IOTA/IOTA-ES occultation update for (535168) 2014 XU40 / UCAC4 564-019180 event on 2023 Dec 22, 10:56 UT Visible from Summary ------- On 2023 Dec 22 UT, the 125.8 km diameter asteroid (535168) 2014 XU40 will occult a 14.4 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.94 mag to 22.35 mag (the magnitude of the asteroid) for at most 5.080 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: 2 * date and approx. time of event: 2023 Dec 22, 10:56 - 2023 Dec 22, 11:02 * geocentric midpoint of event [JD]: 2460300.95781258 * magnitude of target star: 14.41 * magnitude drop [mag]: 7.94 * estimated maximum duration [s]: 5.080 * Moon: 79 % sunlit, 52° distance * Sun: 176° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 192 * 1 sigma uncertainty interval [path widths]: +/- 24.03 * 1 sigma uncertainty interval [seconds]: +/- 456.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.478, +/- 0.121) * 1 sigma uncertainty ellipse (major, minor, PA): (0.479", 0.118", 93°) * approx speed of asteroid's shadow [km/s]: 24.7458 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 564-019180 by 535168 2014 XU40 on 2023 Dec 22 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 127 0 0 -46 12 53 11 2 2.8 1 55 2 -45 10 21 -47 17 4 .. .. .. .. .. .. .... 128 0 0 -45 44 52 11 2 2.7 1 55 1 -44 42 31 -46 48 50 .. .. .. .. .. .. 0.67 129 0 0 -45 16 54 11 2 2.5 2 54 1 -44 14 45 -46 20 39 .. .. .. .. .. .. 0.85 130 0 0 -44 49 0 11 2 2.2 3 53 0 -43 47 3 -45 52 33 .. .. .. .. .. .. 0.94 131 0 0 -44 21 12 11 2 1.9 4 53 -1 -43 19 27 -45 24 31 .. .. .. .. .. .. 0.99 132 0 0 -43 53 30 11 2 1.4 5 52 -2 -42 51 57 -44 56 36 .. .. .. .. .. .. 1.02 133 0 0 -43 25 55 11 2 0.9 6 51 -3 -42 24 35 -44 28 47 .. .. .. .. .. .. 1.04 134 0 0 -42 58 28 11 2 0.2 7 51 -4 -41 57 21 -44 1 7 .. .. .. .. .. .. 1.06 135 0 0 -42 31 11 11 1 59.5 7 50 -5 -41 30 17 -43 33 35 .. .. .. .. .. .. 1.07 136 0 0 -42 4 3 11 1 58.7 8 49 -5 -41 3 22 -43 6 14 .. .. .. .. .. .. 1.08 137 0 0 -41 37 7 11 1 57.8 9 48 -6 -40 36 39 -42 39 3 .. .. .. .. .. .. 1.09 138 0 0 -41 10 22 11 1 56.8 10 48 -7 -40 10 8 -42 12 4 .. .. .. .. .. .. 1.10 139 0 0 -40 43 51 11 1 55.8 11 47 -8 -39 43 50 -41 45 18 .. .. .. .. .. .. 1.11 140 0 0 -40 17 33 11 1 54.6 12 46 -9 -39 17 46 -41 18 45 .. .. .. .. .. .. 1.11 141 0 0 -39 51 29 11 1 53.3 13 46 -10 -38 51 56 -40 52 27 .. .. .. .. .. .. 1.12 142 0 0 -39 25 41 11 1 52.0 13 45 -11 -38 26 22 -40 26 24 .. .. .. .. .. .. 1.12 143 0 0 -39 0 9 11 1 50.5 14 44 -11 -38 1 3 -40 0 38 .. .. .. .. .. .. 1.12 144 0 0 -38 34 54 11 1 49.0 15 44 -12 -37 36 2 -39 35 8 .. .. .. .. .. .. 1.13 145 0 0 -38 9 57 11 1 47.4 16 43 -13 -37 11 18 -39 9 56 .. .. .. .. .. .. 1.13 146 0 0 -37 45 17 11 1 45.7 17 42 -14 -36 46 52 -38 45 3 .. .. .. .. .. .. 1.13 147 0 0 -37 20 58 11 1 43.9 18 42 -15 -36 22 46 -38 20 28 .. .. .. .. .. .. 1.13 148 0 0 -36 56 57 11 1 42.0 18 41 -16 -35 58 59 -37 56 14 .. .. .. .. .. .. 1.14 149 0 0 -36 33 18 11 1 40.0 19 40 -17 -35 35 32 -37 32 20 .. .. .. .. .. .. 1.14 150 0 0 -36 9 59 11 1 38.0 20 39 -17 -35 12 27 -37 8 47 - 0 20 15 .. .. .. 1.14 151 0 0 -35 47 2 11 1 35.9 21 39 -18 -34 49 43 -36 45 36 - 0 2 15 .. .. .. 1.14 152 0 0 -35 24 27 11 1 33.6 22 38 -19 -34 27 21 -36 22 48 0 15 25 .. .. .. 1.14 153 0 0 -35 2 15 11 1 31.4 22 37 -20 -34 5 22 -36 0 22 0 32 45 .. .. .. 1.14 154 0 0 -34 40 27 11 1 29.0 23 37 -21 -33 43 46 -35 38 21 0 49 45 .. .. .. 1.14 155 0 0 -34 19 3 11 1 26.5 24 36 -21 -33 22 34 -35 16 43 1 6 23 .. .. .. 1.14 156 0 0 -33 58 3 11 1 24.0 25 35 -22 -33 1 47 -34 55 30 1 22 41 .. .. .. 1.15 157 0 0 -33 37 28 11 1 21.4 25 34 -23 -32 41 24 -34 34 42 1 38 37 .. .. .. 1.15 158 0 0 -33 17 18 11 1 18.7 26 33 -24 -32 21 26 -34 14 20 1 54 12 .. .. .. 1.15 159 0 0 -32 57 34 11 1 16.0 27 33 -24 -32 1 54 -33 54 24 2 9 26 .. .. .. 1.15 160 0 0 -32 38 17 11 1 13.2 28 32 -25 -31 42 48 -33 34 55 2 24 17 .. .. .. 1.15 161 0 0 -32 19 26 11 1 10.3 28 31 -26 -31 24 8 -33 15 52 2 38 47 .. .. .. 1.15 162 0 0 -32 1 3 11 1 7.4 29 30 -27 -31 5 55 -32 57 17 2 52 54 .. .. .. 1.15 163 0 0 -31 43 6 11 1 4.3 30 29 -27 -30 48 9 -32 39 9 3 6 39 .. .. .. 1.15 164 0 0 -31 25 38 11 1 1.3 30 28 -28 -30 30 51 -32 21 30 3 20 2 .. .. .. 1.15 165 0 0 -31 8 38 11 0 58.1 31 28 -29 -30 14 1 -32 4 19 3 33 2 .. .. .. 1.15 166 0 0 -30 52 6 11 0 55.0 32 27 -29 -29 57 39 -31 47 37 3 45 39 .. .. .. 1.15 167 0 0 -30 36 3 11 0 51.7 32 26 -30 -29 41 46 -31 31 23 3 57 53 .. .. .. 1.15 168 0 0 -30 20 29 11 0 48.4 33 25 -31 -29 26 21 -31 15 40 4 9 45 .. .. .. 1.15 169 0 0 -30 5 24 11 0 45.1 33 24 -31 -29 11 25 -31 0 25 4 21 13 .. .. .. 1.15 170 0 0 -29 50 49 11 0 41.7 34 23 -32 -28 56 59 -30 45 41 4 32 18 .. .. .. 1.15 171 0 0 -29 36 43 11 0 38.2 35 22 -32 -28 43 2 -30 31 27 4 43 0 .. .. .. 1.15 172 0 0 -29 23 8 11 0 34.7 35 21 -33 -28 29 35 -30 17 43 4 53 19 .. .. .. 1.16 173 0 0 -29 10 3 11 0 31.2 36 20 -34 -28 16 37 -30 4 29 5 3 14 .. .. .. 1.16 174 0 0 -28 57 28 11 0 27.6 36 19 -34 -28 4 10 -29 51 47 5 12 45 .. .. .. 1.16 175 0 0 -28 45 24 11 0 24.0 37 18 -35 -27 52 13 -29 39 35 5 21 53 .. .. .. 1.16 176 0 0 -28 33 51 11 0 20.4 37 17 -35 -27 40 47 -29 27 55 5 30 37 .. .. .. 1.16 177 0 0 -28 22 49 11 0 16.7 37 16 -36 -27 29 52 -29 16 46 5 38 57 .. .. .. 1.16 178 0 0 -28 12 18 11 0 13.0 38 15 -36 -27 19 27 -29 6 8 5 46 54 .. .. .. 1.16 179 0 0 -28 2 18 11 0 9.2 38 14 -36 -27 9 33 -28 56 2 5 54 26 .. .. .. 1.16 -180 0 0 -27 52 50 11 0 5.4 38 13 -37 -27 0 11 -28 46 28 6 1 35 .. .. .. 1.16 -179 0 0 -27 43 53 11 0 1.6 39 12 -37 -26 51 19 -28 37 25 6 8 20 .. .. .. 1.16 -178 0 0 -27 35 28 10 59 57.8 39 10 -38 -26 42 59 -28 28 55 6 14 40 .. .. .. 1.16 -177 0 0 -27 27 35 10 59 54.0 39 9 -38 -26 35 11 -28 20 57 6 20 37 .. .. .. 1.16 -176 0 0 -27 20 14 10 59 50.1 40 8 -38 -26 27 54 -28 13 31 6 26 9 .. .. .. 1.16 -175 0 0 -27 13 24 10 59 46.2 40 7 -39 -26 21 8 -28 6 37 6 31 17 .. .. .. 1.16 -174 0 0 -27 7 7 10 59 42.3 40 6 -39 -26 14 55 -28 0 16 6 36 1 .. .. .. 1.16 -173 0 0 -27 1 22 10 59 38.4 40 5 -39 -26 9 13 -27 54 27 6 40 21 .. .. .. 1.16 -172 0 0 -26 56 9 10 59 34.4 40 3 -39 -26 4 3 -27 49 11 6 44 16 .. .. .. 1.16 -171 0 0 -26 51 28 10 59 30.5 41 2 -40 -25 59 25 -27 44 27 6 47 48 .. .. .. 1.16 -170 0 0 -26 47 20 10 59 26.5 41 1 -40 -25 55 20 -27 40 16 6 50 55 .. .. .. 1.16 -169 0 0 -26 43 44 10 59 22.6 41 360 -40 -25 51 46 -27 36 38 6 53 37 .. .. .. 1.16 -168 0 0 -26 40 41 10 59 18.6 41 359 -40 -25 48 44 -27 33 33 6 55 56 .. .. .. 1.16 -167 0 0 -26 38 10 10 59 14.7 41 357 -40 -25 46 15 -27 31 0 6 57 49 .. .. .. 1.16 -166 0 0 -26 36 11 10 59 10.7 41 356 -40 -25 44 17 -27 29 1 6 59 19 .. .. .. 1.16 -165 0 0 -26 34 45 10 59 6.7 41 355 -40 -25 42 52 -27 27 34 7 0 24 .. .. .. 1.16 -164 0 0 -26 33 52 10 59 2.8 41 354 -40 -25 41 59 -27 26 40 7 1 5 .. .. .. 1.16 -163 0 0 -26 33 31 10 58 58.8 41 353 -40 -25 41 39 -27 26 19 7 1 21 .. .. .. 1.16 -162 0 0 -26 33 43 10 58 54.9 40 351 -40 -25 41 50 -27 26 31 7 1 13 .. .. .. 1.16 -161 0 0 -26 34 27 10 58 51.0 40 350 -40 -25 42 34 -27 27 16 7 0 41 .. .. .. 1.16 -160 0 0 -26 35 44 10 58 47.1 40 349 -40 -25 43 50 -27 28 33 6 59 44 .. .. .. 1.16 -159 0 0 -26 37 33 10 58 43.2 40 348 -40 -25 45 38 -27 30 24 6 58 23 .. .. .. 1.16 -158 0 0 -26 39 55 10 58 39.3 40 347 -40 -25 47 59 -27 32 47 6 56 38 .. .. .. 1.16 -157 0 0 -26 42 50 10 58 35.4 39 346 -39 -25 50 52 -27 35 44 6 54 28 .. .. .. 1.16 -156 0 0 -26 46 17 10 58 31.6 39 345 -39 -25 54 16 -27 39 13 6 51 53 .. .. .. 1.16 -155 0 0 -26 50 16 10 58 27.8 39 343 -39 -25 58 13 -27 43 15 6 48 55 .. .. .. 1.17 -154 0 0 -26 54 48 10 58 24.0 38 342 -39 -26 2 42 -27 47 50 6 45 32 .. .. .. 1.17 -153 0 0 -26 59 52 10 58 20.2 38 341 -38 -26 7 44 -27 52 57 6 41 44 .. .. .. 1.17 -152 0 0 -27 5 29 10 58 16.5 38 340 -38 -26 13 17 -27 58 38 6 37 33 .. .. .. 1.17 -151 0 0 -27 11 38 10 58 12.8 37 339 -38 -26 19 22 -28 4 50 6 32 57 .. .. .. 1.17 -150 0 0 -27 18 19 10 58 9.1 37 338 -37 -26 25 59 -28 11 36 6 27 57 .. .. .. 1.17 -149 0 0 -27 25 32 10 58 5.5 36 337 -37 -26 33 7 -28 18 53 6 22 32 .. .. .. 1.17 -148 0 0 -27 33 17 10 58 1.9 36 336 -37 -26 40 48 -28 26 43 6 16 44 .. .. .. 1.17 -147 0 0 -27 41 34 10 57 58.3 35 335 -36 -26 49 0 -28 35 6 6 10 31 .. .. .. 1.17 -146 0 0 -27 50 23 10 57 54.8 35 334 -36 -26 57 43 -28 44 0 6 3 54 .. .. .. 1.17 -145 0 0 -27 59 43 10 57 51.3 34 333 -35 -27 6 58 -28 53 27 5 56 53 .. .. .. 1.17 -144 0 0 -28 9 35 10 57 47.9 34 332 -35 -27 16 44 -29 3 25 5 49 28 .. .. .. 1.17 -143 0 0 -28 19 59 10 57 44.5 33 331 -34 -27 27 2 -29 13 56 5 41 39 .. .. .. 1.17 -142 0 0 -28 30 54 10 57 41.2 33 330 -34 -27 37 50 -29 24 57 5 33 26 .. .. .. 1.17 -141 0 0 -28 42 20 10 57 37.9 32 330 -33 -27 49 9 -29 36 31 5 24 49 .. .. .. 1.17 -140 0 0 -28 54 17 10 57 34.6 32 329 -33 -28 0 59 -29 48 36 5 15 48 .. .. .. 1.17 -139 0 0 -29 6 45 10 57 31.5 31 328 -32 -28 13 20 -30 1 12 5 6 23 .. .. .. 1.17 -138 0 0 -29 19 44 10 57 28.4 30 327 -31 -28 26 11 -30 14 19 4 56 35 .. .. .. 1.17 -137 0 0 -29 33 13 10 57 25.3 30 326 -31 -28 39 32 -30 27 56 4 46 23 .. .. .. 1.17 -136 0 0 -29 47 13 10 57 22.3 29 325 -30 -28 53 23 -30 42 5 4 35 48 .. .. .. 1.17 -135 0 0 -30 1 42 10 57 19.4 28 325 -30 -29 7 43 -30 56 43 4 24 49 .. .. .. 1.18 -134 0 0 -30 16 41 10 57 16.5 28 324 -29 -29 22 33 -31 11 52 4 13 27 .. .. .. 1.18 -133 0 0 -30 32 10 10 57 13.7 27 323 -28 -29 37 53 -31 27 31 4 1 42 .. .. .. 1.18 -132 0 0 -30 48 8 10 57 11.0 26 322 -27 -29 53 41 -31 43 39 3 49 33 .. .. .. 1.18 -131 0 0 -31 4 35 10 57 8.3 25 321 -27 -30 9 59 -32 0 17 3 37 1 .. .. .. 1.18 -130 0 0 -31 21 31 10 57 5.7 25 321 -26 -30 26 44 -32 17 23 3 24 7 .. .. .. 1.18 -129 0 0 -31 38 55 10 57 3.2 24 320 -25 -30 43 58 -32 34 58 3 10 50 .. .. .. 1.18 -128 0 0 -31 56 48 10 57 0.7 23 319 -25 -31 1 40 -32 53 2 2 57 10 .. .. .. 1.18 -127 0 0 -32 15 8 10 56 58.3 22 319 -24 -31 19 49 -33 11 34 2 43 7 .. .. .. 1.18 -126 0 0 -32 33 55 10 56 56.0 22 318 -23 -31 38 25 -33 30 33 2 28 42 .. .. .. 1.18 -125 0 0 -32 53 9 10 56 53.8 21 317 -22 -31 57 28 -33 49 59 .. .. .. .. .. .. 1.18 -124 0 0 -33 12 50 10 56 51.7 20 317 -22 -32 16 58 -34 9 52 .. .. .. .. .. .. 1.18 -123 0 0 -33 32 57 10 56 49.6 19 316 -21 -32 36 53 -34 30 12 .. .. .. .. .. .. 1.18 -122 0 0 -33 53 30 10 56 47.7 18 315 -20 -32 57 14 -34 50 58 .. .. .. .. .. .. 1.19 -121 0 0 -34 14 28 10 56 45.8 17 314 -19 -33 17 59 -35 12 9 .. .. .. .. .. .. 1.19 -120 0 0 -34 35 51 10 56 44.0 17 314 -18 -33 39 10 -35 33 45 .. .. .. .. .. .. 1.19 -119 0 0 -34 57 38 10 56 42.3 16 313 -17 -34 0 44 -35 55 45 .. .. .. .. .. .. 1.19 -118 0 0 -35 19 49 10 56 40.7 15 313 -17 -34 22 42 -36 18 10 .. .. .. .. .. .. 1.19 -117 0 0 -35 42 23 10 56 39.1 14 312 -16 -34 45 3 -36 40 58 .. .. .. .. .. .. 1.19 -116 0 0 -36 5 19 10 56 37.7 13 311 -15 -35 7 47 -37 4 8 .. .. .. .. .. .. 1.19 -115 0 0 -36 28 38 10 56 36.3 12 311 -14 -35 30 52 -37 27 41 .. .. .. .. .. .. 1.20 -114 0 0 -36 52 18 10 56 35.1 11 310 -13 -35 54 19 -37 51 35 .. .. .. .. .. .. 1.20 -113 0 0 -37 16 19 10 56 33.9 11 309 -12 -36 18 6 -38 15 50 .. .. .. .. .. .. 1.20 -112 0 0 -37 40 39 10 56 32.8 10 309 -12 -36 42 13 -38 40 25 .. .. .. .. .. .. 1.20 -111 0 0 -38 5 19 10 56 31.8 9 308 -11 -37 6 40 -39 5 20 .. .. .. .. .. .. 1.20 -110 0 0 -38 30 18 10 56 30.9 8 307 -10 -37 31 25 -39 30 33 .. .. .. .. .. .. 1.21 -109 0 0 -38 55 35 10 56 30.1 7 307 -9 -37 56 28 -39 56 5 .. .. .. .. .. .. 1.21 -108 0 0 -39 21 9 10 56 29.4 6 306 -8 -38 21 48 -40 21 53 .. .. .. .. .. .. 1.22 -107 0 0 -39 46 59 10 56 28.8 5 306 -7 -38 47 25 -40 47 58 .. .. .. .. .. .. 1.22 -106 0 0 -40 13 5 10 56 28.3 5 305 -6 -39 13 17 -41 14 19 .. .. .. .. .. .. 1.23 -105 0 0 -40 39 26 10 56 27.9 4 304 -6 -39 39 24 -41 40 54 .. .. .. .. .. .. 1.25 -104 0 0 -41 6 0 10 56 27.6 3 304 -5 -40 5 45 -42 7 43 .. .. .. .. .. .. 1.27 -103 0 0 -41 32 48 10 56 27.3 2 303 -4 -40 32 19 -42 34 45 .. .. .. .. .. .. 1.32 -102 0 0 -41 59 47 10 56 27.2 1 302 -3 -40 59 5 -43 1 59 .. .. .. .. .. .. 1.43 -101 0 0 -42 26 58 10 56 27.1 0 302 -2 -41 26 3 .. .. .. .. .. .. .. .. .. 2.89 Uncertainty in time = +/- 459 secs Prediction of 2022 Jun 15.2 Data for the target star ------------------------ * name: UCAC4 564-019180 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 44 18.9253 DE: +22 41 46.788 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 44 18.9253 DE: +22 41 46.788 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 14.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (535168) 2014 XU40 asteroid class: TNO approx. diameter [km]: 126 approx. diameter ["]: 0.005 distance from Earth [AU]: 32.72360 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#7 date of fit: 2022 Feb 05 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): 0.479", 0.118", 93.381° remarks: * orbital elements for (535168)2014 XU40 : Mean anomaly = 332.9476025082 deg Arg. of pericenter = 226.6942433435 deg Long. of node = 258.3545527768 deg Inclination = 4.7510215517 deg Eccentricity = 0.1782259720 Semimajor axis = 39.6646191448 AU Perihelion dist = 32.5953538450 AU Mag: H = 7.17, G = 0.15 Epoch of elements : MJD 60300.45618056 TDT (2023 Dec 22.4562) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#72022Feb05,5.08,2023,12,22,10.987502,0.031606,-0.756190,-13.955008,-0.583533,0.000418,0.000084,0.000001,0.000000 -169.1123,22.7073,14.80,-23.44,False UCAC4 564-019180,5.73859036,22.6963299,0.00,14.41,0.00,0.0,0,,5.76306655,22.7073393,7.94,0.00,0,1,1 535168,2014 XU40,22.35,125.8,32.7236,0,0,-0.271,-0.16,,12.4 0,332.9458,2023,12,22,226.6942,258.3546,4.7510,0.17823,39.66462,32.59535,7.10,5.0,0.15 25.026,0.4787,0.1183,93,0.1273,Known errors,-1.00,-1,-1,-1 20231222_019180,59745.24 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jun 15, 05:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org