IOTA/IOTA-ES occultation update for (56) Melete / UCAC4 367-115392 event on 2024 Oct 25, 14:21 UT Visible from Summary ------- On 2024 Oct 25 UT, the 111.04 km diameter asteroid (56) Melete will occult a 11.4 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 1.80 mag to 12.97 mag (the magnitude of the asteroid) for at most 3.010 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 25, 14:19 - 2024 Oct 25, 14:22 * geocentric midpoint of event [JD]: 2460609.09797138 * magnitude of target star: 11.40 * magnitude drop [mag]: 1.80 * estimated maximum duration [s]: 3.010 * Moon: 38 % sunlit, 135° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 220 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 88°) * approx speed of asteroid's shadow [km/s]: 36.8807 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 367-115392 by 56 Melete on 2024 Oct 25 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 - 38 0 0 .. .. .... .. .. .. .. .. .. 57 50 7 .. .. .. 57 45 50 .. .. .. .... - 37 0 0 58 39 45 14 19 38.3 0 124 19 57 29 36 .. .. .. 57 25 19 .. .. .. .... - 36 0 0 58 19 2 14 19 38.3 1 125 19 57 9 4 59 32 4 57 4 47 59 36 45 -0.91 - 35 0 0 57 58 18 14 19 38.4 2 126 20 56 48 31 59 11 8 56 44 15 59 15 47 -1.22 - 34 0 0 57 37 33 14 19 38.5 2 126 20 56 27 57 58 50 10 56 23 42 58 54 49 -1.36 - 33 0 0 57 16 49 14 19 38.7 3 127 20 56 7 25 58 29 13 56 3 11 58 33 51 -1.44 - 32 0 0 56 56 6 14 19 38.9 4 128 21 55 46 54 58 8 17 55 42 40 58 12 54 -1.49 - 31 0 0 56 35 25 14 19 39.2 4 129 21 55 26 25 57 47 22 55 22 12 57 51 58 -1.52 - 30 0 0 56 14 47 14 19 39.5 5 130 21 55 5 59 57 26 29 55 1 47 57 31 4 -1.55 - 29 0 0 55 54 12 14 19 39.8 6 131 21 54 45 36 57 5 40 54 41 25 57 10 14 -1.57 - 28 0 0 55 33 40 14 19 40.2 6 132 22 54 25 18 56 44 54 54 21 7 56 49 27 -1.59 - 27 0 0 55 13 13 14 19 40.7 7 132 22 54 5 4 56 24 13 54 0 54 56 28 45 -1.60 - 26 0 0 54 52 52 14 19 41.2 7 133 22 53 44 56 56 3 36 53 40 47 56 8 7 -1.61 - 25 0 0 54 32 37 14 19 41.7 8 134 22 53 24 54 55 43 6 53 20 45 55 47 36 -1.62 - 24 0 0 54 12 28 14 19 42.3 9 135 22 53 4 59 55 22 42 53 0 51 55 27 11 -1.63 - 23 0 0 53 52 27 14 19 43.0 9 136 22 52 45 11 55 2 26 52 41 4 55 6 54 -1.63 - 22 0 0 53 32 34 14 19 43.6 10 137 23 52 25 32 54 42 18 52 21 26 54 46 45 -1.64 - 21 0 0 53 12 50 14 19 44.4 11 137 23 52 6 1 54 22 18 52 1 56 54 26 44 -1.65 - 20 0 0 52 53 16 14 19 45.2 11 138 23 51 46 40 54 2 28 51 42 36 54 6 53 -1.65 - 19 0 0 52 33 51 14 19 46.0 12 139 23 51 27 30 53 42 48 51 23 26 53 47 12 -1.65 - 18 0 0 52 14 38 14 19 46.9 13 140 23 51 8 30 53 23 19 51 4 27 53 27 42 -1.66 - 17 0 0 51 55 36 14 19 47.8 13 141 23 50 49 42 53 4 2 50 45 39 53 8 24 -1.66 - 16 0 0 51 36 46 14 19 48.8 14 142 23 50 31 5 52 44 57 50 27 4 52 49 18 -1.67 - 15 0 0 51 18 8 14 19 49.8 15 143 23 50 12 41 52 26 4 50 8 41 52 30 24 -1.67 - 14 0 0 50 59 44 14 19 50.9 15 143 23 49 54 31 52 7 25 49 50 31 52 11 44 -1.67 - 13 0 0 50 41 35 14 19 52.0 16 144 23 49 36 35 51 49 0 49 32 36 51 53 18 -1.67 - 12 0 0 50 23 39 14 19 53.2 16 145 23 49 18 52 51 30 50 49 14 54 51 35 7 -1.68 - 11 0 0 50 5 59 14 19 54.4 17 146 23 49 1 25 51 12 55 48 57 28 51 17 11 -1.68 - 10 0 0 49 48 34 14 19 55.7 18 147 23 48 44 14 50 55 16 48 40 17 50 59 31 -1.68 - 9 0 0 49 31 26 14 19 57.0 18 148 23 48 27 18 50 37 53 48 23 23 50 42 7 -1.68 - 8 0 0 49 14 34 14 19 58.4 19 149 23 48 10 40 50 20 48 48 6 45 50 25 1 -1.69 - 7 0 0 48 58 0 14 19 59.8 19 150 23 47 54 18 50 4 0 47 50 24 50 8 12 -1.69 - 6 0 0 48 41 44 14 20 1.2 20 151 22 47 38 14 49 47 29 47 34 20 49 51 41 -1.69 - 5 0 0 48 25 46 14 20 2.7 20 151 22 47 22 28 49 31 18 47 18 35 49 35 28 -1.69 - 4 0 0 48 10 6 14 20 4.3 21 152 22 47 7 1 49 15 25 47 3 8 49 19 35 -1.69 - 3 0 0 47 54 46 14 20 5.8 22 153 22 46 51 52 48 59 52 46 48 1 49 4 1 -1.69 - 2 0 0 47 39 46 14 20 7.4 22 154 22 46 37 3 48 44 39 46 33 13 48 48 47 -1.70 - 1 0 0 47 25 6 14 20 9.1 23 155 21 46 22 35 48 29 46 46 18 44 48 33 53 -1.70 0 0 0 47 10 46 14 20 10.8 23 156 21 46 8 26 48 15 14 46 4 36 48 19 20 -1.70 1 0 0 46 56 48 14 20 12.5 24 157 21 45 54 38 48 1 4 45 50 49 48 5 9 -1.70 2 0 0 46 43 10 14 20 14.3 24 158 21 45 41 11 47 47 15 45 37 23 47 51 19 -1.70 3 0 0 46 29 55 14 20 16.1 25 159 20 45 28 6 47 33 48 45 24 18 47 37 52 -1.70 4 0 0 46 17 1 14 20 17.9 25 160 20 45 15 22 47 20 44 45 11 35 47 24 46 -1.70 5 0 0 46 4 30 14 20 19.8 25 161 19 45 3 1 47 8 2 44 59 15 47 12 4 -1.70 6 0 0 45 52 22 14 20 21.7 26 162 19 44 51 3 46 55 43 44 47 17 46 59 45 -1.71 7 0 0 45 40 37 14 20 23.6 26 163 19 44 39 27 46 43 48 44 35 42 46 47 49 -1.71 8 0 0 45 29 16 14 20 25.6 27 164 18 44 28 15 46 32 17 44 24 30 46 36 18 -1.71 9 0 0 45 18 19 14 20 27.5 27 165 18 44 17 26 46 21 10 44 13 42 46 25 10 -1.71 10 0 0 45 7 46 14 20 29.5 27 166 17 44 7 1 46 10 28 44 3 17 46 14 27 -1.71 11 0 0 44 57 37 14 20 31.6 28 167 17 43 57 0 46 0 10 43 53 16 46 4 8 -1.71 12 0 0 44 47 52 14 20 33.6 28 168 17 43 47 23 45 50 17 43 43 40 45 54 15 -1.71 13 0 0 44 38 32 14 20 35.7 28 169 16 43 38 10 45 40 50 43 34 28 45 44 47 -1.71 14 0 0 44 29 38 14 20 37.8 28 171 16 43 29 23 45 31 48 43 25 41 45 35 45 -1.71 15 0 0 44 21 9 14 20 39.9 29 172 15 43 21 0 45 23 11 43 17 19 45 27 8 -1.71 16 0 0 44 13 5 14 20 42.1 29 173 15 43 13 3 45 15 1 43 9 22 45 18 57 -1.72 17 0 0 44 5 27 14 20 44.2 29 174 14 43 5 31 45 7 16 43 1 50 45 11 12 -1.72 18 0 0 43 58 15 14 20 46.4 29 175 13 42 58 25 44 59 58 42 54 44 45 3 53 -1.72 19 0 0 43 51 29 14 20 48.6 30 176 13 42 51 44 44 53 6 42 48 4 44 57 1 -1.72 20 0 0 43 45 10 14 20 50.7 30 177 12 42 45 30 44 46 41 42 41 50 44 50 36 -1.72 21 0 0 43 39 17 14 20 52.9 30 178 12 42 39 41 44 40 43 42 36 1 44 44 37 -1.72 22 0 0 43 33 50 14 20 55.2 30 179 11 42 34 19 44 35 12 42 30 39 44 39 6 -1.72 23 0 0 43 28 50 14 20 57.4 30 180 11 42 29 23 44 30 8 42 25 44 44 34 1 -1.72 24 0 0 43 24 17 14 20 59.6 30 182 10 42 24 53 44 25 31 42 21 14 44 29 24 -1.72 25 0 0 43 20 11 14 21 1.8 30 183 9 42 20 50 44 21 21 42 17 12 44 25 14 -1.72 26 0 0 43 16 32 14 21 4.0 30 184 9 42 17 14 44 17 39 42 13 36 44 21 32 -1.72 27 0 0 43 13 20 14 21 6.3 30 185 8 42 14 5 44 14 24 42 10 26 44 18 17 -1.72 28 0 0 43 10 35 14 21 8.5 30 186 7 42 11 22 44 11 37 42 7 44 44 15 29 -1.72 29 0 0 43 8 18 14 21 10.7 30 187 7 42 9 7 44 9 17 42 5 28 44 13 10 -1.72 30 0 0 43 6 27 14 21 12.9 30 188 6 42 7 18 44 7 25 42 3 40 44 11 18 -1.73 31 0 0 43 5 4 14 21 15.2 30 189 5 42 5 56 44 6 1 42 2 18 44 9 53 -1.73 32 0 0 43 4 9 14 21 17.4 30 191 5 42 5 1 44 5 5 42 1 23 44 8 57 -1.73 33 0 0 43 3 41 14 21 19.6 30 192 4 42 4 33 44 4 36 42 0 55 44 8 28 -1.73 34 0 0 43 3 40 14 21 21.8 29 193 3 42 4 32 44 4 35 42 0 54 44 8 27 -1.73 35 0 0 43 4 6 14 21 23.9 29 194 3 42 4 58 44 5 2 42 1 20 44 8 54 -1.73 36 0 0 43 5 0 14 21 26.1 29 195 2 42 5 51 44 5 57 42 2 13 44 9 49 -1.73 37 0 0 43 6 21 14 21 28.3 29 196 1 42 7 12 44 7 19 42 3 33 44 11 11 -1.73 38 0 0 43 8 9 14 21 30.4 29 197 1 42 8 59 44 9 9 42 5 20 44 13 1 -1.73 39 0 0 43 10 25 14 21 32.5 28 198 0 42 11 13 44 11 26 42 7 34 44 15 18 -1.73 40 0 0 43 13 8 14 21 34.6 28 199 -1 42 13 53 44 14 11 42 10 15 44 18 3 -1.73 41 0 0 43 16 17 14 21 36.7 28 200 -2 42 17 1 44 17 23 42 13 22 44 21 16 -1.73 42 0 0 43 19 54 14 21 38.8 28 201 -2 42 20 35 44 21 3 42 16 56 44 24 56 -1.73 43 0 0 43 23 58 14 21 40.8 27 202 -3 42 24 35 44 25 11 42 20 56 44 29 4 -1.73 44 0 0 43 28 29 14 21 42.8 27 203 -4 42 29 3 44 29 46 42 25 24 44 33 39 -1.73 45 0 0 43 33 27 14 21 44.8 26 204 -4 42 33 57 44 34 48 42 30 17 44 38 41 -1.73 46 0 0 43 38 51 14 21 46.8 26 205 -5 42 39 17 44 40 16 42 35 37 44 44 10 -1.73 47 0 0 43 44 42 14 21 48.7 26 206 -6 42 45 4 44 46 12 42 41 24 44 50 6 -1.73 48 0 0 43 50 59 14 21 50.6 25 207 -7 42 51 16 44 52 35 42 47 36 44 56 29 -1.73 49 0 0 43 57 43 14 21 52.5 25 208 -7 42 57 54 44 59 23 42 54 14 45 3 18 -1.73 50 0 0 44 4 52 14 21 54.3 24 209 -8 43 4 58 45 6 39 43 1 17 45 10 34 -1.73 51 0 0 44 12 27 14 21 56.1 24 210 -9 43 12 27 45 14 20 43 8 46 45 18 16 -1.73 52 0 0 44 20 28 14 21 57.9 23 211 -10 43 20 22 45 22 28 43 16 40 45 26 24 -1.73 53 0 0 44 28 54 14 21 59.6 23 212 -10 43 28 41 45 31 1 43 24 59 45 34 58 -1.74 54 0 0 44 37 45 14 22 1.3 22 213 -11 43 37 26 45 40 0 43 33 44 45 43 57 -1.74 55 0 0 44 47 2 14 22 3.0 22 214 -12 43 46 35 45 49 24 43 42 52 45 53 22 -1.74 56 0 0 44 56 43 14 22 4.6 21 215 -13 43 56 9 45 59 14 43 52 26 46 3 12 -1.74 57 0 0 45 6 49 14 22 6.2 21 216 -13 44 6 7 46 9 28 44 2 23 46 13 27 -1.74 58 0 0 45 17 19 14 22 7.7 20 217 -14 44 16 29 46 20 7 44 12 45 46 24 6 -1.74 59 0 0 45 28 12 14 22 9.2 20 218 -15 44 27 14 46 31 10 44 23 29 46 35 10 -1.74 60 0 0 45 39 30 14 22 10.6 19 218 -15 44 38 23 46 42 37 44 34 38 46 46 38 -1.74 61 0 0 45 51 11 14 22 12.1 18 219 -16 44 49 55 46 54 28 44 46 9 46 58 29 -1.74 62 0 0 46 3 15 14 22 13.4 18 220 -17 45 1 50 47 6 42 44 58 3 47 10 44 -1.74 63 0 0 46 15 42 14 22 14.7 17 221 -18 45 14 7 47 19 20 45 10 20 47 23 22 -1.74 64 0 0 46 28 31 14 22 16.0 17 222 -18 45 26 46 47 32 20 45 22 59 47 36 23 -1.74 65 0 0 46 41 42 14 22 17.2 16 223 -19 45 39 47 47 45 42 45 35 59 47 49 46 -1.74 66 0 0 46 55 15 14 22 18.4 15 223 -20 45 53 9 47 59 26 45 49 21 48 3 31 -1.74 67 0 0 47 9 9 14 22 19.5 15 224 -20 46 6 53 48 13 32 46 3 4 48 17 38 -1.74 68 0 0 47 23 24 14 22 20.6 14 225 -21 46 20 57 48 27 59 46 17 7 48 32 6 -1.75 69 0 0 47 37 59 14 22 21.6 13 226 -22 46 35 21 48 42 47 46 31 31 48 46 55 -1.75 70 0 0 47 52 55 14 22 22.6 13 227 -22 46 50 5 48 57 55 46 46 14 49 2 4 -1.75 71 0 0 48 8 10 14 22 23.6 12 228 -23 47 5 9 49 13 24 47 1 17 49 17 33 -1.75 72 0 0 48 23 44 14 22 24.4 11 228 -24 47 20 31 49 29 11 47 16 39 49 33 21 -1.75 73 0 0 48 39 37 14 22 25.3 11 229 -24 47 36 12 49 45 17 47 32 19 49 49 28 -1.75 74 0 0 48 55 49 14 22 26.0 10 230 -25 47 52 11 50 1 42 47 48 17 50 5 54 -1.75 75 0 0 49 12 18 14 22 26.7 9 231 -25 48 8 28 50 18 25 48 4 33 50 22 38 -1.76 76 0 0 49 29 4 14 22 27.4 9 232 -26 48 25 1 50 35 26 48 21 6 50 39 39 -1.76 77 0 0 49 46 7 14 22 28.0 8 232 -27 48 41 52 50 52 43 48 37 55 50 56 57 -1.76 78 0 0 50 3 26 14 22 28.6 7 233 -27 48 58 58 51 10 17 48 55 1 51 14 32 -1.77 79 0 0 50 21 1 14 22 29.1 7 234 -28 49 16 20 51 28 6 49 12 22 51 32 23 -1.77 80 0 0 50 38 51 14 22 29.6 6 235 -28 49 33 56 51 46 11 49 29 58 51 50 28 -1.78 81 0 0 50 56 55 14 22 30.0 5 235 -29 49 51 47 52 4 30 49 47 48 52 8 48 -1.79 82 0 0 51 15 13 14 22 30.3 5 236 -29 50 9 52 52 23 3 50 5 52 52 27 23 -1.80 83 0 0 51 33 45 14 22 30.6 4 237 -30 50 28 10 52 41 50 50 24 9 52 46 11 -1.81 84 0 0 51 52 30 14 22 30.9 3 238 -30 50 46 41 53 0 50 50 42 39 53 5 11 -1.83 85 0 0 52 11 26 14 22 31.1 2 239 -31 51 5 24 53 20 2 51 1 22 53 24 24 -1.85 86 0 0 52 30 34 14 22 31.2 2 239 -31 51 24 19 53 39 25 51 20 15 53 43 49 -1.91 87 0 0 52 49 53 14 22 31.3 1 240 -32 51 43 24 53 58 59 51 39 20 54 3 24 -2.02 88 0 0 53 9 22 14 22 31.4 0 241 -32 52 2 39 .. .. .. 51 58 34 .. .. .. -2.48 89 0 0 .. .. .... .. .. .. .. .. .. 52 22 4 .. .. .. 52 17 59 .. .. .. .... Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 367-115392 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 07 41.4674 DE: -16 39 27.359 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 07 41.4673 DE: -16 39 27.359 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.4 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (56) Melete asteroid class: approx. diameter [km]: 111 approx. diameter ["]: 0.067 distance from Earth [AU]: 2.28600 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#129 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", 87.812° remarks: * orbital elements for (56)Melete : Mean anomaly = 359.8638361250 deg Arg. of pericenter = 104.8955967099 deg Long. of node = 192.9365859880 deg Inclination = 8.0812175598 deg Eccentricity = 0.2371237212 Semimajor axis = 2.5971988382 AU Perihelion dist = 1.9813413849 AU Mag: H = 8.53, G = 0.15 Epoch of elements : MJD 60608.59797112 TDT (2024 Oct 25.5980) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1292023Apr24,3.01,2024,10,25,14.351313,0.047878,0.861780,20.783901,-1.164352,0.004606,0.000386,-0.000001,0.000000 22.5442,-16.6546,-39.27,-12.40,False UCAC4 367-115392,18.12818545,-16.6575997,11.64,11.40,11.27,0.0,0,,18.15188277,-16.6545976,1.80,1.55,0,0,0 56,Melete,12.97,111.040,2.2860,0,0,5.564,-4.48,,5.6,0 0,359.7230,2024,10,25,104.8956,192.9366,8.0812,0.23712,2.59720,1.98134,8.52,5.0,0.15 1.031,0.0093,0.0019,88,0.0021,Known errors,0.75,0,-1,-1 20241025_115392,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org