IOTA/IOTA-ES occultation update for (3652) Soros / UCAC4 340-102316 event on 2024 Oct 22, 15:41 UT Visible from Summary ------- On 2024 Oct 22 UT, the 13.269 km diameter asteroid (3652) Soros will occult a 11.0 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.86 mag to 17.85 mag (the magnitude of the asteroid) for at most 0.350 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 Oct 22, 15:39 - 2024 Oct 22, 15:43 * geocentric midpoint of event [JD]: 2460606.15393620 * magnitude of target star: 10.99 * magnitude drop [mag]: 6.86 * estimated maximum duration [s]: 0.350 * Moon: 67 % sunlit, 164° distance * Sun: 55° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 38.1371 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 340-102316 by 3652 Soros on 2024 Oct 22 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 - 73 0 0 38 41 2 15 39 33.1 0 119 38 38 35 40 38 46 25 38 33 3 38 49 3 .... - 72 0 0 38 15 17 15 39 33.1 1 119 39 38 9 55 38 20 39 38 7 18 38 23 16 -0.30 - 71 0 0 37 49 31 15 39 33.2 2 120 40 37 44 9 37 54 53 37 41 33 37 57 30 -0.55 - 70 0 0 37 23 46 15 39 33.3 3 121 40 37 18 25 37 29 8 37 15 49 37 31 45 -0.64 - 69 0 0 36 58 3 15 39 33.5 4 121 41 36 52 42 37 3 24 36 50 6 37 6 1 -0.69 - 68 0 0 36 32 22 15 39 33.8 5 122 41 36 27 2 36 37 43 36 24 26 36 40 19 -0.72 - 67 0 0 36 6 45 15 39 34.1 6 122 42 36 1 25 36 12 5 35 58 50 36 14 41 -0.74 - 66 0 0 35 41 11 15 39 34.4 7 123 43 35 35 52 35 46 31 35 33 17 35 49 7 -0.76 - 65 0 0 35 15 43 15 39 34.9 7 124 43 35 10 24 35 21 2 35 7 49 35 23 37 -0.77 - 64 0 0 34 50 20 15 39 35.4 8 124 44 34 45 2 34 55 38 34 42 27 34 58 13 -0.78 - 63 0 0 34 25 3 15 39 35.9 9 125 44 34 19 46 34 30 21 34 17 11 34 32 56 -0.79 - 62 0 0 33 59 53 15 39 36.5 10 125 45 33 54 37 34 5 10 33 52 2 34 7 45 -0.79 - 61 0 0 33 34 52 15 39 37.1 11 126 45 33 29 36 33 40 8 33 27 2 33 42 42 -0.80 - 60 0 0 33 9 58 15 39 37.9 12 127 46 33 4 43 33 15 14 33 2 10 33 17 48 -0.80 - 59 0 0 32 45 15 15 39 38.6 13 127 46 32 40 0 32 50 30 32 37 27 32 53 4 -0.81 - 58 0 0 32 20 41 15 39 39.5 14 128 46 32 15 27 32 25 56 32 12 54 32 28 29 -0.81 - 57 0 0 31 56 19 15 39 40.4 15 128 47 31 51 5 32 1 32 31 48 33 32 4 5 -0.81 - 56 0 0 31 32 7 15 39 41.3 16 129 47 31 26 55 31 37 20 31 24 22 31 39 53 -0.81 - 55 0 0 31 8 8 15 39 42.3 17 129 47 31 2 57 31 13 21 31 0 25 31 15 53 -0.82 - 54 0 0 30 44 23 15 39 43.4 18 130 48 30 39 11 30 49 34 30 36 40 30 52 6 -0.82 - 53 0 0 30 20 50 15 39 44.5 18 131 48 30 15 40 30 26 1 30 13 9 30 28 33 -0.82 - 52 0 0 29 57 33 15 39 45.7 19 131 48 29 52 23 30 2 43 29 49 52 30 5 14 -0.82 - 51 0 0 29 34 30 15 39 46.9 20 132 48 29 29 21 29 39 39 29 26 50 29 42 10 -0.82 - 50 0 0 29 11 43 15 39 48.2 21 132 49 29 6 34 29 16 51 29 4 4 29 19 22 -0.83 - 49 0 0 28 49 12 15 39 49.6 22 133 49 28 44 4 28 54 20 28 41 34 28 56 50 -0.83 - 48 0 0 28 26 58 15 39 51.0 23 134 49 28 21 51 28 32 5 28 19 21 28 34 35 -0.83 - 47 0 0 28 5 1 15 39 52.4 24 134 49 27 59 55 28 10 8 27 57 26 28 12 38 -0.83 - 46 0 0 27 43 23 15 39 53.9 25 135 49 27 38 18 27 48 29 27 35 49 27 50 58 -0.83 - 45 0 0 27 22 4 15 39 55.5 26 136 49 27 16 59 27 27 9 27 14 31 27 29 38 -0.83 - 44 0 0 27 1 3 15 39 57.1 26 136 49 26 55 59 27 6 8 26 53 31 27 8 36 -0.83 - 43 0 0 26 40 23 15 39 58.8 27 137 49 26 35 20 26 45 27 26 32 52 26 47 55 -0.83 - 42 0 0 26 20 3 15 40 0.5 28 138 49 26 15 1 26 25 6 26 12 33 26 27 34 -0.83 - 41 0 0 26 0 4 15 40 2.3 29 138 49 25 55 2 26 5 6 25 52 35 26 7 34 -0.84 - 40 0 0 25 40 26 15 40 4.1 30 139 49 25 35 25 25 45 28 25 32 59 25 47 55 -0.84 - 39 0 0 25 21 10 15 40 6.0 31 140 49 25 16 10 25 26 11 25 13 44 25 28 38 -0.84 - 38 0 0 25 2 17 15 40 7.9 32 140 48 24 57 17 25 7 17 24 54 51 25 9 43 -0.84 - 37 0 0 24 43 46 15 40 9.9 32 141 48 24 38 47 24 48 45 24 36 22 24 51 12 -0.84 - 36 0 0 24 25 39 15 40 11.9 33 142 48 24 20 40 24 30 37 24 18 15 24 33 3 -0.84 - 35 0 0 24 7 55 15 40 13.9 34 143 48 24 2 57 24 12 53 24 0 32 24 15 18 -0.84 - 34 0 0 23 50 35 15 40 16.0 35 143 47 23 45 38 23 55 32 23 43 13 23 57 57 -0.84 - 33 0 0 23 33 39 15 40 18.2 36 144 47 23 28 43 23 38 36 23 26 19 23 41 1 -0.84 - 32 0 0 23 17 9 15 40 20.3 36 145 46 23 12 13 23 22 5 23 9 49 23 24 29 -0.84 - 31 0 0 23 1 3 15 40 22.6 37 146 46 22 56 8 23 5 59 22 53 44 23 8 23 -0.84 - 30 0 0 22 45 23 15 40 24.8 38 147 46 22 40 29 22 50 18 22 38 5 22 52 42 -0.84 - 29 0 0 22 30 9 15 40 27.1 39 148 45 22 25 15 22 35 3 22 22 52 22 37 27 -0.84 - 28 0 0 22 15 21 15 40 29.4 39 149 45 22 10 28 22 20 15 22 8 5 22 22 38 -0.84 - 27 0 0 22 1 0 15 40 31.8 40 150 44 21 56 7 22 5 53 21 53 44 22 8 16 -0.85 - 26 0 0 21 47 5 15 40 34.2 41 151 44 21 42 13 21 51 57 21 39 50 21 54 20 -0.85 - 25 0 0 21 33 37 15 40 36.6 41 152 43 21 28 45 21 38 29 21 26 23 21 40 52 -0.85 - 24 0 0 21 20 37 15 40 39.1 42 153 43 21 15 46 21 25 28 21 13 24 21 27 50 -0.85 - 23 0 0 21 8 4 15 40 41.5 42 154 42 21 3 13 21 12 55 21 0 52 21 15 17 -0.85 - 22 0 0 20 55 59 15 40 44.1 43 155 41 20 51 9 21 0 49 20 48 47 21 3 11 -0.85 - 21 0 0 20 44 21 15 40 46.6 44 156 41 20 39 32 20 49 11 20 37 11 20 51 33 -0.85 - 20 0 0 20 33 13 15 40 49.2 44 157 40 20 28 23 20 38 2 20 26 3 20 40 23 -0.85 - 19 0 0 20 22 32 15 40 51.8 45 158 39 20 17 43 20 27 21 20 15 23 20 29 42 -0.85 - 18 0 0 20 12 20 15 40 54.4 45 159 39 20 7 32 20 17 9 20 5 11 20 19 30 -0.85 - 17 0 0 20 2 37 15 40 57.0 46 160 38 19 57 49 20 7 25 19 55 29 20 9 46 -0.85 - 16 0 0 19 53 23 15 40 59.7 46 162 37 19 48 35 19 58 11 19 46 15 20 0 31 -0.85 - 15 0 0 19 44 38 15 41 2.3 47 163 37 19 39 50 19 49 25 19 37 31 19 51 45 -0.85 - 14 0 0 19 36 22 15 41 5.0 47 164 36 19 31 35 19 41 9 19 29 15 19 43 29 -0.85 - 13 0 0 19 28 35 15 41 7.7 47 165 35 19 23 49 19 33 22 19 21 29 19 35 42 -0.85 - 12 0 0 19 21 19 15 41 10.5 48 167 34 19 16 32 19 26 5 19 14 13 19 28 25 -0.85 - 11 0 0 19 14 31 15 41 13.2 48 168 34 19 9 45 19 19 17 19 7 26 19 21 37 -0.85 - 10 0 0 19 8 14 15 41 15.9 48 169 33 19 3 28 19 13 0 19 1 9 19 15 19 -0.85 - 9 0 0 19 2 26 15 41 18.7 49 171 32 18 57 41 19 7 12 18 55 22 19 9 31 -0.85 - 8 0 0 18 57 8 15 41 21.5 49 172 31 18 52 23 19 1 54 18 50 4 19 4 13 -0.85 - 7 0 0 18 52 21 15 41 24.2 49 174 30 18 47 36 18 57 6 18 45 17 18 59 25 -0.85 - 6 0 0 18 48 3 15 41 27.0 49 175 29 18 43 18 18 52 48 18 40 59 18 55 7 -0.85 - 5 0 0 18 44 15 15 41 29.8 49 176 29 18 39 31 18 49 0 18 37 12 18 51 19 -0.85 - 4 0 0 18 40 58 15 41 32.6 49 178 28 18 36 14 18 45 43 18 33 55 18 48 2 -0.85 - 3 0 0 18 38 11 15 41 35.4 49 179 27 18 33 27 18 42 56 18 31 8 18 45 15 -0.85 - 2 0 0 18 35 54 15 41 38.2 49 181 26 18 31 10 18 40 39 18 28 51 18 42 58 -0.85 - 1 0 0 18 34 8 15 41 41.0 49 182 25 18 29 24 18 38 52 18 27 5 18 41 11 -0.85 0 0 0 18 32 52 15 41 43.8 49 184 24 18 28 8 18 37 36 18 25 49 18 39 55 -0.86 1 0 0 18 32 6 15 41 46.6 49 185 23 18 27 22 18 36 50 18 25 4 18 39 9 -0.86 2 0 0 18 31 51 15 41 49.4 49 187 23 18 27 7 18 36 35 18 24 48 18 38 54 -0.86 3 0 0 18 32 6 15 41 52.2 49 188 22 18 27 22 18 36 50 18 25 3 18 39 9 -0.86 4 0 0 18 32 51 15 41 55.0 49 189 21 18 28 7 18 37 36 18 25 49 18 39 55 -0.86 5 0 0 18 34 7 15 41 57.8 49 191 20 18 29 23 18 38 52 18 27 5 18 41 10 -0.86 6 0 0 18 35 53 15 42 0.5 49 192 19 18 31 9 18 40 38 18 28 51 18 42 57 -0.86 7 0 0 18 38 10 15 42 3.3 48 194 18 18 33 25 18 42 54 18 31 7 18 45 13 -0.86 8 0 0 18 40 57 15 42 6.0 48 195 17 18 36 12 18 45 41 18 33 54 18 48 0 -0.86 9 0 0 18 44 13 15 42 8.8 48 196 16 18 39 29 18 48 58 18 37 10 18 51 17 -0.86 10 0 0 18 48 1 15 42 11.5 47 198 15 18 43 16 18 52 46 18 40 57 18 55 5 -0.86 11 0 0 18 52 18 15 42 14.2 47 199 14 18 47 33 18 57 3 18 45 14 18 59 22 -0.86 12 0 0 18 57 5 15 42 16.9 47 200 13 18 52 20 19 1 51 18 50 1 19 4 10 -0.86 13 0 0 19 2 23 15 42 19.6 46 201 12 18 57 37 19 7 8 18 55 18 19 9 28 -0.86 14 0 0 19 8 10 15 42 22.2 46 203 11 19 3 24 19 12 56 19 1 5 19 15 15 -0.86 15 0 0 19 14 27 15 42 24.9 45 204 11 19 9 41 19 19 13 19 7 22 19 21 33 -0.86 16 0 0 19 21 14 15 42 27.5 45 205 10 19 16 28 19 26 0 19 14 8 19 28 20 -0.86 17 0 0 19 28 30 15 42 30.1 44 206 9 19 23 44 19 33 17 19 21 24 19 35 37 -0.86 18 0 0 19 36 16 15 42 32.6 44 207 8 19 31 29 19 41 3 19 29 9 19 43 23 -0.86 19 0 0 19 44 31 15 42 35.2 43 208 7 19 39 44 19 49 18 19 37 24 19 51 39 -0.86 20 0 0 19 53 15 15 42 37.7 43 209 6 19 48 28 19 58 3 19 46 8 20 0 24 -0.86 21 0 0 20 2 29 15 42 40.2 42 210 5 19 57 41 20 7 17 19 55 21 20 9 38 -0.86 22 0 0 20 12 11 15 42 42.6 41 211 4 20 7 23 20 17 0 20 5 2 20 19 20 -0.86 23 0 0 20 22 22 15 42 45.1 41 212 3 20 17 33 20 27 11 20 15 13 20 29 32 -0.86 24 0 0 20 33 2 15 42 47.5 40 213 2 20 28 12 20 37 51 20 25 52 20 40 12 -0.86 25 0 0 20 44 9 15 42 49.8 39 214 1 20 39 20 20 48 59 20 36 59 20 51 21 -0.86 26 0 0 20 55 45 15 42 52.2 39 215 0 20 50 55 21 0 36 20 48 34 21 2 57 -0.86 27 0 0 21 7 49 15 42 54.5 38 216 -1 21 2 59 21 12 40 21 0 37 21 15 2 -0.86 28 0 0 21 20 21 15 42 56.7 37 217 -2 21 15 30 21 25 12 21 13 8 21 27 34 -0.86 29 0 0 21 33 20 15 42 58.9 37 218 -3 21 28 28 21 38 12 21 26 6 21 40 34 -0.86 30 0 0 21 46 46 15 43 1.1 36 218 -4 21 41 54 21 51 39 21 39 32 21 54 1 -0.86 31 0 0 22 0 40 15 43 3.3 35 219 -5 21 55 47 22 5 33 21 53 24 22 7 55 -0.86 32 0 0 22 14 59 15 43 5.4 34 220 -6 22 10 6 22 19 53 22 7 44 22 22 16 -0.86 33 0 0 22 29 46 15 43 7.4 33 221 -7 22 24 52 22 34 40 22 22 29 22 37 3 -0.86 34 0 0 22 44 58 15 43 9.5 33 221 -8 22 40 4 22 49 53 22 37 40 22 52 17 -0.86 35 0 0 23 0 36 15 43 11.4 32 222 -9 22 55 41 23 5 32 22 53 18 23 7 56 -0.86 36 0 0 23 16 40 15 43 13.4 31 223 -10 23 11 44 23 21 36 23 9 20 23 24 0 -0.86 37 0 0 23 33 9 15 43 15.2 30 224 -11 23 28 12 23 38 5 23 25 48 23 40 30 -0.86 38 0 0 23 50 2 15 43 17.1 29 224 -12 23 45 5 23 54 59 23 42 41 23 57 24 -0.86 39 0 0 24 7 20 15 43 18.9 28 225 -12 24 2 22 24 12 18 23 59 57 24 14 43 -0.86 40 0 0 24 25 1 15 43 20.6 28 226 -13 24 20 3 24 30 0 24 17 38 24 32 26 -0.86 41 0 0 24 43 7 15 43 22.3 27 226 -14 24 38 8 24 48 6 24 35 42 24 50 32 -0.86 42 0 0 25 1 35 15 43 24.0 26 227 -15 24 56 36 25 6 35 24 54 10 25 9 1 -0.86 43 0 0 25 20 26 15 43 25.5 25 227 -16 25 15 26 25 25 27 25 13 0 25 27 54 -0.86 44 0 0 25 39 40 15 43 27.1 24 228 -17 25 34 39 25 44 41 25 32 12 25 47 8 -0.86 45 0 0 25 59 15 15 43 28.6 23 229 -18 25 54 13 26 4 17 25 51 46 26 6 44 -0.86 46 0 0 26 19 12 15 43 30.0 22 229 -19 26 14 9 26 24 14 26 11 42 26 26 42 -0.86 47 0 0 26 39 29 15 43 31.4 21 230 -20 26 34 26 26 44 32 26 31 58 26 47 1 -0.86 48 0 0 27 0 7 15 43 32.7 21 230 -21 26 55 3 27 5 11 26 52 35 27 7 39 -0.86 49 0 0 27 21 4 15 43 33.9 20 231 -22 27 16 0 27 26 9 27 13 31 27 28 38 -0.86 50 0 0 27 42 21 15 43 35.1 19 231 -23 27 37 16 27 47 27 27 34 47 27 49 56 -0.86 51 0 0 28 3 56 15 43 36.3 18 232 -24 27 58 50 28 9 3 27 56 21 28 11 32 -0.86 52 0 0 28 25 49 15 43 37.4 17 233 -24 28 20 43 28 30 56 28 18 13 28 33 26 -0.86 53 0 0 28 48 0 15 43 38.4 16 233 -25 28 42 53 28 53 8 28 40 23 28 55 38 -0.86 54 0 0 29 10 28 15 43 39.4 15 234 -26 29 5 20 29 15 36 29 2 49 29 18 7 -0.86 55 0 0 29 33 12 15 43 40.3 14 234 -27 29 28 3 29 38 21 29 25 32 29 40 52 -0.87 56 0 0 29 56 11 15 43 41.2 13 235 -28 29 51 2 30 1 21 29 48 31 30 3 53 -0.87 57 0 0 30 19 26 15 43 42.0 12 235 -29 30 14 16 30 24 37 30 11 44 30 27 8 -0.87 58 0 0 30 42 55 15 43 42.7 11 236 -30 30 37 44 30 48 7 30 35 13 30 50 39 -0.87 59 0 0 31 6 38 15 43 43.4 10 236 -30 31 1 26 31 11 50 30 58 54 31 14 22 -0.87 60 0 0 31 30 33 15 43 44.0 9 237 -31 31 25 21 31 35 46 31 22 49 31 38 19 -0.87 61 0 0 31 54 42 15 43 44.6 8 237 -32 31 49 28 31 59 55 31 46 56 32 2 28 -0.87 62 0 0 32 19 1 15 43 45.1 8 238 -33 32 13 47 32 24 15 32 11 14 32 26 49 -0.88 63 0 0 32 43 32 15 43 45.5 7 239 -34 32 38 17 32 48 46 32 35 44 32 51 20 -0.88 64 0 0 33 8 12 15 43 45.9 6 239 -34 33 2 57 33 13 28 33 0 23 33 16 2 -0.89 65 0 0 33 33 2 15 43 46.2 5 240 -35 33 27 46 33 38 18 33 25 12 33 40 53 -0.89 66 0 0 33 58 1 15 43 46.5 4 240 -36 33 52 44 34 3 18 33 50 10 34 5 52 -0.90 67 0 0 34 23 7 15 43 46.7 3 241 -37 34 17 50 34 28 25 34 15 16 34 31 0 -0.92 68 0 0 34 48 21 15 43 46.8 2 241 -37 34 43 3 34 53 39 34 40 28 34 56 14 -0.95 69 0 0 35 13 41 15 43 46.9 1 242 -38 35 8 23 35 19 0 35 5 48 35 21 35 -1.03 70 0 0 35 39 7 15 43 46.9 0 243 -39 35 33 48 35 44 26 35 31 13 35 47 2 -2.48 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 340-102316 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 36 12.2992 DE: -22 00 20.485 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 36 12.2988 DE: -22 00 20.485 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.0 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3652) Soros asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.31380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 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): 0.018", 0.002", 89.507° remarks: * orbital elements for (3652)Soros : Mean anomaly = 348.0141264422 deg Arg. of pericenter = 62.2124663144 deg Long. of node = 245.3189394661 deg Inclination = 2.2715688409 deg Eccentricity = 0.1924776306 Semimajor axis = 2.3664456296 AU Perihelion dist = 1.9109577818 AU Mag: H = 13.45, G = 0.15 Epoch of elements : MJD 60605.65393600 TDT (2024 Oct 22.6539) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr24,0.35,2024,10,22,15.694469,0.020272,0.648934,21.515850,-0.649455,0.004310,-0.000102,-0.000001,0.000000 -2.5593,-22.0218,-59.32,-11.38,False UCAC4 340-102316,17.60341651,-22.0056903,11.43,10.99,10.75,0.0,0,,17.62801094,-22.0218458,6.86,6.65,0,0,0 3652,Soros,17.85,13.269,2.3138,0,0,5.881,-2.46,,1.0,0 0,347.8371,2024,10,22,62.2125,245.3189,2.2716,0.19248,2.36645,1.91096,13.45,5.0,0.15 1.244,0.0180,0.0018,90,0.0019,Known errors,0.69,0,-1,-1 20241022_102316,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org