IOTA/IOTA-ES occultation update for (79) Eurynome / UCAC4 366-163234 event on 2023 Sep 26, 11:09 UT Visible from Japan, China Summary ------- On 2023 Sep 26 UT, the 67.3 km diameter asteroid (79) Eurynome will occult a 12.1 mag star in the constellation Sagittarius for observers along a path across Japan, China. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.97 mag to 12.46 mag (the magnitude of the asteroid) for at most 7.080 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: 2023 Sep 26, 11:02 - 2023 Sep 26, 11:15 * geocentric midpoint of event [JD]: 2460213.96469508 * magnitude of target star: 12.06 * magnitude drop [mag]: 0.97 * estimated maximum duration [s]: 7.080 * Moon: 88 % sunlit, 37° distance * Sun: 104° distance * rough path description: Japan, China The occultation path -------------------- * approximate projected width [km]: 117 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.005, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.005", 0.001", 82°) * approx speed of asteroid's shadow [km/s]: 9.5083 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 366-163234 by 79 Eurynome on 2023 Sep 26 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 56 0 0 .. .. .... .. .. .. .. .. .. 57 45 5 .. .. .. 57 42 51 .. .. .. .... 57 0 0 58 1 27 11 2 47.1 0 124 21 57 24 6 58 39 32 57 21 52 58 41 52 .... 58 0 0 57 40 17 11 2 47.2 1 125 21 57 2 57 58 18 20 57 0 43 58 20 39 -0.78 59 0 0 57 18 57 11 2 47.6 2 126 21 56 41 39 57 56 58 56 39 25 57 59 17 -1.01 60 0 0 56 57 28 11 2 48.0 2 127 20 56 20 12 57 35 27 56 17 58 57 37 46 -1.12 61 0 0 56 35 51 11 2 48.6 3 127 20 55 58 37 57 13 47 55 56 23 57 16 6 -1.18 62 0 0 56 14 6 11 2 49.4 4 128 20 55 36 55 56 52 0 55 34 41 56 54 19 -1.22 63 0 0 55 52 14 11 2 50.4 4 129 20 55 15 6 56 30 5 55 12 52 56 32 24 -1.25 64 0 0 55 30 16 11 2 51.5 5 130 19 54 53 11 56 8 3 54 50 57 56 10 22 -1.27 65 0 0 55 8 12 11 2 52.8 6 131 19 54 31 10 55 45 56 54 28 57 55 48 14 -1.28 66 0 0 54 46 3 11 2 54.3 6 132 19 54 9 4 55 23 42 54 6 51 55 26 1 -1.30 67 0 0 54 23 49 11 2 55.9 7 132 19 53 46 54 55 1 25 53 44 41 55 3 43 -1.31 68 0 0 54 1 31 11 2 57.7 8 133 18 53 24 40 54 39 3 53 22 27 54 41 21 -1.32 69 0 0 53 39 10 11 2 59.8 8 134 18 53 2 23 54 16 38 53 0 11 54 18 55 -1.32 70 0 0 53 16 47 11 3 2.0 9 135 18 52 40 5 53 54 10 52 37 53 53 56 27 -1.33 71 0 0 52 54 23 11 3 4.4 10 136 17 52 17 44 53 31 41 52 15 33 53 33 58 -1.34 72 0 0 52 31 57 11 3 7.0 11 137 17 51 55 24 53 9 10 51 53 12 53 11 27 -1.34 73 0 0 52 9 31 11 3 9.7 11 137 16 51 33 3 52 46 39 51 30 51 52 48 56 -1.35 74 0 0 51 47 6 11 3 12.7 12 138 16 51 10 43 52 24 9 51 8 32 52 26 25 -1.35 75 0 0 51 24 42 11 3 15.9 13 139 16 50 48 24 52 1 40 50 46 13 52 3 55 -1.35 76 0 0 51 2 21 11 3 19.3 13 140 15 50 26 8 51 39 13 50 23 57 51 41 28 -1.36 77 0 0 50 40 2 11 3 22.8 14 141 15 50 3 54 51 16 48 50 1 44 51 19 3 -1.36 78 0 0 50 17 47 11 3 26.6 15 142 14 49 41 45 50 54 27 49 39 35 50 56 42 -1.36 79 0 0 49 55 36 11 3 30.6 15 142 14 49 19 40 50 32 11 49 17 30 50 34 25 -1.37 80 0 0 49 33 31 11 3 34.8 16 143 13 48 57 40 50 10 0 48 55 31 50 12 13 -1.37 81 0 0 49 11 32 11 3 39.2 17 144 13 48 35 46 49 47 54 48 33 38 49 50 7 -1.37 82 0 0 48 49 39 11 3 43.8 17 145 12 48 13 59 49 25 55 48 11 51 49 28 8 -1.37 83 0 0 48 27 54 11 3 48.5 18 146 11 47 52 20 49 4 4 47 50 12 49 6 16 -1.38 84 0 0 48 6 17 11 3 53.5 19 147 11 47 30 49 48 42 21 47 28 42 48 44 33 -1.38 85 0 0 47 44 49 11 3 58.7 20 148 10 47 9 28 48 20 46 47 7 20 48 22 58 -1.38 86 0 0 47 23 31 11 4 4.1 20 149 10 46 48 16 47 59 22 46 46 9 48 1 33 -1.38 87 0 0 47 2 24 11 4 9.7 21 150 9 46 27 15 47 38 8 46 25 8 47 40 19 -1.38 88 0 0 46 41 28 11 4 15.5 21 150 9 46 6 25 47 17 6 46 4 19 47 19 16 -1.39 89 0 0 46 20 44 11 4 21.4 22 151 8 45 45 47 46 56 15 45 43 41 46 58 25 -1.39 90 0 0 46 0 13 11 4 27.6 23 152 7 45 25 22 46 35 37 45 23 17 46 37 47 -1.39 91 0 0 45 39 55 11 4 33.9 23 153 7 45 5 10 46 15 13 45 3 5 46 17 22 -1.39 92 0 0 45 19 51 11 4 40.5 24 154 6 44 45 13 45 55 3 44 43 8 45 57 12 -1.39 93 0 0 45 0 3 11 4 47.2 25 155 5 44 25 31 45 35 8 44 23 26 45 37 17 -1.39 94 0 0 44 40 30 11 4 54.1 25 156 5 44 6 4 45 15 29 44 4 0 45 17 37 -1.40 95 0 0 44 21 13 11 5 1.1 26 157 4 43 46 53 44 56 5 43 44 50 44 58 13 -1.40 96 0 0 44 2 13 11 5 8.3 26 158 3 43 27 59 44 36 59 43 25 56 44 39 7 -1.40 97 0 0 43 43 31 11 5 15.7 27 159 2 43 9 23 44 18 11 43 7 20 44 20 18 -1.40 98 0 0 43 25 7 11 5 23.3 27 160 2 42 51 5 43 59 40 42 49 2 44 1 47 -1.40 99 0 0 43 7 2 11 5 31.0 28 161 1 42 33 5 43 41 29 42 31 3 43 43 35 -1.40 100 0 0 42 49 16 11 5 38.9 29 162 0 42 15 25 43 23 37 42 13 24 43 25 43 -1.40 101 0 0 42 31 50 11 5 46.9 29 163 -1 41 58 5 43 6 5 41 56 4 43 8 10 -1.41 102 0 0 42 14 45 11 5 55.1 30 164 -1 41 41 6 42 48 54 41 39 5 42 50 59 -1.41 103 0 0 41 58 0 11 6 3.4 30 165 -2 41 24 27 42 32 4 41 22 26 42 34 9 -1.41 104 0 0 41 41 38 11 6 11.8 30 166 -3 41 8 10 42 15 36 41 6 10 42 17 40 -1.41 105 0 0 41 25 38 11 6 20.4 31 168 -4 40 52 15 41 59 30 40 50 15 42 1 34 -1.41 106 0 0 41 10 0 11 6 29.1 31 169 -4 40 36 43 41 43 46 40 34 43 41 45 50 -1.41 107 0 0 40 54 46 11 6 37.8 32 170 -5 40 21 34 41 28 27 40 19 34 41 30 30 -1.41 108 0 0 40 39 55 11 6 46.7 32 171 -6 40 6 48 41 13 31 40 4 49 41 15 33 -1.42 109 0 0 40 25 28 11 6 55.8 32 172 -7 39 52 26 40 58 59 39 50 27 41 1 1 -1.42 110 0 0 40 11 26 11 7 4.9 33 173 -8 39 38 29 40 44 51 39 36 31 40 46 54 -1.42 111 0 0 39 57 49 11 7 14.0 33 174 -8 39 24 57 40 31 9 39 22 58 40 33 11 -1.42 112 0 0 39 44 37 11 7 23.3 33 176 -9 39 11 50 40 17 53 39 9 52 40 19 55 -1.42 113 0 0 39 31 51 11 7 32.7 34 177 -10 38 59 9 40 5 2 38 57 11 40 7 4 -1.42 114 0 0 39 19 32 11 7 42.1 34 178 -11 38 46 53 39 52 38 38 44 56 39 54 39 -1.42 115 0 0 39 7 39 11 7 51.6 34 179 -12 38 35 4 39 40 41 38 33 7 39 42 41 -1.42 116 0 0 38 56 12 11 8 1.1 34 180 -13 38 23 42 39 29 10 38 21 45 39 31 11 -1.43 117 0 0 38 45 13 11 8 10.7 34 182 -13 38 12 47 39 18 7 38 10 50 39 20 7 -1.43 118 0 0 38 34 42 11 8 20.4 35 183 -14 38 2 19 39 7 31 38 0 22 39 9 31 -1.43 119 0 0 38 24 38 11 8 30.0 35 184 -15 37 52 19 38 57 24 37 50 22 38 59 23 -1.43 120 0 0 38 15 2 11 8 39.8 35 185 -16 37 42 46 38 47 44 37 40 50 38 49 44 -1.43 121 0 0 38 5 54 11 8 49.5 35 186 -17 37 33 42 38 38 33 37 31 46 38 40 32 -1.43 122 0 0 37 57 15 11 8 59.2 35 188 -18 37 25 6 38 29 50 37 23 10 38 31 50 -1.43 123 0 0 37 49 5 11 9 9.0 35 189 -18 37 16 59 38 21 37 37 15 3 38 23 36 -1.43 124 0 0 37 41 23 11 9 18.8 35 190 -19 37 9 20 38 13 53 37 7 25 38 15 51 -1.43 125 0 0 37 34 11 11 9 28.5 35 191 -20 37 2 11 38 6 38 37 0 15 38 8 36 -1.43 126 0 0 37 27 28 11 9 38.3 35 193 -21 36 55 30 37 59 52 36 53 35 38 1 51 -1.43 127 0 0 37 21 15 11 9 48.0 35 194 -22 36 49 19 37 53 36 36 47 24 37 55 34 -1.43 128 0 0 37 15 31 11 9 57.7 35 195 -22 36 43 38 37 47 50 36 41 43 37 49 48 -1.43 129 0 0 37 10 17 11 10 7.4 34 196 -23 36 38 26 37 42 34 36 36 31 37 44 32 -1.44 130 0 0 37 5 33 11 10 17.0 34 197 -24 36 33 43 37 37 48 36 31 49 37 39 46 -1.44 131 0 0 37 1 18 11 10 26.6 34 199 -25 36 29 31 37 33 32 36 27 36 37 35 29 -1.44 132 0 0 36 57 34 11 10 36.1 34 200 -26 36 25 48 37 29 46 36 23 53 37 31 43 -1.44 133 0 0 36 54 20 11 10 45.6 34 201 -27 36 22 35 37 26 30 36 20 41 37 28 28 -1.44 134 0 0 36 51 36 11 10 55.0 33 202 -27 36 19 52 37 23 45 36 17 58 37 25 42 -1.44 135 0 0 36 49 22 11 11 4.4 33 203 -28 36 17 39 37 21 30 36 15 45 37 23 27 -1.44 136 0 0 36 47 38 11 11 13.7 33 204 -29 36 15 57 37 19 45 36 14 2 37 21 43 -1.44 137 0 0 36 46 25 11 11 22.8 32 205 -30 36 14 44 37 18 31 36 12 49 37 20 29 -1.44 138 0 0 36 45 41 11 11 31.9 32 206 -30 36 14 1 37 17 47 36 12 7 37 19 45 -1.44 139 0 0 36 45 28 11 11 41.0 32 208 -31 36 13 48 37 17 34 36 11 54 37 19 31 -1.44 140 0 0 36 45 45 11 11 49.9 31 209 -32 36 14 6 37 17 51 36 12 11 37 19 48 -1.44 141 0 0 36 46 33 11 11 58.7 31 210 -33 36 14 53 37 18 38 36 12 59 37 20 36 -1.44 142 0 0 36 47 51 11 12 7.3 31 211 -33 36 16 11 37 19 56 36 14 17 37 21 54 -1.44 143 0 0 36 49 39 11 12 15.9 30 212 -34 36 17 58 37 21 44 36 16 4 37 23 42 -1.44 144 0 0 36 51 56 11 12 24.3 30 213 -35 36 20 15 37 24 2 36 18 20 37 26 0 -1.44 145 0 0 36 54 43 11 12 32.7 29 214 -36 36 23 1 37 26 50 36 21 6 37 28 47 -1.44 146 0 0 36 57 59 11 12 40.8 29 215 -36 36 26 17 37 30 8 36 24 22 37 32 5 -1.44 147 0 0 37 1 46 11 12 48.9 28 216 -37 36 30 2 37 33 55 36 28 7 37 35 53 -1.44 148 0 0 37 6 2 11 12 56.8 28 217 -38 36 34 16 37 38 12 36 32 22 37 40 10 -1.44 149 0 0 37 10 47 11 13 4.5 27 218 -38 36 39 0 37 42 59 36 37 6 37 44 56 -1.44 150 0 0 37 16 1 11 13 12.1 26 219 -39 36 44 13 37 48 15 36 42 18 37 50 12 -1.44 151 0 0 37 21 44 11 13 19.5 26 219 -39 36 49 54 37 53 59 36 48 0 37 55 57 -1.44 152 0 0 37 27 56 11 13 26.8 25 220 -40 36 56 4 38 0 13 36 54 9 38 2 11 -1.44 153 0 0 37 34 36 11 13 33.9 25 221 -41 37 2 43 38 6 56 37 0 48 38 8 54 -1.44 154 0 0 37 41 45 11 13 40.8 24 222 -41 37 9 49 38 14 7 37 7 54 38 16 5 -1.44 155 0 0 37 49 22 11 13 47.5 23 223 -42 37 17 24 38 21 46 37 15 29 38 23 45 -1.44 156 0 0 37 57 27 11 13 54.1 23 224 -42 37 25 26 38 29 54 37 23 31 38 31 53 -1.44 157 0 0 38 5 59 11 14 0.4 22 225 -43 37 33 56 38 38 29 37 32 0 38 40 28 -1.44 158 0 0 38 14 59 11 14 6.6 21 225 -43 37 42 53 38 47 32 37 40 57 38 49 31 -1.44 159 0 0 38 24 26 11 14 12.6 21 226 -44 37 52 17 38 57 2 37 50 21 38 59 1 -1.44 160 0 0 38 34 19 11 14 18.4 20 227 -44 38 2 7 39 6 59 38 0 11 39 8 58 -1.44 161 0 0 38 44 39 11 14 24.0 19 228 -45 38 12 24 39 17 22 38 10 27 39 19 22 -1.44 162 0 0 38 55 26 11 14 29.4 18 229 -45 38 23 6 39 28 12 38 21 10 39 30 12 -1.44 162 59 59 39 6 38 11 14 34.6 18 229 -45 38 34 15 39 39 28 38 32 18 39 41 28 -1.44 163 59 59 39 18 15 11 14 39.6 17 230 -46 38 45 49 39 51 9 38 43 52 39 53 10 -1.44 164 59 59 39 30 18 11 14 44.3 16 231 -46 38 57 48 40 3 16 38 55 50 40 5 17 -1.44 165 59 59 39 42 45 11 14 48.9 16 232 -46 39 10 11 40 15 48 39 8 14 40 17 48 -1.44 166 59 59 39 55 37 11 14 53.2 15 232 -46 39 22 59 40 28 44 39 21 1 40 30 45 -1.44 167 59 59 40 8 53 11 14 57.3 14 233 -47 39 36 10 40 42 4 39 34 12 40 44 5 -1.44 168 59 59 40 22 33 11 15 1.2 13 234 -47 39 49 45 40 55 48 39 47 47 40 57 50 -1.44 169 59 59 40 36 35 11 15 4.9 13 234 -47 40 3 43 41 9 55 40 1 45 41 11 57 -1.44 170 59 59 40 51 0 11 15 8.4 12 235 -47 40 18 4 41 24 25 40 16 5 41 26 28 -1.44 171 59 59 41 5 48 11 15 11.6 11 236 -47 40 32 47 41 39 18 40 30 48 41 41 21 -1.45 172 59 59 41 20 57 11 15 14.6 10 237 -47 40 47 51 41 54 33 40 45 52 41 56 36 -1.45 173 59 59 41 36 28 11 15 17.4 9 237 -48 41 3 17 42 10 9 41 1 18 42 12 12 -1.45 174 59 59 41 52 20 11 15 20.0 9 238 -48 41 19 4 42 26 6 41 17 4 42 28 9 -1.45 175 59 59 42 8 32 11 15 22.3 8 239 -48 41 35 11 42 42 23 41 33 11 42 44 27 -1.46 176 59 59 42 25 4 11 15 24.4 7 239 -48 41 51 38 42 59 1 41 49 37 43 1 5 -1.46 177 59 59 42 41 56 11 15 26.3 6 240 -47 42 8 24 43 15 58 42 6 23 43 18 3 -1.47 178 59 59 42 59 6 11 15 28.0 6 241 -47 42 25 29 43 33 14 42 23 27 43 35 19 -1.47 179 59 59 43 16 35 11 15 29.4 5 241 -47 42 42 52 43 50 49 42 40 50 43 52 54 -1.48 -179 0 1 43 34 21 11 15 30.6 4 242 -47 43 0 33 44 8 41 42 58 31 44 10 47 -1.50 -178 0 1 43 52 25 11 15 31.6 3 243 -47 43 18 30 44 26 50 43 16 28 44 28 57 -1.52 -177 0 1 44 10 45 11 15 32.4 2 244 -47 43 36 45 44 45 17 43 34 42 44 47 23 -1.55 -176 0 1 44 29 21 11 15 32.9 2 244 -47 43 55 16 45 3 59 43 53 13 45 6 6 -1.61 -175 0 1 44 48 13 11 15 33.2 1 245 -46 44 14 2 45 22 57 44 11 58 45 25 4 -1.80 -174 0 1 45 7 20 11 15 33.3 0 246 -46 44 33 2 .. .. .. 44 30 59 .. .. .. -6.02 Uncertainty in time = +/- 1 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: UCAC4 366-163234 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 09 18.7451 DE: -16 57 24.737 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 09 18.7451 DE: -16 57 24.737 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (79) Eurynome asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.047 distance from Earth [AU]: 1.97320 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 date of fit: 2023 Aug 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): 0.005", 0.001", 82.175° remarks: * orbital elements for (79)Eurynome : Mean anomaly = 284.2682361506 deg Arg. of pericenter = 201.5960105192 deg Long. of node = 206.5228937093 deg Inclination = 4.6139040056 deg Eccentricity = 0.1908720679 Semimajor axis = 2.4440941941 AU Perihelion dist = 1.9775848812 AU Mag: H = 7.79, G = 0.25 Epoch of elements : MJD 60213.46479167 TDT (2023 Sep 26.4648) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Aug24,7.08,2023,9,26,11.152682,0.105838,0.811452,5.321510,-0.695504,0.005356,0.000532,0.000000,0.000000 115.3787,-16.9190,10.57,-1.24,False UCAC4 366-163234,19.15520699,-16.9568715,0.00,12.06,0.00,0.0,0,,19.17799444,-16.9190394,0.97,0.00,0,0,0 79,Eurynome,12.46,67.300,1.9732,0,0,1.653,-3.10,,3.4,0 0,284.1483,2023,9,26,201.5960,206.5229,4.6139,0.19087,2.44409,1.97758,7.95,5.0,0.15 1.030,0.0047,0.0007,82,0.0047,Known errors,-1.00,0,-1,-1 20230926_163234,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org