IOTA/IOTA-ES occultation update for (111) Ate / UCAC4 328-133848 event on 2024 Oct 21, 19:01 UT Visible from Summary ------- On 2024 Oct 21 UT, the 133.416671075375 km diameter asteroid (111) Ate will occult a 11.8 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.30 mag to 13.94 mag (the magnitude of the asteroid) for at most 4.630 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 21, 18:58 - 2024 Oct 21, 19:03 * geocentric midpoint of event [JD]: 2460605.29238058 * magnitude of target star: 11.78 * magnitude drop [mag]: 2.30 * estimated maximum duration [s]: 4.630 * Moon: 75 % sunlit, 173° distance * Sun: 65° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 194 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.002", 83°) * approx speed of asteroid's shadow [km/s]: 28.8896 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 328-133848 by 111 Ate on 2024 Oct 21 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 -111 0 0 37 4 19 18 58 30.2 0 121 42 36 3 38 .. .. .. 36 0 13 .. .. .. .... -110 0 0 36 35 16 18 58 30.2 1 122 42 35 34 48 37 37 3 35 31 25 37 40 36 -0.30 -109 0 0 36 6 28 18 58 30.4 2 122 43 35 6 15 37 8 0 35 2 52 37 11 33 -0.67 -108 0 0 35 37 58 18 58 30.6 3 123 43 34 37 59 36 39 15 34 34 36 36 42 46 -0.79 -107 0 0 35 9 45 18 58 30.9 4 124 44 34 10 0 36 10 47 34 6 38 36 14 17 -0.86 -106 0 0 34 41 50 18 58 31.2 5 124 44 33 42 20 35 42 37 33 38 59 35 46 7 -0.89 -105 0 0 34 14 16 18 58 31.7 6 125 45 33 14 59 35 14 47 33 11 39 35 18 16 -0.92 -104 0 0 33 47 1 18 58 32.3 7 125 45 32 47 59 34 47 18 32 44 40 34 50 46 -0.94 -103 0 0 33 20 8 18 58 32.9 8 126 45 32 21 20 34 20 10 32 18 1 34 23 37 -0.95 -102 0 0 32 53 37 18 58 33.7 8 126 46 31 55 2 33 53 24 31 51 45 33 56 50 -0.96 -101 0 0 32 27 29 18 58 34.5 9 127 46 31 29 8 33 27 1 31 25 51 33 30 26 -0.97 -100 0 0 32 1 44 18 58 35.4 10 128 46 31 3 37 33 1 1 31 0 21 33 4 26 -0.98 - 99 0 0 31 36 23 18 58 36.4 11 128 46 30 38 30 32 35 26 30 35 14 32 38 50 -0.99 - 98 0 0 31 11 28 18 58 37.5 12 129 47 30 13 48 32 10 17 30 10 33 32 13 39 -0.99 - 97 0 0 30 46 58 18 58 38.6 13 129 47 29 49 31 31 45 32 29 46 17 31 48 54 -1.00 - 96 0 0 30 22 54 18 58 39.9 14 130 47 29 25 40 31 21 15 29 22 27 31 24 36 -1.00 - 95 0 0 29 59 17 18 58 41.2 15 130 47 29 2 17 30 57 25 28 59 4 31 0 45 -1.00 - 94 0 0 29 36 8 18 58 42.7 16 131 47 28 39 20 30 34 2 28 36 9 30 37 21 -1.01 - 93 0 0 29 13 27 18 58 44.2 17 131 47 28 16 52 30 11 8 28 13 41 30 14 26 -1.01 - 92 0 0 28 51 15 18 58 45.7 18 132 47 27 54 52 29 48 42 27 51 41 29 52 0 -1.01 - 91 0 0 28 29 32 18 58 47.4 19 133 47 27 33 21 29 26 47 27 30 11 29 30 4 -1.02 - 90 0 0 28 8 18 18 58 49.1 20 133 47 27 12 19 29 5 21 27 9 10 29 8 37 -1.02 - 89 0 0 27 47 35 18 58 51.0 20 134 47 26 51 47 28 44 25 26 48 39 28 47 41 -1.02 - 88 0 0 27 27 23 18 58 52.9 21 134 47 26 31 46 28 24 1 26 28 39 28 27 16 -1.02 - 87 0 0 27 7 42 18 58 54.8 22 135 47 26 12 16 28 4 8 26 9 9 28 7 22 -1.02 - 86 0 0 26 48 32 18 58 56.9 23 136 46 25 53 17 27 44 47 25 50 10 27 48 1 -1.03 - 85 0 0 26 29 54 18 58 59.0 24 136 46 25 34 50 27 25 58 25 31 44 27 29 11 -1.03 - 84 0 0 26 11 48 18 59 1.2 25 137 46 25 16 54 27 7 42 25 13 49 27 10 54 -1.03 - 83 0 0 25 54 16 18 59 3.5 26 138 45 24 59 31 26 49 58 24 56 27 26 53 10 -1.03 - 82 0 0 25 37 16 18 59 5.8 26 138 45 24 42 41 26 32 48 24 39 37 26 36 0 -1.03 - 81 0 0 25 20 49 18 59 8.2 27 139 45 24 26 24 26 16 12 24 23 20 26 19 23 -1.03 - 80 0 0 25 4 57 18 59 10.7 28 140 44 24 10 41 26 0 10 24 7 37 26 3 20 -1.03 - 79 0 0 24 49 38 18 59 13.2 29 140 44 23 55 31 25 44 42 23 52 28 25 47 52 -1.03 - 78 0 0 24 34 54 18 59 15.8 29 141 44 23 40 54 25 29 49 23 37 52 25 32 58 -1.04 - 77 0 0 24 20 44 18 59 18.4 30 142 43 23 26 52 25 15 30 23 23 51 25 18 39 -1.04 - 76 0 0 24 7 8 18 59 21.1 31 143 43 23 13 25 25 1 47 23 10 23 25 4 55 -1.04 - 75 0 0 23 54 8 18 59 23.9 32 143 42 23 0 32 24 48 39 22 57 31 24 51 47 -1.04 - 74 0 0 23 41 43 18 59 26.7 32 144 41 22 48 14 24 36 7 22 45 14 24 39 14 -1.04 - 73 0 0 23 29 53 18 59 29.6 33 145 41 22 36 31 24 24 10 22 33 31 24 27 16 -1.04 - 72 0 0 23 18 39 18 59 32.5 34 146 40 22 25 24 24 12 49 22 22 24 24 15 55 -1.04 - 71 0 0 23 8 1 18 59 35.5 34 147 40 22 14 51 24 2 4 22 11 52 24 5 10 -1.04 - 70 0 0 22 57 58 18 59 38.5 35 148 39 22 4 55 23 51 56 22 1 55 23 55 1 -1.04 - 69 0 0 22 48 32 18 59 41.6 36 149 38 21 55 33 23 42 23 21 52 34 23 45 29 -1.04 - 68 0 0 22 39 42 18 59 44.7 36 149 38 21 46 48 23 33 28 21 43 49 23 36 33 -1.04 - 67 0 0 22 31 28 18 59 47.9 37 150 37 21 38 39 23 25 9 21 35 40 23 28 14 -1.05 - 66 0 0 22 23 50 18 59 51.1 37 151 36 21 31 6 23 17 27 21 28 8 23 20 31 -1.05 - 65 0 0 22 16 49 18 59 54.3 38 152 36 21 24 9 23 10 22 21 21 11 23 13 26 -1.05 - 64 0 0 22 10 25 18 59 57.6 39 153 35 21 17 48 23 3 54 21 14 50 23 6 58 -1.05 - 63 0 0 22 4 37 19 0 0.9 39 154 34 21 12 4 22 58 3 21 9 6 23 1 6 -1.05 - 62 0 0 21 59 27 19 0 4.3 40 155 33 21 6 56 22 52 49 21 3 59 22 55 52 -1.05 - 61 0 0 21 54 53 19 0 7.6 40 157 33 21 2 25 22 48 12 20 59 28 22 51 16 -1.05 - 60 0 0 21 50 56 19 0 11.0 40 158 32 20 58 30 22 44 13 20 55 33 22 47 17 -1.05 - 59 0 0 21 47 36 19 0 14.5 41 159 31 20 55 12 22 40 52 20 52 15 22 43 55 -1.05 - 58 0 0 21 44 54 19 0 18.0 41 160 30 20 52 31 22 38 7 20 49 34 22 41 10 -1.05 - 57 0 0 21 42 48 19 0 21.5 42 161 29 20 50 27 22 36 0 20 47 30 22 39 3 -1.05 - 56 0 0 21 41 20 19 0 25.0 42 162 29 20 48 59 22 34 31 20 46 2 22 37 34 -1.05 - 55 0 0 21 40 28 19 0 28.5 42 163 28 20 48 8 22 33 40 20 45 11 22 36 42 -1.05 - 54 0 0 21 40 14 19 0 32.1 42 165 27 20 47 54 22 33 25 20 44 58 22 36 28 -1.05 - 53 0 0 21 40 37 19 0 35.6 43 166 26 20 48 17 22 33 49 20 45 20 22 36 52 -1.05 - 52 0 0 21 41 38 19 0 39.2 43 167 25 20 49 17 22 34 50 20 46 20 22 37 53 -1.05 - 51 0 0 21 43 15 19 0 42.8 43 168 24 20 50 54 22 36 29 20 47 57 22 39 32 -1.05 - 50 0 0 21 45 30 19 0 46.4 43 169 23 20 53 7 22 38 45 20 50 10 22 41 48 -1.05 - 49 0 0 21 48 22 19 0 50.1 43 171 23 20 55 57 22 41 39 20 53 0 22 44 42 -1.05 - 48 0 0 21 51 51 19 0 53.7 43 172 22 20 59 24 22 45 10 20 56 27 22 48 13 -1.05 - 47 0 0 21 55 57 19 0 57.3 43 173 21 21 3 28 22 49 19 21 0 30 22 52 22 -1.06 - 46 0 0 22 0 41 19 1 1.0 43 175 20 21 8 8 22 54 5 21 5 11 22 57 8 -1.06 - 45 0 0 22 6 1 19 1 4.6 43 176 19 21 13 26 22 59 28 21 10 28 23 2 32 -1.06 - 44 0 0 22 11 58 19 1 8.3 43 177 18 21 19 19 23 5 29 21 16 21 23 8 34 -1.06 - 43 0 0 22 18 33 19 1 11.9 43 178 17 21 25 50 23 12 8 21 22 52 23 15 12 -1.06 - 42 0 0 22 25 44 19 1 15.5 43 180 16 21 32 56 23 19 23 21 29 58 23 22 28 -1.06 - 41 0 0 22 33 31 19 1 19.2 43 181 15 21 40 40 23 27 16 21 37 41 23 30 21 -1.06 - 40 0 0 22 41 56 19 1 22.8 43 182 14 21 48 59 23 35 45 21 46 0 23 38 51 -1.06 - 39 0 0 22 50 57 19 1 26.4 43 183 13 21 57 55 23 44 52 21 54 55 23 47 57 -1.06 - 38 0 0 23 0 34 19 1 30.0 43 185 12 22 7 26 23 54 35 22 4 27 23 57 41 -1.06 - 37 0 0 23 10 48 19 1 33.6 42 186 12 22 17 34 24 4 55 22 14 34 24 8 1 -1.06 - 36 0 0 23 21 37 19 1 37.2 42 187 11 22 28 17 24 15 51 22 25 17 24 18 58 -1.06 - 35 0 0 23 33 3 19 1 40.7 42 188 10 22 39 36 24 27 24 22 36 36 24 30 31 -1.06 - 34 0 0 23 45 4 19 1 44.2 41 189 9 22 51 31 24 39 33 22 48 30 24 42 40 -1.06 - 33 0 0 23 57 41 19 1 47.7 41 191 8 23 4 0 24 52 18 23 0 59 24 55 25 -1.06 - 32 0 0 24 10 54 19 1 51.2 41 192 7 23 17 5 25 5 38 23 14 3 25 8 47 -1.06 - 31 0 0 24 24 42 19 1 54.7 40 193 6 23 30 45 25 19 34 23 27 43 25 22 43 -1.06 - 30 0 0 24 39 4 19 1 58.1 40 194 5 23 45 0 25 34 6 23 41 57 25 37 15 -1.06 - 29 0 0 24 54 2 19 2 1.5 39 195 4 23 59 48 25 49 13 23 56 45 25 52 22 -1.06 - 28 0 0 25 9 34 19 2 4.9 39 196 3 24 15 11 26 4 54 24 12 8 26 8 4 -1.06 - 27 0 0 25 25 40 19 2 8.2 38 197 2 24 31 8 26 21 10 24 28 4 26 24 21 -1.06 - 26 0 0 25 42 21 19 2 11.5 38 198 1 24 47 39 26 38 0 24 44 34 26 41 12 -1.06 - 25 0 0 25 59 34 19 2 14.7 37 199 0 25 4 43 26 55 25 25 1 38 26 58 37 -1.06 - 24 0 0 26 17 22 19 2 18.0 36 200 -1 25 22 20 27 13 23 25 19 14 27 16 36 -1.06 - 23 0 0 26 35 42 19 2 21.1 36 201 -2 25 40 30 27 31 54 25 37 23 27 35 7 -1.06 - 22 0 0 26 54 35 19 2 24.2 35 202 -3 25 59 12 27 50 58 25 56 5 27 54 12 -1.06 - 21 0 0 27 14 0 19 2 27.3 35 203 -4 26 18 26 28 10 35 26 15 18 28 13 50 -1.06 - 20 0 0 27 33 56 19 2 30.3 34 204 -5 26 38 11 28 30 44 26 35 3 28 33 59 -1.06 - 19 0 0 27 54 24 19 2 33.3 33 205 -6 26 58 28 28 51 24 26 55 19 28 54 40 -1.06 - 18 0 0 28 15 23 19 2 36.2 33 206 -7 27 19 15 29 12 35 27 16 5 29 15 52 -1.06 - 17 0 0 28 36 53 19 2 39.1 32 207 -7 27 40 32 29 34 18 27 37 22 29 37 36 -1.06 - 16 0 0 28 58 53 19 2 41.9 31 208 -8 28 2 20 29 56 30 27 59 9 29 59 49 -1.06 - 15 0 0 29 21 22 19 2 44.6 30 209 -9 28 24 36 30 19 13 28 21 25 30 22 32 -1.06 - 14 0 0 29 44 20 19 2 47.3 30 210 -10 28 47 21 30 42 24 28 44 9 30 45 44 -1.06 - 13 0 0 30 7 46 19 2 49.9 29 210 -11 29 10 34 31 6 4 29 7 21 31 9 25 -1.06 - 12 0 0 30 31 40 19 2 52.5 28 211 -12 29 34 15 31 30 12 29 31 2 31 33 34 -1.06 - 11 0 0 30 56 1 19 2 55.0 27 212 -13 29 58 23 31 54 47 29 55 9 31 58 10 -1.06 - 10 0 0 31 20 48 19 2 57.4 26 213 -14 30 22 57 32 19 49 30 19 42 32 23 12 -1.06 - 9 0 0 31 46 2 19 2 59.8 26 214 -15 30 47 57 32 45 17 30 44 41 32 48 41 -1.06 - 8 0 0 32 11 40 19 3 2.0 25 214 -16 31 13 21 33 11 10 31 10 4 33 14 35 -1.06 - 7 0 0 32 37 43 19 3 4.2 24 215 -17 31 39 10 33 37 27 31 35 52 33 40 53 -1.06 - 6 0 0 33 4 9 19 3 6.4 23 216 -17 32 5 22 34 4 9 32 2 4 34 7 36 -1.06 - 5 0 0 33 30 58 19 3 8.4 22 216 -18 32 31 57 34 31 13 32 28 38 34 34 41 -1.06 - 4 0 0 33 58 9 19 3 10.4 21 217 -19 32 58 54 34 58 39 32 55 34 35 2 8 -1.06 - 3 0 0 34 25 42 19 3 12.3 20 218 -20 33 26 12 35 26 27 33 22 52 35 29 56 -1.06 - 2 0 0 34 53 34 19 3 14.1 20 219 -21 33 53 51 35 54 35 33 50 29 35 58 5 -1.06 - 1 0 0 35 21 47 19 3 15.9 19 219 -22 34 21 49 36 23 2 34 18 27 36 26 33 -1.06 0 0 0 35 50 17 19 3 17.5 18 220 -22 34 50 5 36 51 48 34 46 42 36 55 20 -1.06 1 0 0 36 19 5 19 3 19.1 17 221 -23 35 18 39 37 20 52 35 15 15 37 24 25 -1.06 2 0 0 36 48 10 19 3 20.6 16 221 -24 35 47 30 37 50 12 35 44 5 37 53 46 -1.06 3 0 0 37 17 31 19 3 22.0 15 222 -25 36 16 36 38 19 47 36 13 11 38 23 22 -1.06 4 0 0 37 47 6 19 3 23.3 14 223 -25 36 45 57 38 49 38 36 42 31 38 53 13 -1.06 5 0 0 38 16 55 19 3 24.6 13 223 -26 37 15 32 39 19 41 37 12 5 39 23 18 -1.07 6 0 0 38 46 56 19 3 25.7 12 224 -27 37 45 19 39 49 57 37 41 51 39 53 35 -1.07 7 0 0 39 17 9 19 3 26.8 12 225 -28 38 15 18 40 20 25 38 11 50 40 24 3 -1.07 8 0 0 39 47 32 19 3 27.8 11 225 -28 38 45 28 40 51 2 38 41 58 40 54 42 -1.07 9 0 0 40 18 4 19 3 28.7 10 226 -29 39 15 47 41 21 49 39 12 17 41 25 29 -1.07 10 0 0 40 48 45 19 3 29.5 9 227 -30 39 46 14 41 52 44 39 42 44 41 56 25 -1.07 11 0 0 41 19 33 19 3 30.3 8 227 -30 40 16 49 42 23 45 40 13 18 42 27 27 -1.08 12 0 0 41 50 26 19 3 30.9 7 228 -31 40 47 30 42 54 53 40 43 58 42 58 35 -1.08 13 0 0 42 21 25 19 3 31.5 6 229 -31 41 18 16 43 26 5 41 14 44 43 29 48 -1.08 14 0 0 42 52 27 19 3 32.0 5 230 -32 41 49 7 43 57 20 41 45 33 44 1 4 -1.09 15 0 0 43 23 32 19 3 32.4 4 230 -33 42 20 0 44 28 37 42 16 26 44 32 22 -1.10 16 0 0 43 54 38 19 3 32.7 3 231 -33 42 50 55 44 59 55 42 47 20 45 3 40 -1.11 17 0 0 44 25 44 19 3 33.0 3 232 -34 43 21 50 45 31 13 43 18 15 45 34 59 -1.13 18 0 0 44 56 49 19 3 33.1 2 232 -34 43 52 45 46 2 29 43 49 9 46 6 16 -1.17 19 0 0 45 27 52 19 3 33.2 1 233 -35 44 23 38 46 33 43 44 20 2 46 37 31 -1.30 20 0 0 .. .. .... .. .. .. .. .. .. 44 54 29 .. .. .. 44 50 52 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 328-133848 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 15 49.3632 DE: -24 27 21.974 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 15 49.3631 DE: -24 27 21.974 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.8 * B mag [mag]: 13.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (111) Ate asteroid class: approx. diameter [km]: 133 approx. diameter ["]: 0.059 distance from Earth [AU]: 3.13440 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#126 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): 0.007", 0.002", 83.363° remarks: * orbital elements for (111)Ate : Mean anomaly = 177.5314944731 deg Arg. of pericenter = 168.3027372449 deg Long. of node = 305.6621459602 deg Inclination = 4.9318701246 deg Eccentricity = 0.1032204752 Semimajor axis = 2.5935466601 AU Perihelion dist = 2.3258395414 AU Mag: H = 8.23, G = 0.15 Epoch of elements : MJD 60604.79238037 TDT (2024 Oct 21.7924) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1262023Apr24,4.63,2024,10,21,19.017134,-0.067415,0.722131,16.236645,1.503596,0.005279,0.000110,-0.000001,0.000000 -41.6376,-24.4489,-109.13,-11.07,False UCAC4 328-133848,18.26371203,-24.4561039,13.01,11.78,11.12,0.1,0,,18.28884356,-24.4488754,2.30,2.49,0,0,0 111,Ate,13.94,133.644,3.1344,0,0,3.337,4.22,,8.0,0 0,177.3445,2024,10,21,168.3027,305.6621,4.9319,0.10322,2.59355,2.32584,8.23,5.0,0.15 1.028,0.0070,0.0017,83,0.0017,Known errors,0.75,0,-1,-1 20241021_133848,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org