IOTA/IOTA-ES occultation update for (435) Ella / UCAC4 329-179010 event on 2024 Nov 08, 11:28 UT Visible from Summary ------- On 2024 Nov 08 UT, the 38.557 km diameter asteroid (435) Ella will occult a 10.7 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 4.54 mag to 15.19 mag (the magnitude of the asteroid) for at most 1.100 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 Nov 08, 11:25 - 2024 Nov 08, 11:30 * geocentric midpoint of event [JD]: 2460622.97792841 * magnitude of target star: 10.67 * magnitude drop [mag]: 4.54 * estimated maximum duration [s]: 1.100 * Moon: 42 % sunlit, 24° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 48 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 85°) * approx speed of asteroid's shadow [km/s]: 35.0606 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 329-179010 by 435 Ella on 2024 Nov 8 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 - 10 0 0 26 21 36 11 25 47.1 1 118 45 26 7 3 26 36 13 26 3 59 26 39 18 .... - 9 0 0 25 54 8 11 25 47.2 2 118 45 25 39 36 26 8 42 25 36 33 26 11 46 -0.44 - 8 0 0 25 26 54 11 25 47.4 3 119 46 25 12 25 25 41 26 25 9 23 25 44 30 -0.54 - 7 0 0 24 59 57 11 25 47.6 4 119 47 24 45 31 25 14 27 24 42 29 25 17 31 -0.59 - 6 0 0 24 33 18 11 25 47.9 5 119 48 24 18 54 24 47 45 24 15 52 24 50 48 -0.62 - 5 0 0 24 6 56 11 25 48.3 6 120 48 23 52 34 24 21 21 23 49 33 24 24 24 -0.64 - 4 0 0 23 40 53 11 25 48.7 7 120 49 23 26 34 23 55 15 23 23 33 23 58 18 -0.66 - 3 0 0 23 15 9 11 25 49.2 8 121 49 23 0 52 23 29 29 22 57 52 23 32 31 -0.67 - 2 0 0 22 49 46 11 25 49.8 9 121 50 22 35 31 23 4 3 22 32 31 23 7 5 -0.68 - 1 0 0 22 24 43 11 25 50.5 10 121 51 22 10 31 22 38 58 22 7 31 22 41 59 -0.68 0 0 0 22 0 1 11 25 51.2 11 122 51 21 45 52 22 14 14 21 42 53 22 17 14 -0.69 1 0 0 21 35 42 11 25 52.0 12 122 52 21 21 35 21 49 52 21 18 36 21 52 52 -0.69 2 0 0 21 11 45 11 25 52.9 13 123 52 20 57 40 21 25 53 20 54 42 21 28 52 -0.70 3 0 0 20 48 12 11 25 53.8 14 123 52 20 34 9 21 2 17 20 31 12 21 5 16 -0.70 4 0 0 20 25 2 11 25 54.8 15 123 53 20 11 2 20 39 5 20 8 5 20 42 3 -0.70 5 0 0 20 2 17 11 25 55.9 16 124 53 19 48 19 20 16 17 19 45 22 20 19 15 -0.71 6 0 0 19 39 56 11 25 57.0 17 124 54 19 26 0 19 53 55 19 23 4 19 56 52 -0.71 7 0 0 19 18 1 11 25 58.2 18 125 54 19 4 8 19 31 57 19 1 12 19 34 54 -0.71 8 0 0 18 56 32 11 25 59.5 19 125 54 18 42 41 19 10 26 18 39 46 19 13 22 -0.71 9 0 0 18 35 29 11 26 0.8 20 125 54 18 21 40 18 49 20 18 18 45 18 52 16 -0.71 10 0 0 18 14 53 11 26 2.2 21 126 55 18 1 6 18 28 42 17 58 12 18 31 37 -0.72 11 0 0 17 54 44 11 26 3.7 22 126 55 17 40 59 18 8 31 17 38 6 18 11 26 -0.72 12 0 0 17 35 3 11 26 5.2 23 127 55 17 21 20 17 48 48 17 18 27 17 51 42 -0.72 13 0 0 17 15 49 11 26 6.8 24 127 55 17 2 9 17 29 32 16 59 16 17 32 26 -0.72 14 0 0 16 57 4 11 26 8.4 25 128 55 16 43 26 17 10 45 16 40 34 17 13 39 -0.72 15 0 0 16 38 48 11 26 10.1 26 128 55 16 25 12 16 52 27 16 22 20 16 55 20 -0.72 16 0 0 16 21 1 11 26 11.8 27 129 55 16 7 27 16 34 38 16 4 35 16 37 31 -0.72 17 0 0 16 3 44 11 26 13.7 28 129 55 15 50 11 16 17 19 15 47 20 16 20 11 -0.72 18 0 0 15 46 56 11 26 15.5 28 129 55 15 33 25 16 0 29 15 30 34 16 3 21 -0.72 19 0 0 15 30 38 11 26 17.5 29 130 55 15 17 9 15 44 9 15 14 19 15 47 0 -0.73 20 0 0 15 14 50 11 26 19.4 30 131 55 15 1 23 15 28 20 14 58 33 15 31 11 -0.73 21 0 0 14 59 33 11 26 21.5 31 131 54 14 46 8 15 13 1 14 43 18 15 15 51 -0.73 22 0 0 14 44 47 11 26 23.6 32 132 54 14 31 23 14 58 13 14 28 34 15 1 3 -0.73 23 0 0 14 30 31 11 26 25.7 33 132 54 14 17 9 14 43 56 14 14 21 14 46 46 -0.73 24 0 0 14 16 47 11 26 27.9 34 133 53 14 3 27 14 30 10 14 0 38 14 33 0 -0.73 25 0 0 14 3 35 11 26 30.1 35 133 53 13 50 16 14 16 56 13 47 28 14 19 45 -0.73 26 0 0 13 50 54 11 26 32.4 36 134 53 13 37 36 14 4 14 13 34 49 14 7 3 -0.73 27 0 0 13 38 45 11 26 34.7 36 135 52 13 25 29 13 52 3 13 22 41 13 54 52 -0.73 28 0 0 13 27 8 11 26 37.1 37 135 52 13 13 53 13 40 25 13 11 6 13 43 13 -0.73 29 0 0 13 16 3 11 26 39.5 38 136 51 13 2 49 13 29 19 13 0 2 13 32 7 -0.73 30 0 0 13 5 30 11 26 42.0 39 137 51 12 52 18 13 18 45 12 49 31 13 21 33 -0.73 31 0 0 12 55 30 11 26 44.5 40 137 50 12 42 19 13 8 44 12 39 33 13 11 31 -0.73 32 0 0 12 46 3 11 26 47.0 40 138 50 12 32 53 12 59 15 12 30 6 13 2 2 -0.73 33 0 0 12 37 8 11 26 49.6 41 139 49 12 23 59 12 50 19 12 21 13 12 53 6 -0.73 34 0 0 12 28 46 11 26 52.2 42 140 49 12 15 38 12 41 56 12 12 52 12 44 43 -0.74 35 0 0 12 20 57 11 26 54.9 43 140 48 12 7 50 12 34 6 12 5 4 12 36 53 -0.74 36 0 0 12 13 41 11 26 57.5 43 141 47 12 0 35 12 26 49 11 57 49 12 29 36 -0.74 37 0 0 12 6 58 11 27 0.3 44 142 47 11 53 53 12 20 6 11 51 7 12 22 52 -0.74 38 0 0 12 0 48 11 27 3.0 45 143 46 11 47 44 12 13 55 11 44 59 12 16 41 -0.74 39 0 0 11 55 12 11 27 5.8 45 144 45 11 42 8 12 8 18 11 39 23 12 11 4 -0.74 40 0 0 11 50 9 11 27 8.6 46 145 44 11 37 6 12 3 15 11 34 21 12 6 1 -0.74 41 0 0 11 45 39 11 27 11.5 47 146 44 11 32 37 11 58 45 11 29 52 12 1 30 -0.74 42 0 0 11 41 43 11 27 14.3 47 147 43 11 28 41 11 54 48 11 25 56 11 57 34 -0.74 43 0 0 11 38 21 11 27 17.2 48 148 42 11 25 19 11 51 25 11 22 34 11 54 11 -0.74 44 0 0 11 35 32 11 27 20.2 48 149 41 11 22 30 11 48 36 11 19 46 11 51 21 -0.74 45 0 0 11 33 16 11 27 23.1 49 150 41 11 20 15 11 46 20 11 17 31 11 49 6 -0.74 46 0 0 11 31 35 11 27 26.1 49 152 40 11 18 33 11 44 38 11 15 49 11 47 24 -0.74 47 0 0 11 30 27 11 27 29.1 50 153 39 11 17 25 11 43 30 11 14 41 11 46 15 -0.74 48 0 0 11 29 52 11 27 32.1 50 154 38 11 16 51 11 42 55 11 14 7 11 45 41 -0.74 49 0 0 11 29 51 11 27 35.1 51 155 37 11 16 50 11 42 55 11 14 6 11 45 40 -0.74 50 0 0 11 30 24 11 27 38.2 51 157 37 11 17 23 11 43 28 11 14 39 11 46 13 -0.74 51 0 0 11 31 31 11 27 41.3 52 158 36 11 18 30 11 44 35 11 15 45 11 47 20 -0.74 52 0 0 11 33 11 11 27 44.3 52 160 35 11 20 10 11 46 15 11 17 25 11 49 1 -0.74 53 0 0 11 35 25 11 27 47.4 52 161 34 11 22 24 11 48 29 11 19 39 11 51 15 -0.74 54 0 0 11 38 13 11 27 50.5 52 162 33 11 25 11 11 51 18 11 22 26 11 54 3 -0.74 55 0 0 11 41 34 11 27 53.7 53 164 32 11 28 32 11 54 39 11 25 47 11 57 25 -0.74 56 0 0 11 45 29 11 27 56.8 53 165 31 11 32 26 11 58 35 11 29 42 12 1 21 -0.74 57 0 0 11 49 58 11 27 59.9 53 167 30 11 36 54 12 3 4 11 34 9 12 5 50 -0.74 58 0 0 11 55 0 11 28 3.1 53 168 29 11 41 56 12 8 7 11 39 11 12 10 53 -0.74 59 0 0 12 0 36 11 28 6.3 53 170 28 11 47 31 12 13 43 11 44 46 12 16 29 -0.74 60 0 0 12 6 45 11 28 9.4 53 171 28 11 53 39 12 19 53 11 50 54 12 22 39 -0.74 61 0 0 12 13 27 11 28 12.6 53 173 27 12 0 21 12 26 36 11 57 35 12 29 23 -0.74 62 0 0 12 20 43 11 28 15.7 53 175 26 12 7 36 12 33 53 12 4 50 12 36 39 -0.74 63 0 0 12 28 32 11 28 18.9 53 176 25 12 15 24 12 41 43 12 12 38 12 44 30 -0.74 64 0 0 12 36 54 11 28 22.1 53 178 24 12 23 45 12 50 6 12 20 59 12 52 53 -0.74 65 0 0 12 45 49 11 28 25.2 53 179 23 12 32 39 12 59 2 12 29 53 13 1 50 -0.74 66 0 0 12 55 18 11 28 28.4 53 181 22 12 42 6 13 8 32 12 39 19 13 11 19 -0.74 67 0 0 13 5 19 11 28 31.6 53 182 21 12 52 6 13 18 34 12 49 19 13 21 22 -0.74 68 0 0 13 15 53 11 28 34.7 53 184 20 13 2 39 13 29 9 12 59 51 13 31 57 -0.74 69 0 0 13 26 59 11 28 37.9 52 185 19 13 13 44 13 40 17 13 10 56 13 43 5 -0.74 70 0 0 13 38 38 11 28 41.0 52 187 18 13 25 21 13 51 57 13 22 33 13 54 46 -0.74 71 0 0 13 50 49 11 28 44.1 52 188 17 13 37 31 14 4 10 13 34 43 14 6 59 -0.74 72 0 0 14 3 32 11 28 47.2 51 190 16 13 50 13 14 16 54 13 47 24 14 19 44 -0.74 73 0 0 14 16 48 11 28 50.3 51 191 15 14 3 26 14 30 11 14 0 38 14 33 1 -0.74 74 0 0 14 30 35 11 28 53.4 50 192 14 14 17 12 14 44 0 14 14 23 14 46 50 -0.74 75 0 0 14 44 53 11 28 56.5 50 194 13 14 31 29 14 58 20 14 28 40 15 1 11 -0.74 76 0 0 14 59 43 11 28 59.5 50 195 12 14 46 17 15 13 12 14 43 28 15 16 3 -0.74 77 0 0 15 15 5 11 29 2.6 49 196 11 15 1 37 15 28 35 14 58 47 15 31 26 -0.74 78 0 0 15 30 57 11 29 5.6 48 198 10 15 17 27 15 44 29 15 14 37 15 47 21 -0.74 79 0 0 15 47 20 11 29 8.5 48 199 9 15 33 48 16 0 54 15 30 57 16 3 46 -0.74 80 0 0 16 4 13 11 29 11.5 47 200 8 15 50 39 16 17 49 15 47 48 16 20 42 -0.74 81 0 0 16 21 36 11 29 14.4 47 201 7 16 8 1 16 35 14 16 5 9 16 38 7 -0.74 82 0 0 16 39 29 11 29 17.3 46 202 6 16 25 52 16 53 9 16 23 0 16 56 3 -0.74 83 0 0 16 57 52 11 29 20.2 45 203 5 16 44 12 17 11 34 16 41 20 17 14 28 -0.74 84 0 0 17 16 44 11 29 23.1 45 204 4 17 3 2 17 30 28 17 0 9 17 33 22 -0.74 85 0 0 17 36 4 11 29 25.9 44 205 3 17 22 21 17 49 51 17 19 27 17 52 46 -0.74 86 0 0 17 55 53 11 29 28.7 43 206 2 17 42 7 18 9 42 17 39 13 18 12 37 -0.74 87 0 0 18 16 10 11 29 31.4 43 207 1 18 2 22 18 30 1 17 59 28 18 32 57 -0.74 88 0 0 18 36 55 11 29 34.1 42 208 0 18 23 4 18 50 48 18 20 10 18 53 44 -0.74 89 0 0 18 58 7 11 29 36.8 41 209 -1 18 44 14 19 12 2 18 41 19 19 14 59 -0.74 90 0 0 19 19 45 11 29 39.4 40 210 -2 19 5 50 19 33 43 19 2 54 19 36 40 -0.74 91 0 0 19 41 50 11 29 42.0 40 211 -3 19 27 53 19 55 50 19 24 56 19 58 48 -0.74 92 0 0 20 4 21 11 29 44.6 39 212 -4 19 50 21 20 18 23 19 47 24 20 21 21 -0.74 93 0 0 20 27 16 11 29 47.1 38 213 -5 20 13 14 20 41 21 20 10 17 20 44 20 -0.74 94 0 0 20 50 37 11 29 49.5 37 214 -6 20 36 33 21 4 44 20 33 35 21 7 43 -0.74 95 0 0 21 14 22 11 29 51.9 36 214 -7 21 0 15 21 28 31 20 57 17 21 31 31 -0.74 96 0 0 21 38 30 11 29 54.3 35 215 -8 21 24 21 21 52 42 21 21 22 21 55 42 -0.74 97 0 0 22 3 1 11 29 56.6 34 216 -9 21 48 49 22 17 16 21 45 50 22 20 16 -0.74 98 0 0 22 27 55 11 29 58.9 34 217 -10 22 13 41 22 42 12 22 10 41 22 45 13 -0.74 99 0 0 22 53 10 11 30 1.1 33 217 -11 22 38 54 23 7 30 22 35 53 23 10 31 -0.74 100 0 0 23 18 46 11 30 3.2 32 218 -12 23 4 27 23 33 8 23 1 27 23 36 10 -0.74 101 0 0 23 44 43 11 30 5.3 31 219 -13 23 30 22 23 59 7 23 27 21 24 2 10 -0.74 102 0 0 24 11 0 11 30 7.3 30 219 -14 23 56 36 24 25 26 23 53 34 24 28 29 -0.74 103 0 0 24 37 35 11 30 9.3 29 220 -15 24 23 9 24 52 4 24 20 6 24 55 8 -0.74 104 0 0 25 4 28 11 30 11.2 28 221 -16 24 50 0 25 19 0 24 46 57 25 22 4 -0.74 105 0 0 25 31 39 11 30 13.1 27 221 -17 25 17 8 25 46 13 25 14 5 25 49 18 -0.74 106 0 0 25 59 6 11 30 14.9 26 222 -18 25 44 33 26 13 43 25 41 29 26 16 48 -0.74 107 0 0 26 26 50 11 30 16.6 25 222 -19 26 12 14 26 41 28 26 9 10 26 44 34 -0.74 108 0 0 26 54 48 11 30 18.3 24 223 -20 26 40 10 27 9 29 26 37 5 27 12 35 -0.74 109 0 0 27 23 0 11 30 19.9 23 224 -21 27 8 20 27 37 43 27 5 15 27 40 50 -0.74 110 0 0 27 51 25 11 30 21.5 22 224 -22 27 36 43 28 6 11 27 33 37 28 9 18 -0.74 111 0 0 28 20 3 11 30 23.0 21 225 -23 28 5 19 28 34 51 28 2 13 28 37 59 -0.74 112 0 0 28 48 53 11 30 24.4 20 225 -24 28 34 6 29 3 42 28 30 59 29 6 51 -0.75 113 0 0 29 17 52 11 30 25.7 19 226 -25 29 3 4 29 32 44 28 59 57 29 35 53 -0.75 114 0 0 29 47 2 11 30 27.0 19 227 -26 29 32 11 30 1 56 29 29 4 30 5 5 -0.75 115 0 0 30 16 20 11 30 28.2 18 227 -27 30 1 27 30 31 16 29 58 19 30 34 26 -0.75 116 0 0 30 45 46 11 30 29.4 17 228 -28 30 30 51 31 0 44 30 27 43 31 3 54 -0.75 117 0 0 31 15 19 11 30 30.5 16 228 -29 31 0 22 31 30 19 30 57 14 31 33 29 -0.75 118 0 0 31 44 58 11 30 31.5 15 229 -29 31 29 59 31 59 59 31 26 50 32 3 10 -0.75 119 0 0 32 14 41 11 30 32.4 14 229 -30 31 59 41 32 29 45 31 56 32 32 32 56 -0.75 120 0 0 32 44 29 11 30 33.3 13 230 -31 32 29 27 32 59 34 32 26 17 33 2 45 -0.75 121 0 0 33 14 19 11 30 34.1 12 231 -32 32 59 16 33 29 26 32 56 6 33 32 38 -0.75 122 0 0 33 44 12 11 30 34.9 11 231 -33 33 29 7 33 59 20 33 25 56 34 2 32 -0.75 123 0 0 34 14 5 11 30 35.5 10 232 -34 33 58 59 34 29 15 33 55 48 34 32 27 -0.75 124 0 0 34 43 59 11 30 36.2 9 232 -34 34 28 51 34 59 10 34 25 40 35 2 23 -0.75 125 0 0 35 13 52 11 30 36.7 8 233 -35 34 58 43 35 29 4 34 55 32 35 32 17 -0.76 126 0 0 35 43 43 11 30 37.2 7 234 -36 35 28 33 35 58 56 35 25 21 36 2 9 -0.76 127 0 0 36 13 31 11 30 37.6 6 234 -37 35 58 20 36 28 46 35 55 8 36 31 59 -0.76 128 0 0 36 43 16 11 30 38.0 5 235 -38 36 28 4 36 58 31 36 24 52 37 1 45 -0.76 129 0 0 37 12 56 11 30 38.2 4 235 -38 36 57 43 37 28 12 36 54 31 37 31 26 -0.77 130 0 0 37 42 30 11 30 38.5 3 236 -39 37 27 16 37 57 47 37 24 4 38 1 1 -0.78 131 0 0 38 11 58 11 30 38.6 2 237 -40 37 56 44 38 27 16 37 53 31 38 30 30 -0.80 132 0 0 38 41 19 11 30 38.8 1 237 -40 38 26 4 38 56 37 38 22 51 38 59 52 -0.84 133 0 0 39 10 31 11 30 38.8 0 238 -41 38 55 16 39 25 50 38 52 3 39 29 5 -1.05 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 329-179010 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 01 26.6242 DE: -24 12 38.930 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 01 26.6240 DE: -24 12 38.930 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.7 * B mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (435) Ella asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.021 distance from Earth [AU]: 2.53520 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#95 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", 84.985° remarks: * orbital elements for (435)Ella : Mean anomaly = 322.6224721724 deg Arg. of pericenter = 333.4873884551 deg Long. of node = 23.1317297618 deg Inclination = 1.8158014501 deg Eccentricity = 0.1545942327 Semimajor axis = 2.4499485369 AU Perihelion dist = 2.0712006227 AU Mag: H = 10.40, G = 0.15 Epoch of elements : MJD 60622.47792812 TDT (2024 Nov 08.4779) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#952023Apr24,1.10,2024,11,8,11.470282,-0.074958,0.591268,19.632487,2.485351,0.004670,0.000430,-0.000001,0.000000 65.5362,-24.1767,3.89,-16.79,False UCAC4 329-179010,19.02406232,-24.2108138,10.86,10.67,10.57,0.0,0,,19.04902691,-24.1766727,4.54,4.20,0,0,0 435,Ella,15.19,38.557,2.5352,0,0,4.977,8.63,,2.0,0 0,322.4996,2024,11,8,333.4874,23.1317,1.8158,0.15459,2.44995,2.07120,10.40,5.0,0.15 1.105,0.0140,0.0021,85,0.0022,Known errors,0.90,0,-1,-1 20241108_179010,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org