IOTA/IOTA-ES occultation update for (299) Thora / TYC 260-00239-1 event on 2024 Oct 30, 19:12 UT Visible from Summary ------- On 2024 Oct 30 UT, the 16.356 km diameter asteroid (299) Thora will occult a 11.1 mag star in the constellation Sextans for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.58 mag to 16.66 mag (the magnitude of the asteroid) for at most 0.490 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 30, 19:09 - 2024 Oct 30, 19:15 * geocentric midpoint of event [JD]: 2460614.30013362 * magnitude of target star: 11.09 * magnitude drop [mag]: 5.58 * estimated maximum duration [s]: 0.490 * Moon: 3 % sunlit, 36° distance * Sun: 56° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.002", 112°) * approx speed of asteroid's shadow [km/s]: 33.6856 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 260-00239-1 by 299 Thora on 2024 Oct 30 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 - 1 53 36 19 9 20.1 0 84 -50 .. .. .. - 1 48 41 .. .. .. - 1 46 40 .... 107 0 0 - 1 47 38 19 9 20.1 1 84 -49 - 1 52 33 - 1 42 43 - 1 54 34 - 1 40 42 0.20 108 0 0 - 1 42 7 19 9 20.2 2 84 -48 - 1 47 3 - 1 37 12 - 1 49 3 - 1 35 12 0.33 109 0 0 - 1 37 5 19 9 20.4 3 84 -47 - 1 42 0 - 1 32 10 - 1 44 1 - 1 30 10 0.38 110 0 0 - 1 32 31 19 9 20.6 4 84 -46 - 1 37 26 - 1 27 36 - 1 39 26 - 1 25 36 0.40 111 0 0 - 1 28 25 19 9 20.9 5 84 -45 - 1 33 19 - 1 23 30 - 1 35 20 - 1 21 30 0.42 112 0 0 - 1 24 47 19 9 21.3 6 84 -44 - 1 29 41 - 1 19 52 - 1 31 42 - 1 17 52 0.43 113 0 0 - 1 21 37 19 9 21.7 7 84 -43 - 1 26 32 - 1 16 43 - 1 28 32 - 1 14 43 0.43 114 0 0 - 1 18 56 19 9 22.2 8 84 -42 - 1 23 50 - 1 14 2 - 1 25 51 - 1 12 1 0.44 115 0 0 - 1 16 43 19 9 22.7 9 84 -42 - 1 21 37 - 1 11 49 - 1 23 38 - 1 9 49 0.44 116 0 0 - 1 14 59 19 9 23.3 10 84 -41 - 1 19 53 - 1 10 4 - 1 21 53 - 1 8 4 0.44 117 0 0 - 1 13 43 19 9 24.0 11 84 -40 - 1 18 37 - 1 8 48 - 1 20 37 - 1 6 48 0.45 118 0 0 - 1 12 55 19 9 24.7 12 84 -39 - 1 17 49 - 1 8 1 - 1 19 50 - 1 6 1 0.45 119 0 0 - 1 12 36 19 9 25.5 13 84 -38 - 1 17 30 - 1 7 42 - 1 19 31 - 1 5 42 0.45 120 0 0 - 1 12 46 19 9 26.4 14 84 -37 - 1 17 40 - 1 7 52 - 1 19 40 - 1 5 51 0.45 121 0 0 - 1 13 24 19 9 27.3 15 84 -36 - 1 18 18 - 1 8 30 - 1 20 18 - 1 6 30 0.45 122 0 0 - 1 14 31 19 9 28.3 16 84 -35 - 1 19 25 - 1 9 36 - 1 21 25 - 1 7 36 0.46 123 0 0 - 1 16 6 19 9 29.3 17 83 -34 - 1 21 0 - 1 11 12 - 1 23 1 - 1 9 12 0.46 124 0 0 - 1 18 10 19 9 30.4 18 83 -33 - 1 23 4 - 1 13 16 - 1 25 5 - 1 11 15 0.46 125 0 0 - 1 20 43 19 9 31.6 19 83 -32 - 1 25 37 - 1 15 48 - 1 27 38 - 1 13 48 0.46 126 0 0 - 1 23 44 19 9 32.8 20 83 -31 - 1 28 38 - 1 18 49 - 1 30 39 - 1 16 49 0.46 127 0 0 - 1 27 13 19 9 34.1 21 83 -30 - 1 32 8 - 1 22 19 - 1 34 9 - 1 20 18 0.46 128 0 0 - 1 31 12 19 9 35.4 22 83 -29 - 1 36 7 - 1 26 17 - 1 38 7 - 1 24 16 0.46 129 0 0 - 1 35 39 19 9 36.8 23 83 -28 - 1 40 34 - 1 30 44 - 1 42 35 - 1 28 43 0.46 130 0 0 - 1 40 34 19 9 38.3 24 83 -27 - 1 45 30 - 1 35 39 - 1 47 30 - 1 33 38 0.46 131 0 0 - 1 45 58 19 9 39.8 25 83 -26 - 1 50 54 - 1 41 3 - 1 52 55 - 1 39 2 0.46 132 0 0 - 1 51 51 19 9 41.4 26 83 -25 - 1 56 47 - 1 46 55 - 1 58 48 - 1 44 54 0.46 133 0 0 - 1 58 12 19 9 43.1 27 82 -24 - 2 3 8 - 1 53 16 - 2 5 9 - 1 51 15 0.46 134 0 0 - 2 5 1 19 9 44.8 28 82 -23 - 2 9 58 - 2 0 5 - 2 11 59 - 1 58 4 0.46 135 0 0 - 2 12 19 19 9 46.5 29 82 -22 - 2 17 16 - 2 7 23 - 2 19 17 - 2 5 22 0.46 136 0 0 - 2 20 6 19 9 48.3 30 82 -21 - 2 25 3 - 2 15 9 - 2 27 4 - 2 13 8 0.47 137 0 0 - 2 28 20 19 9 50.2 31 82 -20 - 2 33 18 - 2 23 23 - 2 35 19 - 2 21 22 0.47 138 0 0 - 2 37 3 19 9 52.1 32 81 -19 - 2 42 1 - 2 32 6 - 2 44 3 - 2 30 4 0.47 139 0 0 - 2 46 14 19 9 54.1 33 81 -18 - 2 51 13 - 2 41 17 - 2 53 14 - 2 39 15 0.47 140 0 0 - 2 55 54 19 9 56.2 34 81 -17 - 3 0 52 - 2 50 55 - 3 2 54 - 2 48 54 0.47 141 0 0 - 3 6 1 19 9 58.3 35 81 -16 - 3 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32 -14 14 53 -14 27 43 -14 12 42 0.47 179 0 0 -14 45 11 19 11 50.6 64 39 23 -14 50 32 -14 39 51 -14 52 43 -14 37 40 0.47 -180 0 0 -15 10 25 19 11 54.1 64 37 25 -15 15 46 -15 5 4 -15 17 57 -15 2 53 0.47 -179 0 0 -15 35 53 19 11 57.6 64 34 26 -15 41 15 -15 30 32 -15 43 26 -15 28 21 0.47 -178 0 0 -16 1 35 19 12 1.1 65 32 27 -16 6 57 -15 56 13 -16 9 9 -15 54 2 0.47 -177 0 0 -16 27 30 19 12 4.6 65 29 28 -16 32 52 -16 22 7 -16 35 4 -16 19 56 0.47 -176 0 0 -16 53 37 19 12 8.1 65 27 29 -16 59 0 -16 48 14 -17 1 12 -16 46 2 0.47 -175 0 0 -17 19 55 19 12 11.6 65 24 30 -17 25 19 -17 14 32 -17 27 31 -17 12 20 0.47 -174 0 0 -17 46 25 19 12 15.1 65 22 31 -17 51 49 -17 41 1 -17 54 1 -17 38 48 0.47 -173 0 0 -18 13 4 19 12 18.6 65 19 32 -18 18 29 -18 7 40 -18 20 42 -18 5 28 0.47 -172 0 0 -18 39 53 19 12 22.1 65 17 33 -18 45 18 -18 34 28 -18 47 31 -18 32 16 0.47 -171 0 0 -19 6 51 19 12 25.6 64 14 34 -19 12 16 -19 1 25 -19 14 29 -18 59 13 0.47 -170 0 0 -19 33 56 19 12 29.1 64 12 35 -19 39 22 -19 28 30 -19 41 35 -19 26 17 0.47 -169 0 0 -20 1 8 19 12 32.6 64 9 36 -20 6 35 -19 55 42 -20 8 48 -19 53 29 0.47 -168 0 0 -20 28 27 19 12 36.0 64 7 37 -20 33 54 -20 23 1 -20 36 7 -20 20 47 0.47 -167 0 0 -20 55 51 19 12 39.5 63 4 38 -21 1 18 -20 50 24 -21 3 32 -20 48 11 0.47 -166 0 0 -21 23 20 19 12 42.9 63 2 39 -21 28 47 -21 17 53 -21 31 1 -21 15 39 0.47 -165 0 0 -21 50 53 19 12 46.3 62 360 39 -21 56 20 -21 45 25 -21 58 34 -21 43 11 0.47 -164 0 0 -22 18 28 19 12 49.7 62 358 40 -22 23 56 -22 13 1 -22 26 10 -22 10 47 0.47 -163 0 0 -22 46 6 19 12 53.0 61 356 41 -22 51 34 -22 40 38 -22 53 49 -22 38 24 0.47 -162 0 0 -23 13 46 19 12 56.3 61 354 42 -23 19 14 -23 8 17 -23 21 28 -23 6 3 0.47 -161 0 0 -23 41 26 19 12 59.6 60 352 43 -23 46 54 -23 35 57 -23 49 9 -23 33 43 0.47 -160 0 0 -24 9 6 19 13 2.9 60 350 44 -24 14 35 -24 3 37 -24 16 49 -24 1 23 0.47 -159 0 0 -24 36 45 19 13 6.1 59 348 45 -24 42 14 -24 31 16 -24 44 28 -24 29 2 0.47 -158 0 0 -25 4 22 19 13 9.3 58 346 46 -25 9 51 -24 58 53 -25 12 6 -24 56 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20 0.47 -145 0 0 -30 55 10 19 13 47.5 48 329 56 -31 0 39 -30 49 42 -31 2 53 -30 47 28 0.47 -144 0 0 -31 21 6 19 13 50.1 48 327 56 -31 26 35 -31 15 38 -31 28 49 -31 13 24 0.47 -143 0 0 -31 46 50 19 13 52.7 47 326 57 -31 52 18 -31 41 22 -31 54 32 -31 39 8 0.47 -142 0 0 -32 12 21 19 13 55.2 46 325 58 -32 17 49 -32 6 54 -32 20 3 -32 4 40 0.47 -141 0 0 -32 37 39 19 13 57.7 45 324 58 -32 43 7 -32 32 12 -32 45 21 -32 29 58 0.47 -140 0 0 -33 2 43 19 14 0.2 44 323 59 -33 8 10 -32 57 16 -33 10 24 -32 55 3 0.47 -139 0 0 -33 27 33 19 14 2.5 43 322 59 -33 33 0 -33 22 6 -33 35 13 -33 19 53 0.47 -138 0 0 -33 52 8 19 14 4.9 43 321 60 -33 57 34 -33 46 41 -33 59 48 -33 44 28 0.47 -137 0 0 -34 16 27 19 14 7.2 42 321 60 -34 21 53 -34 11 1 -34 24 6 -34 8 48 0.47 -136 0 0 -34 40 31 19 14 9.4 41 320 61 -34 45 56 -34 35 5 -34 48 10 -34 32 52 0.47 -135 0 0 -35 4 18 19 14 11.6 40 319 61 -35 9 44 -34 58 53 -35 11 57 -34 56 41 0.47 -134 0 0 -35 27 49 19 14 13.7 39 318 61 -35 33 14 -35 22 25 -35 35 27 -35 20 12 0.47 -133 0 0 -35 51 3 19 14 15.8 38 317 62 -35 56 28 -35 45 39 -35 58 40 -35 43 27 0.47 -132 0 0 -36 14 0 19 14 17.8 38 316 62 -36 19 24 -36 8 36 -36 21 36 -36 6 24 0.47 -131 0 0 -36 36 39 19 14 19.8 37 315 62 -36 42 2 -36 31 16 -36 44 15 -36 29 4 0.47 -130 0 0 -36 59 0 19 14 21.7 36 314 62 -37 4 23 -36 53 37 -37 6 35 -36 51 26 0.47 -129 0 0 -37 21 3 19 14 23.6 35 314 63 -37 26 25 -37 15 41 -37 28 37 -37 13 29 0.47 -128 0 0 -37 42 47 19 14 25.4 34 313 63 -37 48 9 -37 37 25 -37 50 20 -37 35 14 0.47 -127 0 0 -38 4 12 19 14 27.2 33 312 63 -38 9 34 -37 58 51 -38 11 45 -37 56 40 0.47 -126 0 0 -38 25 19 19 14 28.9 33 311 63 -38 30 39 -38 19 58 -38 32 50 -38 17 47 0.47 -125 0 0 -38 46 6 19 14 30.6 32 310 63 -38 51 26 -38 40 46 -38 53 37 -38 38 35 0.47 -124 0 0 -39 6 33 19 14 32.2 31 310 63 -39 11 53 -39 1 14 -39 14 3 -38 59 3 0.47 -123 0 0 -39 26 41 19 14 33.8 30 309 63 -39 32 0 -39 21 22 -39 34 10 -39 19 12 0.47 -122 0 0 -39 46 29 19 14 35.3 29 308 63 -39 51 47 -39 41 11 -39 53 58 -39 39 1 0.47 -121 0 0 -40 5 57 19 14 36.8 29 307 63 -40 11 15 -40 0 40 -40 13 25 -39 58 30 0.47 -120 0 0 -40 25 5 19 14 38.2 28 307 63 -40 30 22 -40 19 48 -40 32 32 -40 17 39 0.47 -119 0 0 -40 43 52 19 14 39.6 27 306 63 -40 49 9 -40 38 36 -40 51 18 -40 36 27 0.47 -118 0 0 -41 2 20 19 14 40.9 26 305 63 -41 7 36 -40 57 4 -41 9 45 -40 54 55 0.47 -117 0 0 -41 20 26 19 14 42.2 25 304 63 -41 25 42 -41 15 11 -41 27 51 -41 13 3 0.47 -116 0 0 -41 38 13 19 14 43.5 25 304 62 -41 43 27 -41 32 58 -41 45 36 -41 30 50 0.47 -115 0 0 -41 55 38 19 14 44.7 24 303 62 -42 0 52 -41 50 24 -42 3 0 -41 48 16 0.47 -114 0 0 -42 12 43 19 14 45.8 23 302 62 -42 17 56 -42 7 30 -42 20 4 -42 5 22 0.47 -113 0 0 -42 29 27 19 14 46.9 22 301 62 -42 34 40 -42 24 15 -42 36 48 -42 22 7 0.47 -112 0 0 -42 45 51 19 14 48.0 21 301 61 -42 51 3 -42 40 39 -42 53 10 -42 38 31 0.47 -111 0 0 -43 1 53 19 14 49.0 21 300 61 -43 7 5 -42 56 42 -43 9 12 -42 54 35 0.47 -110 0 0 -43 17 35 19 14 50.0 20 299 61 -43 22 46 -43 12 25 -43 24 53 -43 10 18 0.47 -109 0 0 -43 32 56 19 14 50.9 19 298 60 -43 38 7 -43 27 46 -43 40 13 -43 25 40 0.47 -108 0 0 -43 47 57 19 14 51.8 18 298 60 -43 53 6 -43 42 47 -43 55 13 -43 40 41 0.47 -107 0 0 -44 2 36 19 14 52.7 18 297 60 -44 7 45 -43 57 27 -44 9 51 -43 55 21 0.47 -106 0 0 -44 16 55 19 14 53.5 17 296 59 -44 22 3 -44 11 47 -44 24 9 -44 9 41 0.47 -105 0 0 -44 30 53 19 14 54.3 16 296 59 -44 36 1 -44 25 46 -44 38 7 -44 23 40 0.47 -104 0 0 -44 44 31 19 14 55.1 15 295 59 -44 49 38 -44 39 24 -44 51 43 -44 37 18 0.47 -103 0 0 -44 57 47 19 14 55.8 15 294 58 -45 2 54 -44 52 41 -45 4 59 -44 50 36 0.47 -102 0 0 -45 10 44 19 14 56.4 14 293 58 -45 15 49 -45 5 38 -45 17 55 -45 3 33 0.47 -101 0 0 -45 23 19 19 14 57.0 13 293 57 -45 28 25 -45 18 14 -45 30 29 -45 16 9 0.47 -100 0 0 -45 35 34 19 14 57.6 12 292 57 -45 40 39 -45 30 30 -45 42 44 -45 28 25 0.47 - 99 0 0 -45 47 29 19 14 58.2 12 291 56 -45 52 33 -45 42 25 -45 54 38 -45 40 21 0.47 - 98 0 0 -45 59 3 19 14 58.7 11 290 56 -46 4 7 -45 54 0 -46 6 11 -45 51 56 0.47 - 97 0 0 -46 10 18 19 14 59.2 10 290 55 -46 15 21 -46 5 15 -46 17 25 -46 3 11 0.47 - 96 0 0 -46 21 11 19 14 59.6 10 289 55 -46 26 14 -46 16 9 -46 28 18 -46 14 6 0.48 - 95 0 0 -46 31 45 19 15 0.1 9 288 54 -46 36 47 -46 26 43 -46 38 51 -46 24 40 0.48 - 94 0 0 -46 41 59 19 15 0.4 8 287 54 -46 47 0 -46 36 57 -46 49 3 -46 34 54 0.48 - 93 0 0 -46 51 52 19 15 0.8 7 287 53 -46 56 53 -46 46 51 -46 58 56 -46 44 49 0.48 - 92 0 0 -47 1 26 19 15 1.1 7 286 53 -47 6 26 -46 56 26 -47 8 29 -46 54 23 0.48 - 91 0 0 -47 10 40 19 15 1.4 6 285 52 -47 15 40 -47 5 40 -47 17 42 -47 3 37 0.48 - 90 0 0 -47 19 34 19 15 1.6 5 285 52 -47 24 33 -47 14 34 -47 26 36 -47 12 32 0.48 - 89 0 0 -47 28 8 19 15 1.9 5 284 51 -47 33 7 -47 23 9 -47 35 9 -47 21 7 0.49 - 88 0 0 -47 36 22 19 15 2.0 4 283 51 -47 41 21 -47 31 24 -47 43 23 -47 29 22 0.49 - 87 0 0 -47 44 18 19 15 2.2 3 282 50 -47 49 16 -47 39 19 -47 51 18 -47 37 18 0.50 - 86 0 0 -47 51 53 19 15 2.3 3 282 50 -47 56 51 -47 46 55 -47 58 53 -47 44 54 0.51 - 85 0 0 -47 59 9 19 15 2.4 2 281 49 -48 4 7 -47 54 12 -48 6 8 -47 52 11 0.52 - 84 0 0 -48 6 6 19 15 2.5 1 280 49 -48 11 3 -48 1 9 -48 13 5 -47 59 8 0.55 - 83 0 0 -48 12 44 19 15 2.5 1 279 48 -48 17 40 -48 7 47 -48 19 42 -48 5 46 0.66 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 260-00239-1 * constellation : Sextans * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 49 37.9398 DE: +05 59 47.954 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 49 37.9399 DE: +05 59 47.954 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (299) Thora asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.89020 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#64 date of fit: 2023 Feb 11 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): 0.012", 0.002", 111.573° remarks: * orbital elements for (299)Thora : Mean anomaly = 102.9106460428 deg Arg. of pericenter = 150.8786832050 deg Long. of node = 241.4075459582 deg Inclination = 1.6086311988 deg Eccentricity = 0.0627944468 Semimajor axis = 2.4333483578 AU Perihelion dist = 2.2805475937 AU Mag: H = 11.41, G = 0.15 Epoch of elements : MJD 60613.80013362 TDT (2024 Oct 30.8001) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#642023Feb11,0.49,2024,10,30,19.203207,-0.167585,-0.390408,17.468993,-7.505494,-0.004431,0.001738,-0.000001,0.000000 -164.9127,5.8671,-112.14,-14.13,False TYC 260-00239-1,10.82720546,5.9966542,11.31,11.09,10.97,0.0,0,,10.84847623,5.8671480,5.58,5.25,0,0,0 299,Thora,16.66,16.356,2.8902,0,0,3.562,-22.84,,1.2,0 0,102.7029,2024,10,30,150.8787,241.4075,1.6086,0.06279,2.43335,2.28055,11.41,5.0,0.15 1.204,0.0117,0.0016,112,0.0016,Known errors,1.06,0,-1,-1 20241030_0239-1,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org