IOTA/IOTA-ES occultation update for (498) Tokio / TYC 1283-01226-1 event on 2023 Nov 25, 13:48 UT Visible from New Zealand, SE Australia Summary ------- On 2023 Nov 25 UT, the 83 km diameter asteroid (498) Tokio will occult a 10.5 mag star in the constellation Taurus for observers along a path across New Zealand, SE Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.13 mag to 12.49 mag (the magnitude of the asteroid) for at most 7.210 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 Nov 25, 13:44 - 2023 Nov 25, 13:53 * geocentric midpoint of event [JD]: 2460274.07541529 * magnitude of target star: 10.52 * magnitude drop [mag]: 2.13 * estimated maximum duration [s]: 7.210 * Moon: 96 % sunlit, 40° distance * Sun: 162° distance * rough path description: New Zealand, SE Australia The occultation path -------------------- * approximate projected width [km]: 185 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.001", 76°) * approx speed of asteroid's shadow [km/s]: 11.5076 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1283-01226-1 by 498 Tokio on 2023 Nov 25 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 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -52 17 17 .. .. .. .... 101 0 0 -53 2 24 13 52 41.3 0 61 -6 -52 5 4 .. .. .. -51 57 39 .. .. .. .... 102 0 0 -52 42 44 13 52 41.1 1 60 -6 -51 45 45 -53 41 59 -51 38 22 -53 50 0 0.92 103 0 0 -52 23 26 13 52 40.8 2 60 -7 -51 26 46 -53 22 20 -51 19 26 -53 30 18 1.42 104 0 0 -52 4 31 13 52 40.4 2 59 -8 -51 8 9 -53 3 3 -51 0 51 -53 10 59 1.61 105 0 0 -51 45 58 13 52 39.7 3 58 -8 -50 49 55 -52 44 10 -50 42 39 -52 52 2 1.71 106 0 0 -51 27 48 13 52 38.9 4 57 -9 -50 32 3 -52 25 40 -50 24 50 -52 33 30 1.78 107 0 0 -51 10 2 13 52 37.8 4 56 -9 -50 14 35 -52 7 34 -50 7 23 -52 15 21 1.82 108 0 0 -50 52 40 13 52 36.6 5 56 -10 -49 57 30 -51 49 53 -49 50 20 -51 57 37 1.85 109 0 0 -50 35 42 13 52 35.2 6 55 -11 -49 40 49 -51 32 37 -49 33 42 -51 40 18 1.88 110 0 0 -50 19 10 13 52 33.7 6 54 -11 -49 24 32 -51 15 46 -49 17 27 -51 23 25 1.89 111 0 0 -50 3 2 13 52 32.0 7 53 -12 -49 8 41 -50 59 21 -49 1 37 -51 6 58 1.91 112 0 0 -49 47 20 13 52 30.0 8 52 -12 -48 53 14 -50 43 23 -48 46 13 -50 50 56 1.92 113 0 0 -49 32 5 13 52 28.0 8 52 -13 -48 38 13 -50 27 50 -48 31 14 -50 35 22 1.93 114 0 0 -49 17 15 13 52 25.7 9 51 -14 -48 23 38 -50 12 45 -48 16 40 -50 20 14 1.94 115 0 0 -49 2 52 13 52 23.3 10 50 -14 -48 9 29 -49 58 6 -48 2 33 -50 5 33 1.95 116 0 0 -48 48 56 13 52 20.7 10 49 -15 -47 55 46 -49 43 55 -47 48 52 -49 51 20 1.95 117 0 0 -48 35 26 13 52 17.9 11 49 -15 -47 42 30 -49 30 11 -47 35 37 -49 37 34 1.96 118 0 0 -48 22 25 13 52 15.0 12 48 -16 -47 29 40 -49 16 56 -47 22 49 -49 24 17 1.96 119 0 0 -48 9 50 13 52 11.9 12 47 -16 -47 17 18 -49 4 8 -47 10 29 -49 11 27 1.97 120 0 0 -47 57 44 13 52 8.6 13 46 -17 -47 5 23 -48 51 49 -46 58 35 -48 59 6 1.97 121 0 0 -47 46 5 13 52 5.2 13 45 -17 -46 53 56 -48 39 58 -46 47 10 -48 47 14 1.97 122 0 0 -47 34 55 13 52 1.7 14 45 -18 -46 42 57 -48 28 36 -46 36 11 -48 35 50 1.98 123 0 0 -47 24 13 13 51 57.9 15 44 -18 -46 32 25 -48 17 43 -46 25 41 -48 24 56 1.98 124 0 0 -47 14 0 13 51 54.1 15 43 -19 -46 22 21 -48 7 19 -46 15 39 -48 14 30 1.98 125 0 0 -47 4 15 13 51 50.1 16 42 -19 -46 12 46 -47 57 24 -46 6 5 -48 4 34 1.98 126 0 0 -46 55 0 13 51 45.9 16 41 -19 -46 3 39 -47 47 59 -45 56 59 -47 55 7 1.99 127 0 0 -46 46 13 13 51 41.6 17 40 -20 -45 55 1 -47 39 3 -45 48 21 -47 46 10 1.99 128 0 0 -46 37 55 13 51 37.2 17 40 -20 -45 46 51 -47 30 36 -45 40 12 -47 37 42 1.99 129 0 0 -46 30 7 13 51 32.7 18 39 -21 -45 39 10 -47 22 40 -45 32 32 -47 29 44 1.99 130 0 0 -46 22 47 13 51 28.0 18 38 -21 -45 31 57 -47 15 13 -45 25 21 -47 22 16 1.99 131 0 0 -46 15 57 13 51 23.2 19 37 -21 -45 25 14 -47 8 15 -45 18 38 -47 15 18 1.99 132 0 0 -46 9 37 13 51 18.3 19 36 -21 -45 19 0 -47 1 48 -45 12 25 -47 8 50 2.00 133 0 0 -46 3 46 13 51 13.2 20 35 -22 -45 13 14 -46 55 51 -45 6 40 -47 2 52 2.00 134 0 0 -45 58 24 13 51 8.1 20 34 -22 -45 7 58 -46 50 24 -45 1 24 -46 57 24 2.00 135 0 0 -45 53 33 13 51 2.8 21 33 -22 -45 3 11 -46 45 27 -44 56 38 -46 52 26 2.00 136 0 0 -45 49 10 13 50 57.4 21 33 -23 -44 58 53 -46 41 0 -44 52 21 -46 47 59 2.00 137 0 0 -45 45 18 13 50 52.0 22 32 -23 -44 55 4 -46 37 4 -44 48 32 -46 44 2 2.00 138 0 0 -45 41 55 13 50 46.4 22 31 -23 -44 51 45 -46 33 37 -44 45 14 -46 40 35 2.00 139 0 0 -45 39 2 13 50 40.7 22 30 -23 -44 48 55 -46 30 41 -44 42 24 -46 37 38 2.00 140 0 0 -45 36 39 13 50 35.0 23 29 -23 -44 46 34 -46 28 16 -44 40 4 -46 35 12 2.00 141 0 0 -45 34 46 13 50 29.2 23 28 -23 -44 44 43 -46 26 20 -44 38 13 -46 33 16 2.00 142 0 0 -45 33 22 13 50 23.2 24 27 -24 -44 43 21 -46 24 55 -44 36 51 -46 31 51 2.00 143 0 0 -45 32 29 13 50 17.3 24 26 -24 -44 42 29 -46 24 0 -44 35 58 -46 30 56 2.01 144 0 0 -45 32 5 13 50 11.2 24 25 -24 -44 42 5 -46 23 35 -44 35 35 -46 30 31 2.01 145 0 0 -45 32 10 13 50 5.1 24 24 -24 -44 42 11 -46 23 40 -44 35 41 -46 30 36 2.01 146 0 0 -45 32 46 13 49 58.9 25 23 -24 -44 42 46 -46 24 16 -44 36 16 -46 31 12 2.01 147 0 0 -45 33 51 13 49 52.6 25 22 -24 -44 43 51 -46 25 22 -44 37 20 -46 32 17 2.01 148 0 0 -45 35 25 13 49 46.3 25 21 -24 -44 45 24 -46 26 57 -44 38 54 -46 33 54 2.01 149 0 0 -45 37 30 13 49 40.0 25 20 -24 -44 47 27 -46 29 3 -44 40 57 -46 36 0 2.01 150 0 0 -45 40 4 13 49 33.6 26 19 -24 -44 49 59 -46 31 40 -44 43 28 -46 38 36 2.01 151 0 0 -45 43 7 13 49 27.1 26 18 -24 -44 53 0 -46 34 46 -44 46 29 -46 41 43 2.01 152 0 0 -45 46 40 13 49 20.6 26 17 -24 -44 56 30 -46 38 21 -44 49 58 -46 45 19 2.01 153 0 0 -45 50 42 13 49 14.1 26 16 -23 -45 0 29 -46 42 27 -44 53 57 -46 49 25 2.01 154 0 0 -45 55 13 13 49 7.6 26 15 -23 -45 4 56 -46 47 3 -44 58 24 -46 54 1 2.01 155 0 0 -46 0 14 13 49 1.0 26 14 -23 -45 9 53 -46 52 8 -45 3 20 -46 59 7 2.01 156 0 0 -46 5 43 13 48 54.5 26 13 -23 -45 15 18 -46 57 43 -45 8 44 -47 4 42 2.02 157 0 0 -46 11 42 13 48 47.9 26 12 -23 -45 21 11 -47 3 47 -45 14 37 -47 10 47 2.02 158 0 0 -46 18 9 13 48 41.3 26 11 -23 -45 27 33 -47 10 20 -45 20 58 -47 17 22 2.02 159 0 0 -46 25 6 13 48 34.7 26 10 -22 -45 34 23 -47 17 23 -45 27 48 -47 24 26 2.02 160 0 0 -46 32 31 13 48 28.1 26 9 -22 -45 41 42 -47 24 55 -45 35 5 -47 31 59 2.02 161 0 0 -46 40 24 13 48 21.5 26 8 -22 -45 49 28 -47 32 56 -45 42 51 -47 40 0 2.02 162 0 0 -46 48 46 13 48 14.9 26 7 -22 -45 57 43 -47 41 26 -45 51 4 -47 48 31 2.02 163 0 0 -46 57 36 13 48 8.4 26 6 -21 -46 6 25 -47 50 24 -45 59 46 -47 57 31 2.02 164 0 0 -47 6 54 13 48 1.8 26 5 -21 -46 15 35 -47 59 52 -46 8 55 -48 7 0 2.02 165 0 0 -47 16 40 13 47 55.3 26 4 -21 -46 25 12 -48 9 47 -46 18 31 -48 16 57 2.03 166 0 0 -47 26 53 13 47 48.8 26 2 -20 -46 35 17 -48 20 11 -46 28 34 -48 27 22 2.03 167 0 0 -47 37 35 13 47 42.4 26 1 -20 -46 45 48 -48 31 3 -46 39 4 -48 38 15 2.03 168 0 0 -47 48 43 13 47 35.9 25 0 -20 -46 56 47 -48 42 22 -46 50 2 -48 49 36 2.03 169 0 0 -48 0 19 13 47 29.6 25 359 -19 -47 8 12 -48 54 10 -47 1 26 -49 1 25 2.03 170 0 0 -48 12 22 13 47 23.3 25 358 -19 -47 20 4 -49 6 25 -47 13 16 -49 13 42 2.03 171 0 0 -48 24 52 13 47 17.0 25 357 -18 -47 32 22 -49 19 7 -47 25 33 -49 26 26 2.03 172 0 0 -48 37 47 13 47 10.8 25 356 -18 -47 45 6 -49 32 16 -47 38 16 -49 39 37 2.03 173 0 0 -48 51 10 13 47 4.6 24 355 -18 -47 58 16 -49 45 52 -47 51 24 -49 53 14 2.04 174 0 0 -49 4 58 13 46 58.6 24 354 -17 -48 11 51 -49 59 54 -48 4 58 -50 7 19 2.04 175 0 0 -49 19 12 13 46 52.5 24 353 -17 -48 25 52 -50 14 23 -48 18 56 -50 21 49 2.04 176 0 0 -49 33 51 13 46 46.6 23 352 -16 -48 40 17 -50 29 17 -48 33 20 -50 36 46 2.04 177 0 0 -49 48 55 13 46 40.8 23 351 -16 -48 55 7 -50 44 37 -48 48 9 -50 52 8 2.04 178 0 0 -50 4 24 13 46 35.0 23 350 -15 -49 10 22 -51 0 23 -49 3 21 -51 7 56 2.04 179 0 0 -50 20 18 13 46 29.3 22 349 -15 -49 26 0 -51 16 33 -49 18 58 -51 24 9 2.04 180 0 0 -50 36 35 13 46 23.7 22 348 -14 -49 42 2 -51 33 8 -49 34 58 -51 40 46 2.05 -179 0 0 -50 53 17 13 46 18.3 22 347 -14 -49 58 28 -51 50 7 -49 51 21 -51 57 47 2.05 -178 0 0 -51 10 21 13 46 12.9 21 346 -13 -50 15 16 -52 7 29 -50 8 8 -52 15 13 2.05 -177 0 0 -51 27 49 13 46 7.6 21 345 -12 -50 32 27 -52 25 16 -50 25 16 -52 33 2 2.05 -176 0 0 -51 45 39 13 46 2.5 20 344 -12 -50 50 0 -52 43 25 -50 42 47 -52 51 13 2.05 -175 0 0 -52 3 51 13 45 57.4 20 343 -11 -51 7 54 -53 1 57 -51 0 39 -53 9 48 2.05 -174 0 0 -52 22 24 13 45 52.5 19 343 -11 -51 26 10 -53 20 50 -51 18 53 -53 28 45 2.05 -173 0 0 -52 41 19 13 45 47.7 19 342 -10 -51 44 46 -53 40 6 -51 37 26 -53 48 3 2.06 -172 0 0 -53 0 34 13 45 43.0 18 341 -9 -52 3 42 -53 59 42 -51 56 21 -54 7 43 2.06 -171 0 0 -53 20 10 13 45 38.4 18 340 -9 -52 22 59 -54 19 39 -52 15 34 -54 27 43 2.06 -170 0 0 -53 40 5 13 45 34.0 17 339 -8 -52 42 34 -54 39 56 -52 35 7 -54 48 3 2.06 -169 0 0 -54 0 19 13 45 29.7 17 338 -8 -53 2 28 -55 0 33 -52 54 59 -55 8 43 2.06 -168 0 0 -54 20 51 13 45 25.6 16 337 -7 -53 22 40 -55 21 28 -53 15 8 -55 29 41 2.06 -167 0 0 -54 41 42 13 45 21.6 16 336 -6 -53 43 10 -55 42 42 -53 35 35 -55 50 58 2.07 -166 0 0 -55 2 49 13 45 17.7 15 335 -6 -54 3 56 -56 4 13 -53 56 19 -56 12 33 2.07 -165 0 0 -55 24 13 13 45 14.0 15 334 -5 -54 24 59 -56 26 1 -54 17 19 -56 34 24 2.07 -164 0 0 -55 45 53 13 45 10.4 14 333 -4 -54 46 17 -56 48 5 -54 38 35 -56 56 32 2.07 -163 0 0 -56 7 48 13 45 7.0 13 332 -4 -55 7 50 -57 10 25 -55 0 5 -57 18 55 2.07 -162 0 0 -56 29 57 13 45 3.7 13 332 -3 -55 29 37 -57 32 59 -55 21 50 -57 41 33 2.07 -161 0 0 -56 52 20 13 45 0.6 12 331 -3 -55 51 38 -57 55 48 -55 43 48 -58 4 25 2.08 -160 0 0 -57 14 56 13 44 57.7 12 330 -2 -56 13 52 -58 18 49 -56 5 59 -58 27 30 2.08 -159 0 0 -57 37 44 13 44 54.9 11 329 -1 -56 36 17 -58 42 3 -56 28 21 -58 50 48 2.08 -158 0 0 -58 0 43 13 44 52.2 10 328 -1 -56 58 54 -59 5 29 -56 50 55 -59 14 17 2.08 -157 0 0 -58 23 53 13 44 49.7 10 327 0 -57 21 41 -59 29 5 -57 13 39 -59 37 57 2.09 -156 0 0 -58 47 13 13 44 47.4 9 326 1 -57 44 37 -59 52 51 -57 36 33 -60 1 47 2.09 -155 0 0 -59 10 41 13 44 45.2 9 325 1 -58 7 43 -60 16 45 -57 59 36 -60 25 45 2.09 -153 59 59 -59 34 17 13 44 43.2 8 324 2 -58 30 56 -60 40 48 -58 22 46 -60 49 51 2.09 -152 59 59 -59 58 0 13 44 41.4 7 324 3 -58 54 16 -61 4 57 -58 46 3 -61 14 4 2.10 -151 59 59 -60 21 49 13 44 39.7 7 323 3 -59 17 42 -61 29 12 -59 9 27 -61 38 23 2.10 -150 59 59 -60 45 42 13 44 38.1 6 322 4 -59 41 13 -61 53 32 -59 32 55 -62 2 47 2.11 -149 59 59 -61 9 40 13 44 36.7 6 321 5 -60 4 49 -62 17 56 -59 56 28 -62 27 15 2.11 -148 59 59 -61 33 41 13 44 35.5 5 320 5 -60 28 27 -62 42 23 -60 20 4 -62 51 45 2.12 -147 59 59 -61 57 44 13 44 34.4 4 319 6 -60 52 8 -63 6 51 -60 43 42 -63 16 17 2.13 -146 59 59 -62 21 48 13 44 33.5 4 318 6 -61 15 51 -63 31 20 -61 7 22 -63 40 50 2.14 -145 59 59 -62 45 52 13 44 32.7 3 317 7 -61 39 34 -63 55 49 -61 31 2 -64 5 22 2.15 -144 59 59 -63 9 55 13 44 32.1 3 316 8 -62 3 16 -64 20 16 -61 54 42 -64 29 53 2.17 -143 59 59 -63 33 56 13 44 31.6 2 316 8 -62 26 57 -64 44 40 -62 18 20 -64 54 21 2.21 -142 59 59 -63 57 53 13 44 31.3 1 315 9 -62 50 35 -65 9 1 -62 41 56 -65 18 45 2.27 -141 59 59 -64 21 47 13 44 31.0 1 314 9 -63 14 9 .. .. .. -63 5 28 .. .. .. 2.44 -140 59 59 -64 45 35 13 44 31.0 0 313 10 -63 37 39 .. .. .. -63 28 56 .. .. .. 3.79 0 0 0 .. .. .... .. .. .. .. .. .. -64 1 3 .. .. .. -63 52 18 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 1283-01226-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 16 38.4857 DE: +16 48 38.826 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 16 38.4858 DE: +16 48 38.826 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (498) Tokio asteroid class: approx. diameter [km]: 83 approx. diameter ["]: 0.072 distance from Earth [AU]: 1.59940 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#99 date of fit: 2023 Oct 09 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", 0.001", 75.556° remarks: * orbital elements for (498)Tokio : Mean anomaly = 68.1593237823 deg Arg. of pericenter = 241.8447222609 deg Long. of node = 97.1521964466 deg Inclination = 9.4997769944 deg Eccentricity = 0.2238668900 Semimajor axis = 2.6513351899 AU Perihelion dist = 2.0577890267 AU Mag: H = 8.91, G = 0.15 Epoch of elements : MJD 60273.57527778 TDT (2023 Nov 25.5753) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#992023Oct09,7.21,2023,11,25,13.809967,-0.111544,-0.887156,-6.444724,0.808347,-0.001708,0.000479,0.000001,0.000000 168.1111,16.8380,-30.42,-20.76,False TYC 1283-01226-1,5.27735713,16.8107852,0.00,10.52,0.00,0.0,0,,5.30062979,16.8380431,2.13,0.00,0,0,0 498,Tokio,12.49,83.000,1.5994,0,0,-2.468,4.44,,4.8,0 0,68.0280,2023,11,25,241.8447,97.1522,9.4998,0.22387,2.65134,2.05779,8.92,5.0,0.15 1.066,0.0127,0.0009,76,0.0127,Known errors,-1.00,0,-1,-1 20231125_1226-1,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org