IOTA/IOTA-ES occultation update for (123) Brunhild / HIP 54857 event on 2024 Dec 22, 15:11 UT Visible from Summary ------- On 2024 Dec 22 UT, the 46.1835651611216 km diameter asteroid (123) Brunhild will occult a 6.7 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.05 mag to 13.72 mag (the magnitude of the asteroid) for at most 4.440 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: 100 * date and approx. time of event: 2024 Dec 22, 15:01 - 2024 Dec 22, 15:21 * geocentric midpoint of event [JD]: 2460667.13297633 * magnitude of target star: 6.67 * magnitude drop [mag]: 7.05 * estimated maximum duration [s]: 4.440 * Moon: 53 % sunlit, 9° distance * Sun: 102° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 119°) * approx speed of asteroid's shadow [km/s]: 10.4718 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 54857 by 123 Brunhild on 2024 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 121 0 0 30 57 2 15 1 29.8 0 88 -76 30 44 19 31 9 46 30 41 50 31 12 15 .... 122 0 0 30 58 42 15 1 30.0 1 88 -77 30 45 58 31 11 25 30 43 29 31 13 54 0.09 123 0 0 30 59 46 15 1 30.2 2 89 -77 30 47 3 31 12 29 30 44 34 31 14 58 0.12 124 0 0 31 0 16 15 1 30.6 3 89 -78 30 47 32 31 12 59 30 45 3 31 15 27 0.13 125 0 0 31 0 10 15 1 31.2 4 90 -79 30 47 27 31 12 53 30 44 58 31 15 22 0.14 126 0 0 30 59 30 15 1 31.9 5 90 -79 30 46 46 31 12 13 30 44 18 31 14 42 0.14 127 0 0 30 58 15 15 1 32.7 6 91 -80 30 45 31 31 10 58 30 43 2 31 13 27 0.14 128 0 0 30 56 24 15 1 33.7 6 91 -80 30 43 40 31 9 8 30 41 11 31 11 37 0.14 129 0 0 30 53 59 15 1 34.8 7 92 -81 30 41 14 31 6 43 30 38 45 31 9 12 0.15 130 0 0 30 50 58 15 1 36.1 8 92 -81 30 38 12 31 3 42 30 35 43 31 6 11 0.15 131 0 0 30 47 21 15 1 37.5 9 93 -82 30 34 35 31 0 6 30 32 6 31 2 36 0.15 132 0 0 30 43 9 15 1 39.0 10 93 -82 30 30 22 30 55 55 30 27 53 30 58 24 0.15 133 0 0 30 38 21 15 1 40.7 11 94 -82 30 25 33 30 51 8 30 23 4 30 53 38 0.15 134 0 0 30 32 57 15 1 42.5 12 94 -83 30 20 8 30 45 45 30 17 39 30 48 15 0.15 135 0 0 30 26 57 15 1 44.5 13 95 -83 30 14 7 30 39 46 30 11 37 30 42 16 0.15 136 0 0 30 20 21 15 1 46.6 13 95 -83 30 7 30 30 33 11 30 4 59 30 35 41 0.15 137 0 0 30 13 8 15 1 48.9 14 96 -83 30 0 15 30 25 59 29 57 45 30 28 30 0.15 138 0 0 30 5 18 15 1 51.3 15 96 -82 29 52 24 30 18 11 29 49 53 30 20 41 0.16 139 0 0 29 56 51 15 1 53.8 16 97 -82 29 43 56 30 9 45 29 41 25 30 12 16 0.16 140 0 0 29 47 47 15 1 56.6 17 97 -82 29 34 50 30 0 43 29 32 19 30 3 14 0.16 141 0 0 29 38 5 15 1 59.4 18 98 -81 29 25 7 29 51 3 29 22 35 29 53 34 0.16 142 0 0 29 27 46 15 2 2.5 19 98 -81 29 14 46 29 40 45 29 12 13 29 43 17 0.16 143 0 0 29 16 48 15 2 5.7 20 99 -80 29 3 46 29 29 49 29 1 13 29 32 22 0.16 144 0 0 29 5 12 15 2 9.0 21 99 -79 28 52 8 29 18 15 28 49 35 29 20 48 0.16 145 0 0 28 52 57 15 2 12.5 21 100 -79 28 39 51 29 6 2 28 37 17 29 8 35 0.16 146 0 0 28 40 3 15 2 16.2 22 100 -78 28 26 54 28 53 10 28 24 21 28 55 44 0.16 147 0 0 28 26 29 15 2 20.0 23 101 -77 28 13 18 28 39 39 28 10 44 28 42 13 0.16 148 0 0 28 12 16 15 2 24.0 24 101 -77 27 59 3 28 25 28 27 56 28 28 28 3 0.16 149 0 0 27 57 22 15 2 28.2 25 102 -76 27 44 7 28 10 37 27 41 31 28 13 12 0.16 150 0 0 27 41 48 15 2 32.6 26 102 -75 27 28 30 27 55 6 27 25 54 27 57 41 0.16 151 0 0 27 25 33 15 2 37.1 27 102 -74 27 12 12 27 38 53 27 9 36 27 41 29 0.16 152 0 0 27 8 37 15 2 41.8 28 103 -73 26 55 13 27 22 0 26 52 36 27 24 36 0.16 153 0 0 26 50 58 15 2 46.7 29 103 -72 26 37 31 27 4 25 26 34 54 27 7 2 0.16 154 0 0 26 32 38 15 2 51.8 30 104 -72 26 19 8 26 46 7 26 16 30 26 48 45 0.16 155 0 0 26 13 35 15 2 57.0 31 104 -71 26 0 2 26 27 8 25 57 23 26 29 46 0.16 156 0 0 25 53 49 15 3 2.5 32 105 -70 25 40 13 26 7 25 25 37 33 26 10 4 0.16 157 0 0 25 33 20 15 3 8.1 33 105 -69 25 19 40 25 46 59 25 17 0 25 49 39 0.16 158 0 0 25 12 7 15 3 14.0 34 105 -68 24 58 23 25 25 49 24 55 43 25 28 30 0.16 159 0 0 24 50 9 15 3 20.0 35 106 -67 24 36 22 25 3 55 24 33 41 25 6 36 0.16 160 0 0 24 27 27 15 3 26.2 36 106 -66 24 13 36 24 41 17 24 10 54 24 43 59 0.16 161 0 0 24 4 0 15 3 32.7 37 106 -65 23 50 5 24 17 53 23 47 23 24 20 36 0.16 162 0 0 23 39 47 15 3 39.4 38 107 -64 23 25 49 23 53 45 23 23 5 23 56 28 0.17 163 0 0 23 14 48 15 3 46.2 39 107 -63 23 0 46 23 28 50 22 58 2 23 31 34 0.17 164 0 0 22 49 3 15 3 53.3 40 107 -62 22 34 57 23 3 9 22 32 12 23 5 54 0.17 165 0 0 22 22 31 15 4 0.6 41 108 -61 22 8 21 22 36 41 22 5 35 22 39 27 0.17 166 0 0 21 55 13 15 4 8.1 42 108 -60 21 40 58 22 9 27 21 38 11 22 12 13 0.17 167 0 0 21 27 6 15 4 15.9 43 108 -59 21 12 47 21 41 25 21 10 0 21 44 12 0.17 168 0 0 20 58 12 15 4 23.8 44 108 -58 20 43 49 21 12 35 20 41 0 21 15 24 0.17 169 0 0 20 28 30 15 4 32.0 45 108 -57 20 14 2 20 42 58 20 11 13 20 45 47 0.17 170 0 0 19 58 0 15 4 40.4 46 109 -56 19 43 27 20 12 32 19 40 37 20 15 22 0.17 171 0 0 19 26 41 15 4 49.1 47 109 -55 19 12 4 19 41 18 19 9 12 19 44 9 0.17 172 0 0 18 54 33 15 4 58.0 48 109 -54 18 39 51 19 9 15 18 36 59 19 12 7 0.17 173 0 0 18 21 37 15 5 7.1 50 109 -53 18 6 50 18 36 23 18 3 57 18 39 16 0.17 174 0 0 17 47 51 15 5 16.5 51 109 -52 17 32 59 18 2 42 17 30 5 18 5 36 0.17 175 0 0 17 13 16 15 5 26.1 52 109 -51 16 58 19 17 28 12 16 55 24 17 31 6 0.17 176 0 0 16 37 52 15 5 35.9 53 109 -49 16 22 50 16 52 53 16 19 54 16 55 48 0.17 177 0 0 16 1 39 15 5 46.0 54 109 -48 15 46 32 16 16 44 15 43 35 16 19 41 0.17 178 0 0 15 24 36 15 5 56.3 55 109 -47 15 9 24 15 39 47 15 6 27 15 42 45 0.17 179 0 0 14 46 45 15 6 6.8 56 109 -46 14 31 28 15 2 1 14 28 29 15 4 59 0.16 -180 0 0 14 8 5 15 6 17.6 58 109 -45 13 52 43 14 23 26 13 49 43 14 26 25 0.16 -179 0 0 13 28 37 15 6 28.6 59 109 -44 13 13 10 13 44 3 13 10 9 13 47 3 0.16 -178 0 0 12 48 20 15 6 39.9 60 108 -42 12 32 49 13 3 52 12 29 47 13 6 53 0.16 -177 0 0 12 7 17 15 6 51.4 61 108 -41 11 51 40 12 22 53 11 48 37 12 25 55 0.16 -176 0 0 11 25 26 15 7 3.1 62 107 -40 11 9 44 11 41 7 11 6 40 11 44 11 0.16 -175 0 0 10 42 49 15 7 15.1 63 107 -39 10 27 2 10 58 35 10 23 58 11 1 40 0.16 -174 0 0 9 59 27 15 7 27.2 65 106 -38 9 43 35 10 15 18 9 40 29 10 18 23 0.16 -173 0 0 9 15 20 15 7 39.6 66 106 -36 8 59 23 9 31 16 8 56 17 9 34 22 0.16 -172 0 0 8 30 30 15 7 52.2 67 105 -35 8 14 28 8 46 30 8 11 21 8 49 38 0.16 -171 0 0 7 44 57 15 8 5.0 68 104 -34 7 28 50 8 1 2 7 25 42 8 4 10 0.16 -170 0 0 6 58 43 15 8 18.0 69 103 -33 6 42 32 7 14 53 6 39 22 7 18 2 0.16 -169 0 0 6 11 48 15 8 31.2 71 101 -31 5 55 33 6 28 3 5 52 23 6 31 13 0.16 -168 0 0 5 24 16 15 8 44.5 72 100 -30 5 7 56 5 40 35 5 4 45 5 43 45 0.16 -167 0 0 4 36 6 15 8 58.0 73 98 -29 4 19 42 4 52 29 4 16 30 4 55 41 0.16 -166 0 0 3 47 22 15 9 11.7 74 95 -28 3 30 53 4 3 49 3 27 41 4 7 1 0.16 -165 0 0 2 58 4 15 9 25.6 75 93 -26 2 41 31 3 14 35 2 38 18 3 17 48 0.16 -164 0 0 2 8 14 15 9 39.5 76 90 -25 1 51 38 2 24 49 1 48 24 2 28 3 0.16 -163 0 0 1 17 55 15 9 53.6 77 86 -24 1 1 15 1 34 34 0 58 0 1 37 48 0.16 -162 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15 13 1.6 78 355 -6 -10 19 28 - 9 45 21 -10 22 48 - 9 42 2 0.15 -149 0 0 -10 55 12 15 13 15.9 77 350 -5 -11 12 15 -10 38 9 -11 15 35 -10 34 49 0.15 -148 0 0 -11 47 49 15 13 30.0 76 347 -4 -12 4 52 -11 30 46 -12 8 12 -11 27 27 0.15 -147 0 0 -12 40 13 15 13 44.1 75 343 -2 -12 57 16 -12 23 11 -13 0 35 -12 19 52 0.14 -146 0 0 -13 32 22 15 13 58.0 73 341 -1 -13 49 24 -13 15 21 -13 52 43 -13 12 2 0.14 -145 0 0 -14 24 13 15 14 11.7 72 338 0 -14 41 14 -14 7 13 -14 44 33 -14 3 55 0.14 -144 0 0 -15 15 43 15 14 25.3 71 336 1 -15 32 43 -14 58 45 -15 36 1 -14 55 27 0.14 -143 0 0 -16 6 51 15 14 38.7 70 334 3 -16 23 48 -15 49 55 -16 27 7 -15 46 36 0.14 -142 0 0 -16 57 33 15 14 52.0 69 333 4 -17 14 28 -16 40 39 -17 17 46 -16 37 21 0.14 -141 0 0 -17 47 48 15 15 5.0 68 331 5 -18 4 40 -17 30 55 -18 7 58 -17 27 38 0.14 -140 0 0 -18 37 32 15 15 17.8 66 330 6 -18 54 23 -18 20 43 -18 57 40 -18 17 26 0.14 -139 0 0 -19 26 46 15 15 30.4 65 328 8 -19 43 33 -19 9 59 -19 46 50 -19 6 42 0.14 -138 0 0 -20 15 25 15 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25.2 37 308 34 -36 22 49 -35 52 54 -36 25 44 -35 49 59 0.13 -113 0 0 -36 37 50 15 19 31.4 37 307 35 -36 52 43 -36 22 58 -36 55 37 -36 20 4 0.13 -112 0 0 -37 7 3 15 19 37.4 36 307 36 -37 21 51 -36 52 15 -37 24 45 -36 49 22 0.13 -111 0 0 -37 35 31 15 19 43.3 35 306 37 -37 50 14 -37 20 48 -37 53 7 -37 17 56 0.13 -110 0 0 -38 3 14 15 19 48.9 34 305 37 -38 17 53 -37 48 35 -38 20 44 -37 45 44 0.13 -109 0 0 -38 30 12 15 19 54.3 33 304 38 -38 44 47 -38 15 38 -38 47 38 -38 12 48 0.13 -108 0 0 -38 56 27 15 19 59.5 32 304 39 -39 10 57 -38 41 58 -39 13 47 -38 39 8 0.13 -107 0 0 -39 21 59 15 20 4.6 31 303 40 -39 36 25 -39 7 34 -39 39 13 -39 4 45 0.13 -106 0 0 -39 46 48 15 20 9.4 30 302 41 -40 1 9 -39 32 27 -40 3 57 -39 29 39 0.14 -105 0 0 -40 10 55 15 20 14.1 29 302 41 -40 25 12 -39 56 38 -40 27 59 -39 53 51 0.14 -104 0 0 -40 34 20 15 20 18.6 28 301 42 -40 48 32 -40 20 7 -40 51 19 -40 17 21 0.14 -103 0 0 -40 57 4 15 20 22.9 28 300 43 -41 11 12 -40 42 55 -41 13 58 -40 40 10 0.14 -102 0 0 -41 19 7 15 20 27.1 27 300 44 -41 33 12 -41 5 3 -41 35 56 -41 2 18 0.14 -101 0 0 -41 40 30 15 20 31.1 26 299 44 -41 54 31 -41 26 30 -41 57 15 -41 23 46 0.14 -100 0 0 -42 1 14 15 20 34.9 25 298 45 -42 15 11 -41 47 18 -42 17 54 -41 44 35 0.14 - 99 0 0 -42 21 19 15 20 38.6 24 297 46 -42 35 12 -42 7 26 -42 37 54 -42 4 44 0.14 - 98 0 0 -42 40 45 15 20 42.1 23 297 46 -42 54 35 -42 26 57 -42 57 17 -42 24 15 0.14 - 97 0 0 -42 59 34 15 20 45.5 23 296 47 -43 13 20 -42 45 49 -43 16 1 -42 43 8 0.14 - 96 0 0 -43 17 45 15 20 48.7 22 295 48 -43 31 28 -43 4 4 -43 34 8 -43 1 23 0.14 - 95 0 0 -43 35 20 15 20 51.8 21 295 48 -43 48 59 -43 21 42 -43 51 38 -43 19 2 0.14 - 94 0 0 -43 52 18 15 20 54.8 20 294 49 -44 5 54 -43 38 43 -44 8 33 -43 36 4 0.14 - 93 0 0 -44 8 40 15 20 57.6 19 293 50 -44 22 13 -43 55 9 -44 24 51 -43 52 30 0.14 - 92 0 0 -44 24 28 15 21 0.3 19 293 50 -44 37 57 -44 10 59 -44 40 35 -44 8 21 0.14 - 91 0 0 -44 39 40 15 21 2.9 18 292 51 -44 53 6 -44 26 14 -44 55 43 -44 23 37 0.14 - 90 0 0 -44 54 18 15 21 5.3 17 291 51 -45 7 41 -44 40 55 -45 10 18 -44 38 18 0.14 - 89 0 0 -45 8 22 15 21 7.7 16 290 52 -45 21 42 -44 55 2 -45 24 18 -44 52 26 0.14 - 88 0 0 -45 21 52 15 21 9.9 16 290 53 -45 35 10 -45 8 35 -45 37 45 -45 6 0 0.14 - 87 0 0 -45 34 50 15 21 12.0 15 289 53 -45 48 5 -45 21 35 -45 50 40 -45 19 0 0.14 - 86 0 0 -45 47 14 15 21 13.9 14 288 54 -46 0 27 -45 34 2 -46 3 2 -45 31 28 0.14 - 85 0 0 -45 59 7 15 21 15.8 13 287 54 -46 12 17 -45 45 57 -46 14 51 -45 43 24 0.14 - 84 0 0 -46 10 28 15 21 17.6 13 287 55 -46 23 36 -45 57 21 -46 26 9 -45 54 47 0.14 - 83 0 0 -46 21 17 15 21 19.2 12 286 55 -46 34 23 -46 8 12 -46 36 56 -46 5 39 0.14 - 82 0 0 -46 31 36 15 21 20.7 11 285 56 -46 44 39 -46 18 33 -46 47 12 -46 16 0 0.14 - 81 0 0 -46 41 23 15 21 22.2 11 285 56 -46 54 24 -46 28 22 -46 56 57 -46 25 50 0.14 - 80 0 0 -46 50 40 15 21 23.5 10 284 57 -47 3 40 -46 37 41 -47 6 12 -46 35 9 0.14 - 79 0 0 -46 59 27 15 21 24.8 9 283 57 -47 12 25 -46 46 30 -47 14 56 -46 43 58 0.14 - 78 0 0 -47 7 44 15 21 25.9 8 282 58 -47 20 40 -46 54 49 -47 23 12 -46 52 18 0.14 - 77 0 0 -47 15 32 15 21 27.0 8 282 58 -47 28 26 -47 2 38 -47 30 57 -47 0 7 0.15 - 76 0 0 -47 22 50 15 21 27.9 7 281 59 -47 35 43 -47 9 58 -47 38 14 -47 7 27 0.15 - 75 0 0 -47 29 40 15 21 28.8 6 280 59 -47 42 31 -47 16 49 -47 45 2 -47 14 19 0.15 - 74 0 0 -47 36 1 15 21 29.5 6 279 59 -47 48 51 -47 23 11 -47 51 21 -47 20 41 0.15 - 73 0 0 -47 41 53 15 21 30.2 5 279 60 -47 54 42 -47 29 4 -47 57 11 -47 26 34 0.15 - 72 0 0 -47 47 17 15 21 30.8 4 278 60 -48 0 4 -47 34 29 -48 2 34 -47 32 0 0.15 - 71 0 0 -47 52 12 15 21 31.3 4 277 61 -48 4 59 -47 39 26 -48 7 29 -47 36 57 0.15 - 70 0 0 -47 56 40 15 21 31.7 3 276 61 -48 9 26 -47 43 55 -48 11 55 -47 41 26 0.15 - 69 0 0 -48 0 40 15 21 32.1 2 276 61 -48 13 25 -47 47 56 -48 15 54 -47 45 27 0.16 - 68 0 0 -48 4 13 15 21 32.3 2 275 62 -48 16 57 -47 51 29 -48 19 26 -47 49 0 0.16 - 67 0 0 -48 7 18 15 21 32.5 1 274 62 -48 20 1 -47 54 35 -48 22 30 -47 52 6 0.18 - 66 0 0 -48 9 55 15 21 32.5 0 273 62 -48 22 38 -47 57 13 -48 25 7 -47 54 44 0.28 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: HIP 54857 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 11 13 52.8559 DE: +02 16 05.501 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 11 13 52.8569 DE: +02 16 05.495 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 6.7 * B mag [mag]: 6.8 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (123) Brunhild asteroid class: approx. diameter [km]: 46 approx. diameter ["]: 0.029 distance from Earth [AU]: 2.17460 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.013", 0.002", 118.801° remarks: * orbital elements for (123)Brunhild : Mean anomaly = 61.4208864096 deg Arg. of pericenter = 124.7216022100 deg Long. of node = 307.6056346744 deg Inclination = 6.4132680026 deg Eccentricity = 0.1202980845 Semimajor axis = 2.6944312547 AU Perihelion dist = 2.3702963360 AU Mag: H = 8.92, G = 0.15 Epoch of elements : MJD 60666.63297641 TDT (2024 Dec 22.6330) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Feb11,4.44,2024,12,22,15.191432,-0.097819,-0.113348,4.566957,-3.752061,-0.005269,0.002293,0.000000,0.000000 -150.7459,2.1321,-48.15,-23.43,False HIP 54857,11.23134883,2.2681950,6.84,6.67,6.58,0.2,0,,11.25283361,2.1321384,7.05,6.69,0,0,0 123,Brunhild,13.72,46.499,2.1746,0,0,1.232,-15.17,,2.6,0 0,61.2798,2024,12,22,124.7216,307.6056,6.4133,0.12030,2.69443,2.37030,8.92,5.0,0.15 1.097,0.0130,0.0016,119,0.0029,Known errors,1.07,0,-1,-1 20241222__54857,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org