IOTA/IOTA-ES occultation update for (1) Ceres / UCAC4 461-051377 event on 2023 Jul 29, 22:48 UT Visible from South America Summary ------- On 2023 Jul 29 UT, the 952 km diameter asteroid (1) Ceres will occult a 11.9 mag star in the constellation Virgo for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.07 mag to 8.97 mag (the magnitude of the asteroid) for at most 30.910 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: 2023 Jul 29, 22:46 - 2023 Jul 29, 22:53 * geocentric midpoint of event [JD]: 2460155.45111675 * magnitude of target star: 11.89 * magnitude drop [mag]: 0.07 * estimated maximum duration [s]: 30.910 * Moon: 88 % sunlit, 76° distance * Sun: 65° distance * rough path description: South America Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 1055 * 1 sigma uncertainty interval [path widths]: +/- 0.00 * 1 sigma uncertainty interval [seconds]: +/- 0.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.000, +/- 0.000) * 1 sigma uncertainty ellipse (major, minor, PA): (0.000", 0.000", 23°) * approx speed of asteroid's shadow [km/s]: 30.7983 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 461-051377 by 1 Ceres on 2023 Jul 29 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 175 0 0 6 21 11 22 46 29.1 1 88 63 1 28 37 11 2 15 1 28 21 11 2 29 .... 176 0 0 6 22 39 22 46 29.2 2 88 64 1 30 9 11 3 40 1 29 53 11 3 54 0.32 177 0 0 6 23 31 22 46 29.3 3 88 64 1 31 2 11 4 30 1 30 46 11 4 44 0.38 178 0 0 6 23 45 22 46 29.5 4 88 65 1 31 16 11 4 44 1 31 0 11 4 59 0.41 179 0 0 6 23 23 22 46 29.8 5 88 66 1 30 51 11 4 24 1 30 35 11 4 39 0.43 -180 0 0 6 22 24 22 46 30.2 6 89 67 1 29 47 11 3 28 1 29 31 11 3 43 0.44 -179 0 0 6 20 47 22 46 30.6 7 89 68 1 28 4 11 1 58 1 27 48 11 2 12 0.44 -178 0 0 6 18 34 22 46 31.1 8 89 69 1 25 42 10 59 51 1 25 26 11 0 6 0.45 -177 0 0 6 15 43 22 46 31.6 9 89 69 1 22 42 10 57 10 1 22 26 10 57 25 0.45 -176 0 0 6 12 16 22 46 32.3 10 89 70 1 19 2 10 53 53 1 18 46 10 54 8 0.46 -175 0 0 6 8 11 22 46 33.0 11 89 71 1 14 43 10 50 1 1 14 27 10 50 16 0.46 -174 0 0 6 3 30 22 46 33.7 12 89 71 1 9 45 10 45 33 1 9 29 10 45 48 0.46 -173 0 0 5 58 10 22 46 34.6 13 89 72 1 4 8 10 40 30 1 3 52 10 40 45 0.46 -172 0 0 5 52 14 22 46 35.5 14 89 73 0 57 52 10 34 51 0 57 36 10 35 6 0.47 -171 0 0 5 45 40 22 46 36.4 15 89 73 0 50 56 10 28 37 0 50 40 10 28 52 0.47 -170 0 0 5 38 29 22 46 37.5 16 89 74 0 43 21 10 21 47 0 43 5 10 22 2 0.47 -169 0 0 5 30 41 22 46 38.6 17 90 74 0 35 6 10 14 21 0 34 50 10 14 36 0.47 -168 0 0 5 22 15 22 46 39.8 18 90 75 0 26 13 10 6 19 0 25 56 10 6 34 0.47 -167 0 0 5 13 11 22 46 41.0 19 90 75 0 16 39 9 57 42 0 16 23 9 57 57 0.47 -166 0 0 5 3 30 22 46 42.4 20 90 75 0 6 26 9 48 29 0 6 10 9 48 44 0.47 -165 0 0 4 53 11 22 46 43.8 21 90 75 - 0 4 26 9 38 39 - 0 4 43 9 38 54 0.47 -164 0 0 4 42 14 22 46 45.2 22 90 76 - 0 15 59 9 28 14 - 0 16 15 9 28 29 0.47 -163 0 0 4 30 40 22 46 46.8 23 90 76 - 0 28 11 9 17 12 - 0 28 27 9 17 27 0.47 -162 0 0 4 18 27 22 46 48.4 24 90 76 - 0 41 2 9 5 35 - 0 41 19 9 5 50 0.47 -161 0 0 4 5 37 22 46 50.0 25 90 75 - 0 54 34 8 53 21 - 0 54 50 8 53 36 0.48 -160 0 0 3 52 9 22 46 51.8 26 90 75 - 1 8 45 8 40 31 - 1 9 1 8 40 46 0.48 -159 0 0 3 38 3 22 46 53.6 27 90 75 - 1 23 36 8 27 4 - 1 23 52 8 27 19 0.48 -158 0 0 3 23 19 22 46 55.5 28 89 75 - 1 39 7 8 13 1 - 1 39 23 8 13 16 0.48 -157 0 0 3 7 57 22 46 57.4 29 89 74 - 1 55 17 7 58 22 - 1 55 34 7 58 37 0.48 -156 0 0 2 51 57 22 46 59.5 30 89 74 - 2 12 8 7 43 6 - 2 12 24 7 43 22 0.48 -155 0 0 2 35 19 22 47 1.6 31 89 73 - 2 29 38 7 27 14 - 2 29 55 7 27 29 0.48 -154 0 0 2 18 3 22 47 3.7 32 89 73 - 2 47 48 7 10 45 - 2 48 5 7 11 1 0.48 -153 0 0 2 0 9 22 47 6.0 33 89 72 - 3 6 38 6 53 40 - 3 6 55 6 53 56 0.48 -152 0 0 1 41 37 22 47 8.3 34 89 71 - 3 26 7 6 35 58 - 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4 31 22 -15 33 46 - 4 31 5 0.48 -125 0 0 -10 27 47 22 48 34.8 58 68 45 -16 8 59 - 5 4 23 -16 9 18 - 5 4 6 0.48 -124 0 0 -11 2 25 22 48 38.7 59 67 43 -16 44 58 - 5 37 53 -16 45 17 - 5 37 36 0.48 -123 0 0 -11 37 30 22 48 42.7 60 65 42 -17 21 22 - 6 11 49 -17 21 41 - 6 11 32 0.48 -122 0 0 -12 13 0 22 48 46.7 60 63 41 -17 58 11 - 6 46 11 -17 58 30 - 6 45 54 0.48 -121 0 0 -12 48 54 22 48 50.8 61 61 40 -18 35 23 - 7 20 59 -18 35 42 - 7 20 42 0.48 -120 0 0 -13 25 12 22 48 54.9 62 59 39 -19 12 58 - 7 56 11 -19 13 17 - 7 55 54 0.48 -119 0 0 -14 1 52 22 48 59.0 62 57 38 -19 50 53 - 8 31 46 -19 51 12 - 8 31 29 0.48 -118 0 0 -14 38 53 22 49 3.1 63 54 36 -20 29 8 - 9 7 44 -20 29 27 - 9 7 27 0.48 -117 0 0 -15 16 14 22 49 7.2 63 52 35 -21 7 41 - 9 44 3 -21 8 1 - 9 43 45 0.48 -116 0 0 -15 53 53 22 49 11.4 63 50 34 -21 46 32 -10 20 42 -21 46 51 -10 20 24 0.48 -115 0 0 -16 31 50 22 49 15.6 64 47 33 -22 25 37 -10 57 40 -22 25 57 -10 57 22 0.48 -114 0 0 -17 10 3 22 49 19.7 64 45 32 -23 4 57 -11 34 56 -23 5 17 -11 34 38 0.48 -113 0 0 -17 48 30 22 49 23.9 64 42 31 -23 44 29 -12 12 28 -23 44 49 -12 12 11 0.48 -112 0 0 -18 27 11 22 49 28.1 64 39 30 -24 24 13 -12 50 16 -24 24 32 -12 49 58 0.48 -111 0 0 -19 6 4 22 49 32.3 64 36 28 -25 4 5 -13 28 18 -25 4 25 -13 28 0 0.48 -110 0 0 -19 45 7 22 49 36.5 64 34 27 -25 44 6 -14 6 32 -25 44 26 -14 6 15 0.48 -109 0 0 -20 24 20 22 49 40.7 64 31 26 -26 24 12 -14 44 59 -26 24 32 -14 44 41 0.48 -108 0 0 -21 3 40 22 49 44.8 64 28 25 -27 4 24 -15 23 35 -27 4 44 -15 23 17 0.48 -107 0 0 -21 43 6 22 49 49.0 64 25 24 -27 44 38 -16 2 19 -27 44 58 -16 2 2 0.48 -106 0 0 -22 22 36 22 49 53.1 64 23 23 -28 24 54 -16 41 11 -28 25 14 -16 40 53 0.48 -105 0 0 -23 2 10 22 49 57.2 64 20 21 -29 5 10 -17 20 9 -29 5 30 -17 19 51 0.48 -104 0 0 -23 41 45 22 50 1.3 63 17 20 -29 45 23 -17 59 11 -29 45 43 -17 58 53 0.48 -103 0 0 -24 21 20 22 50 5.4 63 15 19 -30 25 33 -18 38 16 -30 25 54 -18 37 58 0.48 -102 0 0 -25 0 53 22 50 9.4 62 12 18 -31 5 38 -19 17 23 -31 5 59 -19 17 5 0.48 -101 0 0 -25 40 23 22 50 13.4 62 10 17 -31 45 36 -19 56 30 -31 45 57 -19 56 12 0.48 -100 0 0 -26 19 49 22 50 17.4 62 8 16 -32 25 26 -20 35 35 -32 25 47 -20 35 17 0.48 - 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73 0 0 -42 17 22 22 51 44.0 41 328 -11 -48 10 28 -36 43 40 -48 10 47 -36 43 22 0.48 - 72 0 0 -42 46 45 22 51 46.3 40 327 -12 -48 38 41 -37 14 1 -48 39 1 -37 13 44 0.48 - 71 0 0 -43 15 36 22 51 48.6 39 326 -13 -49 6 21 -37 43 53 -49 6 41 -37 43 36 0.48 - 70 0 0 -43 43 56 22 51 50.8 38 325 -14 -49 33 28 -38 13 14 -49 33 48 -38 12 57 0.48 - 69 0 0 -44 11 44 22 51 52.9 38 324 -14 -50 0 2 -38 42 5 -50 0 21 -38 41 48 0.48 - 68 0 0 -44 39 0 22 51 55.0 37 323 -15 -50 26 2 -39 10 26 -50 26 22 -39 10 9 0.48 - 67 0 0 -45 5 44 22 51 57.0 36 322 -16 -50 51 30 -39 38 15 -50 51 49 -39 37 58 0.48 - 66 0 0 -45 31 56 22 51 58.9 35 321 -17 -51 16 24 -40 5 34 -51 16 44 -40 5 17 0.48 - 65 0 0 -45 57 36 22 52 0.8 35 320 -18 -51 40 46 -40 32 21 -51 41 5 -40 32 4 0.48 - 64 0 0 -46 22 44 22 52 2.6 34 319 -18 -52 4 35 -40 58 37 -52 4 54 -40 58 20 0.48 - 63 0 0 -46 47 21 22 52 4.4 33 318 -19 -52 27 52 -41 24 22 -52 28 11 -41 24 5 0.48 - 62 0 0 -47 11 26 22 52 6.1 32 318 -20 -52 50 36 -41 49 36 -52 50 55 -41 49 19 0.48 - 61 0 0 -47 34 59 22 52 7.8 31 317 -21 -53 12 49 -42 14 19 -53 13 8 -42 14 2 0.48 - 60 0 0 -47 58 0 22 52 9.4 31 316 -21 -53 34 30 -42 38 30 -53 34 48 -42 38 13 0.48 - 59 0 0 -48 20 31 22 52 10.9 30 315 -22 -53 55 39 -43 2 10 -53 55 58 -43 1 53 0.48 - 58 0 0 -48 42 30 22 52 12.5 29 314 -23 -54 16 17 -43 25 19 -54 16 36 -43 25 2 0.48 - 57 0 0 -49 3 59 22 52 13.9 29 313 -23 -54 36 25 -43 47 57 -54 36 43 -43 47 41 0.48 - 56 0 0 -49 24 56 22 52 15.3 28 312 -24 -54 56 2 -44 10 5 -54 56 20 -44 9 48 0.48 - 55 0 0 -49 45 24 22 52 16.7 27 311 -25 -55 15 9 -44 31 41 -55 15 27 -44 31 25 0.48 - 54 0 0 -50 5 21 22 52 18.0 26 311 -25 -55 33 46 -44 52 48 -55 34 5 -44 52 31 0.48 - 53 0 0 -50 24 48 22 52 19.3 26 310 -26 -55 51 54 -45 13 24 -55 52 12 -45 13 7 0.48 - 52 0 0 -50 43 46 22 52 20.5 25 309 -27 -56 9 33 -45 33 29 -56 9 51 -45 33 13 0.48 - 51 0 0 -51 2 14 22 52 21.7 24 308 -27 -56 26 43 -45 53 5 -56 27 1 -45 52 49 0.48 - 50 0 0 -51 20 13 22 52 22.8 24 307 -28 -56 43 25 -46 12 12 -56 43 43 -46 11 55 0.48 - 49 0 0 -51 37 43 22 52 23.9 23 306 -28 -56 59 39 -46 30 48 -56 59 57 -46 30 32 0.48 - 48 0 0 -51 54 45 22 52 24.9 22 306 -29 -57 15 26 -46 48 56 -57 15 44 -46 48 40 0.48 - 47 0 0 -52 11 19 22 52 25.9 22 305 -29 -57 30 45 -47 6 35 -57 31 3 -47 6 19 0.48 - 46 0 0 -52 27 25 22 52 26.9 21 304 -30 -57 45 38 -47 23 44 -57 45 55 -47 23 28 0.48 - 45 0 0 -52 43 3 22 52 27.9 20 303 -31 -58 0 4 -47 40 26 -58 0 21 -47 40 10 0.48 - 44 0 0 -52 58 14 22 52 28.8 20 302 -31 -58 14 4 -47 56 39 -58 14 21 -47 56 23 0.48 - 43 0 0 -53 12 58 22 52 29.6 19 301 -32 -58 27 38 -48 12 24 -58 27 56 -48 12 8 0.48 - 42 0 0 -53 27 16 22 52 30.4 18 300 -32 -58 40 47 -48 27 41 -58 41 5 -48 27 26 0.48 - 41 0 0 -53 41 7 22 52 31.2 18 300 -33 -58 53 31 -48 42 31 -58 53 49 -48 42 16 0.48 - 40 0 0 -53 54 32 22 52 32.0 17 299 -33 -59 5 51 -48 56 54 -59 6 8 -48 56 38 0.48 - 39 0 0 -54 7 31 22 52 32.7 16 298 -34 -59 17 46 -49 10 50 -59 18 3 -49 10 34 0.48 - 38 0 0 -54 20 5 22 52 33.4 16 297 -34 -59 29 17 -49 24 19 -59 29 34 -49 24 3 0.48 - 37 0 0 -54 32 14 22 52 34.1 15 296 -35 -59 40 25 -49 37 21 -59 40 42 -49 37 6 0.48 - 36 0 0 -54 43 58 22 52 34.7 15 295 -35 -59 51 9 -49 49 58 -59 51 26 -49 49 42 0.48 - 35 0 0 -54 55 18 22 52 35.3 14 295 -36 -60 1 30 -50 2 8 -60 1 47 -50 1 53 0.48 - 34 0 0 -55 6 13 22 52 35.9 13 294 -36 -60 11 29 -50 13 53 -60 11 46 -50 13 38 0.48 - 33 0 0 -55 16 44 22 52 36.4 13 293 -37 -60 21 5 -50 25 13 -60 21 22 -50 24 57 0.48 - 32 0 0 -55 26 51 22 52 37.0 12 292 -37 -60 30 19 -50 36 7 -60 30 36 -50 35 52 0.48 - 31 0 0 -55 36 35 22 52 37.4 12 291 -38 -60 39 12 -50 46 36 -60 39 28 -50 46 21 0.48 - 30 0 0 -55 45 56 22 52 37.9 11 290 -38 -60 47 43 -50 56 40 -60 47 59 -50 56 25 0.48 - 29 0 0 -55 54 53 22 52 38.3 10 290 -39 -60 55 52 -51 6 20 -60 56 9 -51 6 5 0.48 - 28 0 0 -56 3 28 22 52 38.8 10 289 -39 -61 3 41 -51 15 36 -61 3 57 -51 15 21 0.48 - 27 0 0 -56 11 40 22 52 39.1 9 288 -39 -61 11 9 -51 24 28 -61 11 25 -51 24 12 0.48 - 26 0 0 -56 19 30 22 52 39.5 9 287 -40 -61 18 16 -51 32 55 -61 18 32 -51 32 40 0.48 - 25 0 0 -56 26 58 22 52 39.8 8 286 -40 -61 25 3 -51 40 59 -61 25 19 -51 40 44 0.49 - 24 0 0 -56 34 4 22 52 40.1 8 285 -41 -61 31 30 -51 48 39 -61 31 46 -51 48 24 0.49 - 23 0 0 -56 40 48 22 52 40.4 7 285 -41 -61 37 37 -51 55 57 -61 37 53 -51 55 42 0.49 - 22 0 0 -56 47 11 22 52 40.7 7 284 -41 -61 43 24 -52 2 50 -61 43 40 -52 2 35 0.49 - 21 0 0 -56 53 12 22 52 40.9 6 283 -42 -61 48 52 -52 9 21 -61 49 8 -52 9 6 0.49 - 20 0 0 -56 58 52 22 52 41.2 5 282 -42 -61 54 1 -52 15 29 -61 54 17 -52 15 14 0.49 - 19 0 0 -57 4 11 22 52 41.4 5 281 -43 -61 58 50 -52 21 15 -61 59 6 -52 21 0 0.49 - 18 0 0 -57 9 10 22 52 41.5 4 280 -43 -62 3 20 -52 26 38 -62 3 36 -52 26 23 0.50 - 17 0 0 -57 13 47 22 52 41.7 4 280 -43 -62 7 32 -52 31 38 -62 7 48 -52 31 23 0.50 - 16 0 0 -57 18 4 22 52 41.8 3 279 -44 -62 11 25 -52 36 16 -62 11 41 -52 36 1 0.51 - 15 0 0 -57 22 0 22 52 41.9 3 278 -44 -62 14 59 -52 40 32 -62 15 15 -52 40 17 0.51 - 14 0 0 -57 25 36 22 52 42.0 2 277 -44 -62 18 15 -52 44 26 -62 18 31 -52 44 11 0.52 - 13 0 0 -57 28 52 22 52 42.1 2 276 -45 -62 21 12 -52 47 58 -62 21 28 -52 47 43 0.54 - 12 0 0 -57 31 48 22 52 42.1 1 275 -45 -62 23 51 -52 51 8 -62 24 7 -52 50 53 0.58 - 11 0 0 -57 34 23 22 52 42.2 0 275 -45 -62 26 12 -52 53 56 -62 26 28 -52 53 41 0.70 Uncertainty in time = +/- 0 secs Prediction of 2022 Jun 15.2 Data for the target star ------------------------ * name: UCAC4 461-051377 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 12 53 07.7802 DE: +02 09 19.512 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 12 53 07.7801 DE: +02 09 19.512 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1) Ceres asteroid class: approx. diameter [km]: 952 approx. diameter ["]: 0.453 distance from Earth [AU]: 2.89600 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 date of fit: 2021 Apr 13 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): 0.000", 0.000", 23.1° remarks: * orbital elements for (1)Ceres : Mean anomaly = 50.4113711863 deg Arg. of pericenter = 73.4462595662 deg Long. of node = 80.2561241625 deg Inclination = 10.5866568810 deg Eccentricity = 0.0788968947 Semimajor axis = 2.7673130116 AU Perihelion dist = 2.5489806084 AU Mag: H = 3.33, G = 0.12 Epoch of elements : MJD 60154.95034722 TDT (2023 Jul 29.9503) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482021Apr13,30.91,2023,7,29,22.826802,-0.225374,-0.367989,14.764431,-9.175804,0.004688,-0.001663,-0.000001,0.000000 -96.1496,2.0296,-160.77,18.63,False UCAC4 461-051377,12.88549450,2.1554199,0.00,11.89,0.00,0.0,0,,12.90531045,2.0295571,0.07,0.00,0,0,0 1,Ceres,8.97,952.0,2.8960,0,0,2.991,-27.87,,0.0 0,50.2079,2023,7,29,73.4463,80.2561,10.5867,0.07890,2.76731,2.54898,3.54,5.0,0.15 1.000,0.0002,0.0002,23,0.0002,Known errors,-1.00,-1,-1,-1 20230729_051377,59745.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jun 15, 04:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org