IOTA/IOTA-ES occultation update for (2308) Schilt / UCAC4 343-079589 event on 2024 Jan 29, 22:55 UT Visible from Summary ------- On 2024 Jan 29 UT, the 17.66 km diameter asteroid (2308) Schilt will occult a 11.9 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.93 mag to 16.81 mag (the magnitude of the asteroid) for at most 0.550 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 Jan 29, 22:52 - 2024 Jan 29, 22:57 * geocentric midpoint of event [JD]: 2460339.45508409 * magnitude of target star: 11.89 * magnitude drop [mag]: 4.93 * estimated maximum duration [s]: 0.550 * Moon: 84 % sunlit, 67° distance * Sun: 67° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 115°) * approx speed of asteroid's shadow [km/s]: 32.2670 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 343-079589 by 2308 Schilt on 2024 Jan 29 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 73 0 0 54 10 56 22 52 48.0 1 130 -36 54 2 54 54 18 58 53 59 27 54 22 27 .... 74 0 0 53 41 37 22 52 48.1 1 131 -35 53 33 34 53 49 41 53 30 6 53 53 10 -0.44 75 0 0 53 11 47 22 52 48.2 2 132 -35 53 3 43 53 19 52 53 0 15 53 23 21 -0.58 76 0 0 52 41 26 22 52 48.3 3 132 -35 52 33 21 52 49 32 52 29 52 52 53 2 -0.64 77 0 0 52 10 35 22 52 48.5 4 133 -34 52 2 29 52 18 42 51 59 0 52 22 12 -0.68 78 0 0 51 39 13 22 52 48.8 5 134 -34 51 31 7 51 47 21 51 27 37 51 50 52 -0.71 79 0 0 51 7 23 22 52 49.1 5 135 -33 50 59 16 51 15 32 50 55 46 51 19 3 -0.72 80 0 0 50 35 4 22 52 49.5 6 135 -33 50 26 56 50 43 13 50 23 26 50 46 45 -0.74 81 0 0 50 2 17 22 52 49.9 7 136 -32 49 54 8 50 10 27 49 50 38 50 13 58 -0.75 82 0 0 49 29 3 22 52 50.4 8 137 -32 49 20 53 49 37 13 49 17 23 49 40 45 -0.76 83 0 0 48 55 22 22 52 51.0 9 138 -31 48 47 12 49 3 32 48 43 42 49 7 4 -0.76 84 0 0 48 21 16 22 52 51.6 10 139 -30 48 13 6 48 29 26 48 9 35 48 32 58 -0.77 85 0 0 47 46 45 22 52 52.3 10 139 -30 47 38 35 47 54 56 47 35 4 47 58 28 -0.77 86 0 0 47 11 50 22 52 53.0 11 140 -29 47 3 40 47 20 1 47 0 10 47 23 33 -0.78 87 0 0 46 36 33 22 52 53.9 12 141 -29 46 28 24 46 44 44 46 24 53 46 48 16 -0.78 88 0 0 46 0 55 22 52 54.7 13 142 -28 45 52 45 46 9 6 45 49 15 46 12 37 -0.78 89 0 0 45 24 56 22 52 55.7 14 142 -27 45 16 47 45 33 6 45 13 17 45 36 38 -0.79 90 0 0 44 48 38 22 52 56.8 15 143 -27 44 40 30 44 56 48 44 36 59 45 0 20 -0.79 91 0 0 44 12 3 22 52 57.9 16 144 -26 44 3 55 44 20 12 44 0 25 44 23 43 -0.79 92 0 0 43 35 11 22 52 59.1 17 145 -25 43 27 3 43 43 20 43 23 34 43 46 51 -0.79 93 0 0 42 58 4 22 53 0.4 18 145 -24 42 49 57 43 6 12 42 46 28 43 9 43 -0.80 94 0 0 42 20 43 22 53 1.7 19 146 -24 42 12 37 42 28 51 42 9 8 42 32 21 -0.80 95 0 0 41 43 11 22 53 3.1 20 147 -23 41 35 6 41 51 17 41 31 37 41 54 47 -0.80 96 0 0 41 5 27 22 53 4.6 21 148 -22 40 57 23 41 13 32 40 53 55 41 17 2 -0.80 97 0 0 40 27 34 22 53 6.2 21 149 -21 40 19 31 40 35 39 40 16 4 40 39 8 -0.80 98 0 0 39 49 34 22 53 7.9 22 149 -20 39 41 32 39 57 37 39 38 5 40 1 5 -0.80 99 0 0 39 11 27 22 53 9.7 23 150 -19 39 3 27 39 19 29 39 0 0 39 22 57 -0.80 100 0 0 38 33 16 22 53 11.5 24 151 -19 38 25 17 38 41 17 38 21 51 38 44 44 -0.81 101 0 0 37 55 2 22 53 13.4 25 152 -18 37 47 5 38 3 1 37 43 39 38 6 28 -0.81 102 0 0 37 16 47 22 53 15.4 26 153 -17 37 8 51 37 24 44 37 5 26 37 28 11 -0.81 103 0 0 36 38 32 22 53 17.4 27 153 -16 36 30 37 36 46 28 36 27 13 36 49 53 -0.81 104 0 0 36 0 19 22 53 19.6 28 154 -15 35 52 26 36 8 13 35 49 2 36 11 38 -0.81 105 0 0 35 22 9 22 53 21.8 29 155 -14 35 14 18 35 30 1 35 10 55 35 33 25 -0.81 106 0 0 34 44 4 22 53 24.1 30 156 -13 34 36 15 34 51 55 34 32 53 34 55 18 -0.81 107 0 0 34 6 6 22 53 26.5 31 157 -12 33 58 18 34 13 55 33 54 57 34 17 17 -0.81 108 0 0 33 28 16 22 53 28.9 32 158 -11 33 20 30 33 36 3 33 17 10 33 39 24 -0.81 109 0 0 32 50 35 22 53 31.4 33 159 -10 32 42 51 32 58 20 32 39 32 33 1 41 -0.81 110 0 0 32 13 6 22 53 34.0 33 159 -9 32 5 24 32 20 49 32 2 5 32 24 9 -0.82 111 0 0 31 35 49 22 53 36.7 34 160 -8 31 28 9 31 43 30 31 24 51 31 46 49 -0.82 112 0 0 30 58 46 22 53 39.4 35 161 -7 30 51 8 31 6 25 30 47 51 31 9 44 -0.82 113 0 0 30 21 59 22 53 42.2 36 162 -6 30 14 23 30 29 36 30 11 7 30 32 53 -0.82 114 0 0 29 45 29 22 53 45.0 37 163 -5 29 37 55 29 53 4 29 34 39 29 56 20 -0.82 115 0 0 29 9 17 22 53 47.9 38 164 -4 29 1 45 29 16 49 28 58 30 29 20 5 -0.82 116 0 0 28 33 24 22 53 50.9 39 165 -3 28 25 54 28 40 55 28 22 41 28 44 9 -0.82 117 0 0 27 57 52 22 53 53.9 39 166 -2 27 50 24 28 5 21 27 47 12 28 8 35 -0.82 118 0 0 27 22 42 22 53 57.0 40 167 -1 27 15 17 27 30 9 27 12 5 27 33 22 -0.82 119 0 0 26 47 56 22 54 0.1 41 169 0 26 40 32 26 55 20 26 37 22 26 58 32 -0.82 120 0 0 26 13 34 22 54 3.3 42 170 1 26 6 12 26 20 56 26 3 2 26 24 7 -0.82 121 0 0 25 39 37 22 54 6.5 42 171 2 25 32 18 25 46 57 25 29 9 25 50 7 -0.82 122 0 0 25 6 7 22 54 9.8 43 172 3 24 58 50 25 13 25 24 55 42 25 16 34 -0.82 123 0 0 24 33 5 22 54 13.1 44 173 4 24 25 50 24 40 21 24 22 42 24 43 29 -0.82 124 0 0 24 0 31 22 54 16.4 44 175 5 23 53 18 24 7 45 23 50 11 24 10 52 -0.83 125 0 0 23 28 26 22 54 19.8 45 176 6 23 21 15 23 35 38 23 18 10 23 38 44 -0.83 126 0 0 22 56 52 22 54 23.2 45 177 7 22 49 43 23 4 2 22 46 39 23 7 7 -0.83 127 0 0 22 25 49 22 54 26.6 46 178 8 22 18 42 22 32 56 22 15 38 22 36 1 -0.83 128 0 0 21 55 18 22 54 30.1 47 180 9 21 48 13 22 2 23 21 45 10 22 5 27 -0.83 129 0 0 21 25 19 22 54 33.6 47 181 11 21 18 17 21 32 23 21 15 15 21 35 26 -0.83 130 0 0 20 55 54 22 54 37.1 47 183 12 20 48 54 21 2 56 20 45 53 21 5 58 -0.83 131 0 0 20 27 4 22 54 40.6 48 184 13 20 20 5 20 34 3 20 17 4 20 37 4 -0.83 132 0 0 19 58 47 22 54 44.2 48 186 14 19 51 51 20 5 45 19 48 51 20 8 45 -0.83 133 0 0 19 31 7 22 54 47.8 49 187 15 19 24 12 19 38 2 19 21 13 19 41 2 -0.83 134 0 0 19 4 2 22 54 51.3 49 188 16 18 57 8 19 10 56 18 54 11 19 13 54 -0.83 135 0 0 18 37 33 22 54 54.9 49 190 17 18 30 42 18 44 25 18 27 45 18 47 23 -0.83 136 0 0 18 11 41 22 54 58.5 49 192 18 18 4 52 18 18 32 18 1 56 18 21 29 -0.83 137 0 0 17 46 27 22 55 2.1 50 193 19 17 39 39 17 53 15 17 36 44 17 56 12 -0.83 138 0 0 17 21 50 22 55 5.7 50 195 20 17 15 4 17 28 37 17 12 9 17 31 33 -0.83 139 0 0 16 57 52 22 55 9.3 50 196 21 16 51 7 17 4 37 16 48 13 17 7 32 -0.83 140 0 0 16 34 32 22 55 12.9 50 198 22 16 27 49 16 41 15 16 24 56 16 44 9 -0.83 141 0 0 16 11 50 22 55 16.5 50 199 23 16 5 9 16 18 32 16 2 17 16 21 26 -0.83 142 0 0 15 49 48 22 55 20.1 50 201 24 15 43 9 15 56 29 15 40 17 15 59 21 -0.83 143 0 0 15 28 26 22 55 23.7 50 202 25 15 21 48 15 35 4 15 18 56 15 37 56 -0.84 144 0 0 15 7 42 22 55 27.3 50 204 26 15 1 6 15 14 20 14 58 15 15 17 11 -0.84 145 0 0 14 47 39 22 55 30.9 50 205 27 14 41 4 14 54 15 14 38 14 14 57 6 -0.84 146 0 0 14 28 16 22 55 34.4 50 207 28 14 21 43 14 34 51 14 18 53 14 37 41 -0.84 147 0 0 14 9 34 22 55 37.9 50 208 29 14 3 1 14 16 7 14 0 12 14 18 57 -0.84 148 0 0 13 51 31 22 55 41.5 49 210 30 13 45 0 13 58 3 13 42 12 14 0 52 -0.84 149 0 0 13 34 9 22 55 45.0 49 211 31 13 27 39 13 40 40 13 24 51 13 43 28 -0.84 150 0 0 13 17 28 22 55 48.4 49 212 32 13 10 59 13 23 57 13 8 12 13 26 45 -0.84 151 0 0 13 1 28 22 55 51.9 49 214 33 12 55 0 13 7 56 12 52 13 13 10 43 -0.84 152 0 0 12 46 9 22 55 55.3 48 215 34 12 39 42 12 52 36 12 36 56 12 55 23 -0.84 153 0 0 12 31 30 22 55 58.7 48 216 35 12 25 5 12 37 56 12 22 19 12 40 43 -0.84 154 0 0 12 17 33 22 56 2.1 47 217 36 12 11 9 12 23 58 12 8 23 12 26 44 -0.84 155 0 0 12 4 17 22 56 5.5 47 219 37 11 57 54 12 10 41 11 55 9 12 13 27 -0.84 156 0 0 11 51 42 22 56 8.8 47 220 38 11 45 20 11 58 5 11 42 35 12 0 51 -0.84 157 0 0 11 39 49 22 56 12.1 46 221 39 11 33 27 11 46 11 11 30 43 11 48 56 -0.84 158 0 0 11 28 37 22 56 15.3 46 222 40 11 22 16 11 34 58 11 19 32 11 37 43 -0.84 159 0 0 11 18 6 22 56 18.5 45 223 41 11 11 46 11 24 26 11 9 2 11 27 11 -0.84 160 0 0 11 8 16 22 56 21.7 44 224 42 11 1 57 11 14 36 10 59 14 11 17 20 -0.84 161 0 0 10 59 8 22 56 24.9 44 225 43 10 52 50 11 5 28 10 50 7 11 8 11 -0.84 162 0 0 10 50 42 22 56 28.0 43 226 43 10 44 24 10 57 0 10 41 41 10 59 44 -0.84 163 0 0 10 42 57 22 56 31.0 43 227 44 10 36 39 10 49 15 10 33 57 10 51 58 -0.84 164 0 0 10 35 53 22 56 34.1 42 228 45 10 29 36 10 42 10 10 26 54 10 44 53 -0.84 165 0 0 10 29 31 22 56 37.1 41 229 46 10 23 14 10 35 48 10 20 32 10 38 30 -0.84 166 0 0 10 23 50 22 56 40.0 41 230 47 10 17 34 10 30 6 10 14 52 10 32 49 -0.84 167 0 0 10 18 50 22 56 42.9 40 230 48 10 12 35 10 25 6 10 9 53 10 27 49 -0.84 168 0 0 10 14 32 22 56 45.7 39 231 48 10 8 17 10 20 48 10 5 35 10 23 30 -0.84 169 0 0 10 10 56 22 56 48.6 38 232 49 10 4 41 10 17 11 10 1 59 10 19 53 -0.84 170 0 0 10 8 0 22 56 51.3 38 232 50 10 1 45 10 14 15 9 59 4 10 16 57 -0.84 171 0 0 10 5 46 22 56 54.0 37 233 51 9 59 32 10 12 1 9 56 50 10 14 43 -0.84 172 0 0 10 4 14 22 56 56.7 36 234 51 9 57 59 10 10 29 9 55 18 10 13 10 -0.84 173 0 0 10 3 22 22 56 59.3 35 234 52 9 57 8 10 9 37 9 54 27 10 12 19 -0.84 174 0 0 10 3 12 22 57 1.8 34 235 53 9 56 58 10 9 27 9 54 17 10 12 9 -0.84 175 0 0 10 3 43 22 57 4.4 34 235 53 9 57 29 10 9 58 9 54 48 10 12 40 -0.84 176 0 0 10 4 56 22 57 6.8 33 236 54 9 58 41 10 11 11 9 56 0 10 13 52 -0.84 177 0 0 10 6 49 22 57 9.2 32 236 55 10 0 35 10 13 4 9 57 54 10 15 46 -0.84 178 0 0 10 9 24 22 57 11.5 31 237 55 10 3 9 10 15 39 10 0 28 10 18 21 -0.84 179 0 0 10 12 40 22 57 13.8 30 237 56 10 6 25 10 18 55 10 3 44 10 21 37 -0.84 180 0 0 10 16 37 22 57 16.0 29 238 56 10 10 22 10 22 52 10 7 40 10 25 34 -0.84 -179 0 0 10 21 15 22 57 18.2 28 238 57 10 14 59 10 27 31 10 12 18 10 30 13 -0.84 -178 0 0 10 26 34 22 57 20.3 28 239 57 10 20 18 10 32 50 10 17 36 10 35 32 -0.84 -177 0 0 10 32 34 22 57 22.3 27 239 58 10 26 18 10 38 50 10 23 36 10 41 33 -0.84 -176 0 0 10 39 15 22 57 24.3 26 240 58 10 32 58 10 45 32 10 30 16 10 48 15 -0.84 -175 0 0 10 46 36 22 57 26.2 25 240 58 10 40 19 10 52 54 10 37 37 10 55 37 -0.84 -174 0 0 10 54 39 22 57 28.1 24 240 59 10 48 21 11 0 57 10 45 39 11 3 40 -0.85 -173 0 0 11 3 22 22 57 29.9 23 241 59 10 57 4 11 9 41 10 54 21 11 12 25 -0.85 -172 0 0 11 12 46 22 57 31.6 22 241 59 11 6 28 11 19 6 11 3 44 11 21 50 -0.85 -171 0 0 11 22 51 22 57 33.3 21 241 59 11 16 32 11 29 11 11 13 48 11 31 55 -0.85 -170 0 0 11 33 36 22 57 34.9 20 242 59 11 27 16 11 39 57 11 24 32 11 42 41 -0.85 -169 0 0 11 45 2 22 57 36.4 19 242 59 11 38 41 11 51 24 11 35 57 11 54 8 -0.85 -168 0 0 11 57 8 22 57 37.8 18 242 59 11 50 46 12 3 31 11 48 2 12 6 16 -0.85 -167 0 0 12 9 55 22 57 39.2 17 243 59 12 3 32 12 16 18 12 0 47 12 19 3 -0.85 -166 0 0 12 23 21 22 57 40.5 16 243 59 12 16 58 12 29 46 12 14 13 12 32 31 -0.85 -165 0 0 12 37 28 22 57 41.7 15 243 59 12 31 3 12 43 53 12 28 18 12 46 40 -0.85 -164 0 0 12 52 15 22 57 42.9 14 243 59 12 45 49 12 58 41 12 43 3 13 1 28 -0.85 -163 0 0 13 7 42 22 57 44.0 13 244 59 13 1 15 13 14 9 12 58 28 13 16 56 -0.85 -162 0 0 13 23 48 22 57 45.0 12 244 59 13 17 20 13 30 16 13 14 33 13 33 4 -0.85 -161 0 0 13 40 34 22 57 45.9 11 244 59 13 34 5 13 47 3 13 31 17 13 49 51 -0.86 -160 0 0 13 57 59 22 57 46.8 10 244 58 13 51 29 14 4 30 13 48 41 14 7 18 -0.86 -159 0 0 14 16 4 22 57 47.6 9 245 58 14 9 32 14 22 36 14 6 44 14 25 25 -0.86 -158 0 0 14 34 47 22 57 48.3 8 245 57 14 28 15 14 41 20 14 25 26 14 44 10 -0.86 -157 0 0 14 54 10 22 57 48.9 7 245 57 14 47 36 15 0 44 14 44 46 15 3 34 -0.87 -156 0 0 15 14 10 22 57 49.4 6 246 57 15 7 35 15 20 46 15 4 45 15 23 37 -0.87 -155 0 0 15 34 50 22 57 49.9 5 246 56 15 28 13 15 41 27 15 25 22 15 44 19 -0.88 -154 0 0 15 56 7 22 57 50.3 4 246 56 15 49 29 16 2 46 15 46 37 16 5 38 -0.89 -153 0 0 16 18 2 22 57 50.6 3 246 55 16 11 22 16 24 42 16 8 30 16 27 35 -0.91 -152 0 0 16 40 35 22 57 50.8 2 247 54 16 33 53 16 47 17 16 31 1 16 50 10 -0.95 -151 0 0 17 3 44 22 57 50.9 1 247 54 16 57 2 17 10 28 16 54 8 17 13 22 -1.06 -150 0 0 17 27 31 22 57 51.0 0 247 53 17 20 47 17 34 16 17 17 53 17 37 11 -2.76 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 343-079589 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 00 18.6401 DE: -21 34 04.089 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 00 18.6402 DE: -21 34 04.090 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2308) Schilt asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.010 distance from Earth [AU]: 2.41790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.016", 0.002", 115.146° remarks: * orbital elements for (2308)Schilt : Mean anomaly = 324.6224725690 deg Arg. of pericenter = 233.3011175589 deg Long. of node = 34.2040695755 deg Inclination = 14.1747820043 deg Eccentricity = 0.1719915863 Semimajor axis = 2.5493113218 AU Perihelion dist = 2.1108512235 AU Mag: H = 12.03, G = 0.15 Epoch of elements : MJD 60338.95508412 TDT (2024 Jan 29.9551) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.55,2024,1,29,22.922018,0.230322,0.597626,16.994324,-6.548626,-0.005092,0.000981,-0.000001,0.000000 127.9068,-21.6356,-160.56,-17.87,False UCAC4 343-079589,16.00517776,-21.5678024,12.47,11.89,11.58,0.0,0,,16.02854217,-21.6356160,4.93,4.79,0,0,0 2308,Schilt,16.81,17.660,2.4179,0,0,4.433,-23.82,,1.2,0 0,324.3912,2024,1,29,233.3011,34.2041,14.1748,0.17199,2.54931,2.11085,12.03,5.0,0.15 1.215,0.0160,0.0019,115,0.0022,Known errors,1.14,0,-1,-1 20240129_079589,60137.04 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org