IOTA/IOTA-ES occultation update for (588) Achilles / UCAC4 600-015410 event on 2023 Apr 04, 02:19 UT Visible from USA, Canada Summary ------- On 2023 Apr 04 UT, the 133.5 km diameter asteroid (588) Achilles will occult a 13.8 mag star in the constellation Auriga for observers along a path across USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.98 mag to 15.62 mag (the magnitude of the asteroid) for at most 4.650 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 Apr 04, 02:15 - 2023 Apr 04, 02:22 * geocentric midpoint of event [JD]: 2460038.59666929 * magnitude of target star: 13.83 * magnitude drop [mag]: 1.98 * estimated maximum duration [s]: 4.650 * Moon: 95 % sunlit, 93° distance * Sun: 62° distance * rough path description: USA, Canada The occultation path -------------------- * approximate projected width [km]: 155 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.003", 90°) * approx speed of asteroid's shadow [km/s]: 28.6734 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 600-015410 by 588 Achilles on 2023 Apr 4 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 100 0 0 28 58 24 2 16 0.5 0 56 40 .. .. .. 29 49 53 .. .. .. 29 58 55 .... 101 0 0 29 34 56 2 16 0.6 1 56 41 28 43 56 30 26 30 28 35 5 30 35 33 -0.52 102 0 0 30 11 27 2 16 0.8 3 57 41 29 20 21 31 3 5 29 11 30 31 12 9 -0.55 103 0 0 30 47 54 2 16 1.0 4 57 42 29 56 44 31 39 37 29 47 52 31 48 41 -0.57 104 0 0 31 24 16 2 16 1.4 5 58 42 30 33 3 32 16 3 30 24 10 32 25 8 -0.57 105 0 0 32 0 33 2 16 1.8 6 58 43 31 9 16 32 52 23 31 0 23 33 1 29 -0.58 106 0 0 32 36 43 2 16 2.3 7 59 43 31 45 23 33 28 36 31 36 29 33 37 42 -0.58 107 0 0 33 12 44 2 16 2.9 8 59 44 32 21 21 34 4 40 32 12 27 34 13 46 -0.58 108 0 0 33 48 35 2 16 3.6 9 60 44 32 57 11 34 40 33 32 48 16 34 49 40 -0.58 109 0 0 34 24 16 2 16 4.3 10 60 45 33 32 50 35 16 15 33 23 55 35 25 23 -0.59 110 0 0 34 59 45 2 16 5.1 11 61 45 34 8 18 35 51 45 33 59 23 36 0 53 -0.59 111 0 0 35 35 0 2 16 6.0 12 62 46 34 43 33 36 27 1 34 34 38 36 36 9 -0.59 112 0 0 36 10 1 2 16 7.0 13 62 46 35 18 34 37 2 2 35 9 39 37 11 10 -0.59 113 0 0 36 44 47 2 16 8.0 14 63 46 35 53 20 37 36 47 35 44 25 37 45 55 -0.59 114 0 0 37 19 16 2 16 9.1 15 63 46 36 27 50 38 11 15 36 18 56 38 20 23 -0.59 115 0 0 37 53 28 2 16 10.3 16 64 47 37 2 3 38 45 25 36 53 9 38 54 32 -0.59 116 0 0 38 27 21 2 16 11.5 17 65 47 37 35 58 39 19 16 37 27 4 39 28 23 -0.59 117 0 0 39 0 54 2 16 12.8 18 65 47 38 9 34 39 52 47 38 0 41 40 1 53 -0.59 118 0 0 39 34 7 2 16 14.1 19 66 47 38 42 50 40 25 57 38 33 57 40 35 2 -0.59 119 0 0 40 6 58 2 16 15.5 19 67 47 39 15 45 40 58 45 39 6 53 41 7 50 -0.59 120 0 0 40 39 28 2 16 17.0 20 68 48 39 48 19 41 31 10 39 39 27 41 40 14 -0.59 121 0 0 41 11 34 2 16 18.5 21 68 48 40 20 30 42 3 12 40 11 38 42 12 16 -0.59 122 0 0 41 43 17 2 16 20.0 22 69 48 40 52 17 42 34 50 40 43 27 42 43 53 -0.59 123 0 0 42 14 36 2 16 21.6 23 70 48 41 23 41 43 6 3 41 14 52 43 15 5 -0.59 124 0 0 42 45 29 2 16 23.2 24 71 48 41 54 40 43 36 51 41 45 52 43 45 51 -0.59 125 0 0 43 15 57 2 16 24.9 25 71 48 42 25 14 44 7 12 42 16 27 44 16 12 -0.59 126 0 0 43 45 59 2 16 26.6 26 72 48 42 55 23 44 37 7 42 46 36 44 46 6 -0.59 127 0 0 44 15 35 2 16 28.4 26 73 48 43 25 5 45 6 36 43 16 20 45 15 33 -0.59 128 0 0 44 44 43 2 16 30.1 27 74 48 43 54 20 45 35 36 43 45 36 45 44 32 -0.59 129 0 0 45 13 23 2 16 31.9 28 75 48 44 23 9 46 4 9 44 14 26 46 13 4 -0.59 130 0 0 45 41 36 2 16 33.8 29 76 47 44 51 29 46 32 14 44 42 48 46 41 7 -0.59 131 0 0 46 9 21 2 16 35.6 30 76 47 45 19 22 46 59 50 45 10 43 47 8 42 -0.59 132 0 0 46 36 38 2 16 37.5 30 77 47 45 46 47 47 26 58 45 38 9 47 35 48 -0.59 133 0 0 47 3 25 2 16 39.4 31 78 47 46 13 44 47 53 37 46 5 7 48 2 25 -0.59 134 0 0 47 29 44 2 16 41.3 32 79 47 46 40 12 48 19 46 46 31 36 48 28 33 -0.59 135 0 0 47 55 34 2 16 43.3 33 80 47 47 6 11 48 45 27 46 57 37 48 54 12 -0.59 136 0 0 48 20 55 2 16 45.3 33 81 46 47 31 41 49 10 38 47 23 9 49 19 21 -0.59 137 0 0 48 45 47 2 16 47.2 34 82 46 47 56 43 49 35 20 47 48 12 49 44 1 -0.59 138 0 0 49 10 9 2 16 49.2 35 83 46 48 21 15 49 59 32 48 12 46 50 8 12 -0.59 139 0 0 49 34 2 2 16 51.2 36 84 46 48 45 18 50 23 15 48 36 51 50 31 53 -0.59 140 0 0 49 57 26 2 16 53.2 36 85 45 49 8 52 50 46 28 49 0 27 50 55 4 -0.59 141 0 0 50 20 21 2 16 55.3 37 86 45 49 31 57 51 9 12 49 23 33 51 17 46 -0.59 142 0 0 50 42 46 2 16 57.3 38 87 45 49 54 33 51 31 27 49 46 11 51 40 0 -0.59 143 0 0 51 4 43 2 16 59.4 38 88 44 50 16 40 51 53 13 50 8 20 52 1 43 -0.59 144 0 0 51 26 11 2 17 1.4 39 89 44 50 38 18 52 14 30 50 30 0 52 22 58 -0.59 145 0 0 51 47 10 2 17 3.5 40 90 44 50 59 28 52 35 18 50 51 11 52 43 44 -0.59 146 0 0 52 7 40 2 17 5.5 40 91 43 51 20 8 52 55 37 51 11 54 53 4 2 -0.59 147 0 0 52 27 41 2 17 7.6 41 92 43 51 40 21 53 15 28 51 32 8 53 23 51 -0.59 148 0 0 52 47 15 2 17 9.6 41 93 43 52 0 5 53 34 50 51 51 54 53 43 11 -0.59 149 0 0 53 6 20 2 17 11.7 42 95 42 52 19 21 53 53 45 52 11 12 54 2 4 -0.59 150 0 0 53 24 58 2 17 13.8 43 96 42 52 38 9 54 12 11 52 30 2 54 20 28 -0.59 151 0 0 53 43 8 2 17 15.8 43 97 42 52 56 30 54 30 11 52 48 24 54 38 25 -0.59 152 0 0 54 0 50 2 17 17.9 44 98 41 53 14 23 54 47 42 53 6 19 54 55 55 -0.59 153 0 0 54 18 6 2 17 19.9 44 99 41 53 31 48 55 4 47 53 23 47 55 12 58 -0.59 154 0 0 54 34 54 2 17 22.0 45 100 41 53 48 47 55 21 25 53 40 47 55 29 34 -0.59 155 0 0 54 51 16 2 17 24.1 45 102 40 54 5 19 55 37 36 53 57 21 55 45 43 -0.59 156 0 0 55 7 12 2 17 26.1 46 103 40 54 21 25 55 53 21 54 13 29 56 1 27 -0.59 157 0 0 55 22 41 2 17 28.2 46 104 40 54 37 5 56 8 40 54 29 10 56 16 44 -0.59 158 0 0 55 37 45 2 17 30.2 47 105 39 54 52 18 56 23 34 54 44 25 56 31 36 -0.59 159 0 0 55 52 23 2 17 32.2 47 107 39 55 7 6 56 38 2 54 59 15 56 46 2 -0.59 160 0 0 56 6 36 2 17 34.3 48 108 38 55 21 29 56 52 5 55 13 39 57 0 3 -0.59 161 0 0 56 20 24 2 17 36.3 48 109 38 55 35 27 57 5 43 55 27 39 57 13 40 -0.59 162 0 0 56 33 47 2 17 38.3 49 110 38 55 48 59 57 18 57 55 41 13 57 26 52 -0.59 163 0 0 56 46 46 2 17 40.4 49 112 37 56 2 8 57 31 46 55 54 23 57 39 39 -0.59 164 0 0 56 59 21 2 17 42.4 49 113 37 56 14 52 57 44 12 56 7 8 57 52 3 -0.59 165 0 0 57 11 32 2 17 44.4 50 114 36 56 27 11 57 56 14 56 19 29 58 4 4 -0.59 166 0 0 57 23 19 2 17 46.4 50 116 36 56 39 7 58 7 52 56 31 27 58 15 41 -0.59 167 0 0 57 34 43 2 17 48.4 51 117 36 56 50 40 58 19 8 56 43 1 58 26 54 -0.59 168 0 0 57 45 44 2 17 50.4 51 118 35 57 1 49 58 30 0 56 54 12 58 37 45 -0.59 169 0 0 57 56 23 2 17 52.4 51 120 35 57 12 36 58 40 30 57 4 59 58 48 14 -0.59 170 0 0 58 6 38 2 17 54.4 52 121 34 57 22 59 58 50 38 57 15 24 58 58 20 -0.59 171 0 0 58 16 32 2 17 56.4 52 122 34 57 33 0 59 0 23 57 25 27 59 8 4 -0.59 172 0 0 58 26 3 2 17 58.4 53 124 34 57 42 39 59 9 47 57 35 7 59 17 27 -0.59 173 0 0 58 35 13 2 18 0.3 53 125 33 57 51 56 59 18 49 57 44 25 59 26 28 -0.59 174 0 0 58 44 1 2 18 2.3 53 127 33 58 0 51 59 27 30 57 53 21 59 35 7 -0.59 175 0 0 58 52 28 2 18 4.3 54 128 32 58 9 25 59 35 50 58 1 56 59 43 26 -0.59 176 0 0 59 0 33 2 18 6.2 54 130 32 58 17 37 59 43 49 58 10 9 59 51 24 -0.59 177 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-0.59 -106 0 0 52 39 49 2 20 45.6 49 256 -7 51 52 35 53 27 29 51 44 24 53 35 50 -0.59 -105 0 0 52 20 4 2 20 48.0 48 257 -7 51 32 39 53 7 54 51 24 26 53 16 17 -0.59 -104 0 0 51 59 49 2 20 50.3 48 258 -8 51 12 14 52 47 51 51 3 59 52 56 16 -0.60 -103 0 0 51 39 6 2 20 52.7 47 260 -9 50 51 21 52 27 19 50 43 3 52 35 46 -0.60 -102 0 0 51 17 55 2 20 55.1 47 261 -9 50 29 58 52 6 18 50 21 39 52 14 47 -0.60 -101 0 0 50 56 14 2 20 57.5 46 262 -10 50 8 7 51 44 48 49 59 46 51 53 19 -0.60 -100 0 0 50 34 4 2 20 59.9 45 263 -11 49 45 47 51 22 49 49 37 24 51 31 22 -0.60 - 99 0 0 50 11 25 2 21 2.2 45 265 -12 49 22 57 51 0 21 49 14 33 51 8 56 -0.60 - 98 0 0 49 48 17 2 21 4.6 44 266 -12 48 59 39 50 37 23 48 51 13 50 46 0 -0.60 - 97 0 0 49 24 39 2 21 7.0 44 267 -13 48 35 51 50 13 56 48 27 23 50 22 35 -0.60 - 96 0 0 49 0 32 2 21 9.4 43 268 -14 48 11 34 49 49 59 48 3 4 49 58 40 -0.60 - 95 0 0 48 35 56 2 21 11.8 42 269 -15 47 46 47 49 25 33 47 38 16 49 34 15 -0.60 - 94 0 0 48 10 50 2 21 14.2 42 270 -15 47 21 32 49 0 37 47 12 59 49 9 21 -0.60 - 93 0 0 47 45 15 2 21 16.6 41 272 -16 46 55 47 48 35 11 46 47 13 48 43 57 -0.60 - 92 0 0 47 19 10 2 21 19.0 40 273 -17 46 29 33 48 9 16 46 20 57 48 18 4 -0.60 - 91 0 0 46 52 36 2 21 21.3 40 274 -18 46 2 51 47 42 52 45 54 13 47 51 41 -0.60 - 90 0 0 46 25 34 2 21 23.7 39 275 -19 45 35 40 47 15 59 45 27 0 47 24 49 -0.60 - 89 0 0 45 58 3 2 21 26.1 38 276 -20 45 8 0 46 48 36 44 59 19 46 57 28 -0.60 - 88 0 0 45 30 3 2 21 28.4 37 277 -20 44 39 52 46 20 45 44 31 10 46 29 38 -0.60 - 87 0 0 45 1 35 2 21 30.7 37 278 -21 44 11 16 45 52 25 44 2 33 46 1 20 -0.60 - 86 0 0 44 32 39 2 21 33.0 36 279 -22 43 42 13 45 23 37 43 33 28 45 32 33 -0.60 - 85 0 0 44 3 15 2 21 35.3 35 280 -23 43 12 42 44 54 21 43 3 56 45 3 19 -0.60 - 84 0 0 43 33 25 2 21 37.6 34 281 -24 42 42 45 44 24 37 42 33 58 44 33 36 -0.60 - 83 0 0 43 3 8 2 21 39.8 33 282 -25 42 12 21 43 54 27 42 3 33 44 3 27 -0.60 - 82 0 0 42 32 25 2 21 42.0 33 283 -26 41 41 32 43 23 50 41 32 43 43 32 51 -0.60 - 81 0 0 42 1 16 2 21 44.2 32 283 -27 41 10 17 42 52 47 41 1 27 43 1 49 -0.60 - 80 0 0 41 29 42 2 21 46.4 31 284 -27 40 38 38 42 21 18 40 29 47 42 30 22 -0.61 - 79 0 0 40 57 44 2 21 48.5 30 285 -28 40 6 36 41 49 25 39 57 44 41 58 29 -0.61 - 78 0 0 40 25 23 2 21 50.6 29 286 -29 39 34 10 41 17 8 39 25 17 41 26 13 -0.61 - 77 0 0 39 52 38 2 21 52.6 28 287 -30 39 1 22 40 44 28 38 52 28 40 53 33 -0.61 - 76 0 0 39 19 32 2 21 54.6 27 288 -31 38 28 12 40 11 25 38 19 18 40 20 31 -0.61 - 75 0 0 38 46 4 2 21 56.6 26 288 -32 37 54 42 39 38 0 37 45 47 39 47 7 -0.61 - 74 0 0 38 12 17 2 21 58.5 25 289 -33 37 20 52 39 4 15 37 11 57 39 13 22 -0.61 - 73 0 0 37 38 10 2 22 0.4 25 290 -34 36 46 43 38 30 10 36 37 48 38 39 18 -0.61 - 72 0 0 37 3 44 2 22 2.2 24 291 -35 36 12 16 37 55 46 36 3 21 38 4 54 -0.61 - 71 0 0 36 29 1 2 22 4.0 23 291 -36 35 37 32 37 21 4 35 28 37 37 30 12 -0.61 - 70 0 0 35 54 2 2 22 5.7 22 292 -37 35 2 33 36 46 6 34 53 37 36 55 14 -0.62 - 69 0 0 35 18 48 2 22 7.3 21 293 -38 34 27 19 36 10 51 34 18 23 36 19 59 -0.62 - 68 0 0 34 43 20 2 22 8.9 20 293 -39 33 51 51 35 35 23 33 42 56 35 44 31 -0.62 - 67 0 0 34 7 39 2 22 10.4 19 294 -40 33 16 11 34 59 40 33 7 16 35 8 48 -0.62 - 66 0 0 33 31 46 2 22 11.9 18 295 -41 32 40 20 34 23 46 32 31 26 34 32 54 -0.62 - 65 0 0 32 55 43 2 22 13.2 17 295 -42 32 4 19 33 47 41 31 55 25 33 56 48 -0.62 - 64 0 0 32 19 31 2 22 14.5 16 296 -43 31 28 10 33 11 26 31 19 16 33 20 33 -0.63 - 63 0 0 31 43 11 2 22 15.8 15 296 -44 30 51 53 32 35 3 30 42 59 32 44 9 -0.63 - 62 0 0 31 6 45 2 22 16.9 14 297 -45 30 15 30 31 58 32 30 6 37 32 7 38 -0.63 - 61 0 0 30 30 13 2 22 18.0 13 297 -46 29 39 2 31 21 56 29 30 10 31 31 1 -0.64 - 60 0 0 29 53 37 2 22 19.0 11 298 -47 29 2 31 30 45 16 28 53 39 30 54 20 -0.64 - 59 0 0 29 16 58 2 22 19.9 10 299 -48 28 25 57 30 8 32 28 17 6 30 17 35 -0.64 - 58 0 0 28 40 19 2 22 20.8 9 299 -49 27 49 23 29 31 47 27 40 33 29 40 49 -0.65 - 57 0 0 28 3 39 2 22 21.5 8 300 -50 27 12 49 28 55 1 27 4 0 29 4 2 -0.66 - 56 0 0 27 27 0 2 22 22.2 7 300 -51 26 36 16 28 18 17 26 27 29 28 27 17 -0.67 - 55 0 0 26 50 25 2 22 22.8 6 300 -52 25 59 47 27 41 34 25 51 1 27 50 33 -0.68 - 54 0 0 26 13 53 2 22 23.2 5 301 -53 25 23 22 27 4 56 25 14 37 27 13 53 -0.70 - 53 0 0 25 37 27 2 22 23.6 4 301 -54 24 47 3 26 28 22 24 38 19 26 37 18 -0.73 - 52 0 0 25 1 7 2 22 23.9 3 302 -55 24 10 51 25 51 54 24 2 8 26 0 49 -0.78 - 51 0 0 24 24 55 2 22 24.1 2 302 -56 23 34 47 25 15 35 23 26 6 25 24 28 -0.89 - 50 0 0 23 48 53 2 22 24.2 1 303 -57 22 58 53 24 39 24 22 50 13 24 48 15 -1.35 - 49 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 24 3 23 .. .. .. 24 12 13 .... Uncertainty in time = +/- 2 secs Prediction of 2023 Mar 29.9 Data for the target star ------------------------ * name: UCAC4 600-015410 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 54 48.1375 DE: +29 51 55.865 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 54 48.1375 DE: +29 51 55.865 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 13.8 * B mag [mag]: 14.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (588) Achilles asteroid class: approx. diameter [km]: 134 approx. diameter ["]: 0.038 distance from Earth [AU]: 4.81380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#100 date of fit: 2023 Feb 07 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): 0.019", 0.003", 89.5° remarks: * orbital elements for (588)Achilles : Mean anomaly = 357.5699559397 deg Arg. of pericenter = 133.7052491973 deg Long. of node = 316.5364133946 deg Inclination = 10.3197314464 deg Eccentricity = 0.1482947284 Semimajor axis = 5.2097347295 AU Perihelion dist = 4.4371585329 AU Mag: H = 8.27, G = 0.15 Epoch of elements : MJD 60038.09666933 TDT (2023 Apr 04.0967) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1002023Feb07,4.65,2023,4,4,2.320063,0.027431,0.503811,16.159076,-0.898997,0.005161,0.000924,-0.000001,0.000000 -152.8868,29.9037,146.00,5.55,False UCAC4 600-015410,4.91337156,29.8655182,14.65,13.83,13.39,0.0,0,,4.93755857,29.9036503,1.06,0.55,1,0,1 588,Achilles,15.62,133.5,4.8138,0,0,2.270,-1.64,,8.2,0 0,357.5619,2023,4,4,133.7052,316.5364,10.3197,0.14829,5.20973,4.43716,8.27,5.0,0.15 1.087,0.0193,0.0031,89,0.0033,Known errors,1.02,-1,-1,-1 20230404_015410,60032.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Mar 29, 21:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org