IOTA/IOTA-ES occultation update for (3426) Seki / TYC 2484-00004-1 event on 2024 Oct 27, 09:51 UT Visible from Summary ------- On 2024 Oct 27 UT, the 16.1260680545318 km diameter asteroid (3426) Seki will occult a 9.5 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.01 mag to 18.51 mag (the magnitude of the asteroid) for at most 0.970 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: 74 * date and approx. time of event: 2024 Oct 27, 09:46 - 2024 Oct 27, 09:56 * geocentric midpoint of event [JD]: 2460610.91079817 * magnitude of target star: 9.50 * magnitude drop [mag]: 9.01 * estimated maximum duration [s]: 0.970 * Moon: 22 % sunlit, 34° distance * Sun: 89° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.76 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 113°) * approx speed of asteroid's shadow [km/s]: 16.7537 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2484-00004-1 by 3426 Seki on 2024 Oct 27 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 -159 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 26 38 21 .... -158 0 0 27 1 34 9 46 15.4 1 54 -74 26 54 55 27 8 15 26 44 49 27 18 24 .... -157 0 0 27 41 46 9 46 15.6 2 55 -74 27 35 5 27 48 28 27 24 56 27 58 39 -0.61 -156 0 0 28 22 8 9 46 16.1 3 55 -74 28 15 25 28 28 51 28 5 14 28 39 5 -0.63 -155 0 0 29 2 38 9 46 16.7 4 55 -73 28 55 54 29 9 23 28 45 42 29 19 39 -0.64 -154 0 0 29 43 16 9 46 17.4 5 56 -73 29 36 31 29 50 2 29 26 16 30 0 21 -0.65 -153 0 0 30 24 0 9 46 18.4 7 56 -72 30 17 13 30 30 47 30 6 56 30 41 7 -0.66 -152 0 0 31 4 47 9 46 19.5 8 57 -72 30 57 59 31 11 36 30 47 40 31 21 58 -0.66 -151 0 0 31 45 37 9 46 20.7 9 58 -71 31 38 47 31 52 26 31 28 27 32 2 51 -0.66 -150 0 0 32 26 27 9 46 22.1 10 58 -71 32 19 36 32 33 18 32 9 14 32 43 43 -0.66 -149 0 0 33 7 15 9 46 23.7 11 59 -70 33 0 24 33 14 7 32 50 0 33 24 35 -0.66 -148 0 0 33 48 1 9 46 25.4 12 59 -69 33 41 9 33 54 54 33 30 44 34 5 23 -0.67 -147 0 0 34 28 42 9 46 27.3 13 60 -68 34 21 49 34 35 36 34 11 23 34 46 7 -0.67 -146 0 0 35 9 17 9 46 29.3 14 60 -67 35 2 23 35 16 12 34 51 55 35 26 43 -0.67 -145 0 0 35 49 44 9 46 31.4 15 61 -67 35 42 49 35 56 39 35 32 20 36 7 12 -0.67 -144 0 0 36 30 0 9 46 33.7 16 62 -66 36 23 5 36 36 57 36 12 35 36 47 30 -0.67 -143 0 0 37 10 6 9 46 36.1 17 62 -65 37 3 10 37 17 3 36 52 39 37 27 37 -0.67 -142 0 0 37 49 58 9 46 38.7 18 63 -64 37 43 2 37 56 55 37 32 30 38 7 30 -0.67 -141 0 0 38 29 36 9 46 41.3 19 64 -63 38 22 39 38 36 33 38 12 7 38 47 9 -0.67 -140 0 0 39 8 57 9 46 44.1 20 64 -62 39 2 0 39 15 55 38 51 28 39 26 31 -0.67 -139 0 0 39 48 0 9 46 47.0 21 65 -61 39 41 3 39 54 58 39 30 31 40 5 35 -0.67 -138 0 0 40 26 45 9 46 50.0 22 66 -60 40 19 47 40 33 43 40 9 15 40 44 19 -0.67 -137 0 0 41 5 8 9 46 53.0 23 67 -59 40 58 11 41 12 6 40 47 38 41 22 43 -0.67 -136 0 0 41 43 10 9 46 56.2 24 68 -59 41 36 12 41 50 7 41 25 40 42 0 44 -0.67 -135 0 0 42 20 48 9 46 59.5 25 68 -58 42 13 51 42 27 45 42 3 19 42 38 21 -0.67 -134 0 0 42 58 1 9 47 2.8 26 69 -57 42 51 5 43 4 58 42 40 33 43 15 34 -0.67 -133 0 0 43 34 49 9 47 6.2 27 70 -56 43 27 53 43 41 46 43 17 22 43 52 21 -0.67 -132 0 0 44 11 10 9 47 9.7 28 71 -55 44 4 14 44 18 6 43 53 44 44 28 40 -0.67 -131 0 0 44 47 2 9 47 13.2 29 72 -54 44 40 7 44 53 58 44 29 38 45 4 31 -0.67 -130 0 0 45 22 26 9 47 16.8 29 73 -53 45 15 32 45 29 21 45 5 3 45 39 54 -0.67 -129 0 0 45 57 20 9 47 20.5 30 74 -52 45 50 27 46 4 15 45 39 59 46 14 46 -0.67 -128 0 0 46 31 44 9 47 24.2 31 75 -51 46 24 51 46 38 37 46 14 25 46 49 7 -0.67 -127 0 0 47 5 36 9 47 27.9 32 76 -50 46 58 44 47 12 28 46 48 19 47 22 57 -0.67 -126 0 0 47 38 56 9 47 31.7 33 77 -50 47 32 5 47 45 47 47 21 42 47 56 14 -0.67 -125 0 0 48 11 43 9 47 35.6 34 78 -49 48 4 53 48 18 33 47 54 32 48 28 58 -0.67 -124 0 0 48 43 57 9 47 39.4 34 79 -48 48 37 8 48 50 46 48 26 49 49 1 9 -0.67 -123 0 0 49 15 37 9 47 43.3 35 80 -47 49 8 50 49 22 25 48 58 32 49 32 47 -0.67 -122 0 0 49 46 44 9 47 47.2 36 81 -46 49 39 58 49 53 30 49 29 42 50 3 50 -0.67 -121 0 0 50 17 15 9 47 51.1 37 82 -45 50 10 31 50 24 1 50 0 17 50 34 18 -0.67 -120 0 0 50 47 13 9 47 55.0 37 83 -45 50 40 29 50 53 56 50 30 18 51 4 11 -0.67 -119 0 0 51 16 35 9 47 58.9 38 84 -44 51 9 53 51 23 17 50 59 44 51 33 30 -0.67 -118 0 0 51 45 22 9 48 2.8 39 85 -43 51 38 42 51 52 3 51 28 35 52 2 13 -0.67 -117 0 0 52 13 34 9 48 6.8 39 86 -42 52 6 55 52 20 13 51 56 51 52 30 21 -0.67 -116 0 0 52 41 11 9 48 10.7 40 87 -41 52 34 34 52 47 49 52 24 32 52 57 54 -0.67 -115 0 0 53 8 13 9 48 14.6 41 88 -41 53 1 37 53 14 49 52 51 38 53 24 52 -0.67 -114 0 0 53 34 39 9 48 18.6 41 90 -40 53 28 6 53 41 14 53 18 9 53 51 14 -0.67 -113 0 0 54 0 31 9 48 22.5 42 91 -39 53 53 59 54 7 4 53 44 5 54 17 1 -0.67 -112 0 0 54 25 48 9 48 26.4 42 92 -39 54 19 17 54 32 19 54 9 26 54 42 13 -0.67 -111 0 0 54 50 30 9 48 30.3 43 93 -38 54 44 1 54 56 59 54 34 12 55 6 51 -0.67 -110 0 0 55 14 37 9 48 34.1 43 95 -37 55 8 11 55 21 5 54 58 24 55 30 54 -0.67 -109 0 0 55 38 11 9 48 38.0 44 96 -36 55 31 46 55 44 36 55 22 2 55 54 23 -0.67 -108 0 0 56 1 10 9 48 41.8 44 97 -36 55 54 47 56 7 34 55 45 7 56 17 18 -0.67 -107 0 0 56 23 36 9 48 45.7 45 98 -35 56 17 15 56 29 58 56 7 37 56 39 39 -0.67 -106 0 0 56 45 29 9 48 49.5 45 100 -34 56 39 10 56 51 49 56 29 34 57 1 27 -0.67 -105 0 0 57 6 49 9 48 53.2 46 101 -34 57 0 31 57 13 7 56 50 59 57 22 42 -0.67 -104 0 0 57 27 36 9 48 57.0 46 102 -33 57 21 20 57 33 52 57 11 51 57 43 24 -0.67 -103 0 0 57 47 51 9 49 0.7 47 104 -32 57 41 37 57 54 5 57 32 10 58 3 35 -0.67 -102 0 0 58 7 34 9 49 4.4 47 105 -32 58 1 22 58 13 46 57 51 58 58 23 13 -0.67 -101 0 0 58 26 46 9 49 8.1 48 106 -31 58 20 36 58 32 56 58 11 15 58 42 20 -0.67 -100 0 0 58 45 27 9 49 11.7 48 108 -31 58 39 19 58 51 36 58 30 0 59 0 57 -0.67 - 99 0 0 59 3 37 9 49 15.3 49 109 -30 58 57 31 59 9 44 58 48 15 59 19 3 -0.67 - 98 0 0 59 21 18 9 49 18.9 49 110 -29 59 15 13 59 27 23 59 6 0 59 36 38 -0.67 - 97 0 0 59 38 29 9 49 22.5 49 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33 52 64 14 40 64 42 11 -0.67 - 71 0 0 64 35 10 9 50 46.4 55 151 -16 64 29 43 64 40 36 64 21 28 64 48 54 -0.67 - 70 0 0 64 41 35 9 50 49.4 56 152 -15 64 36 10 64 47 1 64 27 56 64 55 17 -0.67 - 69 0 0 64 47 41 9 50 52.3 56 154 -15 64 42 17 64 53 6 64 34 4 65 1 21 -0.67 - 68 0 0 64 53 28 9 50 55.2 56 155 -14 64 48 5 64 58 53 64 39 53 65 7 6 -0.67 - 67 0 0 64 58 57 9 50 58.1 56 157 -14 64 53 34 65 4 20 64 45 23 65 12 32 -0.67 - 66 0 0 65 4 6 9 51 1.0 56 158 -14 64 58 44 65 9 29 64 50 35 65 17 40 -0.67 - 65 0 0 65 8 57 9 51 3.9 56 160 -13 65 3 36 65 14 19 64 55 28 65 22 29 -0.67 - 64 0 0 65 13 30 9 51 6.8 56 162 -13 65 8 9 65 18 51 65 0 2 65 27 0 -0.67 - 63 0 0 65 17 45 9 51 9.6 56 163 -12 65 12 24 65 23 5 65 4 18 65 31 13 -0.67 - 62 0 0 65 21 41 9 51 12.5 56 165 -12 65 16 21 65 27 1 65 8 16 65 35 8 -0.67 - 61 0 0 65 25 20 9 51 15.3 56 166 -11 65 20 1 65 30 40 65 11 56 65 38 46 -0.67 - 60 0 0 65 28 41 9 51 18.1 56 168 -11 65 23 22 65 34 0 65 15 19 65 42 6 -0.67 - 59 0 0 65 31 45 9 51 20.9 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6 61 17 34 61 46 59 -0.67 - 7 0 0 61 18 32 9 53 51.2 49 247 11 61 12 41 61 24 25 61 3 47 61 33 20 -0.67 - 6 0 0 61 4 24 9 53 54.4 48 248 11 60 58 30 61 10 17 60 49 34 61 19 16 -0.67 - 5 0 0 60 49 48 9 53 57.7 48 249 12 60 43 53 60 55 43 60 34 54 61 4 44 -0.67 - 4 0 0 60 34 45 9 54 1.0 47 251 12 60 28 49 60 40 43 60 19 48 60 49 46 -0.67 - 3 0 0 60 19 15 9 54 4.3 47 252 13 60 13 17 60 25 14 60 4 13 60 34 20 -0.67 - 2 0 0 60 3 17 9 54 7.6 47 253 13 59 57 17 60 9 18 59 48 11 60 18 27 -0.67 - 1 0 0 59 46 51 9 54 11.0 46 255 14 59 40 49 59 52 53 59 31 40 60 2 5 -0.67 0 0 0 59 29 55 9 54 14.3 46 256 14 59 23 52 59 35 59 59 14 40 59 45 14 -0.67 1 0 0 59 12 31 9 54 17.7 45 257 15 59 6 25 59 18 37 58 57 11 59 27 54 -0.67 2 0 0 58 54 36 9 54 21.1 45 259 15 58 48 29 59 0 44 58 39 12 59 10 4 -0.67 3 0 0 58 36 12 9 54 24.6 44 260 16 58 30 2 58 42 21 58 20 42 58 51 44 -0.67 4 0 0 58 17 16 9 54 28.0 44 261 16 58 11 5 58 23 28 58 1 43 58 32 53 -0.67 5 0 0 57 57 50 9 54 31.5 43 262 17 57 51 37 58 4 3 57 42 12 58 13 32 -0.67 6 0 0 57 37 52 9 54 35.0 43 264 17 57 31 38 57 44 7 57 22 9 57 53 38 -0.67 7 0 0 57 17 23 9 54 38.4 42 265 18 57 11 6 57 23 40 57 1 35 57 33 14 -0.67 8 0 0 56 56 21 9 54 42.0 42 266 18 56 50 3 57 2 40 56 40 29 57 12 16 -0.67 9 0 0 56 34 46 9 54 45.5 41 267 19 56 28 26 56 41 7 56 18 50 56 50 47 -0.67 10 0 0 56 12 39 9 54 49.0 41 268 19 56 6 17 56 19 2 55 56 38 56 28 44 -0.67 11 0 0 55 49 58 9 54 52.6 40 270 20 55 43 34 55 56 23 55 33 52 56 6 8 -0.67 12 0 0 55 26 44 9 54 56.1 40 271 20 55 20 18 55 33 10 55 10 33 55 42 58 -0.68 13 0 0 55 2 56 9 54 59.7 39 272 21 54 56 28 55 9 24 54 46 40 55 19 14 -0.68 14 0 0 54 38 33 9 55 3.3 39 273 22 54 32 4 54 45 3 54 22 14 54 54 57 -0.68 15 0 0 54 13 36 9 55 6.9 38 274 22 54 7 5 54 20 8 53 57 12 54 30 4 -0.68 16 0 0 53 48 5 9 55 10.4 37 275 23 53 41 32 53 54 38 53 31 36 54 4 37 -0.68 17 0 0 53 21 59 9 55 14.0 37 276 23 53 15 24 53 28 34 53 5 26 53 38 35 -0.68 18 0 0 52 55 17 9 55 17.6 36 277 24 52 48 41 53 1 54 52 38 41 53 11 58 -0.68 19 0 0 52 28 1 9 55 21.2 35 278 24 52 21 24 52 34 40 52 11 20 52 44 46 -0.68 20 0 0 52 0 10 9 55 24.7 35 280 25 51 53 31 52 6 50 51 43 25 52 16 59 -0.68 21 0 0 51 31 44 9 55 28.3 34 281 25 51 25 3 51 38 26 51 14 55 51 48 37 -0.68 22 0 0 51 2 43 9 55 31.8 33 282 26 50 56 1 51 9 26 50 45 50 51 19 40 -0.68 23 0 0 50 33 7 9 55 35.3 33 283 26 50 26 23 50 39 52 50 16 11 50 50 8 -0.68 24 0 0 50 2 57 9 55 38.8 32 284 27 49 56 12 50 9 43 49 45 57 50 20 1 -0.68 25 0 0 49 32 12 9 55 42.3 31 285 28 49 25 25 49 38 59 49 15 9 49 49 19 -0.68 26 0 0 49 0 53 9 55 45.7 30 286 28 48 54 5 49 7 42 48 43 47 49 18 4 -0.68 27 0 0 48 29 1 9 55 49.1 29 286 29 48 22 12 48 35 50 48 11 51 48 46 14 -0.69 28 0 0 47 56 35 9 55 52.5 29 287 29 47 49 45 48 3 26 47 39 23 48 13 51 -0.69 29 0 0 47 23 36 9 55 55.8 28 288 30 47 16 45 47 30 28 47 6 22 47 40 55 -0.69 30 0 0 46 50 6 9 55 59.1 27 289 30 46 43 14 46 56 59 46 32 49 47 7 27 -0.69 31 0 0 46 16 4 9 56 2.3 26 290 31 46 9 11 46 22 57 45 58 44 46 33 27 -0.69 32 0 0 45 41 31 9 56 5.5 25 291 31 45 34 37 45 48 25 45 24 9 45 58 56 -0.69 33 0 0 45 6 27 9 56 8.6 24 292 32 44 59 33 45 13 23 44 49 4 45 23 55 -0.69 34 0 0 44 30 55 9 56 11.6 24 293 32 44 24 0 44 37 51 44 13 31 44 48 24 -0.69 35 0 0 43 54 55 9 56 14.6 23 293 33 43 47 59 44 1 51 43 37 29 44 12 25 -0.70 36 0 0 43 18 27 9 56 17.4 22 294 33 43 11 31 43 25 24 43 1 0 43 35 59 -0.70 37 0 0 42 41 33 9 56 20.2 21 295 34 42 34 37 42 48 30 42 24 5 42 59 6 -0.70 38 0 0 42 4 14 9 56 22.9 20 296 34 41 57 17 42 11 12 41 46 45 42 21 47 -0.70 39 0 0 41 26 31 9 56 25.5 19 297 35 41 19 34 41 33 29 41 9 2 41 44 5 -0.70 40 0 0 40 48 26 9 56 28.1 18 297 35 40 41 29 40 55 23 40 30 56 41 5 59 -0.70 41 0 0 40 9 59 9 56 30.5 17 298 35 40 3 2 40 16 57 39 52 30 40 27 33 -0.71 42 0 0 39 31 12 9 56 32.7 16 299 36 39 24 16 39 38 10 39 13 44 39 48 46 -0.71 43 0 0 38 52 8 9 56 34.9 15 299 36 38 45 11 38 59 5 38 34 39 39 9 40 -0.71 44 0 0 38 12 46 9 56 37.0 14 300 36 38 5 49 38 19 43 37 55 18 38 30 18 -0.72 45 0 0 37 33 9 9 56 38.9 13 301 37 37 26 13 37 40 5 37 15 42 37 50 39 -0.72 46 0 0 36 53 17 9 56 40.7 12 301 37 36 46 22 37 0 14 36 35 52 37 10 47 -0.72 47 0 0 36 13 14 9 56 42.4 11 302 37 36 6 19 36 20 10 35 55 51 36 30 42 -0.73 48 0 0 35 33 0 9 56 43.9 10 303 38 35 26 6 35 39 55 35 15 38 35 50 27 -0.74 49 0 0 34 52 37 9 56 45.3 9 303 38 34 45 44 34 59 31 34 35 17 35 10 2 -0.74 50 0 0 34 12 7 9 56 46.5 8 304 38 34 5 15 34 19 0 33 54 49 34 29 29 -0.75 51 0 0 33 31 31 9 56 47.6 7 304 38 33 24 40 33 38 24 33 14 16 33 48 51 -0.77 52 0 0 32 50 52 9 56 48.5 6 305 38 32 44 1 32 57 43 32 33 39 33 8 9 -0.78 53 0 0 32 10 10 9 56 49.3 4 305 38 32 3 20 32 17 0 31 53 0 32 27 24 -0.81 54 0 0 31 29 27 9 56 49.9 3 306 38 31 22 39 31 36 16 31 12 20 31 46 39 -0.85 55 0 0 30 48 46 9 56 50.3 2 307 39 30 41 59 30 55 34 30 31 42 31 5 55 -0.94 56 0 0 30 8 8 9 56 50.6 1 307 39 30 1 22 30 14 54 29 51 7 30 25 13 -1.19 57 0 0 29 27 34 9 56 50.7 0 308 39 29 20 50 29 34 19 .. .. .. 29 44 36 -7.69 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 2484-00004-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 46 16.4774 DE: +32 13 49.213 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 46 16.4776 DE: +32 13 49.213 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.5 * B mag [mag]: 10.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3426) Seki asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.70150 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 date of fit: 2023 Apr 27 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): 0.014", 0.002", 112.918° remarks: * orbital elements for (3426)Seki : Mean anomaly = 200.6310080710 deg Arg. of pericenter = 261.6495700296 deg Long. of node = 5.4207707946 deg Inclination = 13.1235835755 deg Eccentricity = 0.0971172140 Semimajor axis = 2.6191925146 AU Perihelion dist = 2.3648238347 AU Mag: H = 13.06, G = 0.15 Epoch of elements : MJD 60610.41079700 TDT (2024 Oct 27.4108) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr27,0.97,2024,10,27,9.859156,-0.018020,0.549306,9.451251,0.307341,-0.005627,0.001636,0.000000,0.000000 -52.1871,32.1391,28.07,-13.01,False TYC 2484-00004-1,8.77124370,32.2303371,10.14,9.50,9.15,0.1,0,,8.79675795,32.1391327,9.01,8.91,0,0,0 3426,Seki,18.51,16.322,2.7015,0,0,2.422,1.00,,1.0,0 0,200.5355,2024,10,27,261.6496,5.4208,13.1236,0.09712,2.61919,2.36482,13.06,5.0,0.15 1.760,0.0143,0.0022,113,0.0063,Known errors,1.02,0,-1,-1 20241027_0004-1,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:53 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org