 29 29 6 20 56 0.39 145 0 0 5 46 11 17 3 57.4 30 86 -45 5 24 43 6 7 35 5 20 23 6 11 54 0.39 146 0 0 5 36 34 17 4 0.0 31 86 -44 5 15 4 5 58 0 5 10 44 6 2 19 0.39 147 0 0 5 26 24 17 4 2.7 32 86 -43 5 4 52 5 47 52 5 0 31 5 52 12 0.40 148 0 0 5 15 41 17 4 5.4 33 86 -42 4 54 7 5 37 11 4 49 46 5 41 31 0.40 149 0 0 5 4 24 17 4 8.3 34 85 -41 4 42 48 5 25 57 4 38 26 5 30 17 0.40 150 0 0 4 52 35 17 4 11.2 35 85 -40 4 30 56 5 14 10 4 26 34 5 18 30 0.40 151 0 0 4 40 12 17 4 14.2 36 85 -39 4 18 31 5 1 49 4 14 8 5 6 10 0.40 152 0 0 4 27 16 17 4 17.3 37 85 -38 4 5 33 4 48 56 4 1 9 4 53 18 0.40 153 0 0 4 13 47 17 4 20.5 38 85 -37 3 52 1 4 35 29 3 47 37 4 39 52 0.40 154 0 0 3 59 45 17 4 23.8 39 85 -36 3 37 56 4 21 30 3 33 32 4 25 53 0.40 155 0 0 3 45 10 17 4 27.1 40 85 -35 3 23 18 4 6 57 3 18 53 4 11 21 0.40 156 0 0 3 30 1 17 4 30.5 41 84 -34 3 8 7 3 51 52 3 3 42 3 56 16 0.40 157 0 0 3 14 20 17 4 34.0 42 84 -33 2 52 23 3 36 14 2 47 57 3 40 38 0.40 158 0 0 2 58 6 17 4 37.6 43 84 -32 2 36 6 3 20 3 2 31 39 3 24 28 0.40 159 0 0 2 41 19 17 4 41.3 44 83 -31 2 19 16 3 3 19 2 14 49 3 7 45 0.40 160 0 0 2 24 0 17 4 45.0 45 83 -30 2 1 54 2 46 3 1 57 26 2 50 29 0.40 161 0 0 2 6 8 17 4 48.8 45 83 -28 1 43 58 2 28 14 1 39 30 2 32 41 0.40 162 0 0 1 47 43 17 4 52.7 46 82 -27 1 25 31 2 9 53 1 21 1 2 14 21 0.40 163 0 0 1 28 47 17 4 56.6 47 82 -26 1 6 30 1 50 59 1 2 0 1 55 28 0.40 164 0 0 1 9 18 17 5 0.6 48 81 -25 0 46 58 1 31 34 0 42 27 1 36 3 0.40 165 0 0 0 49 17 17 5 4.7 49 81 -24 0 26 53 1 11 36 0 22 22 1 16 6 0.40 166 0 0 0 28 44 17 5 8.9 50 80 -23 0 6 17 0 51 7 0 1 45 0 55 38 0.40 167 0 0 0 7 40 17 5 13.1 51 80 -22 - 0 14 51 0 30 6 - 0 19 24 0 34 38 0.40 168 0 0 - 0 13 56 17 5 17.4 52 79 -21 - 0 36 30 0 8 34 - 0 41 4 0 13 6 0.40 169 0 0 - 0 36 3 17 5 21.8 53 78 -20 - 0 58 41 - 0 13 29 - 1 3 15 - 0 8 56 0.40 170 0 0 - 0 58 41 17 5 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5 44 41 - 6 36 20 - 5 39 58 0.40 -177 0 0 - 6 36 49 17 6 29.2 64 59 -5 - 7 0 22 - 6 13 20 - 7 5 7 - 6 8 36 0.40 -176 0 0 - 7 5 55 17 6 34.3 65 57 -4 - 7 29 33 - 6 42 22 - 7 34 19 - 6 37 38 0.40 -175 0 0 - 7 35 26 17 6 39.5 66 55 -2 - 7 59 7 - 7 11 49 - 8 3 54 - 7 7 4 0.40 -174 0 0 - 8 5 19 17 6 44.8 66 53 -1 - 8 29 4 - 7 41 39 - 8 33 52 - 7 36 53 0.40 -173 0 0 - 8 35 35 17 6 50.0 67 50 0 - 8 59 23 - 8 11 50 - 9 4 12 - 8 7 4 0.40 -172 0 0 - 9 6 12 17 6 55.3 67 48 1 - 9 30 4 - 8 42 24 - 9 34 54 - 8 37 36 0.40 -171 0 0 - 9 37 9 17 7 0.6 67 45 2 -10 1 5 - 9 13 18 -10 5 56 - 9 8 29 0.40 -170 0 0 -10 8 26 17 7 5.9 68 42 3 -10 32 26 - 9 44 31 -10 37 17 - 9 39 42 0.40 -169 0 0 -10 40 2 17 7 11.3 68 39 4 -11 4 6 -10 16 4 -11 8 57 -10 11 14 0.40 -168 0 0 -11 11 57 17 7 16.6 68 36 5 -11 36 3 -10 47 54 -11 40 56 -10 43 4 0.40 -167 0 0 -11 44 8 17 7 22.0 68 33 6 -12 8 18 -11 20 2 -12 13 11 -11 15 11 0.40 -166 0 0 -12 16 35 17 7 27.4 68 30 7 -12 40 48 -11 52 26 -12 45 42 -11 47 34 0.40 -165 0 0 -12 49 17 17 7 32.7 68 27 9 -13 13 34 -12 25 5 -13 18 28 -12 20 13 0.40 -164 0 0 -13 22 14 17 7 38.1 68 24 10 -13 46 33 -12 57 59 -13 51 28 -12 53 6 0.40 -163 0 0 -13 55 23 17 7 43.5 68 21 11 -14 19 45 -13 31 5 -14 24 41 -13 26 12 0.40 -162 0 0 -14 28 44 17 7 48.8 68 18 12 -14 53 10 -14 4 24 -14 58 6 -13 59 30 0.40 -161 0 0 -15 2 17 17 7 54.2 68 15 13 -15 26 45 -14 37 54 -15 31 41 -14 32 59 0.40 -160 0 0 -15 35 59 17 7 59.5 67 12 14 -16 0 30 -15 11 33 -16 5 27 -15 6 38 0.40 -159 0 0 -16 9 50 17 8 4.8 67 9 15 -16 34 23 -15 45 22 -16 39 21 -15 40 26 0.40 -158 0 0 -16 43 49 17 8 10.1 67 7 16 -17 8 24 -16 19 19 -17 13 22 -16 14 22 0.40 -157 0 0 -17 17 54 17 8 15.4 66 4 17 -17 42 31 -16 53 22 -17 47 30 -16 48 25 0.40 -156 0 0 -17 52 5 17 8 20.6 66 1 18 -18 16 44 -17 27 30 -18 21 43 -17 22 33 0.40 -155 0 0 -18 26 20 17 8 25.8 65 359 19 -18 51 1 -18 1 43 -18 56 0 -17 56 46 0.40 -154 0 0 -19 0 37 17 8 31.0 64 357 20 -19 25 20 -18 36 0 -19 30 20 -18 31 2 0.39 -153 0 0 -19 34 57 17 8 36.1 64 354 21 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57 47 -26 52 20 -25 52 48 0.39 -140 0 0 -26 55 33 17 9 37.8 53 333 34 -27 20 21 -26 30 50 -27 25 21 -26 25 52 0.39 -139 0 0 -27 28 22 17 9 42.1 52 332 35 -27 53 9 -27 3 41 -27 58 10 -26 58 42 0.39 -138 0 0 -28 0 58 17 9 46.3 51 331 36 -28 25 43 -27 36 17 -28 30 43 -27 31 19 0.39 -137 0 0 -28 33 18 17 9 50.4 51 330 36 -28 58 2 -28 8 38 -29 3 2 -28 3 40 0.39 -136 0 0 -29 5 22 17 9 54.5 50 329 37 -29 30 5 -28 40 44 -29 35 4 -28 35 46 0.39 -135 0 0 -29 37 9 17 9 58.5 49 328 38 -30 1 50 -29 12 33 -30 6 50 -29 7 36 0.39 -134 0 0 -30 8 39 17 10 2.3 48 327 39 -30 33 19 -29 44 5 -30 38 18 -29 39 8 0.39 -133 0 0 -30 39 51 17 10 6.1 47 326 40 -31 4 28 -30 15 18 -31 9 27 -30 10 22 0.39 -132 0 0 -31 10 43 17 10 9.9 46 325 40 -31 35 19 -30 46 13 -31 40 17 -30 41 17 0.39 -131 0 0 -31 41 16 17 10 13.5 45 324 41 -32 5 49 -31 16 48 -32 10 47 -31 11 52 0.39 -130 0 0 -32 11 29 17 10 17.1 44 323 42 -32 35 59 -31 47 3 -32 40 56 -31 42 7 0.39 -129 0 0 -32 41 20 17 10 20.6 43 322 43 -33 5 48 -32 16 57 -33 10 45 -32 12 2 0.39 -128 0 0 -33 10 50 17 10 23.9 42 321 43 -33 35 15 -32 46 29 -33 40 11 -32 41 35 0.39 -127 0 0 -33 39 57 17 10 27.2 41 320 44 -34 4 20 -33 15 39 -34 9 16 -33 10 46 0.39 -126 0 0 -34 8 42 17 10 30.5 40 319 45 -34 33 2 -33 44 27 -34 37 57 -33 39 34 0.39 -125 0 0 -34 37 4 17 10 33.6 40 318 45 -35 1 21 -34 12 52 -35 6 16 -34 8 0 0.39 -124 0 0 -35 5 3 17 10 36.7 39 318 46 -35 29 16 -34 40 54 -35 34 10 -34 36 2 0.39 -123 0 0 -35 32 37 17 10 39.6 38 317 47 -35 56 48 -35 8 31 -36 1 41 -35 3 40 0.39 -122 0 0 -35 59 47 17 10 42.5 37 316 47 -36 23 54 -35 35 44 -36 28 47 -35 30 54 0.39 -121 0 0 -36 26 33 17 10 45.3 36 315 48 -36 50 36 -36 2 33 -36 55 28 -35 57 43 0.39 -120 0 0 -36 52 53 17 10 48.1 35 314 48 -37 16 53 -36 28 57 -37 21 45 -36 24 8 0.39 -119 0 0 -37 18 48 17 10 50.7 34 314 49 -37 42 45 -36 54 56 -37 47 35 -36 50 7 0.39 -118 0 0 -37 44 18 17 10 53.3 33 313 49 -38 8 11 -37 20 29 -38 13 1 -37 15 41 0.39 -117 0 0 -38 9 21 17 10 55.7 32 312 50 -38 33 11 -37 45 36 -38 38 0 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8 20 0.39 -104 0 0 -42 55 18 17 11 21.2 22 302 55 -43 18 17 -42 32 22 -43 22 56 -42 27 45 0.39 -103 0 0 -43 14 12 17 11 22.7 21 302 55 -43 37 8 -42 51 21 -43 41 45 -42 46 44 0.39 -102 0 0 -43 32 40 17 11 24.1 20 301 55 -43 55 32 -43 9 53 -44 0 9 -43 5 17 0.39 -101 0 0 -43 50 43 17 11 25.5 19 300 55 -44 13 30 -43 27 59 -44 18 7 -43 23 24 0.39 -100 0 0 -44 8 19 17 11 26.7 19 299 55 -44 31 2 -43 45 39 -44 35 38 -43 41 5 0.39 - 99 0 0 -44 25 29 17 11 28.0 18 299 55 -44 48 9 -44 2 53 -44 52 44 -43 58 19 0.39 - 98 0 0 -44 42 13 17 11 29.1 17 298 56 -45 4 50 -44 19 41 -45 9 24 -44 15 8 0.39 - 97 0 0 -44 58 32 17 11 30.2 16 297 56 -45 21 5 -44 36 3 -45 25 38 -44 31 31 0.39 - 96 0 0 -45 14 25 17 11 31.3 15 296 56 -45 36 54 -44 52 0 -45 41 27 -44 47 29 0.39 - 95 0 0 -45 29 53 17 11 32.3 15 296 56 -45 52 18 -45 7 31 -45 56 50 -45 3 1 0.39 - 94 0 0 -45 44 56 17 11 33.2 14 295 56 -46 7 17 -45 22 38 -46 11 48 -45 18 8 0.39 - 93 0 0 -45 59 33 17 11 34.1 13 294 56 -46 21 51 -45 37 19 -46 26 22 -45 32 50 0.39 - 92 0 0 -46 13 46 17 11 34.9 13 294 56 -46 36 0 -45 51 35 -46 40 30 -45 47 6 0.40 - 91 0 0 -46 27 34 17 11 35.7 12 293 56 -46 49 45 -46 5 26 -46 54 14 -46 0 58 0.40 - 90 0 0 -46 40 57 17 11 36.4 11 292 56 -47 3 5 -46 18 52 -47 7 33 -46 14 25 0.40 - 89 0 0 -46 53 56 17 11 37.1 10 291 56 -47 16 0 -46 31 54 -47 20 28 -46 27 28 0.40 - 88 0 0 -47 6 30 17 11 37.7 10 291 56 -47 28 32 -46 44 32 -47 32 59 -46 40 7 0.40 - 87 0 0 -47 18 41 17 11 38.3 9 290 56 -47 40 39 -46 56 46 -47 45 5 -46 52 21 0.40 - 86 0 0 -47 30 27 17 11 38.9 8 289 55 -47 52 22 -47 8 35 -47 56 48 -47 4 11 0.40 - 85 0 0 -47 41 50 17 11 39.3 7 288 55 -48 3 42 -47 20 1 -48 8 7 -47 15 37 0.40 - 84 0 0 -47 52 49 17 11 39.8 7 288 55 -48 14 39 -47 31 3 -48 19 3 -47 26 40 0.40 - 83 0 0 -48 3 25 17 11 40.2 6 287 55 -48 25 11 -47 41 41 -48 29 35 -47 37 19 0.40 - 82 0 0 -48 13 37 17 11 40.5 5 286 55 -48 35 21 -47 51 57 -48 39 45 -47 47 34 0.40 - 81 0 0 -48 23 26 17 11 40.8 5 285 55 -48 45 8 -48 1 48 -48 49 31 -47 57 27 0.41 - 80 0 0 -48 32 53 17 11 41.1 4 285 55 -48 54 32 -48 11 17 -48 58 54 -48 6 56 0.41 - 79 0 0 -48 41 56 17 11 41.3 3 284 54 -49 3 33 -48 20 23 -49 7 55 -48 16 3 0.41 - 78 0 0 -48 50 37 17 11 41.5 3 283 54 -49 12 11 -48 29 7 -49 16 33 -48 24 47 0.42 - 77 0 0 -48 58 56 17 11 41.6 2 282 54 -49 20 27 -48 37 27 -49 24 48 -48 33 8 0.43 - 76 0 0 -49 6 52 17 11 41.7 1 282 54 -49 28 21 -48 45 25 -49 32 42 -48 41 6 0.44 - 75 0 0 -49 14 25 17 11 41.8 1 281 53 -49 35 53 -48 53 1 -49 40 13 -48 48 42 0.50 - 74 0 0 -49 21 37 17 11 41.8 0 280 53 .. .. .. -49 0 15 .. .. .. -48 55 56 5.00 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 484-047418 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 11 26.9507 DE: +06 41 40.193 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 11 26.9508 DE: +06 41 40.192 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.3 * B mag [mag]: 10.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (429) Lotis asteroid class: approx. diameter [km]: 72 approx. diameter ["]: 0.038 distance from Earth [AU]: 2.59530 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#116 date of fit: 2023 Feb 09 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", 0.003", 103.83° remarks: * orbital elements for (429)Lotis : Mean anomaly = 73.1234664214 deg Arg. of pericenter = 168.7143370062 deg Long. of node = 219.9097144804 deg Inclination = 9.5437843829 deg Eccentricity = 0.1244273521 Semimajor axis = 2.6066497358 AU Perihelion dist = 2.2823112114 AU Mag: H = 10.01, G = 0.15 Epoch of elements : MJD 60610.71354683 TDT (2024 Oct 27.7135) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1162023Feb09,3.08,2024,10,27,17.125135,-0.172568,-0.325490,11.734821,-6.227677,-0.005397,0.001466,0.000000,0.000000 -155.2369,6.5949,-80.92,-13.11,False UCAC4 484-047418,9.19081962,6.6944981,10.90,10.32,10.01,0.1,0,,9.21264398,6.5949412,4.87,4.73,0,0,0 429,Lotis,15.17,72.532,2.5953,0,0,2.668,-21.10,,3.6,0 0,72.9564,2024,10,27,168.7143,219.9097,9.5438,0.12443,2.60665,2.28231,10.00,5.0,0.15 1.101,0.0107,0.0030,104,0.0039,Known errors,1.02,0,-1,-1 20241027_047418,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org