IOTA/IOTA-ES occultation update for (1354) Botha / UCAC4 315-090981 event on 2024 Oct 01, 19:08 UT Visible from Summary ------- On 2024 Oct 01 UT, the 44.324536858938 km diameter asteroid (1354) Botha will occult a 11.1 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 5.10 mag to 16.19 mag (the magnitude of the asteroid) for at most 1.340 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 Oct 01, 19:06 - 2024 Oct 01, 19:10 * geocentric midpoint of event [JD]: 2460585.29744987 * magnitude of target star: 11.10 * magnitude drop [mag]: 5.10 * estimated maximum duration [s]: 1.340 * Moon: 1 % sunlit, 75° distance * Sun: 63° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.001", 103°) * approx speed of asteroid's shadow [km/s]: 33.1207 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 315-090981 by 1354 Botha 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 -106 0 0 45 2 46 19 6 6.4 0 130 41 44 40 13 45 25 31 44 34 53 45 30 58 .... -105 0 0 44 26 48 19 6 6.5 1 131 42 44 4 20 44 49 28 43 59 1 44 54 54 -0.46 -104 0 0 43 50 48 19 6 6.6 2 132 42 43 28 26 44 13 23 43 23 8 44 18 47 -0.70 -103 0 0 43 14 48 19 6 6.8 3 132 43 42 52 31 43 37 17 42 47 14 43 42 40 -0.79 -102 0 0 42 38 49 19 6 7.1 4 133 43 42 16 37 43 1 12 42 11 22 43 6 34 -0.85 -101 0 0 42 2 52 19 6 7.5 5 134 44 41 40 46 42 25 10 41 35 32 42 30 30 -0.88 -100 0 0 41 26 59 19 6 7.9 6 135 44 41 4 59 41 49 11 40 59 46 41 54 30 -0.91 - 99 0 0 40 51 12 19 6 8.4 7 135 45 40 29 18 41 13 18 40 24 6 41 18 35 -0.92 - 98 0 0 40 15 32 19 6 9.0 8 136 45 39 53 43 40 37 31 39 48 33 40 42 47 -0.94 - 97 0 0 39 40 0 19 6 9.7 9 137 45 39 18 17 40 1 53 39 13 9 40 7 7 -0.95 - 96 0 0 39 4 37 19 6 10.5 10 137 46 38 43 1 39 26 24 38 37 55 39 31 37 -0.95 - 95 0 0 38 29 26 19 6 11.3 11 138 46 38 7 57 38 51 7 38 2 51 38 56 18 -0.96 - 94 0 0 37 54 28 19 6 12.3 12 139 46 37 33 5 38 16 2 37 28 1 38 21 11 -0.97 - 93 0 0 37 19 43 19 6 13.3 13 139 46 36 58 26 37 41 11 36 53 24 37 46 18 -0.97 - 92 0 0 36 45 14 19 6 14.3 14 140 47 36 24 4 37 6 35 36 19 3 37 11 41 -0.98 - 91 0 0 36 11 2 19 6 15.5 15 140 47 35 49 57 36 32 15 35 44 58 36 37 20 -0.98 - 90 0 0 35 37 7 19 6 16.8 16 141 47 35 16 9 35 58 14 35 11 11 36 3 17 -0.98 - 89 0 0 35 3 31 19 6 18.1 17 142 47 34 42 40 35 24 32 34 37 43 35 29 33 -0.99 - 88 0 0 34 30 15 19 6 19.5 17 142 47 34 9 31 34 51 9 34 4 36 34 56 9 -0.99 - 87 0 0 33 57 21 19 6 21.0 18 143 47 33 36 43 34 18 9 33 31 50 34 23 7 -0.99 - 86 0 0 33 24 50 19 6 22.5 19 144 47 33 4 18 33 45 31 32 59 26 33 50 27 -1.00 - 85 0 0 32 52 42 19 6 24.2 20 145 47 32 32 17 33 13 16 32 27 26 33 18 11 -1.00 - 84 0 0 32 20 59 19 6 25.9 21 145 47 32 0 40 32 41 26 31 55 51 32 46 20 -1.00 - 83 0 0 31 49 41 19 6 27.7 22 146 47 31 29 28 32 10 2 31 24 41 32 14 54 -1.00 - 82 0 0 31 18 50 19 6 29.5 23 147 47 30 58 43 31 39 5 30 53 58 31 43 55 -1.00 - 81 0 0 30 48 26 19 6 31.4 24 147 46 30 28 26 31 8 35 30 23 42 31 13 24 -1.01 - 80 0 0 30 18 31 19 6 33.4 25 148 46 29 58 37 30 38 34 29 53 54 30 43 21 -1.01 - 79 0 0 29 49 5 19 6 35.5 26 149 46 29 29 17 30 9 2 29 24 36 30 13 47 -1.01 - 78 0 0 29 20 10 19 6 37.6 27 150 46 29 0 28 29 40 0 28 55 47 29 44 44 -1.01 - 77 0 0 28 51 45 19 6 39.8 27 150 45 28 32 9 29 11 29 28 27 30 29 16 12 -1.01 - 76 0 0 28 23 52 19 6 42.1 28 151 45 28 4 21 28 43 30 27 59 44 28 48 11 -1.01 - 75 0 0 27 56 30 19 6 44.4 29 152 44 27 37 6 28 16 3 27 32 30 28 20 43 -1.01 - 74 0 0 27 29 42 19 6 46.8 30 153 44 27 10 23 27 49 9 27 5 48 27 53 47 -1.01 - 73 0 0 27 3 27 19 6 49.2 31 153 43 26 44 14 27 22 48 26 39 40 27 27 26 -1.02 - 72 0 0 26 37 47 19 6 51.7 31 154 43 26 18 39 26 57 2 26 14 7 27 1 39 -1.02 - 71 0 0 26 12 41 19 6 54.3 32 155 42 25 53 38 26 31 51 25 49 7 26 36 26 -1.02 - 70 0 0 25 48 11 19 6 56.8 33 156 42 25 29 13 26 7 15 25 24 43 26 11 49 -1.02 - 69 0 0 25 24 16 19 6 59.5 34 157 41 25 5 23 25 43 15 25 0 54 25 47 48 -1.02 - 68 0 0 25 0 57 19 7 2.2 34 158 41 24 42 9 25 19 52 24 37 42 25 24 23 -1.02 - 67 0 0 24 38 15 19 7 4.9 35 159 40 24 19 32 24 57 5 24 15 6 25 1 35 -1.02 - 66 0 0 24 16 10 19 7 7.7 36 160 39 23 57 32 24 34 55 23 53 6 24 39 24 -1.02 - 65 0 0 23 54 42 19 7 10.5 36 161 39 23 36 9 24 13 23 23 31 44 24 17 50 -1.02 - 64 0 0 23 33 53 19 7 13.4 37 162 38 23 15 23 23 52 29 23 11 0 23 56 55 -1.02 - 63 0 0 23 13 41 19 7 16.3 38 163 37 22 55 16 23 32 13 22 50 54 23 36 38 -1.03 - 62 0 0 22 54 8 19 7 19.2 38 164 37 22 35 47 23 12 35 22 31 26 23 17 0 -1.03 - 61 0 0 22 35 13 19 7 22.2 39 165 36 22 16 56 22 53 37 22 12 36 22 58 0 -1.03 - 60 0 0 22 16 58 19 7 25.2 39 166 35 21 58 45 22 35 17 21 54 26 22 39 40 -1.03 - 59 0 0 21 59 22 19 7 28.2 40 167 34 21 41 12 22 17 37 21 36 54 22 21 59 -1.03 - 58 0 0 21 42 25 19 7 31.3 40 168 34 21 24 19 22 0 37 21 20 2 22 4 58 -1.03 - 57 0 0 21 26 8 19 7 34.4 41 169 33 21 8 6 21 44 16 21 3 49 21 48 36 -1.03 - 56 0 0 21 10 31 19 7 37.5 41 170 32 20 52 32 21 28 36 20 48 16 21 32 55 -1.03 - 55 0 0 20 55 34 19 7 40.6 42 171 31 20 37 38 21 13 36 20 33 23 21 17 54 -1.03 - 54 0 0 20 41 17 19 7 43.8 42 172 30 20 23 24 20 59 16 20 19 10 21 3 33 -1.03 - 53 0 0 20 27 41 19 7 46.9 42 174 30 20 9 51 20 45 36 20 5 37 20 49 53 -1.03 - 52 0 0 20 14 45 19 7 50.1 43 175 29 19 56 58 20 32 38 19 52 45 20 36 54 -1.03 - 51 0 0 20 2 30 19 7 53.3 43 176 28 19 44 45 20 20 20 19 40 33 20 24 35 -1.03 - 50 0 0 19 50 55 19 7 56.5 43 177 27 19 33 13 20 8 43 19 29 1 20 12 58 -1.03 - 49 0 0 19 40 2 19 7 59.7 43 178 26 19 22 22 19 57 47 19 18 11 20 2 2 -1.03 - 48 0 0 19 29 49 19 8 3.0 44 180 25 19 12 12 19 47 32 19 8 1 19 51 46 -1.03 - 47 0 0 19 20 18 19 8 6.2 44 181 24 19 2 42 19 37 59 18 58 32 19 42 12 -1.04 - 46 0 0 19 11 27 19 8 9.4 44 182 23 18 53 54 19 29 7 18 49 44 19 33 20 -1.04 - 45 0 0 19 3 18 19 8 12.7 44 183 23 18 45 47 19 20 56 18 41 37 19 25 8 -1.04 - 44 0 0 18 55 51 19 8 15.9 44 185 22 18 38 20 19 13 26 18 34 11 19 17 38 -1.04 - 43 0 0 18 49 4 19 8 19.2 44 186 21 18 31 35 19 6 38 18 27 26 19 10 50 -1.04 - 42 0 0 18 42 59 19 8 22.4 44 187 20 18 25 31 19 0 32 18 21 23 19 4 43 -1.04 - 41 0 0 18 37 35 19 8 25.7 44 188 19 18 20 9 18 55 7 18 16 1 18 59 18 -1.04 - 40 0 0 18 32 53 19 8 28.9 44 190 18 18 15 27 18 50 24 18 11 20 18 54 34 -1.04 - 39 0 0 18 28 52 19 8 32.1 44 191 17 18 11 27 18 46 22 18 7 20 18 50 32 -1.04 - 38 0 0 18 25 32 19 8 35.3 44 192 16 18 8 9 18 43 2 18 4 1 18 47 12 -1.04 - 37 0 0 18 22 54 19 8 38.6 43 193 15 18 5 31 18 40 23 18 1 24 18 44 33 -1.04 - 36 0 0 18 20 58 19 8 41.7 43 195 14 18 3 35 18 38 26 17 59 28 18 42 36 -1.04 - 35 0 0 18 19 43 19 8 44.9 43 196 13 18 2 21 18 37 11 17 58 13 18 41 21 -1.04 - 34 0 0 18 19 10 19 8 48.1 43 197 12 18 1 47 18 36 37 17 57 40 18 40 47 -1.04 - 33 0 0 18 19 17 19 8 51.3 42 198 11 18 1 55 18 36 45 17 57 48 18 40 55 -1.04 - 32 0 0 18 20 7 19 8 54.4 42 199 10 18 2 45 18 37 35 17 58 37 18 41 45 -1.04 - 31 0 0 18 21 38 19 8 57.5 42 200 9 18 4 15 18 39 6 18 0 8 18 43 16 -1.04 - 30 0 0 18 23 50 19 9 0.6 41 202 8 18 6 27 18 41 19 18 2 20 18 45 29 -1.04 - 29 0 0 18 26 44 19 9 3.7 41 203 7 18 9 21 18 44 13 18 5 13 18 48 24 -1.04 - 28 0 0 18 30 19 19 9 6.7 41 204 6 18 12 55 18 47 49 18 8 47 18 52 0 -1.04 - 27 0 0 18 34 36 19 9 9.7 40 205 6 18 17 11 18 52 7 18 13 3 18 56 18 -1.04 - 26 0 0 18 39 34 19 9 12.7 40 206 5 18 22 8 18 57 6 18 18 0 19 1 17 -1.04 - 25 0 0 18 45 13 19 9 15.7 39 207 4 18 27 46 19 2 46 18 23 37 19 6 58 -1.04 - 24 0 0 18 51 34 19 9 18.6 39 208 3 18 34 5 19 9 8 18 29 56 19 13 20 -1.04 - 23 0 0 18 58 35 19 9 21.5 38 209 2 18 41 5 19 16 11 18 36 56 19 20 23 -1.04 - 22 0 0 19 6 18 19 9 24.3 37 210 1 18 48 46 19 23 56 18 44 37 19 28 8 -1.04 - 21 0 0 19 14 42 19 9 27.2 37 210 0 18 57 8 19 32 21 18 52 58 19 36 34 -1.04 - 20 0 0 19 23 47 19 9 29.9 36 211 -1 19 6 11 19 41 28 19 2 1 19 45 41 -1.04 - 19 0 0 19 33 32 19 9 32.7 36 212 -2 19 15 55 19 51 16 19 11 44 19 55 29 -1.04 - 18 0 0 19 43 59 19 9 35.4 35 213 -3 19 26 19 20 1 44 19 22 8 20 5 59 -1.04 - 17 0 0 19 55 6 19 9 38.1 34 214 -4 19 37 24 20 12 53 19 33 12 20 17 8 -1.04 - 16 0 0 20 6 53 19 9 40.7 34 215 -5 19 49 9 20 24 44 19 44 56 20 28 59 -1.04 - 15 0 0 20 19 21 19 9 43.2 33 215 -6 20 1 34 20 37 14 19 57 21 20 41 30 -1.04 - 14 0 0 20 32 30 19 9 45.8 32 216 -7 20 14 40 20 50 25 20 10 26 20 54 42 -1.04 - 13 0 0 20 46 18 19 9 48.2 31 217 -8 20 28 26 21 4 17 20 24 11 21 8 34 -1.04 - 12 0 0 21 0 47 19 9 50.7 31 218 -9 20 42 51 21 18 49 20 38 36 21 23 7 -1.04 - 11 0 0 21 15 55 19 9 53.0 30 218 -10 20 57 57 21 34 0 20 53 41 21 38 19 -1.04 - 10 0 0 21 31 43 19 9 55.4 29 219 -11 21 13 41 21 49 52 21 9 25 21 54 12 -1.04 - 9 0 0 21 48 11 19 9 57.6 28 220 -12 21 30 5 22 6 23 21 25 48 22 10 43 -1.04 - 8 0 0 22 5 18 19 9 59.8 27 220 -13 21 47 9 22 23 33 21 42 50 22 27 55 -1.04 - 7 0 0 22 23 4 19 10 2.0 27 221 -14 22 4 51 22 41 23 22 0 32 22 45 45 -1.04 - 6 0 0 22 41 28 19 10 4.1 26 222 -14 22 23 12 22 59 51 22 18 51 23 4 15 -1.04 - 5 0 0 23 0 31 19 10 6.1 25 222 -15 22 42 11 23 18 58 22 37 50 23 23 23 -1.04 - 4 0 0 23 20 13 19 10 8.1 24 223 -16 23 1 48 23 38 44 22 57 26 23 43 9 -1.04 - 3 0 0 23 40 32 19 10 10.0 23 223 -17 23 22 3 23 59 7 23 17 40 24 3 34 -1.04 - 2 0 0 24 1 28 19 10 11.8 22 224 -18 23 42 55 24 20 8 23 38 31 24 24 36 -1.04 - 1 0 0 24 23 2 19 10 13.6 21 225 -19 24 4 24 24 41 47 23 59 59 24 46 16 -1.05 0 0 0 24 45 13 19 10 15.3 20 225 -20 24 26 30 25 4 2 24 22 4 25 8 32 -1.05 1 0 0 25 8 0 19 10 16.9 19 226 -21 24 49 13 25 26 55 24 44 46 25 31 25 -1.05 2 0 0 25 31 24 19 10 18.5 19 226 -22 25 12 31 25 50 23 25 8 3 25 54 55 -1.05 3 0 0 25 55 22 19 10 19.9 18 227 -22 25 36 25 26 14 27 25 31 56 26 19 0 -1.05 4 0 0 26 19 56 19 10 21.3 17 227 -23 26 0 54 26 39 6 25 56 23 26 43 40 -1.05 5 0 0 26 45 5 19 10 22.7 16 228 -24 26 25 57 27 4 20 26 21 25 27 8 56 -1.05 6 0 0 27 10 47 19 10 23.9 15 228 -25 26 51 34 27 30 8 26 47 1 27 34 45 -1.05 7 0 0 27 37 3 19 10 25.1 14 229 -26 27 17 45 27 56 29 27 13 11 28 1 8 -1.05 8 0 0 28 3 52 19 10 26.2 13 230 -27 27 44 29 28 23 24 27 39 53 28 28 4 -1.05 9 0 0 28 31 14 19 10 27.3 12 230 -27 28 11 44 28 50 51 28 7 7 28 55 32 -1.05 10 0 0 28 59 7 19 10 28.2 11 231 -28 28 39 31 29 18 50 28 34 53 29 23 32 -1.06 11 0 0 29 27 30 19 10 29.1 10 231 -29 29 7 49 29 47 19 29 3 9 29 52 4 -1.06 12 0 0 29 56 24 19 10 29.9 9 232 -30 29 36 37 30 16 19 29 31 56 30 21 5 -1.06 13 0 0 30 25 48 19 10 30.6 8 232 -30 30 5 55 30 45 49 30 1 12 30 50 36 -1.06 14 0 0 30 55 40 19 10 31.2 7 233 -31 30 35 41 31 15 47 30 30 56 31 20 36 -1.07 15 0 0 31 25 59 19 10 31.7 6 233 -32 31 5 54 31 46 13 31 1 9 31 51 3 -1.08 16 0 0 31 56 46 19 10 32.2 5 234 -32 31 36 35 32 17 6 31 31 48 32 21 58 -1.08 17 0 0 32 27 59 19 10 32.6 4 234 -33 32 7 41 32 48 25 32 2 53 32 53 18 -1.10 18 0 0 32 59 36 19 10 32.8 3 235 -34 32 39 13 33 20 9 32 34 23 33 25 4 -1.12 19 0 0 33 31 38 19 10 33.0 2 235 -34 33 11 8 33 52 18 33 6 16 33 57 14 -1.16 20 0 0 34 4 3 19 10 33.2 1 236 -35 33 43 26 34 24 49 33 38 33 34 29 47 -1.28 21 0 0 34 36 50 19 10 33.2 0 236 -35 34 16 7 .. .. .. 34 11 12 .. .. .. -5.64 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 315-090981 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 39 29.4266 DE: -27 02 10.092 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 39 29.4265 DE: -27 02 10.091 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1354) Botha asteroid class: approx. diameter [km]: 44 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.73640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#72 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): 0.022", 0.001", 103.224° remarks: * orbital elements for (1354)Botha : Mean anomaly = 356.7917518873 deg Arg. of pericenter = 250.0739314776 deg Long. of node = 28.6603292120 deg Inclination = 5.9498911511 deg Eccentricity = 0.2149799547 Semimajor axis = 3.1284918993 AU Perihelion dist = 2.4559288526 AU Mag: H = 11.01, G = 0.15 Epoch of elements : MJD 60584.79744971 TDT (2024 Oct 01.7974) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#722023Apr24,1.34,2024,10,1,19.138797,0.082340,0.714664,18.570235,-2.149480,0.004964,-0.000892,-0.000001,0.000000 -47.8357,-27.0856,-109.73,-3.61,False UCAC4 315-090981,16.65817410,-27.0361367,11.82,11.10,10.71,0.1,0,,16.68344716,-27.0856295,5.10,5.04,0,0,0 1354,Botha,16.19,44.523,2.7364,0,0,4.469,-6.90,,2.4,0 0,356.6497,2024,10,1,250.0739,28.6603,5.9499,0.21498,3.12849,2.45593,11.01,5.0,0.15 1.119,0.0217,0.0009,103,0.0027,Known errors,0.93,0,-1,-1 20241001_090981,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org