IOTA/IOTA-ES occultation update for (435) Ella / TYC 6864-00858-1 event on 2024 Nov 04, 17:21 UT Visible from Summary ------- On 2024 Nov 04 UT, the 38.531508199023 km diameter asteroid (435) Ella will occult a 10.9 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 4.35 mag to 15.18 mag (the magnitude of the asteroid) for at most 1.140 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 04, 17:18 - 2024 Nov 04, 17:23 * geocentric midpoint of event [JD]: 2460619.22316175 * magnitude of target star: 10.85 * magnitude drop [mag]: 4.35 * estimated maximum duration [s]: 1.140 * Moon: 9 % sunlit, 25° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 52 * 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", 86°) * approx speed of asteroid's shadow [km/s]: 33.9934 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6864-00858-1 by 435 Ella on 2024 Nov 4 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 - 94 0 0 31 57 49 17 19 1.7 0 119 41 31 41 47 .. .. .. 31 38 20 .. .. .. .... - 93 0 0 31 29 27 17 19 1.7 1 120 42 31 13 27 31 45 31 31 10 1 31 48 59 -0.23 - 92 0 0 31 1 20 17 19 1.8 2 120 43 30 45 23 31 17 21 30 41 58 31 20 48 -0.56 - 91 0 0 30 33 30 17 19 2.0 3 121 43 30 17 36 30 49 27 30 14 12 30 52 54 -0.67 - 90 0 0 30 5 57 17 19 2.3 4 121 44 29 50 7 30 21 51 29 46 43 30 25 17 -0.72 - 89 0 0 29 38 42 17 19 2.6 5 122 45 29 22 56 29 54 34 29 19 32 29 57 59 -0.76 - 88 0 0 29 11 47 17 19 3.0 6 122 45 28 56 4 29 27 35 28 52 41 29 31 0 -0.78 - 87 0 0 28 45 12 17 19 3.5 7 123 46 28 29 32 29 0 57 28 26 10 29 4 21 -0.80 - 86 0 0 28 18 57 17 19 4.0 8 123 46 28 3 20 28 34 39 27 59 59 28 38 2 -0.81 - 85 0 0 27 53 4 17 19 4.6 9 124 47 27 37 30 28 8 43 27 34 9 28 12 5 -0.82 - 84 0 0 27 27 33 17 19 5.3 10 124 47 27 12 2 27 43 8 27 8 42 27 46 30 -0.83 - 83 0 0 27 2 25 17 19 6.1 11 125 47 26 46 57 27 17 57 26 43 38 27 21 18 -0.83 - 82 0 0 26 37 40 17 19 6.9 12 125 48 26 22 15 26 53 9 26 18 57 26 56 30 -0.84 - 81 0 0 26 13 20 17 19 7.8 13 126 48 25 57 58 26 28 46 25 54 40 26 32 6 -0.84 - 80 0 0 25 49 24 17 19 8.8 14 126 48 25 34 6 26 4 47 25 30 48 26 8 6 -0.85 - 79 0 0 25 25 54 17 19 9.9 15 126 49 25 10 38 25 41 14 25 7 22 25 44 32 -0.85 - 78 0 0 25 2 50 17 19 11.0 16 127 49 24 47 37 25 18 6 24 44 21 25 21 24 -0.85 - 77 0 0 24 40 12 17 19 12.2 17 127 49 24 25 2 24 55 26 24 21 47 24 58 43 -0.86 - 76 0 0 24 18 1 17 19 13.5 17 128 49 24 2 54 24 33 12 23 59 40 24 36 29 -0.86 - 75 0 0 23 56 18 17 19 14.8 18 128 50 23 41 14 24 11 26 23 38 0 24 14 42 -0.86 - 74 0 0 23 35 3 17 19 16.2 19 129 50 23 20 2 23 50 9 23 16 48 23 53 24 -0.86 - 73 0 0 23 14 17 17 19 17.7 20 129 50 22 59 18 23 29 19 22 56 5 23 32 34 -0.86 - 72 0 0 22 54 0 17 19 19.2 21 130 50 22 39 4 23 8 59 22 35 51 23 12 13 -0.87 - 71 0 0 22 34 12 17 19 20.8 22 131 50 22 19 18 22 49 8 22 16 7 22 52 22 -0.87 - 70 0 0 22 14 53 17 19 22.4 23 131 50 22 0 3 22 29 48 21 56 51 22 33 1 -0.87 - 69 0 0 21 56 5 17 19 24.2 24 132 50 21 41 17 22 10 57 21 38 7 22 14 9 -0.87 - 68 0 0 21 37 48 17 19 26.0 25 132 50 21 23 2 21 52 37 21 19 52 21 55 49 -0.87 - 67 0 0 21 20 1 17 19 27.8 26 133 50 21 5 18 21 34 48 21 2 9 21 38 0 -0.87 - 66 0 0 21 2 46 17 19 29.7 27 133 49 20 48 6 21 17 31 20 44 56 21 20 41 -0.87 - 65 0 0 20 46 3 17 19 31.7 27 134 49 20 31 24 21 0 45 20 28 16 21 3 55 -0.88 - 64 0 0 20 29 51 17 19 33.7 28 134 49 20 15 15 20 44 31 20 12 7 20 47 41 -0.88 - 63 0 0 20 14 12 17 19 35.8 29 135 49 19 59 37 20 28 49 19 56 30 20 31 59 -0.88 - 62 0 0 19 59 4 17 19 37.9 30 136 48 19 44 32 20 13 40 19 41 25 20 16 49 -0.88 - 61 0 0 19 44 30 17 19 40.1 31 136 48 19 30 0 19 59 3 19 26 53 20 2 12 -0.88 - 60 0 0 19 30 29 17 19 42.3 32 137 48 19 16 1 19 45 0 19 12 54 19 48 8 -0.88 - 59 0 0 19 17 0 17 19 44.6 33 138 47 19 2 34 19 31 30 18 59 28 19 34 38 -0.88 - 58 0 0 19 4 6 17 19 46.9 33 138 47 18 49 41 19 18 33 18 46 35 19 21 41 -0.88 - 57 0 0 18 51 44 17 19 49.3 34 139 46 18 37 22 19 6 10 18 34 16 19 9 17 -0.88 - 56 0 0 18 39 57 17 19 51.7 35 140 46 18 25 36 18 54 21 18 22 31 18 57 28 -0.88 - 55 0 0 18 28 43 17 19 54.2 36 141 45 18 14 24 18 43 6 18 11 19 18 46 12 -0.88 - 54 0 0 18 18 4 17 19 56.7 36 141 45 18 3 46 18 32 25 18 0 42 18 35 31 -0.88 - 53 0 0 18 7 59 17 19 59.3 37 142 44 17 53 42 18 22 18 17 50 38 18 25 24 -0.89 - 52 0 0 17 58 28 17 20 1.9 38 143 44 17 44 13 18 12 46 17 41 9 18 15 52 -0.89 - 51 0 0 17 49 32 17 20 4.6 38 144 43 17 35 18 18 3 49 17 32 14 18 6 54 -0.89 - 50 0 0 17 41 10 17 20 7.2 39 145 43 17 26 57 17 55 26 17 23 54 17 58 31 -0.89 - 49 0 0 17 33 23 17 20 10.0 40 146 42 17 19 12 17 47 38 17 16 9 17 50 43 -0.89 - 48 0 0 17 26 12 17 20 12.7 40 147 41 17 12 1 17 40 25 17 8 58 17 43 30 -0.89 - 47 0 0 17 19 35 17 20 15.5 41 148 41 17 5 25 17 33 48 17 2 22 17 36 52 -0.89 - 46 0 0 17 13 33 17 20 18.3 42 148 40 16 59 24 17 27 45 16 56 21 17 30 49 -0.89 - 45 0 0 17 8 6 17 20 21.2 42 149 39 16 53 58 17 22 17 16 50 56 17 25 21 -0.89 - 44 0 0 17 3 15 17 20 24.1 43 151 39 16 49 7 17 17 25 16 46 5 17 20 29 -0.89 - 43 0 0 16 58 58 17 20 27.0 43 152 38 16 44 52 17 13 8 16 41 50 17 16 12 -0.89 - 42 0 0 16 55 18 17 20 29.9 44 153 37 16 41 11 17 9 27 16 38 9 17 12 30 -0.89 - 41 0 0 16 52 12 17 20 32.9 44 154 36 16 38 6 17 6 21 16 35 4 17 9 24 -0.89 - 40 0 0 16 49 42 17 20 35.9 45 155 36 16 35 36 17 3 51 16 32 35 17 6 54 -0.89 - 39 0 0 16 47 47 17 20 38.9 45 156 35 16 33 42 17 1 56 16 30 40 17 4 59 -0.89 - 38 0 0 16 46 28 17 20 41.9 46 157 34 16 32 23 17 0 37 16 29 22 17 3 40 -0.89 - 37 0 0 16 45 45 17 20 45.0 46 158 33 16 31 40 16 59 53 16 28 38 17 2 56 -0.89 - 36 0 0 16 45 37 17 20 48.1 46 160 32 16 31 32 16 59 45 16 28 30 17 2 48 -0.89 - 35 0 0 16 46 4 17 20 51.2 47 161 32 16 31 59 17 0 12 16 28 57 17 3 16 -0.89 - 34 0 0 16 47 7 17 20 54.3 47 162 31 16 33 2 17 1 16 16 30 0 17 4 19 -0.89 - 33 0 0 16 48 46 17 20 57.4 47 164 30 16 34 40 17 2 55 16 31 39 17 5 58 -0.89 - 32 0 0 16 51 0 17 21 0.5 47 165 29 16 36 54 17 5 9 16 33 52 17 8 12 -0.89 - 31 0 0 16 53 50 17 21 3.7 48 166 28 16 39 43 17 7 59 16 36 41 17 11 2 -0.89 - 30 0 0 16 57 15 17 21 6.9 48 168 27 16 43 8 17 11 25 16 40 6 17 14 28 -0.90 - 29 0 0 17 1 15 17 21 10.0 48 169 26 16 47 8 17 15 26 16 44 6 17 18 29 -0.90 - 28 0 0 17 5 51 17 21 13.2 48 170 25 16 51 43 17 20 3 16 48 41 17 23 6 -0.90 - 27 0 0 17 11 3 17 21 16.4 48 172 25 16 56 54 17 25 15 16 53 51 17 28 19 -0.90 - 26 0 0 17 16 49 17 21 19.6 48 173 24 17 2 40 17 31 2 16 59 37 17 34 6 -0.90 - 25 0 0 17 23 11 17 21 22.7 48 174 23 17 9 0 17 37 25 17 5 58 17 40 29 -0.90 - 24 0 0 17 30 8 17 21 25.9 48 176 22 17 15 57 17 44 23 17 12 54 17 47 28 -0.90 - 23 0 0 17 37 41 17 21 29.1 48 177 21 17 23 28 17 51 57 17 20 25 17 55 1 -0.90 - 22 0 0 17 45 48 17 21 32.3 48 179 20 17 31 34 18 0 5 17 28 31 18 3 10 -0.90 - 21 0 0 17 54 30 17 21 35.5 48 180 19 17 40 15 18 8 49 17 37 11 18 11 54 -0.90 - 20 0 0 18 3 47 17 21 38.7 48 181 18 17 49 31 18 18 7 17 46 27 18 21 13 -0.90 - 19 0 0 18 13 39 17 21 41.8 47 183 17 17 59 21 18 28 1 17 56 17 18 31 6 -0.90 - 18 0 0 18 24 6 17 21 45.0 47 184 16 18 9 46 18 38 28 18 6 42 18 41 35 -0.90 - 17 0 0 18 35 7 17 21 48.1 47 185 15 18 20 45 18 49 31 18 17 40 18 52 37 -0.90 - 16 0 0 18 46 42 17 21 51.3 47 187 14 18 32 19 19 1 8 18 29 13 19 4 15 -0.90 - 15 0 0 18 58 51 17 21 54.4 46 188 13 18 44 26 19 13 19 18 41 21 19 16 26 -0.90 - 14 0 0 19 11 34 17 21 57.5 46 189 12 18 57 8 19 26 4 18 54 2 19 29 11 -0.90 - 13 0 0 19 24 51 17 22 0.6 46 191 11 19 10 23 19 39 23 19 7 17 19 42 31 -0.90 - 12 0 0 19 38 42 17 22 3.7 45 192 10 19 24 12 19 53 15 19 21 5 19 56 24 -0.90 - 11 0 0 19 53 6 17 22 6.7 45 193 9 19 38 34 20 7 42 19 35 27 20 10 51 -0.90 - 10 0 0 20 8 3 17 22 9.8 44 194 8 19 53 29 20 22 41 19 50 21 20 25 50 -0.90 - 9 0 0 20 23 33 17 22 12.8 44 195 7 20 8 57 20 38 13 20 5 49 20 41 23 -0.90 - 8 0 0 20 39 36 17 22 15.8 43 197 6 20 24 58 20 54 18 20 21 49 20 57 29 -0.90 - 7 0 0 20 56 12 17 22 18.7 43 198 6 20 41 31 21 10 56 20 38 21 21 14 7 -0.90 - 6 0 0 21 13 19 17 22 21.7 42 199 5 20 58 35 21 28 6 20 55 26 21 31 17 -0.90 - 5 0 0 21 30 58 17 22 24.6 42 200 4 21 16 12 21 45 47 21 13 2 21 48 59 -0.90 - 4 0 0 21 49 9 17 22 27.4 41 201 3 21 34 20 22 4 0 21 31 9 22 7 13 -0.90 - 3 0 0 22 7 50 17 22 30.3 40 202 2 21 52 59 22 22 45 21 49 48 22 25 58 -0.90 - 2 0 0 22 27 3 17 22 33.0 40 203 1 22 12 9 22 42 0 22 8 57 22 45 14 -0.90 - 1 0 0 22 46 46 17 22 35.8 39 204 0 22 31 49 23 1 45 22 28 37 23 5 0 -0.90 0 0 0 23 6 58 17 22 38.5 38 205 -1 22 51 59 23 22 1 22 48 46 23 25 16 -0.90 1 0 0 23 27 41 17 22 41.2 38 206 -2 23 12 39 23 42 46 23 9 25 23 46 2 -0.90 2 0 0 23 48 52 17 22 43.8 37 207 -3 23 33 48 24 4 1 23 30 33 24 7 17 -0.90 3 0 0 24 10 32 17 22 46.4 36 208 -4 23 55 25 24 25 44 23 52 10 24 29 0 -0.90 4 0 0 24 32 41 17 22 49.0 35 209 -5 24 17 30 24 47 55 24 14 15 24 51 12 -0.90 5 0 0 24 55 17 17 22 51.5 35 209 -6 24 40 3 25 10 34 24 36 47 25 13 52 -0.90 6 0 0 25 18 20 17 22 53.9 34 210 -7 25 3 3 25 33 40 24 59 47 25 36 59 -0.90 7 0 0 25 41 50 17 22 56.3 33 211 -8 25 26 30 25 57 13 25 23 13 26 0 32 -0.90 8 0 0 26 5 45 17 22 58.7 32 212 -9 25 50 23 26 21 12 25 47 5 26 24 32 -0.90 9 0 0 26 30 6 17 23 1.0 31 213 -10 26 14 41 26 45 36 26 11 22 26 48 57 -0.90 10 0 0 26 54 52 17 23 3.2 31 213 -11 26 39 24 27 10 25 26 36 4 27 13 47 -0.90 11 0 0 27 20 2 17 23 5.4 30 214 -12 27 4 30 27 35 38 27 1 10 27 39 0 -0.90 12 0 0 27 45 36 17 23 7.5 29 215 -13 27 30 1 28 1 15 27 26 40 28 4 38 -0.90 13 0 0 28 11 32 17 23 9.6 28 216 -14 27 55 53 28 27 14 27 52 32 28 30 38 -0.90 14 0 0 28 37 50 17 23 11.6 27 216 -15 28 22 8 28 53 35 28 18 46 28 57 0 -0.90 15 0 0 29 4 29 17 23 13.6 26 217 -16 28 48 44 29 20 18 28 45 22 29 23 43 -0.90 16 0 0 29 31 29 17 23 15.5 25 218 -17 29 15 41 29 47 21 29 12 17 29 50 47 -0.90 17 0 0 29 58 48 17 23 17.3 24 218 -18 29 42 57 30 14 44 29 39 33 30 18 10 -0.90 18 0 0 30 26 27 17 23 19.0 24 219 -19 30 10 32 30 42 25 30 7 7 30 45 52 -0.90 19 0 0 30 54 23 17 23 20.7 23 220 -20 30 38 26 31 10 25 30 35 0 31 13 53 -0.90 20 0 0 31 22 36 17 23 22.4 22 220 -21 31 6 36 31 38 41 31 3 10 31 42 10 -0.90 21 0 0 31 51 6 17 23 23.9 21 221 -22 31 35 2 32 7 14 31 31 35 32 10 43 -0.90 22 0 0 32 19 51 17 23 25.4 20 222 -22 32 3 44 32 36 3 32 0 17 32 39 32 -0.90 23 0 0 32 48 51 17 23 26.8 19 222 -23 32 32 41 33 5 5 32 29 13 33 8 36 -0.90 24 0 0 33 18 4 17 23 28.2 18 223 -24 33 1 51 33 34 22 32 58 22 33 37 53 -0.90 25 0 0 33 47 30 17 23 29.5 17 224 -25 33 31 14 34 3 50 33 27 44 34 7 22 -0.90 26 0 0 34 17 7 17 23 30.7 16 224 -26 34 0 48 34 33 30 33 57 18 34 37 3 -0.90 27 0 0 34 46 54 17 23 31.8 15 225 -27 34 30 32 35 3 21 34 27 2 35 6 54 -0.90 28 0 0 35 16 51 17 23 32.9 14 226 -28 35 0 27 35 33 21 34 56 55 35 36 54 -0.90 29 0 0 35 46 57 17 23 33.9 13 226 -28 35 30 29 36 3 29 35 26 57 36 7 3 -0.90 30 0 0 36 17 9 17 23 34.8 12 227 -29 36 0 39 36 33 44 35 57 7 36 37 19 -0.91 31 0 0 36 47 29 17 23 35.7 11 228 -30 36 30 56 37 4 6 36 27 23 37 7 42 -0.91 32 0 0 37 17 53 17 23 36.5 11 228 -31 37 1 18 37 34 34 36 57 44 37 38 10 -0.91 33 0 0 37 48 22 17 23 37.2 10 229 -31 37 31 44 38 5 5 37 28 10 38 8 42 -0.91 34 0 0 38 18 55 17 23 37.8 9 229 -32 38 2 14 38 35 40 37 58 40 38 39 17 -0.91 35 0 0 38 49 29 17 23 38.4 8 230 -33 38 32 47 39 6 17 38 29 11 39 9 55 -0.91 36 0 0 39 20 5 17 23 38.9 7 231 -34 39 3 20 39 36 55 38 59 45 39 40 33 -0.92 37 0 0 39 50 41 17 23 39.4 6 231 -34 39 33 54 40 7 33 39 30 18 40 11 12 -0.92 38 0 0 40 21 16 17 23 39.8 5 232 -35 40 4 27 40 38 10 40 0 50 40 41 49 -0.93 39 0 0 40 51 49 17 23 40.1 4 233 -36 40 34 58 41 8 45 40 31 21 41 12 25 -0.93 40 0 0 41 22 19 17 23 40.3 3 233 -36 41 5 26 41 39 17 41 1 49 41 42 57 -0.94 41 0 0 41 52 45 17 23 40.5 2 234 -37 41 35 51 42 9 45 41 32 13 42 13 25 -0.96 42 0 0 42 23 6 17 23 40.6 1 235 -38 42 6 10 42 40 7 42 2 32 42 43 47 -1.01 43 0 0 42 53 20 17 23 40.7 0 235 -38 42 36 23 43 10 23 42 32 44 43 14 4 -1.23 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6864-00858-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 54 01.1679 DE: -24 24 37.798 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 54 01.1679 DE: -24 24 37.798 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.9 * B mag [mag]: 11.9 * Diameter [mas]: 0.10 * 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]: 2.50240 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", 85.998° remarks: * orbital elements for (435)Ella : Mean anomaly = 321.6584572254 deg Arg. of pericenter = 333.4861887468 deg Long. of node = 23.1318725283 deg Inclination = 1.8158004120 deg Eccentricity = 0.1545967397 Semimajor axis = 2.4499589493 AU Perihelion dist = 2.0712032833 AU Mag: H = 10.40, G = 0.15 Epoch of elements : MJD 60618.72316154 TDT (2024 Nov 04.7232) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#952023Apr24,1.14,2024,11,4,17.355882,-0.076448,0.662524,19.062082,2.184494,0.004797,0.000386,-0.000001,0.000000 -20.9020,-24.3807,-84.44,-15.68,False TYC 6864-00858-1,18.90032448,-24.4104995,11.88,10.85,10.29,0.1,0,,18.92535212,-24.3806799,4.35,4.46,0,0,0 435,Ella,15.18,38.713,2.5024,0,0,4.904,7.68,,2.0,0 0,321.4726,2024,11,4,333.4862,23.1319,1.8158,0.15460,2.44996,2.07120,10.40,5.0,0.15 1.108,0.0140,0.0022,86,0.0023,Known errors,0.93,0,-1,-1 20241104_0858-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org