IOTA/IOTA-ES occultation update for (3078) Horrocks / TYC 6839-00011-1 event on 2024 Oct 01, 05:28 UT Visible from Summary ------- On 2024 Oct 01 UT, the 29.3182332706749 km diameter asteroid (3078) Horrocks will occult a 8.8 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.92 mag to 17.74 mag (the magnitude of the asteroid) for at most 1.280 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: 98 * date and approx. time of event: 2024 Oct 01, 05:24 - 2024 Oct 01, 05:32 * geocentric midpoint of event [JD]: 2460584.72819458 * magnitude of target star: 8.82 * magnitude drop [mag]: 8.92 * estimated maximum duration [s]: 1.280 * Moon: 2 % sunlit, 93° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.004", 94°) * approx speed of asteroid's shadow [km/s]: 23.3047 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6839-00011-1 by 3078 Horrocks on 2024 Oct 1 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 103 0 0 29 30 30 5 25 0.0 1 125 57 29 18 7 29 42 55 29 9 29 29 51 38 .... 104 0 0 28 54 2 5 25 0.2 2 126 57 28 41 43 29 6 25 28 33 6 29 15 6 -0.43 105 0 0 28 17 49 5 25 0.4 3 126 57 28 5 33 28 30 9 27 56 58 28 38 48 -0.55 106 0 0 27 41 52 5 25 0.8 4 127 58 27 29 38 27 54 8 27 21 6 28 2 45 -0.61 107 0 0 27 6 12 5 25 1.3 5 127 58 26 54 1 27 18 25 26 45 30 27 27 0 -0.64 108 0 0 26 30 50 5 25 1.9 6 128 58 26 18 42 26 43 0 26 10 14 26 51 32 -0.66 109 0 0 25 55 47 5 25 2.7 7 128 58 25 43 42 26 7 54 25 35 16 26 16 25 -0.68 110 0 0 25 21 5 5 25 3.5 8 129 58 25 9 3 25 33 9 25 0 39 25 41 37 -0.69 111 0 0 24 46 45 5 25 4.5 9 129 58 24 34 46 24 58 46 24 26 24 25 7 12 -0.70 112 0 0 24 12 47 5 25 5.6 10 130 58 24 0 52 24 24 45 23 52 32 24 33 9 -0.71 113 0 0 23 39 14 5 25 6.9 11 130 58 23 27 21 23 51 8 23 19 4 23 59 30 -0.71 114 0 0 23 6 5 5 25 8.2 13 130 58 22 54 16 23 17 57 22 46 1 23 26 16 -0.72 115 0 0 22 33 23 5 25 9.7 14 131 58 22 21 36 22 45 11 22 13 23 22 53 28 -0.72 116 0 0 22 1 7 5 25 11.2 15 131 58 21 49 24 22 12 52 21 41 13 22 21 7 -0.73 117 0 0 21 29 19 5 25 12.9 16 132 58 21 17 39 21 41 1 21 9 30 21 49 14 -0.73 118 0 0 20 58 0 5 25 14.8 17 132 58 20 46 23 21 9 39 20 38 16 21 17 50 -0.73 119 0 0 20 27 10 5 25 16.7 18 133 57 20 15 36 20 38 46 20 7 31 20 46 55 -0.73 120 0 0 19 56 50 5 25 18.7 19 133 57 19 45 19 20 8 23 19 37 17 20 16 30 -0.74 121 0 0 19 27 2 5 25 20.8 20 133 57 19 15 34 19 38 32 19 7 33 19 46 36 -0.74 122 0 0 18 57 45 5 25 23.1 21 134 56 18 46 20 19 9 12 18 38 22 19 17 14 -0.74 123 0 0 18 29 1 5 25 25.4 22 134 56 18 17 39 18 40 25 18 9 43 18 48 25 -0.74 124 0 0 18 0 50 5 25 27.9 23 135 55 17 49 31 18 12 11 17 41 36 18 20 9 -0.74 125 0 0 17 33 13 5 25 30.5 24 135 55 17 21 56 17 44 31 17 14 4 17 52 27 -0.75 126 0 0 17 6 10 5 25 33.1 25 136 54 16 54 56 17 17 25 16 47 5 17 25 19 -0.75 127 0 0 16 39 41 5 25 35.9 26 136 53 16 28 30 16 50 54 16 20 42 16 58 46 -0.75 128 0 0 16 13 49 5 25 38.7 27 137 53 16 2 40 16 24 59 15 54 54 16 32 49 -0.75 129 0 0 15 48 32 5 25 41.7 28 137 52 15 37 26 15 59 39 15 29 41 16 7 27 -0.75 130 0 0 15 23 51 5 25 44.7 29 138 51 15 12 48 15 34 56 15 5 5 15 42 42 -0.75 131 0 0 14 59 47 5 25 47.8 30 138 51 14 48 47 15 10 49 14 41 5 15 18 34 -0.75 132 0 0 14 36 20 5 25 51.0 31 139 50 14 25 22 14 47 20 14 17 43 14 55 3 -0.76 133 0 0 14 13 31 5 25 54.3 32 139 49 14 2 35 14 24 28 13 54 57 14 32 9 -0.76 134 0 0 13 51 19 5 25 57.7 33 140 48 13 40 26 14 2 14 13 32 50 14 9 53 -0.76 135 0 0 13 29 46 5 26 1.2 33 140 48 13 18 55 13 40 38 13 11 20 13 48 16 -0.76 136 0 0 13 8 51 5 26 4.7 34 141 47 12 58 2 13 19 41 12 50 29 13 27 17 -0.76 137 0 0 12 48 35 5 26 8.3 35 142 46 12 37 48 12 59 23 12 30 17 13 6 57 -0.76 138 0 0 12 28 57 5 26 12.0 36 142 45 12 18 13 12 39 43 12 10 43 12 47 16 -0.76 139 0 0 12 9 59 5 26 15.7 37 143 44 11 59 17 12 20 43 11 51 49 12 28 15 -0.76 140 0 0 11 51 41 5 26 19.5 38 144 44 11 41 1 12 2 23 11 33 33 12 9 53 -0.76 141 0 0 11 34 2 5 26 23.4 39 144 43 11 23 24 11 44 42 11 15 58 11 52 11 -0.76 142 0 0 11 17 3 5 26 27.3 39 145 42 11 6 27 11 27 41 10 59 2 11 35 8 -0.76 143 0 0 11 0 44 5 26 31.3 40 146 41 10 50 9 11 11 20 10 42 46 11 18 46 -0.76 144 0 0 10 45 4 5 26 35.4 41 147 40 10 34 32 10 55 39 10 27 9 11 3 4 -0.77 145 0 0 10 30 5 5 26 39.5 42 147 39 10 19 34 10 40 38 10 12 13 10 48 2 -0.77 146 0 0 10 15 47 5 26 43.7 42 148 38 10 5 17 10 26 18 9 57 57 10 33 41 -0.77 147 0 0 10 2 9 5 26 47.9 43 149 37 9 51 41 10 12 39 9 44 22 10 20 0 -0.77 148 0 0 9 49 11 5 26 52.2 44 150 36 9 38 45 9 59 40 9 31 27 10 7 0 -0.77 149 0 0 9 36 55 5 26 56.5 45 151 35 9 26 29 9 47 22 9 19 13 9 54 41 -0.77 150 0 0 9 25 19 5 27 0.9 45 152 34 9 14 55 9 35 44 9 7 39 9 43 3 -0.77 151 0 0 9 14 24 5 27 5.3 46 153 33 9 4 1 9 24 48 8 56 46 9 32 6 -0.77 152 0 0 9 4 9 5 27 9.7 46 154 32 8 53 48 9 14 32 8 46 33 9 21 50 -0.77 153 0 0 8 54 36 5 27 14.2 47 155 31 8 44 15 9 4 58 8 37 2 9 12 15 -0.77 154 0 0 8 45 44 5 27 18.7 48 156 31 8 35 24 8 56 5 8 28 11 9 3 21 -0.77 155 0 0 8 37 32 5 27 23.3 48 157 30 8 27 14 8 47 53 8 20 1 8 55 8 -0.77 156 0 0 8 30 2 5 27 27.9 49 158 29 8 19 44 8 40 22 8 12 33 8 47 36 -0.77 157 0 0 8 23 13 5 27 32.5 49 159 28 8 12 56 8 33 32 8 5 45 8 40 46 -0.77 158 0 0 8 17 5 5 27 37.1 49 161 27 8 6 49 8 27 23 7 59 38 8 34 37 -0.77 159 0 0 8 11 39 5 27 41.8 50 162 26 8 1 23 8 21 56 7 54 12 8 29 9 -0.77 160 0 0 8 6 53 5 27 46.5 50 163 25 7 56 38 8 17 10 7 49 28 8 24 23 -0.77 161 0 0 8 2 49 5 27 51.2 51 164 24 7 52 34 8 13 5 7 45 24 8 20 18 -0.77 162 0 0 7 59 26 5 27 55.9 51 166 23 7 49 12 8 9 42 7 42 2 8 16 54 -0.77 163 0 0 7 56 44 5 28 0.7 51 167 22 7 46 30 8 7 0 7 39 21 8 14 12 -0.77 164 0 0 7 54 44 5 28 5.5 51 169 21 7 44 30 8 4 59 7 37 21 8 12 11 -0.78 165 0 0 7 53 25 5 28 10.3 52 170 20 7 43 11 8 3 40 7 36 2 8 10 52 -0.78 166 0 0 7 52 47 5 28 15.1 52 171 19 7 42 33 8 3 2 7 35 24 8 10 14 -0.78 167 0 0 7 52 50 5 28 19.9 52 173 18 7 42 37 8 3 6 7 35 28 8 10 17 -0.78 168 0 0 7 53 35 5 28 24.7 52 174 17 7 43 21 8 3 50 7 36 12 8 11 2 -0.78 169 0 0 7 55 1 5 28 29.5 52 176 16 7 44 47 8 5 17 7 37 38 8 12 28 -0.78 170 0 0 7 57 8 5 28 34.3 52 177 15 7 46 54 8 7 24 7 39 45 8 14 36 -0.78 171 0 0 7 59 57 5 28 39.2 52 178 14 7 49 42 8 10 13 7 42 33 8 17 25 -0.78 172 0 0 8 3 27 5 28 44.0 52 180 13 7 53 12 8 13 44 7 46 2 8 20 56 -0.78 173 0 0 8 7 38 5 28 48.8 52 181 12 7 57 23 8 17 55 7 50 13 8 25 8 -0.78 174 0 0 8 12 31 5 28 53.7 52 183 11 8 2 15 8 22 49 7 55 4 8 30 2 -0.78 175 0 0 8 18 5 5 28 58.5 52 184 10 8 7 48 8 28 23 8 0 37 8 35 37 -0.78 176 0 0 8 24 20 5 29 3.3 52 186 9 8 14 3 8 34 39 8 6 51 8 41 53 -0.78 177 0 0 8 31 16 5 29 8.1 51 187 8 8 20 58 8 41 36 8 13 46 8 48 51 -0.78 178 0 0 8 38 54 5 29 12.9 51 188 6 8 28 35 8 49 15 8 21 22 8 56 30 -0.78 179 0 0 8 47 13 5 29 17.7 51 190 5 8 36 53 8 57 34 8 29 40 9 4 50 -0.78 180 0 0 8 56 13 5 29 22.4 50 191 4 8 45 52 9 6 35 8 38 38 9 13 52 -0.78 -179 0 0 9 5 54 5 29 27.2 50 192 3 8 55 32 9 16 17 8 48 17 9 23 35 -0.78 -178 0 0 9 16 16 5 29 31.9 50 194 2 9 5 53 9 26 41 8 58 37 9 33 59 -0.78 -177 0 0 9 27 19 5 29 36.6 49 195 1 9 16 55 9 37 45 9 9 38 9 45 4 -0.78 -176 0 0 9 39 3 5 29 41.3 49 196 0 9 28 38 9 49 31 9 21 20 9 56 51 -0.78 -175 0 0 9 51 28 5 29 45.9 48 197 -1 9 41 1 10 1 57 9 33 43 10 9 18 -0.78 -174 0 0 10 4 34 5 29 50.6 48 198 -2 9 54 6 10 15 5 9 46 46 10 22 27 -0.78 -173 0 0 10 18 21 5 29 55.1 47 200 -3 10 7 51 10 28 53 10 0 30 10 36 16 -0.78 -172 0 0 10 32 48 5 29 59.7 47 201 -4 10 22 16 10 43 22 10 14 55 10 50 46 -0.78 -171 0 0 10 47 56 5 30 4.2 46 202 -5 10 37 23 10 58 31 10 30 0 11 5 57 -0.78 -170 0 0 11 3 44 5 30 8.7 45 203 -6 10 53 9 11 14 21 10 45 45 11 21 48 -0.78 -169 0 0 11 20 13 5 30 13.2 45 204 -7 11 9 36 11 30 52 11 2 11 11 38 20 -0.78 -168 0 0 11 37 22 5 30 17.6 44 205 -8 11 26 43 11 48 2 11 19 16 11 55 32 -0.78 -167 0 0 11 55 10 5 30 21.9 43 206 -9 11 44 29 12 5 53 11 37 2 12 13 24 -0.78 -166 0 0 12 13 39 5 30 26.2 43 207 -10 12 2 56 12 24 24 11 55 27 12 31 56 -0.78 -165 0 0 12 32 47 5 30 30.5 42 208 -11 12 22 2 12 43 34 12 14 31 12 51 8 -0.78 -164 0 0 12 52 35 5 30 34.7 41 208 -12 12 41 48 13 3 24 12 34 15 13 10 59 -0.78 -163 0 0 13 13 2 5 30 38.8 40 209 -13 13 2 12 13 23 53 12 54 38 13 31 30 -0.78 -162 0 0 13 34 7 5 30 42.9 40 210 -14 13 23 16 13 45 1 13 15 40 13 52 39 -0.78 -161 0 0 13 55 52 5 30 46.9 39 211 -15 13 44 58 14 6 48 13 37 21 14 14 28 -0.78 -160 0 0 14 18 15 5 30 50.9 38 212 -16 14 7 18 14 29 13 13 59 39 14 36 55 -0.78 -159 0 0 14 41 15 5 30 54.8 37 212 -17 14 30 16 14 52 16 14 22 36 15 0 0 -0.78 -158 0 0 15 4 54 5 30 58.6 36 213 -18 14 53 52 15 15 57 14 46 10 15 23 43 -0.78 -157 0 0 15 29 10 5 31 2.4 35 214 -19 15 18 5 15 40 16 15 10 22 15 48 3 -0.78 -156 0 0 15 54 2 5 31 6.0 35 215 -20 15 42 56 16 5 11 15 35 10 16 13 0 -0.78 -155 0 0 16 19 32 5 31 9.7 34 215 -21 16 8 22 16 30 43 16 0 34 16 38 34 -0.78 -154 0 0 16 45 37 5 31 13.2 33 216 -21 16 34 25 16 56 51 16 26 35 17 4 44 -0.78 -153 0 0 17 12 18 5 31 16.6 32 216 -22 17 1 3 17 23 35 16 53 11 17 31 30 -0.78 -152 0 0 17 39 33 5 31 20.0 31 217 -23 17 28 16 17 50 53 17 20 22 17 58 50 -0.78 -151 0 0 18 7 24 5 31 23.3 30 218 -24 17 56 3 18 18 46 17 48 8 18 26 45 -0.78 -150 0 0 18 35 48 5 31 26.4 29 218 -25 18 24 24 18 47 14 18 16 27 18 55 15 -0.78 -149 0 0 19 4 45 5 31 29.5 28 219 -26 18 53 19 19 16 14 18 45 19 19 24 17 -0.78 -148 0 0 19 34 15 5 31 32.5 27 219 -27 19 22 46 19 45 47 19 14 44 19 53 52 -0.78 -147 0 0 20 4 17 5 31 35.4 26 220 -28 19 52 45 20 15 52 19 44 41 20 23 59 -0.78 -146 0 0 20 34 50 5 31 38.2 25 220 -29 20 23 15 20 46 28 20 15 9 20 54 38 -0.78 -145 0 0 21 5 54 5 31 40.9 24 221 -30 20 54 15 21 17 34 20 46 7 21 25 46 -0.78 -144 0 0 21 37 27 5 31 43.5 23 222 -30 21 25 45 21 49 11 21 17 35 21 57 25 -0.78 -143 0 0 22 9 28 5 31 46.0 22 222 -31 21 57 44 22 21 15 21 49 31 22 29 32 -0.78 -142 0 0 22 41 58 5 31 48.4 21 223 -32 22 30 10 22 53 48 22 21 56 23 2 6 -0.78 -141 0 0 23 14 54 5 31 50.7 20 223 -33 23 3 3 23 26 48 22 54 47 23 35 8 -0.78 -140 0 0 23 48 17 5 31 52.8 19 224 -34 23 36 22 24 0 13 23 28 4 24 8 36 -0.78 -139 0 0 24 22 4 5 31 54.9 18 224 -35 24 10 6 24 34 3 24 1 46 24 42 28 -0.78 -138 0 0 24 56 15 5 31 56.8 17 225 -35 24 44 14 25 8 18 24 35 51 25 16 45 -0.78 -137 0 0 25 30 49 5 31 58.6 16 225 -36 25 18 45 25 42 54 25 10 20 25 51 24 -0.78 -136 0 0 26 5 44 5 32 0.3 15 226 -37 25 53 38 26 17 53 25 45 10 26 26 25 -0.78 -135 0 0 26 41 0 5 32 1.9 14 226 -37 26 28 50 26 53 12 26 20 21 27 1 46 -0.78 -134 0 0 27 16 35 5 32 3.4 13 227 -38 27 4 23 27 28 50 26 55 51 27 37 27 -0.78 -133 0 0 27 52 29 5 32 4.7 12 227 -39 27 40 13 28 4 47 27 31 39 28 13 25 -0.78 -132 0 0 28 28 39 5 32 6.0 10 228 -39 28 16 20 28 41 0 28 7 44 28 49 40 -0.78 -131 0 0 29 5 4 5 32 7.1 9 228 -40 28 52 43 29 17 28 28 44 5 29 26 11 -0.78 -130 0 0 29 41 44 5 32 8.0 8 229 -41 29 29 19 29 54 11 29 20 40 30 2 55 -0.79 -129 0 0 30 18 36 5 32 8.9 7 229 -41 30 6 9 30 31 6 29 57 27 30 39 53 -0.79 -128 0 0 30 55 40 5 32 9.7 6 230 -42 30 43 10 31 8 13 30 34 26 31 17 1 -0.79 -127 0 0 31 32 54 5 32 10.3 5 230 -42 31 20 21 31 45 30 31 11 36 31 54 20 -0.80 -126 0 0 32 10 17 5 32 10.8 4 231 -43 31 57 41 32 22 55 31 48 54 32 31 47 -0.81 -125 0 0 32 47 46 5 32 11.2 3 231 -43 32 35 8 33 0 27 32 26 19 33 9 21 -0.82 -124 0 0 33 25 22 5 32 11.5 2 232 -43 33 12 41 33 38 5 33 3 50 33 47 1 -0.85 -123 0 0 34 3 1 5 32 11.6 1 232 -44 33 50 18 34 15 47 33 41 26 34 24 45 -0.93 -122 0 0 .. .. .... .. .. .. .. .. .. 34 27 59 .. .. .. 34 19 4 .. .. .. .... Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6839-00011-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 37 11.7482 DE: -29 51 50.401 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 37 11.7480 DE: -29 51 50.401 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 8.8 * B mag [mag]: 9.5 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3078) Horrocks asteroid class: approx. diameter [km]: 29 approx. diameter ["]: 0.012 distance from Earth [AU]: 3.30750 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): 0.015", 0.004", 93.599° remarks: * orbital elements for (3078)Horrocks : Mean anomaly = 98.7872427388 deg Arg. of pericenter = 140.0912488622 deg Long. of node = 32.3759874466 deg Inclination = 7.0864701886 deg Eccentricity = 0.1051553244 Semimajor axis = 3.1480421777 AU Perihelion dist = 2.8170087812 AU Mag: H = 11.67, G = 0.15 Epoch of elements : MJD 60584.22819442 TDT (2024 Oct 01.2282) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,1.28,2024,10,1,5.476670,-0.030243,0.612573,13.137219,0.660149,0.005699,-0.000363,0.000000,0.000000 172.0979,-29.8804,95.25,-3.39,False TYC 6839-00011-1,17.61993010,-29.8640004,9.50,8.82,8.45,0.2,0,,17.64615495,-29.8804461,8.92,8.83,0,0,0 3078,Horrocks,17.74,29.798,3.3075,0,0,2.685,1.76,,1.4,0 0,98.7470,2024,10,1,140.0912,32.3760,7.0865,0.10516,3.14804,2.81701,11.67,5.0,0.15 1.350,0.0153,0.0040,94,0.0043,Known errors,0.85,0,-1,-1 20241001_0011-1,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org