IOTA/IOTA-ES occultation update for (2012) Guo / TYC 6318-00745-1 event on 2024 Oct 28, 11:45 UT Visible from Summary ------- On 2024 Oct 28 UT, the 11.9862000069926 km diameter asteroid (2012) Guo will occult a 9.8 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.77 mag to 17.53 mag (the magnitude of the asteroid) for at most 0.500 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 28, 11:42 - 2024 Oct 28, 11:48 * geocentric midpoint of event [JD]: 2460611.98968429 * magnitude of target star: 9.76 * magnitude drop [mag]: 7.77 * estimated maximum duration [s]: 0.500 * Moon: 14 % sunlit, 128° distance * Sun: 84° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.003", 75°) * approx speed of asteroid's shadow [km/s]: 24.1512 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6318-00745-1 by 2012 Guo on 2024 Oct 28 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 - 29 0 0 -55 14 31 11 42 11.4 0 122 42 -55 20 18 -55 8 45 -55 24 14 -55 4 51 .... - 28 0 0 -55 36 4 11 42 11.5 1 121 42 -55 41 51 -55 30 18 -55 45 46 -55 26 25 0.93 - 27 0 0 -55 57 22 11 42 11.6 2 120 42 -56 3 8 -55 51 36 -56 7 3 -55 47 43 1.01 - 26 0 0 -56 18 23 11 42 11.7 2 119 43 -56 24 9 -56 12 38 -56 28 4 -56 8 45 1.04 - 25 0 0 -56 39 8 11 42 11.9 3 119 43 -56 44 54 -56 33 23 -56 48 48 -56 29 30 1.06 - 24 0 0 -56 59 36 11 42 12.2 3 118 43 -57 5 21 -56 53 51 -57 9 15 -56 49 59 1.07 - 23 0 0 -57 19 47 11 42 12.5 4 117 43 -57 25 31 -57 14 3 -57 29 25 -57 10 10 1.07 - 22 0 0 -57 39 40 11 42 12.8 5 116 43 -57 45 24 -57 33 57 -57 49 17 -57 30 5 1.08 - 21 0 0 -57 59 16 11 42 13.2 5 115 43 -58 4 59 -57 53 33 -58 8 52 -57 49 42 1.08 - 20 0 0 -58 18 34 11 42 13.6 6 114 43 -58 24 17 -58 12 52 -58 28 9 -58 9 1 1.09 - 19 0 0 -58 37 34 11 42 14.1 7 114 43 -58 43 16 -58 31 53 -58 47 8 -58 28 2 1.09 - 18 0 0 -58 56 16 11 42 14.6 7 113 42 -59 1 58 -58 50 35 -59 5 49 -58 46 45 1.09 - 17 0 0 -59 14 40 11 42 15.2 8 112 42 -59 20 21 -59 8 59 -59 24 11 -59 5 10 1.09 - 16 0 0 -59 32 45 11 42 15.7 8 111 42 -59 38 25 -59 27 5 -59 42 15 -59 23 16 1.09 - 15 0 0 -59 50 31 11 42 16.4 9 110 42 -59 56 11 -59 44 53 -60 0 1 -59 41 4 1.09 - 14 0 0 -60 7 59 11 42 17.0 10 109 42 -60 13 38 -60 2 22 -60 17 27 -59 58 34 1.10 - 13 0 0 -60 25 9 11 42 17.7 10 108 42 -60 30 46 -60 19 32 -60 34 35 -60 15 44 1.10 - 12 0 0 -60 41 59 11 42 18.4 11 107 42 -60 47 36 -60 36 23 -60 51 24 -60 32 36 1.10 - 11 0 0 -60 58 31 11 42 19.1 11 106 42 -61 4 7 -60 52 56 -61 7 54 -60 49 9 1.10 - 10 0 0 -61 14 44 11 42 19.9 12 106 42 -61 20 19 -61 9 9 -61 24 6 -61 5 24 1.10 - 9 0 0 -61 30 38 11 42 20.7 12 105 41 -61 36 12 -61 25 4 -61 39 58 -61 21 19 1.10 - 8 0 0 -61 46 13 11 42 21.5 13 104 41 -61 51 46 -61 40 40 -61 55 32 -61 36 56 1.10 - 7 0 0 -62 1 29 11 42 22.4 13 103 41 -62 7 2 -61 55 58 -62 10 47 -61 52 14 1.10 - 6 0 0 -62 16 27 11 42 23.2 14 102 41 -62 21 58 -62 10 56 -62 25 43 -62 7 13 1.10 - 5 0 0 -62 31 6 11 42 24.1 14 101 41 -62 36 36 -62 25 36 -62 40 20 -62 21 54 1.10 - 4 0 0 -62 45 27 11 42 25.0 15 100 41 -62 50 56 -62 39 58 -62 54 39 -62 36 16 1.10 - 3 0 0 -62 59 29 11 42 25.9 15 99 40 -63 4 57 -62 54 1 -63 8 39 -62 50 20 1.10 - 2 0 0 -63 13 12 11 42 26.9 16 98 40 -63 18 39 -63 7 45 -63 22 21 -63 4 5 1.10 - 1 0 0 -63 26 37 11 42 27.8 16 97 40 -63 32 4 -63 21 11 -63 35 45 -63 17 32 1.10 0 0 0 -63 39 44 11 42 28.8 17 96 40 -63 45 10 -63 34 19 -63 48 50 -63 30 40 1.10 1 0 0 -63 52 33 11 42 29.8 17 95 40 -63 57 58 -63 47 9 -64 1 37 -63 43 31 1.10 2 0 0 -64 5 4 11 42 30.8 18 94 39 -64 10 27 -63 59 41 -64 14 6 -63 56 3 1.10 3 0 0 -64 17 17 11 42 31.9 18 93 39 -64 22 39 -64 11 55 -64 26 18 -64 8 18 1.10 4 0 0 -64 29 13 11 42 32.9 19 93 39 -64 34 34 -64 23 52 -64 38 11 -64 20 15 1.10 5 0 0 -64 40 50 11 42 34.0 19 92 39 -64 46 11 -64 35 31 -64 49 48 -64 31 55 1.10 6 0 0 -64 52 11 11 42 35.0 19 91 38 -64 57 30 -64 46 52 -65 1 6 -64 43 17 1.10 7 0 0 -65 3 14 11 42 36.1 20 90 38 -65 8 32 -64 57 56 -65 12 8 -64 54 22 1.10 8 0 0 -65 14 0 11 42 37.2 20 89 38 -65 19 18 -65 8 43 -65 22 52 -65 5 10 1.10 9 0 0 -65 24 29 11 42 38.3 21 88 38 -65 29 46 -65 19 14 -65 33 20 -65 15 40 1.10 10 0 0 -65 34 42 11 42 39.4 21 87 37 -65 39 57 -65 29 27 -65 43 31 -65 25 54 1.10 11 0 0 -65 44 37 11 42 40.5 22 86 37 -65 49 52 -65 39 24 -65 53 25 -65 35 52 1.10 12 0 0 -65 54 17 11 42 41.6 22 85 37 -65 59 30 -65 49 4 -66 3 3 -65 45 33 1.10 13 0 0 -66 3 40 11 42 42.8 22 84 37 -66 8 52 -65 58 28 -66 12 24 -65 54 57 1.10 14 0 0 -66 12 47 11 42 43.9 23 83 36 -66 17 58 -66 7 35 -66 21 29 -66 4 5 1.10 15 0 0 -66 21 38 11 42 45.1 23 82 36 -66 26 48 -66 16 27 -66 30 19 -66 12 58 1.10 16 0 0 -66 30 13 11 42 46.3 23 81 36 -66 35 23 -66 25 3 -66 38 52 -66 21 34 1.10 17 0 0 -66 38 32 11 42 47.4 24 80 36 -66 43 41 -66 33 24 -66 47 10 -66 29 55 1.10 18 0 0 -66 46 36 11 42 48.6 24 79 35 -66 51 44 -66 41 28 -66 55 13 -66 38 1 1.10 19 0 0 -66 54 25 11 42 49.8 25 78 35 -66 59 32 -66 49 18 -67 3 0 -66 45 51 1.10 20 0 0 -67 1 58 11 42 51.0 25 77 35 -67 7 4 -66 56 52 -67 10 32 -66 53 25 1.10 21 0 0 -67 9 16 11 42 52.2 25 76 35 -67 14 22 -67 4 11 -67 17 49 -67 0 45 1.10 22 0 0 -67 16 20 11 42 53.4 26 75 34 -67 21 25 -67 11 15 -67 24 51 -67 7 50 1.10 23 0 0 -67 23 9 11 42 54.6 26 74 34 -67 28 13 -67 18 5 -67 31 38 -67 14 40 1.10 24 0 0 -67 29 43 11 42 55.8 26 73 34 -67 34 46 -67 24 40 -67 38 11 -67 21 15 1.10 25 0 0 -67 36 2 11 42 57.0 27 71 33 -67 41 5 -67 31 0 -67 44 30 -67 27 36 1.10 26 0 0 -67 42 8 11 42 58.3 27 70 33 -67 47 10 -67 37 6 -67 50 34 -67 33 43 1.10 27 0 0 -67 47 59 11 42 59.5 27 69 33 -67 53 0 -67 42 58 -67 56 24 -67 39 35 1.10 28 0 0 -67 53 36 11 43 0.8 28 68 33 -67 58 37 -67 48 36 -68 2 0 -67 45 14 1.10 29 0 0 -67 58 59 11 43 2.0 28 67 32 -68 3 59 -67 54 0 -68 7 22 -67 50 38 1.10 30 0 0 -68 4 9 11 43 3.3 28 66 32 -68 9 8 -67 59 10 -68 12 31 -67 55 48 1.10 31 0 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11 45 35.7 42 319 -1 -61 10 12 -60 59 2 -61 13 59 -60 55 17 1.11 119 0 0 -60 48 5 11 45 38.3 41 318 -2 -60 53 41 -60 42 29 -60 57 29 -60 38 43 1.11 120 0 0 -60 31 14 11 45 40.9 41 316 -2 -60 36 51 -60 25 37 -60 40 39 -60 21 50 1.11 121 0 0 -60 14 3 11 45 43.5 41 315 -3 -60 19 41 -60 8 25 -60 23 30 -60 4 38 1.11 122 0 0 -59 56 33 11 45 46.1 41 314 -4 -60 2 12 -59 50 55 -60 6 1 -59 47 6 1.11 123 0 0 -59 38 43 11 45 48.8 41 312 -4 -59 44 23 -59 33 5 -59 48 13 -59 29 16 1.11 124 0 0 -59 20 35 11 45 51.5 41 311 -5 -59 26 16 -59 14 55 -59 30 6 -59 11 6 1.11 125 0 0 -59 2 8 11 45 54.2 40 310 -5 -59 7 49 -58 56 27 -59 11 40 -58 52 37 1.11 126 0 0 -58 43 21 11 45 56.9 40 308 -6 -58 49 3 -58 37 40 -58 52 55 -58 33 50 1.11 127 0 0 -58 24 16 11 45 59.6 40 307 -7 -58 29 59 -58 18 34 -58 33 51 -58 14 43 1.11 128 0 0 -58 4 52 11 46 2.4 40 305 -7 -58 10 35 -57 59 9 -58 14 28 -57 55 18 1.11 129 0 0 -57 45 9 11 46 5.1 40 304 -8 -57 50 53 -57 39 26 -57 54 46 -57 35 34 1.11 130 0 0 -57 25 8 11 46 7.9 39 303 -8 -57 30 53 -57 19 25 -57 34 47 -57 15 33 1.11 131 0 0 -57 4 50 11 46 10.7 39 302 -9 -57 10 35 -56 59 5 -57 14 29 -56 55 13 1.11 132 0 0 -56 44 13 11 46 13.5 39 300 -10 -56 49 59 -56 38 28 -56 53 53 -56 34 35 1.11 133 0 0 -56 23 19 11 46 16.3 38 299 -10 -56 29 5 -56 17 33 -56 32 59 -56 13 40 1.11 134 0 0 -56 2 7 11 46 19.2 38 298 -11 -56 7 54 -55 56 21 -56 11 49 -55 52 28 1.11 135 0 0 -55 40 39 11 46 22.0 38 296 -12 -55 46 26 -55 34 52 -55 50 21 -55 30 59 1.11 136 0 0 -55 18 54 11 46 24.9 37 295 -12 -55 24 41 -55 13 7 -55 28 37 -55 9 13 1.11 137 0 0 -54 56 53 11 46 27.7 37 294 -13 -55 2 40 -54 51 5 -55 6 36 -54 47 11 1.11 138 0 0 -54 34 36 11 46 30.6 37 293 -14 -54 40 24 -54 28 48 -54 44 20 -54 24 54 1.11 139 0 0 -54 12 4 11 46 33.4 36 291 -14 -54 17 52 -54 6 16 -54 21 48 -54 2 21 1.11 140 0 0 -53 49 16 11 46 36.3 36 290 -15 -53 55 5 -53 43 29 -53 59 1 -53 39 34 1.11 141 0 0 -53 26 15 11 46 39.1 35 289 -16 -53 32 4 -53 20 27 -53 36 0 -53 16 32 1.12 142 0 0 -53 3 0 11 46 41.9 35 288 -16 -53 8 49 -52 57 12 -53 12 45 -52 53 17 1.12 143 0 0 -52 39 32 11 46 44.8 34 286 -17 -52 45 21 -52 33 43 -52 49 17 -52 29 48 1.12 144 0 0 -52 15 51 11 46 47.6 34 285 -18 -52 21 40 -52 10 2 -52 25 36 -52 6 7 1.12 145 0 0 -51 51 57 11 46 50.4 33 284 -18 -51 57 46 -51 46 9 -52 1 43 -51 42 14 1.12 146 0 0 -51 27 53 11 46 53.2 33 283 -19 -51 33 42 -51 22 5 -51 37 38 -51 18 10 1.12 147 0 0 -51 3 37 11 46 56.0 32 282 -20 -51 9 26 -50 57 49 -51 13 22 -50 53 55 1.12 148 0 0 -50 39 12 11 46 58.8 32 281 -21 -50 45 0 -50 33 24 -50 48 56 -50 29 29 1.12 149 0 0 -50 14 37 11 47 1.5 31 280 -21 -50 20 25 -50 8 49 -50 24 21 -50 4 54 1.12 150 0 0 -49 49 53 11 47 4.3 31 279 -22 -49 55 41 -49 44 5 -49 59 37 -49 40 11 1.12 151 0 0 -49 25 1 11 47 7.0 30 278 -23 -49 30 49 -49 19 14 -49 34 44 -49 15 20 1.12 152 0 0 -49 0 2 11 47 9.6 29 276 -23 -49 5 49 -48 54 15 -49 9 45 -48 50 21 1.12 153 0 0 -48 34 56 11 47 12.3 29 275 -24 -48 40 44 -48 29 10 -48 44 39 -48 25 16 1.12 154 0 0 -48 9 45 11 47 14.9 28 274 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-43 10 41 -42 59 24 -43 14 30 -42 55 36 1.14 167 0 0 -42 39 52 11 47 44.5 19 263 -33 -42 45 30 -42 34 14 -42 49 19 -42 30 27 1.14 168 0 0 -42 14 47 11 47 46.3 18 262 -34 -42 20 24 -42 9 11 -42 24 13 -42 5 24 1.14 169 0 0 -41 49 50 11 47 48.1 17 261 -34 -41 55 26 -41 44 14 -41 59 14 -41 40 28 1.14 170 0 0 -41 25 0 11 47 49.8 16 261 -35 -41 30 35 -41 19 25 -41 34 22 -41 15 39 1.15 171 0 0 -41 0 19 11 47 51.5 16 260 -35 -41 5 53 -40 54 45 -41 9 39 -40 50 59 1.15 172 0 0 -40 35 46 11 47 53.0 15 259 -36 -40 41 20 -40 30 14 -40 45 6 -40 26 29 1.15 173 0 0 -40 11 24 11 47 54.5 14 258 -36 -40 16 57 -40 5 52 -40 20 42 -40 2 9 1.15 174 0 0 -39 47 13 11 47 55.9 13 258 -37 -39 52 45 -39 41 42 -39 56 29 -39 37 59 1.16 175 0 0 -39 23 14 11 47 57.3 12 257 -37 -39 28 44 -39 17 44 -39 32 28 -39 14 1 1.16 176 0 0 -38 59 26 11 47 58.5 11 256 -38 -39 4 56 -38 53 57 -39 8 39 -38 50 15 1.17 177 0 0 -38 35 52 11 47 59.7 11 256 -38 -38 41 21 -38 30 24 -38 45 3 -38 26 43 1.17 178 0 0 -38 12 32 11 48 0.7 10 255 -39 -38 18 0 -38 7 5 -38 21 41 -38 3 24 1.18 179 0 0 -37 49 26 11 48 1.7 9 254 -39 -37 54 53 -37 44 0 -37 58 34 -37 40 20 1.18 180 0 0 -37 26 36 11 48 2.6 8 254 -39 -37 32 1 -37 21 11 -37 35 42 -37 17 31 1.19 -179 0 0 -37 4 1 11 48 3.4 7 253 -40 -37 9 26 -36 58 37 -37 13 5 -36 54 58 1.20 -178 0 0 -36 41 43 11 48 4.1 6 252 -40 -36 47 6 -36 36 20 -36 50 46 -36 32 42 1.22 -177 0 0 -36 19 42 11 48 4.8 5 252 -40 -36 25 5 -36 14 20 -36 28 43 -36 10 42 1.23 -176 0 0 -35 57 59 11 48 5.3 4 251 -41 -36 3 20 -35 52 38 -36 6 58 -35 49 1 1.26 -175 0 0 -35 36 34 11 48 5.7 4 251 -41 -35 41 55 -35 31 14 -35 45 32 -35 27 38 1.30 -174 0 0 -35 15 28 11 48 6.1 3 250 -41 -35 20 48 -35 10 9 -35 24 24 -35 6 34 1.36 -173 0 0 -34 54 42 11 48 6.3 2 249 -41 -35 0 1 -34 49 24 -35 3 37 -34 45 49 1.48 -172 0 0 -34 34 16 11 48 6.5 1 249 -41 -34 39 34 -34 28 59 -34 43 9 -34 25 25 1.83 -171 0 0 -34 14 10 11 48 6.5 0 248 -42 -34 19 27 -34 8 54 -34 23 2 .. .. .. 13.60 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6318-00745-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 02 00.0280 DE: -17 54 00.912 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 02 00.0278 DE: -17 54 00.913 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.8 * B mag [mag]: 10.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2012) Guo asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.009 distance from Earth [AU]: 1.76210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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", 0.003", 74.977° remarks: * orbital elements for (2012)Guo : Mean anomaly = 11.1456779016 deg Arg. of pericenter = 36.6053506884 deg Long. of node = 277.0549306161 deg Inclination = 2.9056434657 deg Eccentricity = 0.1779935849 Semimajor axis = 2.3287394290 AU Perihelion dist = 1.9142387498 AU Mag: H = 13.55, G = 0.15 Epoch of elements : MJD 60611.48968396 TDT (2024 Oct 28.4897) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.50,2024,10,28,11.752423,0.148492,-0.722901,13.352566,2.744067,0.005143,0.001097,0.000000,0.000000 87.2545,-17.8320,-0.35,-13.37,False TYC 6318-00745-1,20.03334113,-17.9002533,10.33,9.76,9.45,0.1,0,,20.05702365,-17.8320298,7.77,7.63,0,0,0 2012,Guo,17.53,12.114,1.7621,0,0,4.667,13.70,,0.8,0 0,11.0099,2024,10,28,36.6054,277.0549,2.9056,0.17799,2.32874,1.91424,13.55,5.0,0.15 1.338,0.0197,0.0030,75,0.0032,Known errors,0.99,0,-1,-1 20241028_0745-1,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org