IOTA/IOTA-ES occultation update for (1833) Shmakova / UCAC4 367-100416 event on 2024 Oct 20, 08:49 UT Visible from Summary ------- On 2024 Oct 20 UT, the 16.4704443215202 km diameter asteroid (1833) Shmakova will occult a 11.7 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 5.18 mag to 16.87 mag (the magnitude of the asteroid) for at most 0.480 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 20, 08:47 - 2024 Oct 20, 08:51 * geocentric midpoint of event [JD]: 2460603.86796370 * magnitude of target star: 11.70 * magnitude drop [mag]: 5.18 * estimated maximum duration [s]: 0.480 * Moon: 89 % sunlit, 157° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 97°) * approx speed of asteroid's shadow [km/s]: 34.8472 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 367-100416 by 1833 Shmakova 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 40 0 0 54 11 31 8 47 52.6 0 120 25 54 3 39 54 19 25 54 1 25 54 21 40 .... 41 0 0 53 51 34 8 47 52.7 1 121 26 53 43 42 53 59 28 53 41 28 54 1 43 -0.63 42 0 0 53 31 26 8 47 52.7 2 121 26 53 23 34 53 39 20 53 21 20 53 41 35 -0.82 43 0 0 53 11 8 8 47 52.9 3 122 26 53 3 16 53 19 2 53 1 2 53 21 17 -0.91 44 0 0 52 50 40 8 47 53.0 3 123 27 52 42 47 52 58 34 52 40 33 53 0 49 -0.96 45 0 0 52 30 2 8 47 53.2 4 124 27 52 22 10 52 37 56 52 19 56 52 40 11 -0.99 46 0 0 52 9 15 8 47 53.5 5 125 27 52 1 23 52 17 9 51 59 9 52 19 24 -1.02 47 0 0 51 48 20 8 47 53.8 5 125 28 51 40 28 51 56 13 51 38 14 51 58 28 -1.03 48 0 0 51 27 16 8 47 54.1 6 126 28 51 19 24 51 35 10 51 17 10 51 37 25 -1.05 49 0 0 51 6 5 8 47 54.5 7 127 28 50 58 13 51 13 58 50 56 0 51 16 13 -1.06 50 0 0 50 44 47 8 47 54.9 7 128 29 50 36 55 50 52 40 50 34 42 50 54 55 -1.07 51 0 0 50 23 22 8 47 55.4 8 129 29 50 15 31 50 31 15 50 13 17 50 33 30 -1.07 52 0 0 50 1 52 8 47 55.9 9 129 29 49 54 1 50 9 44 49 51 47 50 11 59 -1.08 53 0 0 49 40 16 8 47 56.5 10 130 29 49 32 25 49 48 8 49 30 12 49 50 22 -1.08 54 0 0 49 18 35 8 47 57.1 10 131 30 49 10 45 49 26 27 49 8 32 49 28 41 -1.09 55 0 0 48 56 51 8 47 57.8 11 132 30 48 49 1 49 4 42 48 46 48 49 6 56 -1.09 56 0 0 48 35 2 8 47 58.6 12 133 30 48 27 13 48 42 53 48 25 0 48 45 7 -1.10 57 0 0 48 13 11 8 47 59.3 13 133 30 48 5 22 48 21 1 48 3 9 48 23 15 -1.10 58 0 0 47 51 17 8 48 0.2 13 134 30 47 43 29 47 59 7 47 41 16 48 1 20 -1.10 59 0 0 47 29 22 8 48 1.0 14 135 31 47 21 35 47 37 11 47 19 22 47 39 24 -1.10 60 0 0 47 7 26 8 48 2.0 15 136 31 46 59 39 47 15 14 46 57 27 47 17 27 -1.11 61 0 0 46 45 29 8 48 3.0 16 136 31 46 37 43 46 53 17 46 35 31 46 55 30 -1.11 62 0 0 46 23 33 8 48 4.0 16 137 31 46 15 48 46 31 20 46 13 35 46 33 33 -1.11 63 0 0 46 1 38 8 48 5.1 17 138 31 45 53 53 46 9 24 45 51 41 46 11 37 -1.11 64 0 0 45 39 44 8 48 6.3 18 139 31 45 32 0 45 47 29 45 29 48 45 49 42 -1.11 65 0 0 45 17 53 8 48 7.5 18 140 31 45 10 9 45 25 37 45 7 58 45 27 49 -1.12 66 0 0 44 56 4 8 48 8.7 19 141 31 44 48 22 45 3 48 44 46 11 45 6 0 -1.12 67 0 0 44 34 19 8 48 10.0 20 141 31 44 26 38 44 42 2 44 24 27 44 44 14 -1.12 68 0 0 44 12 39 8 48 11.4 21 142 31 44 4 58 44 20 21 44 2 47 44 22 32 -1.12 69 0 0 43 51 3 8 48 12.8 21 143 31 43 43 23 43 58 44 43 41 13 44 0 55 -1.12 70 0 0 43 29 33 8 48 14.3 22 144 31 43 21 54 43 37 13 43 19 44 43 39 24 -1.12 71 0 0 43 8 9 8 48 15.8 23 145 31 43 0 31 43 15 49 42 58 22 43 17 59 -1.12 72 0 0 42 46 53 8 48 17.3 24 146 31 42 39 16 42 54 31 42 37 6 42 56 41 -1.13 73 0 0 42 25 43 8 48 19.0 24 146 31 42 18 7 42 33 21 42 15 58 42 35 31 -1.13 74 0 0 42 4 43 8 48 20.6 25 147 31 41 57 8 42 12 19 41 54 58 42 14 29 -1.13 75 0 0 41 43 51 8 48 22.4 26 148 31 41 36 17 41 51 26 41 34 8 41 53 36 -1.13 76 0 0 41 23 8 8 48 24.1 26 149 30 41 15 35 41 30 43 41 13 27 41 32 52 -1.13 77 0 0 41 2 36 8 48 25.9 27 150 30 40 55 4 41 10 9 40 52 56 41 12 19 -1.13 78 0 0 40 42 15 8 48 27.8 28 151 30 40 34 44 40 49 47 40 32 36 40 51 56 -1.13 79 0 0 40 22 6 8 48 29.7 28 152 30 40 14 36 40 29 37 40 12 28 40 31 45 -1.13 80 0 0 40 2 8 8 48 31.7 29 153 30 39 54 39 40 9 38 39 52 32 40 11 47 -1.13 81 0 0 39 42 23 8 48 33.7 30 154 29 39 34 55 39 49 52 39 32 48 39 52 0 -1.13 82 0 0 39 22 52 8 48 35.7 30 155 29 39 15 25 39 30 20 39 13 18 39 32 27 -1.14 83 0 0 39 3 34 8 48 37.8 31 156 29 38 56 8 39 11 1 38 54 1 39 13 8 -1.14 84 0 0 38 44 30 8 48 40.0 31 157 28 38 37 5 38 51 56 38 34 59 38 54 3 -1.14 85 0 0 38 25 42 8 48 42.2 32 158 28 38 18 18 38 33 6 38 16 12 38 35 13 -1.14 86 0 0 38 7 8 8 48 44.4 33 159 28 37 59 46 38 14 32 37 57 40 38 16 39 -1.14 87 0 0 37 48 51 8 48 46.6 33 160 27 37 41 30 37 56 14 37 39 24 37 58 20 -1.14 88 0 0 37 30 51 8 48 48.9 34 161 27 37 23 30 37 38 12 37 21 25 37 40 18 -1.14 89 0 0 37 13 7 8 48 51.3 34 162 26 37 5 48 37 20 28 37 3 43 37 22 33 -1.14 90 0 0 36 55 42 8 48 53.7 35 163 26 36 48 23 37 3 1 36 46 19 37 5 6 -1.14 91 0 0 36 38 34 8 48 56.1 35 164 25 36 31 16 36 45 53 36 29 12 36 47 57 -1.14 92 0 0 36 21 45 8 48 58.5 36 165 25 36 14 28 36 29 3 36 12 25 36 31 7 -1.14 93 0 0 36 5 15 8 49 1.0 36 166 24 35 57 59 36 12 32 35 55 56 36 14 36 -1.14 94 0 0 35 49 4 8 49 3.5 37 167 24 35 41 50 35 56 20 35 39 46 35 58 24 -1.14 95 0 0 35 33 14 8 49 6.0 37 169 23 35 26 0 35 40 28 35 23 57 35 42 32 -1.14 96 0 0 35 17 43 8 49 8.6 38 170 23 35 10 31 35 24 57 35 8 28 35 27 0 -1.14 97 0 0 35 2 33 8 49 11.1 38 171 22 34 55 22 35 9 46 34 53 19 35 11 49 -1.15 98 0 0 34 47 45 8 49 13.7 38 172 22 34 40 34 34 54 57 34 38 32 34 57 0 -1.15 99 0 0 34 33 18 8 49 16.4 39 173 21 34 26 8 34 40 29 34 24 6 34 42 31 -1.15 100 0 0 34 19 13 8 49 19.0 39 175 20 34 12 4 34 26 23 34 10 2 34 28 25 -1.15 101 0 0 34 5 30 8 49 21.7 39 176 20 33 58 22 34 12 39 33 56 20 34 14 41 -1.15 102 0 0 33 52 9 8 49 24.4 40 177 19 33 45 2 33 59 17 33 43 1 34 1 19 -1.15 103 0 0 33 39 12 8 49 27.1 40 178 19 33 32 5 33 46 19 33 30 4 33 48 21 -1.15 104 0 0 33 26 37 8 49 29.8 40 180 18 33 19 32 33 33 44 33 17 31 33 35 45 -1.15 105 0 0 33 14 27 8 49 32.6 40 181 17 33 7 22 33 21 33 33 5 21 33 23 34 -1.15 106 0 0 33 2 40 8 49 35.3 40 182 17 32 55 36 33 9 45 32 53 35 33 11 46 -1.15 107 0 0 32 51 17 8 49 38.1 41 183 16 32 44 13 32 58 21 32 42 13 33 0 22 -1.15 108 0 0 32 40 18 8 49 40.8 41 185 15 32 33 15 32 47 22 32 31 15 32 49 22 -1.15 109 0 0 32 29 44 8 49 43.6 41 186 14 32 22 42 32 36 47 32 20 42 32 38 47 -1.15 110 0 0 32 19 35 8 49 46.4 41 187 14 32 12 33 32 26 37 32 10 34 32 28 37 -1.15 111 0 0 32 9 50 8 49 49.2 41 189 13 32 2 50 32 16 52 32 0 50 32 18 52 -1.15 112 0 0 32 0 31 8 49 51.9 41 190 12 31 53 32 32 7 32 31 51 32 32 9 32 -1.15 113 0 0 31 51 38 8 49 54.7 41 191 11 31 44 39 31 58 38 31 42 40 32 0 38 -1.15 114 0 0 31 43 10 8 49 57.5 41 192 11 31 36 11 31 50 10 31 34 12 31 52 9 -1.15 115 0 0 31 35 8 8 50 0.3 41 194 10 31 28 10 31 42 7 31 26 11 31 44 7 -1.15 116 0 0 31 27 32 8 50 3.1 41 195 9 31 20 34 31 34 31 31 18 36 31 36 30 -1.15 117 0 0 31 20 22 8 50 5.8 41 196 8 31 13 25 31 27 21 31 11 27 31 29 20 -1.15 118 0 0 31 13 39 8 50 8.6 40 197 8 31 6 42 31 20 37 31 4 44 31 22 36 -1.15 119 0 0 31 7 22 8 50 11.4 40 199 7 31 0 25 31 14 19 30 58 27 31 16 18 -1.16 120 0 0 31 1 31 8 50 14.1 40 200 6 30 54 35 31 8 28 30 52 37 31 10 27 -1.16 121 0 0 30 56 8 8 50 16.8 40 201 5 30 49 12 31 3 4 30 47 14 31 5 3 -1.16 122 0 0 30 51 11 8 50 19.6 40 202 4 30 44 15 30 58 7 30 42 17 31 0 5 -1.16 123 0 0 30 46 41 8 50 22.3 39 204 4 30 39 46 30 53 36 30 37 48 30 55 35 -1.16 124 0 0 30 42 38 8 50 25.0 39 205 3 30 35 43 30 49 33 30 33 45 30 51 32 -1.16 125 0 0 30 39 2 8 50 27.6 39 206 2 30 32 7 30 45 57 30 30 9 30 47 55 -1.16 126 0 0 30 35 53 8 50 30.3 38 207 1 30 28 58 30 42 48 30 27 1 30 44 46 -1.16 127 0 0 30 33 11 8 50 32.9 38 208 0 30 26 17 30 40 6 30 24 19 30 42 4 -1.16 128 0 0 30 30 57 8 50 35.5 38 209 -1 30 24 3 30 37 51 30 22 5 30 39 50 -1.16 129 0 0 30 29 10 8 50 38.1 37 210 -1 30 22 16 30 36 4 30 20 18 30 38 2 -1.16 130 0 0 30 27 50 8 50 40.7 37 212 -2 30 20 56 30 34 44 30 18 59 30 36 42 -1.16 131 0 0 30 26 57 8 50 43.2 36 213 -3 30 20 4 30 33 52 30 18 6 30 35 50 -1.16 132 0 0 30 26 32 8 50 45.7 36 214 -4 30 19 39 30 33 27 30 17 41 30 35 25 -1.16 133 0 0 30 26 34 8 50 48.2 35 215 -5 30 19 41 30 33 29 30 17 43 30 35 27 -1.16 134 0 0 30 27 4 8 50 50.6 35 216 -6 30 20 10 30 33 58 30 18 13 30 35 56 -1.16 135 0 0 30 28 0 8 50 53.1 34 217 -7 30 21 7 30 34 55 30 19 9 30 36 53 -1.16 136 0 0 30 29 24 8 50 55.4 34 218 -7 30 22 30 30 36 19 30 20 33 30 38 17 -1.16 137 0 0 30 31 15 8 50 57.8 33 219 -8 30 24 22 30 38 10 30 22 24 30 40 8 -1.16 138 0 0 30 33 34 8 51 0.1 33 220 -9 30 26 40 30 40 28 30 24 42 30 42 27 -1.16 139 0 0 30 36 19 8 51 2.4 32 220 -10 30 29 25 30 43 14 30 27 27 30 45 12 -1.16 140 0 0 30 39 31 8 51 4.6 31 221 -11 30 32 37 30 46 27 30 30 40 30 48 25 -1.16 141 0 0 30 43 11 8 51 6.8 31 222 -12 30 36 17 30 50 7 30 34 19 30 52 5 -1.16 142 0 0 30 47 18 8 51 9.0 30 223 -13 30 40 23 30 54 14 30 38 26 30 56 12 -1.16 143 0 0 30 51 51 8 51 11.1 30 224 -14 30 44 56 30 58 47 30 42 58 31 0 46 -1.16 144 0 0 30 56 51 8 51 13.1 29 225 -14 30 49 55 31 3 47 30 47 58 31 5 46 -1.16 145 0 0 31 2 17 8 51 15.2 28 226 -15 30 55 22 31 9 14 30 53 24 31 11 13 -1.16 146 0 0 31 8 10 8 51 17.2 28 226 -16 31 1 14 31 15 7 30 59 16 31 17 6 -1.16 147 0 0 31 14 29 8 51 19.1 27 227 -17 31 7 33 31 21 27 31 5 35 31 23 26 -1.16 148 0 0 31 21 15 8 51 21.0 26 228 -18 31 14 18 31 28 13 31 12 19 31 30 12 -1.16 149 0 0 31 28 26 8 51 22.8 25 229 -19 31 21 29 31 35 24 31 19 30 31 37 24 -1.16 150 0 0 31 36 3 8 51 24.6 25 229 -20 31 29 6 31 43 2 31 27 7 31 45 1 -1.16 151 0 0 31 44 6 8 51 26.4 24 230 -20 31 37 8 31 51 6 31 35 9 31 53 5 -1.16 152 0 0 31 52 35 8 51 28.0 23 231 -21 31 45 36 31 59 35 31 43 37 32 1 34 -1.16 153 0 0 32 1 28 8 51 29.7 22 232 -22 31 54 29 32 8 29 31 52 30 32 10 29 -1.16 154 0 0 32 10 47 8 51 31.3 22 232 -23 32 3 47 32 17 48 32 1 48 32 19 48 -1.16 155 0 0 32 20 31 8 51 32.8 21 233 -24 32 13 30 32 27 32 32 11 31 32 29 32 -1.17 156 0 0 32 30 39 8 51 34.3 20 234 -25 32 23 38 32 37 41 32 21 38 32 39 42 -1.17 157 0 0 32 41 12 8 51 35.7 19 234 -26 32 34 10 32 48 15 32 32 10 32 50 15 -1.17 158 0 0 32 52 8 8 51 37.1 19 235 -26 32 45 6 32 59 12 32 43 6 33 1 13 -1.17 159 0 0 33 3 29 8 51 38.4 18 236 -27 32 56 26 33 10 34 32 54 26 33 12 34 -1.17 160 0 0 33 15 14 8 51 39.6 17 236 -28 33 8 10 33 22 19 33 6 9 33 24 20 -1.17 161 0 0 33 27 21 8 51 40.8 16 237 -29 33 20 16 33 34 27 33 18 16 33 36 28 -1.17 162 0 0 33 39 52 8 51 42.0 15 238 -30 33 32 46 33 46 59 33 30 46 33 49 0 -1.17 163 0 0 33 52 46 8 51 43.0 14 238 -30 33 45 39 33 59 53 33 43 38 34 1 55 -1.17 164 0 0 34 6 1 8 51 44.0 14 239 -31 33 58 54 34 13 10 33 56 53 34 15 12 -1.17 165 0 0 34 19 39 8 51 45.0 13 239 -32 34 12 31 34 26 49 34 10 30 34 28 51 -1.17 166 0 0 34 33 39 8 51 45.9 12 240 -33 34 26 30 34 40 49 34 24 28 34 42 52 -1.18 167 0 0 34 48 0 8 51 46.7 11 241 -34 34 40 50 34 55 11 34 38 48 34 57 14 -1.18 168 0 0 35 2 42 8 51 47.5 10 241 -34 34 55 32 35 9 54 34 53 29 35 11 57 -1.18 169 0 0 35 17 45 8 51 48.2 9 242 -35 35 10 34 35 24 58 35 8 31 35 27 1 -1.18 170 0 0 35 33 8 8 51 48.9 9 242 -36 35 25 56 35 40 22 35 23 53 35 42 25 -1.19 171 0 0 35 48 51 8 51 49.5 8 243 -37 35 41 38 35 56 6 35 39 35 35 58 9 -1.19 172 0 0 36 4 53 8 51 50.0 7 244 -37 35 57 39 36 12 9 35 55 36 36 14 13 -1.19 173 0 0 36 21 15 8 51 50.5 6 244 -38 36 13 59 36 28 31 36 11 56 36 30 36 -1.20 174 0 0 36 37 55 8 51 50.9 5 245 -39 36 30 38 36 45 12 36 28 35 36 47 17 -1.21 175 0 0 36 54 53 8 51 51.2 4 245 -39 36 47 35 37 2 11 36 45 31 37 4 16 -1.22 176 0 0 37 12 9 8 51 51.5 4 246 -40 37 4 50 37 19 28 37 2 46 37 21 33 -1.24 177 0 0 37 29 42 8 51 51.7 3 247 -41 37 22 22 37 37 2 37 20 17 37 39 8 -1.26 178 0 0 37 47 31 8 51 51.9 2 247 -41 37 40 11 37 54 53 37 38 6 37 56 59 -1.31 179 0 0 38 5 37 8 51 52.0 1 248 -42 37 58 16 38 13 0 37 56 10 38 15 6 -1.45 180 0 0 38 23 59 8 51 52.0 0 249 -42 38 16 36 38 31 22 38 14 31 38 33 29 -3.19 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 367-100416 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 42 52.1516 DE: -16 36 33.906 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 42 52.1516 DE: -16 36 33.906 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 13.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1833) Shmakova asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.71010 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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", 0.001", 97.037° remarks: * orbital elements for (1833)Shmakova : Mean anomaly = 340.4643022938 deg Arg. of pericenter = 153.3241060985 deg Long. of node = 158.0427765392 deg Inclination = 10.0089322826 deg Eccentricity = 0.1135828480 Semimajor axis = 2.6346543574 AU Perihelion dist = 2.3354028120 AU Mag: H = 11.80, G = 0.15 Epoch of elements : MJD 60603.36796354 TDT (2024 Oct 20.3680) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.48,2024,10,20,8.831129,0.114454,0.745461,19.438479,-3.000670,0.004800,0.000205,-0.000001,0.000000 104.2959,-16.6212,43.72,-10.57,False UCAC4 367-100416,17.71448661,-16.6094182,13.05,11.70,10.97,0.1,0,,17.73814129,-16.6212013,5.17,5.45,0,0,0 1833,Shmakova,16.87,16.667,2.7101,0,0,4.389,-9.73,,1.4,0 0,340.3795,2024,10,20,153.3241,158.0428,10.0089,0.11358,2.63465,2.33540,11.80,5.0,0.15 1.142,0.0110,0.0012,97,0.0012,Known errors,0.80,0,-1,-1 20241020_100416,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org