IOTA/IOTA-ES occultation update for (396) Aeolia / UCAC4 343-091154 event on 2024 Sep 21, 02:37 UT Visible from Summary ------- On 2024 Sep 21 UT, the 38.827652730232 km diameter asteroid (396) Aeolia will occult a 11.6 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 3.27 mag to 14.86 mag (the magnitude of the asteroid) for at most 1.540 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 Sep 21, 02:34 - 2024 Sep 21, 02:40 * geocentric midpoint of event [JD]: 2460574.60926112 * magnitude of target star: 11.64 * magnitude drop [mag]: 3.27 * estimated maximum duration [s]: 1.540 * Moon: 87 % sunlit, 143° distance * Sun: 79° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 93°) * approx speed of asteroid's shadow [km/s]: 25.3337 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 343-091154 by 396 Aeolia on 2024 Sep 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 148 0 0 41 8 48 2 34 8.6 0 119 49 40 53 3 41 24 37 40 50 16 .. .. .. .... 149 0 0 40 43 30 2 34 8.6 1 120 49 40 27 46 40 59 19 40 24 59 41 2 7 -0.27 150 0 0 40 18 8 2 34 8.7 2 120 49 40 2 24 40 33 56 39 59 37 40 36 44 -0.54 151 0 0 39 52 42 2 34 8.9 3 121 49 39 36 59 40 8 29 39 34 12 40 11 17 -0.63 152 0 0 39 27 12 2 34 9.2 4 122 50 39 11 30 39 42 58 39 8 44 39 45 46 -0.68 153 0 0 39 1 40 2 34 9.6 5 122 50 38 45 59 39 17 25 38 43 13 39 20 13 -0.71 154 0 0 38 36 7 2 34 10.0 5 123 50 38 20 27 38 51 51 38 17 41 38 54 38 -0.73 155 0 0 38 10 32 2 34 10.5 6 124 50 37 54 53 38 26 15 37 52 7 38 29 2 -0.75 156 0 0 37 44 57 2 34 11.1 7 124 50 37 29 19 38 0 39 37 26 34 38 3 26 -0.76 157 0 0 37 19 22 2 34 11.8 8 125 50 37 3 46 37 35 3 37 1 1 37 37 50 -0.77 158 0 0 36 53 49 2 34 12.6 9 125 50 36 38 14 37 9 28 36 35 29 37 12 15 -0.78 159 0 0 36 28 18 2 34 13.4 10 126 50 36 12 44 36 43 56 36 10 0 36 46 42 -0.78 160 0 0 36 2 50 2 34 14.4 11 127 50 35 47 18 36 18 26 35 44 33 36 21 12 -0.79 161 0 0 35 37 25 2 34 15.4 12 127 50 35 21 54 35 53 0 35 19 10 35 55 46 -0.79 162 0 0 35 12 5 2 34 16.5 13 128 50 34 56 36 35 27 38 34 53 51 35 30 23 -0.80 163 0 0 34 46 49 2 34 17.7 14 129 50 34 31 22 35 2 21 34 28 38 35 5 6 -0.80 164 0 0 34 21 40 2 34 19.0 14 129 49 34 6 14 34 37 10 34 3 31 34 39 55 -0.80 165 0 0 33 56 37 2 34 20.4 15 130 49 33 41 13 34 12 5 33 38 30 34 14 50 -0.80 166 0 0 33 31 42 2 34 21.8 16 130 49 33 16 20 33 47 8 33 13 37 33 49 53 -0.81 167 0 0 33 6 55 2 34 23.4 17 131 49 32 51 34 33 22 19 32 48 52 33 25 4 -0.81 168 0 0 32 42 17 2 34 25.0 18 132 48 32 26 58 32 57 39 32 24 16 33 0 23 -0.81 169 0 0 32 17 48 2 34 26.7 19 132 48 32 2 32 32 33 9 31 59 50 32 35 53 -0.81 170 0 0 31 53 30 2 34 28.5 20 133 48 31 38 16 32 8 49 31 35 34 32 11 32 -0.81 171 0 0 31 29 24 2 34 30.4 21 134 47 31 14 11 31 44 40 31 11 29 31 47 23 -0.82 172 0 0 31 5 29 2 34 32.4 22 134 47 30 50 18 31 20 43 30 47 37 31 23 26 -0.82 173 0 0 30 41 46 2 34 34.4 23 135 46 30 26 37 30 56 59 30 23 57 30 59 41 -0.82 174 0 0 30 18 17 2 34 36.6 23 135 46 30 3 10 30 33 28 30 0 30 30 36 10 -0.82 175 0 0 29 55 2 2 34 38.8 24 136 45 29 39 57 30 10 11 29 37 17 30 12 52 -0.82 176 0 0 29 32 2 2 34 41.1 25 137 45 29 16 59 29 47 8 29 14 19 29 49 49 -0.82 177 0 0 29 9 16 2 34 43.5 26 138 44 28 54 15 29 24 21 28 51 36 29 27 1 -0.82 178 0 0 28 46 47 2 34 46.0 27 138 44 28 31 48 29 1 50 28 29 10 29 4 30 -0.82 179 0 0 28 24 35 2 34 48.5 28 139 43 28 9 38 28 39 35 28 6 59 28 42 15 -0.83 -180 0 0 28 2 39 2 34 51.1 29 140 43 27 47 44 28 17 37 27 45 6 28 20 17 -0.83 -179 0 0 27 41 2 2 34 53.8 30 140 42 27 26 9 27 55 58 27 23 31 27 58 37 -0.83 -178 0 0 27 19 42 2 34 56.6 30 141 41 27 4 52 27 34 36 27 2 15 27 37 15 -0.83 -177 0 0 26 58 42 2 34 59.4 31 142 41 26 43 54 27 13 34 26 41 17 27 16 12 -0.83 -176 0 0 26 38 2 2 35 2.4 32 143 40 26 23 15 26 52 51 26 20 39 26 55 29 -0.83 -175 0 0 26 17 41 2 35 5.3 33 143 39 26 2 57 26 32 29 26 0 20 26 35 7 -0.83 -174 0 0 25 57 41 2 35 8.4 34 144 39 25 42 59 26 12 27 25 40 23 26 15 4 -0.83 -173 0 0 25 38 2 2 35 11.5 34 145 38 25 23 22 25 52 46 25 20 47 25 55 23 -0.83 -172 0 0 25 18 45 2 35 14.7 35 146 37 25 4 7 25 33 27 25 1 32 25 36 3 -0.83 -171 0 0 24 59 50 2 35 18.0 36 147 36 24 45 14 25 14 30 24 42 39 25 17 6 -0.83 -170 0 0 24 41 18 2 35 21.3 37 148 36 24 26 44 24 55 56 24 24 9 24 58 31 -0.83 -169 0 0 24 23 9 2 35 24.7 37 148 35 24 8 36 24 37 44 24 6 2 24 40 20 -0.83 -168 0 0 24 5 23 2 35 28.1 38 149 34 23 50 52 24 19 57 23 48 19 24 22 32 -0.84 -167 0 0 23 48 1 2 35 31.6 39 150 33 23 33 32 24 2 33 23 30 59 24 5 7 -0.84 -166 0 0 23 31 3 2 35 35.1 40 151 32 23 16 37 23 45 33 23 14 3 23 48 8 -0.84 -165 0 0 23 14 30 2 35 38.7 40 152 31 23 0 5 23 28 58 22 57 33 23 31 33 -0.84 -164 0 0 22 58 22 2 35 42.4 41 153 31 22 43 59 23 12 49 22 41 27 23 15 23 -0.84 -163 0 0 22 42 40 2 35 46.1 42 154 30 22 28 19 22 57 5 22 25 46 22 59 38 -0.84 -162 0 0 22 27 23 2 35 49.8 42 155 29 22 13 4 22 41 46 22 10 32 22 44 19 -0.84 -161 0 0 22 12 33 2 35 53.6 43 156 28 21 58 15 22 26 54 21 55 43 22 29 27 -0.84 -160 0 0 21 58 9 2 35 57.4 43 157 27 21 43 52 22 12 28 21 41 21 22 15 1 -0.84 -159 0 0 21 44 11 2 36 1.3 44 159 26 21 29 57 21 58 29 21 27 26 22 1 1 -0.84 -158 0 0 21 30 41 2 36 5.2 45 160 25 21 16 28 21 44 57 21 13 57 21 47 29 -0.84 -157 0 0 21 17 38 2 36 9.2 45 161 25 21 3 26 21 31 52 21 0 55 21 34 24 -0.84 -156 0 0 21 5 2 2 36 13.1 46 162 24 20 50 52 21 19 15 20 48 21 21 21 47 -0.84 -155 0 0 20 52 54 2 36 17.1 46 163 23 20 38 45 21 7 6 20 36 15 21 9 37 -0.84 -154 0 0 20 41 15 2 36 21.2 47 165 22 20 27 7 20 55 25 20 24 37 20 57 56 -0.84 -153 0 0 20 30 3 2 36 25.3 47 166 21 20 15 57 20 44 12 20 13 27 20 46 43 -0.84 -152 0 0 20 19 20 2 36 29.4 47 167 20 20 5 15 20 33 28 20 2 46 20 35 58 -0.84 -151 0 0 20 9 5 2 36 33.5 48 169 19 19 55 2 20 23 12 19 52 33 20 25 42 -0.84 -150 0 0 19 59 20 2 36 37.6 48 170 18 19 45 17 20 13 25 19 42 48 20 15 55 -0.84 -149 0 0 19 50 3 2 36 41.8 48 171 17 19 36 2 20 4 7 19 33 33 20 6 37 -0.85 -148 0 0 19 41 15 2 36 46.0 49 173 16 19 27 15 19 55 19 19 24 46 19 57 48 -0.85 -147 0 0 19 32 57 2 36 50.2 49 174 15 19 18 58 19 46 59 19 16 29 19 49 29 -0.85 -146 0 0 19 25 8 2 36 54.4 49 176 14 19 11 10 19 39 10 19 8 42 19 41 39 -0.85 -145 0 0 19 17 49 2 36 58.6 49 177 13 19 3 52 19 31 49 19 1 24 19 34 19 -0.85 -144 0 0 19 11 0 2 37 2.8 49 178 12 18 57 3 19 24 59 18 54 35 19 27 28 -0.85 -143 0 0 19 4 40 2 37 7.1 50 180 11 18 50 44 19 18 39 18 48 16 19 21 7 -0.85 -142 0 0 18 58 50 2 37 11.3 50 181 11 18 44 55 19 12 48 18 42 27 19 15 17 -0.85 -141 0 0 18 53 30 2 37 15.5 50 183 10 18 39 36 19 7 28 18 37 8 19 9 56 -0.85 -140 0 0 18 48 41 2 37 19.8 50 184 9 18 34 47 19 2 37 18 32 19 19 5 6 -0.85 -139 0 0 18 44 21 2 37 24.0 50 186 8 18 30 28 18 58 17 18 28 0 19 0 46 -0.85 -138 0 0 18 40 32 2 37 28.3 50 187 7 18 26 39 18 54 27 18 24 12 18 56 56 -0.85 -137 0 0 18 37 13 2 37 32.5 50 189 6 18 23 20 18 51 8 18 20 53 18 53 36 -0.85 -136 0 0 18 34 24 2 37 36.8 49 190 5 18 20 32 18 48 19 18 18 5 18 50 47 -0.85 -135 0 0 18 32 6 2 37 41.0 49 192 4 18 18 14 18 46 0 18 15 47 18 48 29 -0.85 -134 0 0 18 30 18 2 37 45.2 49 193 3 18 16 26 18 44 12 18 13 59 18 46 40 -0.85 -133 0 0 18 29 0 2 37 49.4 49 194 2 18 15 9 18 42 55 18 12 42 18 45 23 -0.85 -132 0 0 18 28 13 2 37 53.6 49 196 1 18 14 22 18 42 7 18 11 55 18 44 35 -0.85 -131 0 0 18 27 57 2 37 57.7 48 197 0 18 14 5 18 41 51 18 11 38 18 44 19 -0.85 -130 0 0 18 28 10 2 38 1.9 48 199 -1 18 14 19 18 42 4 18 11 52 18 44 32 -0.85 -129 0 0 18 28 55 2 38 6.0 48 200 -2 18 15 3 18 42 49 18 12 36 18 45 17 -0.85 -128 0 0 18 30 9 2 38 10.1 47 201 -3 18 16 18 18 44 4 18 13 51 18 46 32 -0.85 -127 0 0 18 31 54 2 38 14.2 47 202 -4 18 18 3 18 45 49 18 15 36 18 48 17 -0.85 -126 0 0 18 34 10 2 38 18.3 47 204 -5 18 20 18 18 48 4 18 17 51 18 50 32 -0.85 -125 0 0 18 36 55 2 38 22.3 46 205 -6 18 23 3 18 50 50 18 20 36 18 53 18 -0.85 -124 0 0 18 40 11 2 38 26.3 46 206 -7 18 26 18 18 54 7 18 23 51 18 56 35 -0.85 -123 0 0 18 43 57 2 38 30.3 45 207 -8 18 30 4 18 57 53 18 27 37 19 0 21 -0.85 -122 0 0 18 48 13 2 38 34.2 45 208 -9 18 34 20 19 2 10 18 31 52 19 4 38 -0.85 -121 0 0 18 53 0 2 38 38.1 44 210 -10 18 39 5 19 6 57 18 36 38 19 9 25 -0.85 -120 0 0 18 58 16 2 38 41.9 44 211 -11 18 44 21 19 12 13 18 41 53 19 14 42 -0.85 -119 0 0 19 4 2 2 38 45.8 43 212 -12 18 50 6 19 18 0 18 47 39 19 20 29 -0.85 -118 0 0 19 10 18 2 38 49.5 42 213 -13 18 56 21 19 24 17 18 53 54 19 26 45 -0.85 -117 0 0 19 17 3 2 38 53.3 42 214 -13 19 3 6 19 31 3 19 0 38 19 33 32 -0.85 -116 0 0 19 24 18 2 38 57.0 41 215 -14 19 10 20 19 38 19 19 7 52 19 40 48 -0.85 -115 0 0 19 32 2 2 39 0.6 41 216 -15 19 18 4 19 46 4 19 15 35 19 48 33 -0.85 -114 0 0 19 40 16 2 39 4.2 40 217 -16 19 26 16 19 54 18 19 23 48 19 56 48 -0.85 -113 0 0 19 48 59 2 39 7.7 39 217 -17 19 34 58 20 3 2 19 32 29 20 5 32 -0.85 -112 0 0 19 58 10 2 39 11.2 38 218 -18 19 44 8 20 12 15 19 41 40 20 14 45 -0.85 -111 0 0 20 7 51 2 39 14.7 38 219 -19 19 53 48 20 21 56 19 51 19 20 24 26 -0.85 -110 0 0 20 17 59 2 39 18.1 37 220 -20 20 3 55 20 32 6 20 1 26 20 34 37 -0.85 -109 0 0 20 28 37 2 39 21.4 36 221 -21 20 14 32 20 42 45 20 12 2 20 45 16 -0.85 -108 0 0 20 39 42 2 39 24.6 35 222 -22 20 25 36 20 53 52 20 23 6 20 56 23 -0.85 -107 0 0 20 51 16 2 39 27.8 35 222 -23 20 37 8 21 5 27 20 34 38 21 7 58 -0.85 -106 0 0 21 3 17 2 39 31.0 34 223 -24 20 49 8 21 17 29 20 46 38 21 20 1 -0.85 -105 0 0 21 15 46 2 39 34.1 33 224 -24 21 1 35 21 30 0 20 59 5 21 32 31 -0.85 -104 0 0 21 28 42 2 39 37.1 32 225 -25 21 14 30 21 42 57 21 11 59 21 45 29 -0.85 -103 0 0 21 42 5 2 39 40.0 31 225 -26 21 27 51 21 56 22 21 25 20 21 58 54 -0.85 -102 0 0 21 55 55 2 39 42.9 31 226 -27 21 41 39 22 10 13 21 39 8 22 12 45 -0.85 -101 0 0 22 10 11 2 39 45.7 30 227 -28 21 55 54 22 24 31 21 53 23 22 27 3 -0.85 -100 0 0 22 24 53 2 39 48.4 29 227 -29 22 10 35 22 39 15 22 8 3 22 41 48 -0.85 - 99 0 0 22 40 1 2 39 51.1 28 228 -30 22 25 41 22 54 25 22 23 9 22 56 58 -0.85 - 98 0 0 22 55 35 2 39 53.7 27 228 -31 22 41 13 23 10 0 22 38 41 23 12 34 -0.85 - 97 0 0 23 11 34 2 39 56.2 26 229 -31 22 57 11 23 26 1 22 54 38 23 28 35 -0.85 - 96 0 0 23 27 58 2 39 58.6 25 230 -32 23 13 33 23 42 26 23 11 0 23 45 1 -0.85 - 95 0 0 23 44 46 2 40 1.0 25 230 -33 23 30 19 23 59 16 23 27 46 24 1 51 -0.85 - 94 0 0 24 1 58 2 40 3.3 24 231 -34 23 47 29 24 16 30 23 44 55 24 19 5 -0.85 - 93 0 0 24 19 34 2 40 5.5 23 231 -35 24 5 3 24 34 8 24 2 29 24 36 43 -0.85 - 92 0 0 24 37 32 2 40 7.6 22 232 -35 24 23 0 24 52 8 24 20 25 24 54 44 -0.85 - 91 0 0 24 55 54 2 40 9.6 21 232 -36 24 41 19 25 10 32 24 38 45 25 13 8 -0.85 - 90 0 0 25 14 38 2 40 11.6 20 233 -37 25 0 1 25 29 18 24 57 27 25 31 54 -0.85 - 89 0 0 25 33 44 2 40 13.4 19 234 -38 25 19 5 25 48 26 25 16 30 25 51 2 -0.85 - 88 0 0 25 53 11 2 40 15.2 18 234 -38 25 38 31 26 7 55 25 35 55 26 10 32 -0.85 - 87 0 0 26 12 59 2 40 16.9 17 235 -39 25 58 17 26 27 45 25 55 41 26 30 23 -0.85 - 86 0 0 26 33 8 2 40 18.5 16 235 -40 26 18 23 26 47 56 26 15 47 26 50 34 -0.86 - 85 0 0 26 53 37 2 40 20.0 15 236 -40 26 38 50 27 8 27 26 36 13 27 11 5 -0.86 - 84 0 0 27 14 24 2 40 21.4 15 236 -41 26 59 36 27 29 17 26 56 59 27 31 55 -0.86 - 83 0 0 27 35 31 2 40 22.8 14 237 -42 27 20 40 27 50 25 27 18 3 27 53 4 -0.86 - 82 0 0 27 56 56 2 40 24.0 13 237 -42 27 42 3 28 11 52 27 39 26 28 14 32 -0.86 - 81 0 0 28 18 39 2 40 25.2 12 238 -43 28 3 44 28 33 37 28 1 6 28 36 17 -0.86 - 80 0 0 28 40 39 2 40 26.2 11 238 -43 28 25 42 28 55 39 28 23 3 28 58 19 -0.86 - 79 0 0 29 2 55 2 40 27.2 10 239 -44 28 47 56 29 17 57 28 45 17 29 20 38 -0.86 - 78 0 0 29 25 27 2 40 28.1 9 239 -44 29 10 26 29 40 32 29 7 47 29 43 12 -0.87 - 77 0 0 29 48 15 2 40 28.9 8 240 -45 29 33 12 30 3 21 29 30 32 30 6 2 -0.87 - 76 0 0 30 11 17 2 40 29.6 7 240 -45 29 56 12 30 26 25 29 53 32 30 29 7 -0.87 - 75 0 0 30 34 33 2 40 30.2 6 241 -46 30 19 26 30 49 43 30 16 45 30 52 25 -0.88 - 74 0 0 30 58 2 2 40 30.7 5 241 -46 30 42 53 31 13 14 30 40 12 31 15 56 -0.88 - 73 0 0 31 21 44 2 40 31.2 4 242 -47 31 6 33 31 36 58 31 3 52 31 39 41 -0.89 - 72 0 0 31 45 37 2 40 31.5 3 242 -47 31 30 24 32 0 54 31 27 43 32 3 37 -0.90 - 71 0 0 32 9 42 2 40 31.8 2 243 -47 31 54 27 32 25 1 31 51 46 32 27 44 -0.93 - 70 0 0 32 33 57 2 40 31.9 1 243 -48 32 18 41 32 49 18 32 15 59 32 52 1 -0.99 - 69 0 0 32 58 23 2 40 32.0 0 244 -48 32 43 4 33 13 45 32 40 22 33 16 29 -1.35 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 343-091154 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 05 49.0746 DE: -21 26 55.815 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 05 49.0746 DE: -21 26 55.815 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.6 * B mag [mag]: 12.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (396) Aeolia asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.023 distance from Earth [AU]: 2.27980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.014", 0.002", 93.053° remarks: * orbital elements for (396)Aeolia : Mean anomaly = 8.2981004232 deg Arg. of pericenter = 21.2545307439 deg Long. of node = 249.8655510391 deg Inclination = 2.5493670655 deg Eccentricity = 0.1593969342 Semimajor axis = 2.7420568929 AU Perihelion dist = 2.3049814307 AU Mag: H = 10.10, G = 0.15 Epoch of elements : MJD 60574.10926096 TDT (2024 Sep 21.1093) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.54,2024,9,21,2.622267,0.050708,0.644342,14.254511,-1.127618,0.005346,-0.000465,0.000000,0.000000 -142.9829,-21.4829,138.93,0.55,False UCAC4 343-091154,17.09696521,-21.4488375,12.45,11.64,11.20,0.1,0,,17.12144797,-21.4829459,3.27,3.26,0,0,0 396,Aeolia,14.86,38.993,2.2798,0,0,3.940,-4.35,,2.4,0 0,8.2744,2024,9,21,21.2545,249.8656,2.5494,0.15940,2.74206,2.30498,10.09,5.0,0.15 1.089,0.0143,0.0021,93,0.0021,Known errors,0.80,0,-1,-1 20240921_091154,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org