IOTA/IOTA-ES occultation update for (178) Belisana / UCAC4 571-023749 event on 2024 Oct 11, 00:23 UT Visible from Summary ------- On 2024 Oct 11 UT, the 37.031 km diameter asteroid (178) Belisana will occult a 11.6 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.66 mag to 14.13 mag (the magnitude of the asteroid) for at most 4.730 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 11, 00:12 - 2024 Oct 11, 00:34 * geocentric midpoint of event [JD]: 2460594.51628596 * magnitude of target star: 11.57 * magnitude drop [mag]: 2.66 * estimated maximum duration [s]: 4.730 * Moon: 52 % sunlit, 161° distance * Sun: 107° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.005", 89°) * approx speed of asteroid's shadow [km/s]: 7.8225 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 571-023749 by 178 Belisana on 2024 Oct 11 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 0 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -39 31 7 .. .. .. -39 24 44 .... 1 0 0 -39 16 53 0 12 51.6 1 57 -43 -39 31 51 -39 1 59 -39 38 18 -38 55 36 .... 2 0 0 -38 47 37 0 12 52.0 2 57 -44 -39 2 34 -38 32 44 -39 9 0 -38 26 21 0.45 3 0 0 -38 18 14 0 12 52.6 3 56 -44 -38 33 10 -38 3 22 -38 39 37 -37 56 59 0.56 4 0 0 -37 48 46 0 12 53.5 4 56 -44 -38 3 41 -37 33 55 -38 10 7 -37 27 33 0.61 5 0 0 -37 19 14 0 12 54.7 5 55 -44 -37 34 8 -37 4 23 -37 40 33 -36 58 2 0.64 6 0 0 -36 49 38 0 12 56.2 5 54 -45 -37 4 31 -36 34 48 -37 10 55 -36 28 27 0.66 7 0 0 -36 19 59 0 12 57.9 6 54 -45 -36 34 50 -36 5 11 -36 41 15 -35 58 50 0.68 8 0 0 -35 50 18 0 13 0.0 7 53 -45 -36 5 8 -35 35 31 -36 11 32 -35 29 11 0.69 9 0 0 -35 20 36 0 13 2.4 8 52 -45 -35 35 25 -35 5 51 -35 41 49 -34 59 31 0.70 10 0 0 -34 50 55 0 13 5.0 9 52 -45 -35 5 43 -34 36 11 -35 12 5 -34 29 52 0.71 11 0 0 -34 21 15 0 13 8.0 10 51 -45 -34 36 1 -34 6 32 -34 42 23 -34 0 14 0.71 12 0 0 -33 51 36 0 13 11.3 11 51 -45 -34 6 21 -33 36 55 -34 12 42 -33 30 38 0.72 13 0 0 -33 22 1 0 13 14.9 12 50 -46 -33 36 44 -33 7 22 -33 43 4 -33 1 5 0.72 14 0 0 -32 52 30 0 13 18.8 13 50 -46 -33 7 11 -32 37 52 -33 13 31 -32 31 36 0.73 15 0 0 -32 23 4 0 13 23.0 14 49 -46 -32 37 43 -32 8 28 -32 44 2 -32 2 13 0.73 16 0 0 -31 53 44 0 13 27.5 15 48 -45 -32 8 21 -31 39 10 -32 14 40 -31 32 55 0.73 17 0 0 -31 24 31 0 13 32.4 16 48 -45 -31 39 7 -31 9 59 -31 45 24 -31 3 45 0.74 18 0 0 -30 55 26 0 13 37.5 17 47 -45 -31 10 0 -30 40 56 -31 16 16 -30 34 43 0.74 19 0 0 -30 26 30 0 13 43.0 18 47 -45 -30 41 2 -30 12 2 -30 47 18 -30 5 50 0.74 20 0 0 -29 57 45 0 13 48.8 19 46 -45 -30 12 14 -29 43 18 -30 18 29 -29 37 7 0.74 21 0 0 -29 29 10 0 13 54.9 20 45 -45 -29 43 37 -29 14 46 -29 49 51 -29 8 35 0.74 22 0 0 -29 0 47 0 14 1.4 21 45 -45 -29 15 13 -28 46 25 -29 21 25 -28 40 16 0.75 23 0 0 -28 32 37 0 14 8.1 22 44 -44 -28 47 1 -28 18 17 -28 53 13 -28 12 9 0.75 24 0 0 -28 4 42 0 14 15.1 23 43 -44 -28 19 3 -27 50 24 -28 25 14 -27 44 16 0.75 25 0 0 -27 37 1 0 14 22.5 24 43 -44 -27 51 20 -27 22 45 -27 57 30 -27 16 38 0.75 26 0 0 -27 9 36 0 14 30.1 25 42 -43 -27 23 52 -26 55 22 -27 30 1 -26 49 16 0.75 27 0 0 -26 42 27 0 14 38.1 26 42 -43 -26 56 41 -26 28 16 -27 2 49 -26 22 11 0.76 28 0 0 -26 15 36 0 14 46.3 27 41 -42 -26 29 48 -26 1 27 -26 35 55 -25 55 24 0.76 29 0 0 -25 49 4 0 14 54.9 28 40 -42 -26 3 14 -25 34 57 -26 9 20 -25 28 55 0.76 30 0 0 -25 22 51 0 15 3.7 29 40 -42 -25 36 58 -25 8 47 -25 43 3 -25 2 45 0.76 31 0 0 -24 56 58 0 15 12.8 29 39 -41 -25 11 3 -24 42 57 -25 17 8 -24 36 56 0.76 32 0 0 -24 31 27 0 15 22.2 30 38 -40 -24 45 29 -24 17 27 -24 51 32 -24 11 27 0.76 33 0 0 -24 6 17 0 15 31.9 31 37 -40 -24 20 17 -23 52 20 -24 26 19 -23 46 21 0.76 34 0 0 -23 41 30 0 15 41.8 32 37 -39 -23 55 28 -23 27 35 -24 1 29 -23 21 37 0.77 35 0 0 -23 17 6 0 15 52.0 33 36 -39 -23 31 1 -23 3 13 -23 37 1 -22 57 16 0.77 36 0 0 -22 53 6 0 16 2.5 34 35 -38 -23 6 59 -22 39 16 -23 12 58 -22 33 20 0.77 37 0 0 -22 29 31 0 16 13.2 35 34 -37 -22 43 22 -22 15 43 -22 49 20 -22 9 48 0.77 38 0 0 -22 6 22 0 16 24.1 36 34 -37 -22 20 11 -21 52 36 -22 26 8 -21 46 42 0.77 39 0 0 -21 43 39 0 16 35.3 37 33 -36 -21 57 25 -21 29 55 -22 3 21 -21 24 2 0.77 40 0 0 -21 21 23 0 16 46.7 37 32 -35 -21 35 7 -21 7 42 -21 41 2 -21 1 49 0.77 41 0 0 -20 59 34 0 16 58.3 38 31 -35 -21 13 16 -20 45 55 -21 19 10 -20 40 4 0.77 42 0 0 -20 38 14 0 17 10.2 39 30 -34 -20 51 53 -20 24 37 -20 57 47 -20 18 47 0.78 43 0 0 -20 17 22 0 17 22.2 40 29 -33 -20 30 59 -20 3 47 -20 36 52 -19 57 58 0.78 44 0 0 -19 56 59 0 17 34.5 41 28 -32 -20 10 35 -19 43 27 -20 16 26 -19 37 38 0.78 45 0 0 -19 37 7 0 17 46.9 41 27 -32 -19 50 40 -19 23 36 -19 56 30 -19 17 49 0.78 46 0 0 -19 17 44 0 17 59.6 42 26 -31 -19 31 15 -19 4 16 -19 37 5 -18 58 29 0.78 47 0 0 -18 58 53 0 18 12.4 43 25 -30 -19 12 22 -18 45 26 -19 18 10 -18 39 41 0.78 48 0 0 -18 40 33 0 18 25.4 43 24 -29 -18 54 0 -18 27 8 -18 59 47 -18 21 23 0.78 49 0 0 -18 22 44 0 18 38.5 44 23 -28 -18 36 9 -18 9 22 -18 41 56 -18 3 38 0.78 50 0 0 -18 5 28 0 18 51.8 45 22 -27 -18 18 51 -17 52 8 -18 24 37 -17 46 24 0.79 51 0 0 -17 48 45 0 19 5.3 45 21 -27 -18 2 6 -17 35 26 -18 7 51 -17 29 43 0.79 52 0 0 -17 32 34 0 19 18.9 46 20 -26 -17 45 53 -17 19 17 -17 51 38 -17 13 35 0.79 53 0 0 -17 16 56 0 19 32.6 47 18 -25 -17 30 14 -17 3 41 -17 35 58 -16 58 0 0.79 54 0 0 -17 1 53 0 19 46.4 47 17 -24 -17 15 9 -16 48 39 -17 20 52 -16 42 59 0.79 55 0 0 -16 47 23 0 20 0.4 48 16 -23 -17 0 37 -16 34 11 -17 6 19 -16 28 32 0.79 56 0 0 -16 33 28 0 20 14.4 48 14 -22 -16 46 40 -16 20 17 -16 52 22 -16 14 39 0.79 57 0 0 -16 20 7 0 20 28.6 49 13 -21 -16 33 18 -16 6 58 -16 38 59 -16 1 20 0.79 58 0 0 -16 7 21 0 20 42.8 49 12 -20 -16 20 30 -15 54 14 -16 26 10 -15 48 36 0.79 59 0 0 -15 55 10 0 20 57.1 49 10 -19 -16 8 18 -15 42 4 -16 13 57 -15 36 27 0.79 60 0 0 -15 43 34 0 21 11.5 50 9 -18 -15 56 41 -15 30 30 -16 2 20 -15 24 54 0.79 61 0 0 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38 -13 54 51 -14 26 12 -13 49 20 0.80 74 0 0 -14 4 38 0 24 36.3 51 347 -5 -14 17 33 -13 51 46 -14 23 6 -13 46 15 0.80 75 0 0 -14 2 10 0 24 50.9 51 346 -4 -14 15 4 -13 49 18 -14 20 37 -13 43 47 0.80 76 0 0 -14 0 19 0 25 5.4 50 345 -3 -14 13 12 -13 47 27 -14 18 46 -13 41 56 0.80 77 0 0 -13 59 4 0 25 19.8 50 343 -2 -14 11 58 -13 46 13 -14 17 31 -13 40 42 0.80 78 0 0 -13 58 27 0 25 34.2 50 342 0 -14 11 20 -13 45 36 -14 16 54 -13 40 5 0.80 79 0 0 -13 58 27 0 25 48.5 50 340 1 -14 11 20 -13 45 36 -14 16 53 -13 40 5 0.80 80 0 0 -13 59 3 0 26 2.7 49 339 2 -14 11 57 -13 46 12 -14 17 30 -13 40 42 0.80 81 0 0 -14 0 17 0 26 16.9 49 338 3 -14 13 10 -13 47 26 -14 18 44 -13 41 55 0.80 82 0 0 -14 2 7 0 26 30.9 48 336 4 -14 15 1 -13 49 16 -14 20 34 -13 43 45 0.80 83 0 0 -14 4 35 0 26 44.9 48 335 5 -14 17 28 -13 51 43 -14 23 2 -13 46 12 0.80 84 0 0 -14 7 39 0 26 58.7 47 334 6 -14 20 33 -13 54 47 -14 26 6 -13 49 16 0.80 85 0 0 -14 11 19 0 27 12.5 47 332 7 -14 24 14 -13 58 27 -14 29 47 -13 52 56 0.80 86 0 0 -14 15 36 0 27 26.1 46 331 8 -14 28 31 -14 2 44 -14 34 5 -13 57 12 0.80 87 0 0 -14 20 30 0 27 39.6 46 330 9 -14 33 25 -14 7 37 -14 38 59 -14 2 5 0.80 88 0 0 -14 26 0 0 27 52.9 45 329 10 -14 38 56 -14 13 6 -14 44 30 -14 7 34 0.80 89 0 0 -14 32 6 0 28 6.1 45 328 11 -14 45 2 -14 19 11 -14 50 37 -14 13 39 0.80 90 0 0 -14 38 48 0 28 19.2 44 327 12 -14 51 45 -14 25 53 -14 57 20 -14 20 20 0.80 91 0 0 -14 46 6 0 28 32.1 43 326 13 -14 59 4 -14 33 10 -15 4 39 -14 27 37 0.80 92 0 0 -14 53 59 0 28 44.8 43 325 14 -15 6 58 -14 41 3 -15 12 34 -14 35 30 0.80 93 0 0 -15 2 29 0 28 57.4 42 324 15 -15 15 28 -14 49 31 -15 21 4 -14 43 57 0.80 94 0 0 -15 11 33 0 29 9.8 41 323 16 -15 24 34 -14 58 34 -15 30 10 -14 53 1 0.80 95 0 0 -15 21 13 0 29 22.0 40 322 17 -15 34 15 -15 8 13 -15 39 51 -15 2 39 0.80 96 0 0 -15 31 27 0 29 34.1 40 321 18 -15 44 30 -15 18 27 -15 50 8 -15 12 52 0.80 97 0 0 -15 42 16 0 29 45.9 39 320 19 -15 55 21 -15 29 15 -16 0 59 -15 23 39 0.80 98 0 0 -15 53 40 0 29 57.5 38 320 20 -16 6 46 -15 40 37 -16 12 24 -15 35 1 0.80 99 0 0 -16 5 38 0 30 9.0 37 319 21 -16 18 45 -15 52 34 -16 24 24 -15 46 57 0.80 100 0 0 -16 18 10 0 30 20.2 36 318 22 -16 31 18 -16 5 4 -16 36 58 -15 59 27 0.80 101 0 0 -16 31 16 0 30 31.2 36 317 23 -16 44 25 -16 18 8 -16 50 5 -16 12 31 0.79 102 0 0 -16 44 54 0 30 42.0 35 317 24 -16 58 5 -16 31 46 -17 3 46 -16 26 8 0.79 103 0 0 -16 59 6 0 30 52.6 34 316 25 -17 12 19 -16 45 56 -17 18 0 -16 40 17 0.79 104 0 0 -17 13 51 0 31 2.9 33 315 26 -17 27 5 -17 0 39 -17 32 47 -16 55 0 0.79 105 0 0 -17 29 8 0 31 12.9 32 315 27 -17 42 23 -17 15 54 -17 48 6 -17 10 14 0.79 106 0 0 -17 44 56 0 31 22.8 31 314 28 -17 58 14 -17 31 42 -18 3 57 -17 26 1 0.79 107 0 0 -18 1 17 0 31 32.4 30 313 29 -18 14 36 -17 48 0 -18 20 20 -17 42 19 0.79 108 0 0 -18 18 9 0 31 41.7 29 313 30 -18 31 29 -18 4 50 -18 37 14 -17 59 8 0.79 109 0 0 -18 35 31 0 31 50.7 29 312 31 -18 48 54 -18 22 11 -18 54 39 -18 16 28 0.79 110 0 0 -18 53 24 0 31 59.5 28 312 32 -19 6 48 -18 40 2 -19 12 35 -18 34 18 0.79 111 0 0 -19 11 46 0 32 8.0 27 311 33 -19 25 13 -18 58 22 -19 31 0 -18 52 38 0.79 112 0 0 -19 30 38 0 32 16.3 26 311 34 -19 44 7 -19 17 13 -19 49 55 -19 11 27 0.79 113 0 0 -19 49 59 0 32 24.2 25 310 35 -20 3 30 -19 36 32 -20 9 19 -19 30 45 0.79 114 0 0 -20 9 49 0 32 31.9 24 310 36 -20 23 21 -19 56 19 -20 29 11 -19 50 32 0.79 115 0 0 -20 30 6 0 32 39.3 23 309 37 -20 43 40 -20 16 34 -20 49 31 -20 10 46 0.79 116 0 0 -20 50 51 0 32 46.4 22 309 38 -21 4 27 -20 37 17 -21 10 19 -20 31 28 0.79 117 0 0 -21 12 2 0 32 53.2 21 308 38 -21 25 41 -20 58 27 -21 31 33 -20 52 37 0.79 118 0 0 -21 33 40 0 32 59.7 20 308 39 -21 47 21 -21 20 2 -21 53 14 -21 14 12 0.79 119 0 0 -21 55 44 0 33 5.9 19 307 40 -22 9 26 -21 42 4 -22 15 21 -21 36 12 0.79 120 0 0 -22 18 12 0 33 11.7 18 307 41 -22 31 57 -22 4 30 -22 37 52 -21 58 37 0.79 121 0 0 -22 41 5 0 33 17.3 17 306 42 -22 54 52 -22 27 21 -23 0 48 -22 21 27 0.79 122 0 0 -23 4 21 0 33 22.6 16 306 43 -23 18 11 -22 50 35 -23 24 8 -22 44 41 0.79 123 0 0 -23 28 1 0 33 27.5 15 305 44 -23 41 53 -23 14 13 -23 47 51 -23 8 17 0.79 124 0 0 -23 52 3 0 33 32.1 14 305 44 -24 5 57 -23 38 12 -24 11 56 -23 32 16 0.79 125 0 0 -24 16 27 0 33 36.5 13 304 45 -24 30 23 -24 2 34 -24 36 23 -23 56 37 0.79 126 0 0 -24 41 12 0 33 40.4 12 304 46 -24 55 10 -24 27 17 -25 1 11 -24 21 19 0.79 127 0 0 -25 6 17 0 33 44.1 11 303 47 -25 20 17 -24 52 19 -25 26 19 -24 46 20 0.79 128 0 0 -25 31 41 0 33 47.4 10 303 47 -25 45 44 -25 17 42 -25 51 47 -25 11 42 0.79 129 0 0 -25 57 24 0 33 50.5 9 302 48 -26 11 29 -25 43 22 -26 17 33 -25 37 22 0.79 130 0 0 -26 23 25 0 33 53.2 8 302 49 -26 37 32 -26 9 21 -26 43 37 -26 3 19 0.80 131 0 0 -26 49 44 0 33 55.6 7 302 50 -27 3 53 -26 35 37 -27 9 59 -26 29 35 0.80 132 0 0 -27 16 18 0 33 57.6 6 301 50 -27 30 29 -27 2 10 -27 36 36 -26 56 6 0.80 133 0 0 -27 43 8 0 33 59.3 5 301 51 -27 57 22 -27 28 58 -28 3 29 -27 22 53 0.81 134 0 0 -28 10 13 0 34 0.8 4 300 51 -28 24 28 -27 56 0 -28 30 37 -27 49 55 0.82 135 0 0 -28 37 31 0 34 1.9 3 300 52 -28 51 49 -28 23 16 -28 57 59 -28 17 10 0.83 136 0 0 -29 5 2 0 34 2.6 2 299 53 -29 19 22 -28 50 46 -29 25 33 -28 44 38 0.86 137 0 0 -29 32 46 0 34 3.1 1 299 53 -29 47 8 -29 18 27 -29 53 19 -29 12 19 0.94 138 0 0 -30 0 41 0 34 3.3 0 298 54 .. .. .. -29 46 20 .. .. .. -29 40 11 2.77 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 571-023749 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 05 02.9810 DE: +24 09 28.029 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 05 02.9810 DE: +24 09 28.029 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.6 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (178) Belisana asteroid class: approx. diameter [km]: 37 approx. diameter ["]: 0.024 distance from Earth [AU]: 2.08920 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 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): 0.020", 0.005", 89.152° remarks: * orbital elements for (178)Belisana : Mean anomaly = 163.6041058692 deg Arg. of pericenter = 213.2593418221 deg Long. of node = 51.0898237251 deg Inclination = 1.8919744869 deg Eccentricity = 0.0417569543 Semimajor axis = 2.4621857858 AU Perihelion dist = 2.3593724066 AU Mag: H = 9.44, G = 0.15 Epoch of elements : MJD 60594.01628575 TDT (2024 Oct 11.0163) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Apr24,4.73,2024,10,11,0.390863,0.060620,-0.621266,4.394446,0.427781,-0.005436,0.000044,0.000000,0.000000 65.6880,24.1568,170.82,-7.13,False UCAC4 571-023749,6.08416137,24.1577859,11.76,11.57,11.47,0.0,4,,6.10952368,24.1568270,2.66,2.35,0,0,0 178,Belisana,14.13,37.031,2.0892,0,0,1.352,1.80,,3.2,0 0,163.3448,2024,10,10,213.2593,51.0898,1.8920,0.04176,2.46219,2.35937,9.43,5.0,0.15 1.215,0.0203,0.0050,89,0.0053,Known errors,1.12,0,-1,-1 20241011_023749,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org