IOTA/IOTA-ES occultation update for (1225) Ariane / UCAC4 323-200870 event on 2024 Oct 15, 03:27 UT Visible from Summary ------- On 2024 Oct 15 UT, the 9.25290395335497 km diameter asteroid (1225) Ariane will occult a 11.1 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 5.86 mag to 16.94 mag (the magnitude of the asteroid) for at most 0.440 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 15, 03:23 - 2024 Oct 15, 03:31 * geocentric midpoint of event [JD]: 2460598.64408046 * magnitude of target star: 11.08 * magnitude drop [mag]: 5.86 * estimated maximum duration [s]: 0.440 * Moon: 91 % sunlit, 64° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 82°) * approx speed of asteroid's shadow [km/s]: 21.4319 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 323-200870 by 1225 Ariane on 2024 Oct 15 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 138 0 0 31 41 38 3 24 1.6 0 120 48 31 37 25 31 45 52 31 34 36 31 48 42 .... 139 0 0 31 11 47 3 24 1.6 1 121 48 31 7 35 31 16 0 31 4 47 31 18 49 -0.40 140 0 0 30 42 22 3 24 1.9 2 122 48 30 38 11 30 46 33 30 35 24 30 49 21 -0.68 141 0 0 30 13 24 3 24 2.2 3 122 48 30 9 14 30 17 34 30 6 28 30 20 21 -0.79 142 0 0 29 44 54 3 24 2.7 4 123 48 29 40 45 29 49 3 29 37 59 29 51 49 -0.84 143 0 0 29 16 52 3 24 3.2 5 123 49 29 12 44 29 20 59 29 9 59 29 23 45 -0.88 144 0 0 28 49 18 3 24 4.0 6 124 49 28 45 12 28 53 25 28 42 28 28 56 10 -0.90 145 0 0 28 22 15 3 24 4.8 7 124 48 28 18 10 28 26 21 28 15 27 28 29 5 -0.92 146 0 0 27 55 43 3 24 5.8 8 124 48 27 51 39 27 59 47 27 48 56 28 2 30 -0.93 147 0 0 27 29 42 3 24 6.9 9 125 48 27 25 39 27 33 45 27 22 57 27 36 27 -0.94 148 0 0 27 4 12 3 24 8.1 10 125 48 27 0 10 27 8 14 26 57 29 27 10 56 -0.95 149 0 0 26 39 15 3 24 9.4 11 126 48 26 35 15 26 43 16 26 32 34 26 45 58 -0.96 150 0 0 26 14 52 3 24 10.9 12 126 48 26 10 52 26 18 52 26 8 12 26 21 32 -0.96 151 0 0 25 51 1 3 24 12.5 13 127 48 25 47 3 25 55 0 25 44 23 25 57 40 -0.97 152 0 0 25 27 45 3 24 14.2 14 127 47 25 23 48 25 31 43 25 21 9 25 34 23 -0.97 153 0 0 25 5 4 3 24 16.0 15 128 47 25 1 7 25 9 1 24 58 29 25 11 40 -0.98 154 0 0 24 42 58 3 24 17.9 16 128 47 24 39 2 24 46 54 24 36 24 24 49 32 -0.98 155 0 0 24 21 27 3 24 20.0 17 129 46 24 17 32 24 25 22 24 14 55 24 27 59 -0.98 156 0 0 24 0 32 3 24 22.1 18 129 46 23 56 38 24 4 26 23 54 2 24 7 3 -0.99 157 0 0 23 40 13 3 24 24.4 19 130 45 23 36 20 23 44 7 23 33 44 23 46 43 -0.99 158 0 0 23 20 31 3 24 26.8 20 130 45 23 16 39 23 24 24 23 14 4 23 26 59 -0.99 159 0 0 23 1 26 3 24 29.3 20 131 44 22 57 35 23 5 18 22 55 0 23 7 53 -0.99 160 0 0 22 42 59 3 24 31.9 21 132 44 22 39 8 22 46 50 22 36 34 22 49 24 -1.00 161 0 0 22 25 9 3 24 34.6 22 132 43 22 21 19 22 28 59 22 18 45 22 31 33 -1.00 162 0 0 22 7 57 3 24 37.4 23 133 43 22 4 8 22 11 46 22 1 35 22 14 20 -1.00 163 0 0 21 51 23 3 24 40.3 24 133 42 21 47 35 21 55 12 21 45 2 21 57 45 -1.00 164 0 0 21 35 28 3 24 43.3 25 134 41 21 31 40 21 39 16 21 29 8 21 41 49 -1.00 165 0 0 21 20 11 3 24 46.4 26 134 41 21 16 24 21 23 59 21 13 53 21 26 31 -1.00 166 0 0 21 5 34 3 24 49.6 27 135 40 21 1 47 21 9 21 20 59 16 21 11 52 -1.01 167 0 0 20 51 35 3 24 52.9 27 136 39 20 47 49 20 55 22 20 45 19 20 57 53 -1.01 168 0 0 20 38 16 3 24 56.3 28 136 39 20 34 31 20 42 2 20 32 1 20 44 33 -1.01 169 0 0 20 25 37 3 24 59.8 29 137 38 20 21 52 20 29 22 20 19 22 20 31 53 -1.01 170 0 0 20 13 37 3 25 3.4 30 138 37 20 9 53 20 17 22 20 7 23 20 19 52 -1.01 171 0 0 20 2 17 3 25 7.0 31 138 37 19 58 33 20 6 1 19 56 4 20 8 31 -1.01 172 0 0 19 51 37 3 25 10.7 31 139 36 19 47 54 19 55 21 19 45 25 19 57 50 -1.01 173 0 0 19 41 37 3 25 14.5 32 140 35 19 37 54 19 45 21 19 35 26 19 47 50 -1.01 174 0 0 19 32 18 3 25 18.4 33 140 34 19 28 35 19 36 1 19 26 7 19 38 30 -1.02 175 0 0 19 23 39 3 25 22.4 34 141 33 19 19 56 19 27 21 19 17 28 19 29 50 -1.02 176 0 0 19 15 40 3 25 26.4 34 142 33 19 11 58 19 19 22 19 9 30 19 21 51 -1.02 177 0 0 19 8 22 3 25 30.5 35 143 32 19 4 40 19 12 4 19 2 12 19 14 32 -1.02 178 0 0 19 1 45 3 25 34.6 36 144 31 18 58 3 19 5 26 18 55 35 19 7 54 -1.02 179 0 0 18 55 48 3 25 38.9 36 144 30 18 52 7 18 59 29 18 49 39 19 1 57 -1.02 -180 0 0 18 50 32 3 25 43.2 37 145 29 18 46 51 18 54 13 18 44 24 18 56 41 -1.02 -179 0 0 18 45 57 3 25 47.5 37 146 28 18 42 17 18 49 38 18 39 49 18 52 6 -1.02 -178 0 0 18 42 3 3 25 51.9 38 147 28 18 38 23 18 45 44 18 35 56 18 48 12 -1.02 -177 0 0 18 38 50 3 25 56.4 39 148 27 18 35 10 18 42 31 18 32 43 18 44 59 -1.02 -176 0 0 18 36 19 3 26 0.9 39 149 26 18 32 38 18 39 59 18 30 11 18 42 27 -1.02 -175 0 0 18 34 28 3 26 5.5 40 150 25 18 30 48 18 38 8 18 28 21 18 40 36 -1.02 -174 0 0 18 33 18 3 26 10.1 40 151 24 18 29 38 18 36 59 18 27 11 18 39 26 -1.02 -173 0 0 18 32 50 3 26 14.8 41 152 23 18 29 10 18 36 31 18 26 43 18 38 58 -1.02 -172 0 0 18 33 3 3 26 19.5 41 153 22 18 29 23 18 36 43 18 26 56 18 39 11 -1.03 -171 0 0 18 33 57 3 26 24.3 41 154 21 18 30 17 18 37 38 18 27 50 18 40 5 -1.03 -170 0 0 18 35 33 3 26 29.1 42 155 20 18 31 52 18 39 13 18 29 25 18 41 41 -1.03 -169 0 0 18 37 49 3 26 33.9 42 157 19 18 34 9 18 41 30 18 31 42 18 43 58 -1.03 -168 0 0 18 40 47 3 26 38.8 43 158 18 18 37 7 18 44 28 18 34 39 18 46 56 -1.03 -167 0 0 18 44 26 3 26 43.7 43 159 17 18 40 46 18 48 7 18 38 18 18 50 35 -1.03 -166 0 0 18 48 47 3 26 48.6 43 160 16 18 45 6 18 52 28 18 42 38 18 54 56 -1.03 -165 0 0 18 53 49 3 26 53.5 43 161 15 18 50 7 18 57 30 18 47 40 18 59 58 -1.03 -164 0 0 18 59 31 3 26 58.5 44 163 15 18 55 50 19 3 13 18 53 22 19 5 41 -1.03 -163 0 0 19 5 56 3 27 3.5 44 164 14 19 2 14 19 9 38 18 59 46 19 12 6 -1.03 -162 0 0 19 13 1 3 27 8.5 44 165 13 19 9 19 19 16 43 19 6 50 19 19 12 -1.03 -161 0 0 19 20 47 3 27 13.6 44 166 12 19 17 5 19 24 30 19 14 36 19 26 59 -1.03 -160 0 0 19 29 14 3 27 18.6 44 168 11 19 25 32 19 32 57 19 23 3 19 35 27 -1.03 -159 0 0 19 38 23 3 27 23.7 44 169 10 19 34 40 19 42 6 19 32 11 19 44 36 -1.03 -158 0 0 19 48 12 3 27 28.7 44 170 9 19 44 28 19 51 56 19 41 59 19 54 26 -1.03 -157 0 0 19 58 42 3 27 33.8 44 171 8 19 54 58 20 2 27 19 52 28 20 4 57 -1.03 -156 0 0 20 9 53 3 27 38.9 44 173 7 20 6 8 20 13 37 20 3 38 20 16 8 -1.03 -155 0 0 20 21 44 3 27 44.0 44 174 6 20 17 59 20 25 30 20 15 29 20 28 1 -1.03 -154 0 0 20 34 16 3 27 49.0 44 175 5 20 30 31 20 38 2 20 28 0 20 40 34 -1.03 -153 0 0 20 47 29 3 27 54.1 44 177 4 20 43 42 20 51 15 20 41 11 20 53 47 -1.03 -152 0 0 21 1 21 3 27 59.1 44 178 3 20 57 34 21 5 9 20 55 3 21 7 41 -1.03 -151 0 0 21 15 54 3 28 4.2 43 179 2 21 12 6 21 19 42 21 9 34 21 22 14 -1.03 -150 0 0 21 31 7 3 28 9.2 43 180 1 21 27 18 21 34 55 21 24 46 21 37 28 -1.03 -149 0 0 21 46 59 3 28 14.2 43 182 0 21 43 10 21 50 48 21 40 37 21 53 21 -1.03 -148 0 0 22 3 31 3 28 19.2 42 183 -1 21 59 41 22 7 21 21 57 7 22 9 54 -1.03 -147 0 0 22 20 42 3 28 24.1 42 184 -2 22 16 51 22 24 32 22 14 17 22 27 7 -1.03 -146 0 0 22 38 32 3 28 29.1 42 185 -3 22 34 40 22 42 23 22 32 6 22 44 58 -1.03 -145 0 0 22 57 1 3 28 34.0 41 187 -4 22 53 8 23 0 53 22 50 34 23 3 28 -1.03 -144 0 0 23 16 8 3 28 38.8 41 188 -5 23 12 15 23 20 1 23 9 39 23 22 37 -1.03 -143 0 0 23 35 53 3 28 43.7 40 189 -6 23 32 0 23 39 47 23 29 24 23 42 24 -1.03 -142 0 0 23 56 17 3 28 48.4 40 190 -7 23 52 22 24 0 12 23 49 45 24 2 49 -1.03 -141 0 0 24 17 18 3 28 53.2 39 191 -8 24 13 22 24 21 14 24 10 45 24 23 51 -1.03 -140 0 0 24 38 56 3 28 57.9 39 192 -9 24 34 59 24 42 52 24 32 21 24 45 31 -1.03 -139 0 0 25 1 10 3 29 2.5 38 193 -10 24 57 13 25 5 8 24 54 34 25 7 47 -1.03 -138 0 0 25 24 1 3 29 7.1 38 194 -11 25 20 3 25 28 0 25 17 24 25 30 40 -1.03 -137 0 0 25 47 28 3 29 11.6 37 195 -12 25 43 29 25 51 28 25 40 49 25 54 9 -1.03 -136 0 0 26 11 31 3 29 16.1 37 196 -13 26 7 30 26 15 32 26 4 49 26 18 13 -1.03 -135 0 0 26 36 8 3 29 20.5 36 197 -14 26 32 6 26 40 10 26 29 25 26 42 52 -1.03 -134 0 0 27 1 19 3 29 24.8 35 198 -14 26 57 16 27 5 22 26 54 34 27 8 5 -1.03 -133 0 0 27 27 4 3 29 29.1 34 199 -15 27 23 0 27 31 8 27 20 18 27 33 52 -1.03 -132 0 0 27 53 22 3 29 33.3 34 200 -16 27 49 17 27 57 28 27 46 34 28 0 12 -1.03 -131 0 0 28 20 13 3 29 37.4 33 201 -17 28 16 7 28 24 20 28 13 23 28 27 5 -1.03 -130 0 0 28 47 36 3 29 41.4 32 202 -18 28 43 28 28 51 43 28 40 43 28 54 29 -1.03 -129 0 0 29 15 29 3 29 45.4 32 203 -19 29 11 21 29 19 38 29 8 35 29 22 25 -1.03 -128 0 0 29 43 53 3 29 49.2 31 204 -20 29 39 43 29 48 3 29 36 57 29 50 50 -1.03 -127 0 0 30 12 46 3 29 53.0 30 205 -21 30 8 35 30 16 58 30 5 48 30 19 46 -1.03 -126 0 0 30 42 8 3 29 56.7 29 206 -22 30 37 56 30 46 21 30 35 8 30 49 10 -1.03 -125 0 0 31 11 58 3 30 0.3 28 207 -22 31 7 45 31 16 12 31 4 56 31 19 2 -1.03 -124 0 0 31 42 15 3 30 3.8 27 207 -23 31 38 1 31 46 30 31 35 11 31 49 21 -1.03 -123 0 0 32 12 58 3 30 7.1 27 208 -24 32 8 42 32 17 15 32 5 51 32 20 6 -1.03 -122 0 0 32 44 6 3 30 10.4 26 209 -25 32 39 49 32 48 24 32 36 57 32 51 16 -1.03 -121 0 0 33 15 38 3 30 13.6 25 210 -26 33 11 20 33 19 57 33 8 27 33 22 50 -1.03 -120 0 0 33 47 33 3 30 16.7 24 210 -26 33 43 14 33 51 53 33 40 20 33 54 48 -1.03 -119 0 0 34 19 50 3 30 19.6 23 211 -27 34 15 29 34 24 12 34 12 35 34 27 7 -1.03 -118 0 0 34 52 28 3 30 22.5 22 212 -28 34 48 6 34 56 51 34 45 11 34 59 47 -1.03 -117 0 0 35 25 26 3 30 25.2 21 213 -29 35 21 2 35 29 50 35 18 6 35 32 46 -1.03 -116 0 0 35 58 42 3 30 27.8 20 213 -29 35 54 17 36 3 7 35 51 20 36 6 4 -1.03 -115 0 0 36 32 15 3 30 30.3 19 214 -30 36 27 49 36 36 42 36 24 51 36 39 40 -1.03 -114 0 0 37 6 4 3 30 32.7 19 215 -31 37 1 37 37 10 32 36 58 38 37 13 31 -1.03 -113 0 0 37 40 8 3 30 35.0 18 216 -31 37 35 39 37 44 37 37 32 40 37 47 38 -1.03 -112 0 0 38 14 26 3 30 37.1 17 216 -32 38 9 56 38 18 56 38 6 55 38 21 57 -1.03 -111 0 0 38 48 55 3 30 39.1 16 217 -33 38 44 24 38 53 27 38 41 23 38 56 29 -1.03 -110 0 0 39 23 36 3 30 41.0 15 218 -33 39 19 4 39 28 9 39 16 2 39 31 12 -1.03 -109 0 0 39 58 26 3 30 42.8 14 218 -34 39 53 52 40 3 0 39 50 50 40 6 4 -1.04 -108 0 0 40 33 24 3 30 44.5 13 219 -34 40 28 49 40 37 59 40 25 45 40 41 3 -1.04 -107 0 0 41 8 28 3 30 46.0 12 220 -35 41 3 52 41 13 5 41 0 48 41 16 10 -1.04 -106 0 0 41 43 38 3 30 47.4 11 221 -35 41 39 1 41 48 16 41 35 56 41 51 21 -1.04 -105 0 0 42 18 52 3 30 48.7 10 221 -36 42 14 13 42 23 30 42 11 7 42 26 37 -1.04 -104 0 0 42 54 7 3 30 49.9 9 222 -36 42 49 28 42 58 47 42 46 22 43 1 55 -1.04 -103 0 0 43 29 24 3 30 50.9 8 223 -37 43 24 44 43 34 5 43 21 36 43 37 13 -1.04 -102 0 0 44 4 40 3 30 51.9 7 223 -37 43 59 59 44 9 22 43 56 51 44 12 31 -1.05 -101 0 0 44 39 54 3 30 52.7 6 224 -37 44 35 12 44 44 37 44 32 3 44 47 46 -1.05 -100 0 0 45 15 5 3 30 53.4 6 225 -38 45 10 21 45 19 48 45 7 12 45 22 58 -1.06 - 99 0 0 45 50 10 3 30 54.0 5 226 -38 45 45 26 45 54 55 45 42 16 45 58 5 -1.06 - 98 0 0 46 25 9 3 30 54.4 4 226 -38 46 20 24 46 29 55 46 17 14 46 33 6 -1.07 - 97 0 0 47 0 1 3 30 54.8 3 227 -38 46 55 15 47 4 47 46 52 4 47 7 59 -1.09 - 96 0 0 47 34 43 3 30 55.1 2 228 -39 47 29 56 47 39 30 47 26 45 47 42 42 -1.12 - 95 0 0 48 9 15 3 30 55.2 1 229 -39 48 4 27 48 14 2 48 1 16 48 17 15 -1.20 - 94 0 0 48 43 35 3 30 55.3 0 229 -39 48 38 47 48 48 23 48 35 34 48 51 36 -2.31 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 323-200870 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 01 56.1698 DE: -25 32 39.992 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 01 56.1698 DE: -25 32 39.993 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1225) Ariane asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.31770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.009", 0.002", 82.425° remarks: * orbital elements for (1225)Ariane : Mean anomaly = 196.8817207832 deg Arg. of pericenter = 101.3956509206 deg Long. of node = 12.3210372519 deg Inclination = 3.0740158429 deg Eccentricity = 0.0742302091 Semimajor axis = 2.2331819934 AU Perihelion dist = 2.0674124271 AU Mag: H = 12.09, G = 0.15 Epoch of elements : MJD 60598.14408029 TDT (2024 Oct 15.1441) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,0.44,2024,10,15,3.457931,-0.128920,0.705293,11.900447,2.170420,0.005504,0.000563,0.000000,0.000000 -150.1657,-25.5102,124.57,-8.67,False UCAC4 323-200870,19.03226943,-25.5444423,11.88,11.08,10.65,0.1,0,,19.05757805,-25.5101780,5.87,5.85,0,0,0 1225,Ariane,16.94,9.421,2.3177,0,0,3.336,8.24,,0.8,0 0,196.8392,2024,10,15,101.3957,12.3210,3.0740,0.07423,2.23318,2.06741,12.09,5.0,0.15 1.334,0.0093,0.0018,82,0.0019,Known errors,0.90,0,-1,-1 20241015_200870,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org