IOTA/IOTA-ES occultation update for (1628) Strobel / TYC 227-01639-1 event on 2024 Oct 02, 03:08 UT Visible from Summary ------- On 2024 Oct 02 UT, the 57.102 km diameter asteroid (1628) Strobel will occult a 10.3 mag star in the constellation Hydra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.74 mag to 16.03 mag (the magnitude of the asteroid) for at most 1.570 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 02, 03:06 - 2024 Oct 02, 03:10 * geocentric midpoint of event [JD]: 2460585.63086933 * magnitude of target star: 10.30 * magnitude drop [mag]: 5.74 * estimated maximum duration [s]: 1.570 * Moon: 0 % sunlit, 44° distance * Sun: 50° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 79 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.001", 95°) * approx speed of asteroid's shadow [km/s]: 36.3832 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 227-01639-1 by 1628 Strobel on 2024 Oct 2 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 - 7 0 0 -24 34 42 3 6 20.6 1 88 -40 -24 56 15 -24 13 17 -25 2 44 -24 6 54 .... - 6 0 0 -24 33 43 3 6 20.7 2 88 -39 -24 55 15 -24 12 18 -25 1 44 -24 5 55 0.70 - 5 0 0 -24 33 10 3 6 20.8 3 87 -39 -24 54 43 -24 11 46 -25 1 12 -24 5 22 0.79 - 4 0 0 -24 33 4 3 6 21.1 4 87 -38 -24 54 36 -24 11 39 -25 1 6 -24 5 16 0.84 - 3 0 0 -24 33 24 3 6 21.3 4 86 -37 -24 54 57 -24 11 59 -25 1 26 -24 5 36 0.86 - 2 0 0 -24 34 11 3 6 21.7 5 86 -36 -24 55 44 -24 12 46 -25 2 13 -24 6 22 0.88 - 1 0 0 -24 35 25 3 6 22.0 6 85 -35 -24 56 58 -24 13 59 -25 3 27 -24 7 35 0.89 0 0 0 -24 37 5 3 6 22.5 7 85 -34 -24 58 38 -24 15 39 -25 5 7 -24 9 15 0.90 1 0 0 -24 39 11 3 6 23.0 8 85 -34 -25 0 45 -24 17 45 -25 7 15 -24 11 21 0.91 2 0 0 -24 41 44 3 6 23.6 9 84 -33 -25 3 19 -24 20 17 -25 9 48 -24 13 53 0.91 3 0 0 -24 44 44 3 6 24.2 10 84 -32 -25 6 19 -24 23 16 -25 12 49 -24 16 52 0.92 4 0 0 -24 48 10 3 6 24.9 11 83 -31 -25 9 46 -24 26 41 -25 16 16 -24 20 17 0.92 5 0 0 -24 52 2 3 6 25.7 12 83 -30 -25 13 39 -24 30 33 -25 20 9 -24 24 8 0.93 6 0 0 -24 56 21 3 6 26.5 13 82 -29 -25 17 58 -24 34 51 -25 24 29 -24 28 26 0.93 7 0 0 -25 1 6 3 6 27.4 13 82 -28 -25 22 45 -24 39 35 -25 29 16 -24 33 10 0.93 8 0 0 -25 6 18 3 6 28.3 14 81 -27 -25 27 57 -24 44 46 -25 34 29 -24 38 20 0.93 9 0 0 -25 11 55 3 6 29.3 15 81 -27 -25 33 36 -24 50 22 -25 40 8 -24 43 56 0.94 10 0 0 -25 17 59 3 6 30.3 16 80 -26 -25 39 41 -24 56 25 -25 46 13 -24 49 58 0.94 11 0 0 -25 24 29 3 6 31.4 17 80 -25 -25 46 12 -25 2 53 -25 52 44 -24 56 26 0.94 12 0 0 -25 31 24 3 6 32.6 18 79 -24 -25 53 9 -25 9 48 -25 59 42 -25 3 20 0.94 13 0 0 -25 38 46 3 6 33.8 19 79 -23 -26 0 32 -25 17 8 -26 7 5 -25 10 40 0.94 14 0 0 -25 46 33 3 6 35.1 20 78 -22 -26 8 20 -25 24 53 -26 14 54 -25 18 25 0.94 15 0 0 -25 54 45 3 6 36.4 20 78 -21 -26 16 35 -25 33 4 -26 23 9 -25 26 35 0.94 16 0 0 -26 3 23 3 6 37.8 21 77 -20 -26 25 14 -25 41 41 -26 31 49 -25 35 11 0.95 17 0 0 -26 12 27 3 6 39.3 22 77 -19 -26 34 19 -25 50 42 -26 40 55 -25 44 12 0.95 18 0 0 -26 21 55 3 6 40.8 23 76 -18 -26 43 50 -26 0 9 -26 50 26 -25 53 39 0.95 19 0 0 -26 31 49 3 6 42.3 24 75 -17 -26 53 45 -26 10 0 -27 0 21 -26 3 30 0.95 20 0 0 -26 42 7 3 6 43.9 25 75 -17 -27 4 5 -26 20 17 -27 10 42 -26 13 45 0.95 21 0 0 -26 52 49 3 6 45.6 25 74 -16 -27 14 50 -26 30 57 -27 21 27 -26 24 25 0.95 22 0 0 -27 3 56 3 6 47.3 26 73 -15 -27 25 59 -26 42 2 -27 32 37 -26 35 30 0.95 23 0 0 -27 15 27 3 6 49.0 27 73 -14 -27 37 32 -26 53 31 -27 44 11 -26 46 58 0.95 24 0 0 -27 27 22 3 6 50.8 28 72 -13 -27 49 29 -27 5 24 -27 56 9 -26 58 50 0.95 25 0 0 -27 39 41 3 6 52.6 29 71 -12 -28 1 50 -27 17 40 -28 8 30 -27 11 6 0.95 26 0 0 -27 52 23 3 6 54.5 29 71 -11 -28 14 34 -27 30 20 -28 21 15 -27 23 45 0.95 27 0 0 -28 5 28 3 6 56.5 30 70 -10 -28 27 42 -27 43 23 -28 34 24 -27 36 47 0.95 28 0 0 -28 18 56 3 6 58.5 31 69 -9 -28 41 12 -27 56 48 -28 47 55 -27 50 12 0.95 29 0 0 -28 32 47 3 7 0.5 32 68 -8 -28 55 5 -28 10 37 -29 1 49 -28 3 59 0.95 30 0 0 -28 47 0 3 7 2.5 32 67 -7 -29 9 21 -28 24 47 -29 16 5 -28 18 9 0.96 31 0 0 -29 1 35 3 7 4.7 33 67 -7 -29 23 59 -28 39 19 -29 30 43 -28 32 41 0.96 32 0 0 -29 16 31 3 7 6.8 34 66 -6 -29 38 58 -28 54 13 -29 45 43 -28 47 34 0.96 33 0 0 -29 31 49 3 7 9.0 35 65 -5 -29 54 18 -29 9 29 -30 1 5 -29 2 48 0.96 34 0 0 -29 47 28 3 7 11.2 35 64 -4 -30 10 0 -29 25 5 -30 16 47 -29 18 24 0.96 35 0 0 -30 3 27 3 7 13.5 36 63 -3 -30 26 2 -29 41 1 -30 32 50 -29 34 19 0.96 36 0 0 -30 19 46 3 7 15.8 37 62 -2 -30 42 24 -29 57 18 -30 49 13 -29 50 35 0.96 37 0 0 -30 36 26 3 7 18.1 37 61 -1 -30 59 6 -30 13 54 -31 5 56 -30 7 11 0.96 38 0 0 -30 53 24 3 7 20.5 38 60 0 -31 16 7 -30 30 50 -31 22 58 -30 24 6 0.96 39 0 0 -31 10 42 3 7 22.8 38 59 1 -31 33 28 -30 48 5 -31 40 19 -30 41 20 0.96 40 0 0 -31 28 18 3 7 25.3 39 58 2 -31 51 7 -31 5 38 -31 57 59 -30 58 52 0.96 41 0 0 -31 46 12 3 7 27.7 40 57 2 -32 9 3 -31 23 29 -32 15 57 -31 16 43 0.96 42 0 0 -32 4 23 3 7 30.2 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43 3 8 4.0 45 38 14 -36 47 15 -36 0 21 -36 54 20 -35 53 23 0.96 56 0 0 -36 45 5 3 8 6.7 45 37 15 -37 8 40 -36 21 41 -37 15 46 -36 14 42 0.96 57 0 0 -37 6 37 3 8 9.4 46 35 16 -37 30 14 -36 43 10 -37 37 21 -36 36 10 0.96 58 0 0 -37 28 17 3 8 12.1 46 34 16 -37 51 57 -37 4 48 -37 59 5 -36 57 47 0.96 59 0 0 -37 50 5 3 8 14.7 46 32 17 -38 13 48 -37 26 34 -38 20 56 -37 19 32 0.96 60 0 0 -38 12 1 3 8 17.4 46 31 18 -38 35 45 -37 48 27 -38 42 55 -37 41 24 0.96 61 0 0 -38 34 3 3 8 20.1 46 29 18 -38 57 50 -38 10 26 -39 5 0 -38 3 23 0.96 62 0 0 -38 56 11 3 8 22.7 46 28 19 -39 20 0 -38 32 32 -39 27 11 -38 25 28 0.96 63 0 0 -39 18 24 3 8 25.4 46 26 20 -39 42 16 -38 54 43 -39 49 27 -38 47 39 0.96 64 0 0 -39 40 42 3 8 28.0 46 25 21 -40 4 36 -39 16 59 -40 11 48 -39 9 54 0.96 65 0 0 -40 3 4 3 8 30.7 46 23 21 -40 27 0 -39 39 19 -40 34 12 -39 32 13 0.96 66 0 0 -40 25 29 3 8 33.3 46 22 22 -40 49 27 -40 1 42 -40 56 40 -39 54 36 0.96 67 0 0 -40 47 57 3 8 35.9 46 20 23 -41 11 56 -40 24 7 -41 19 10 -40 17 1 0.96 68 0 0 -41 10 26 3 8 38.5 46 19 23 -41 34 28 -40 46 35 -41 41 42 -40 39 28 0.96 69 0 0 -41 32 57 3 8 41.1 46 17 24 -41 57 0 -41 9 5 -42 4 15 -41 1 57 0.96 70 0 0 -41 55 29 3 8 43.6 46 16 24 -42 19 34 -41 31 35 -42 26 49 -41 24 27 0.96 71 0 0 -42 18 0 3 8 46.2 45 14 25 -42 42 7 -41 54 5 -42 49 23 -41 46 56 0.96 72 0 0 -42 40 31 3 8 48.7 45 13 26 -43 4 39 -42 16 34 -43 11 55 -42 9 25 0.96 73 0 0 -43 3 1 3 8 51.2 45 11 26 -43 27 10 -42 39 2 -43 34 27 -42 31 53 0.96 74 0 0 -43 25 28 3 8 53.7 45 10 27 -43 49 39 -43 1 29 -43 56 56 -42 54 19 0.96 75 0 0 -43 47 53 3 8 56.1 44 8 27 -44 12 5 -43 23 53 -44 19 22 -43 16 43 0.96 76 0 0 -44 10 15 3 8 58.5 44 7 28 -44 34 27 -43 46 13 -44 41 45 -43 39 3 0.96 77 0 0 -44 32 33 3 9 0.9 44 5 28 -44 56 46 -44 8 30 -45 4 4 -44 1 20 0.96 78 0 0 -44 54 46 3 9 3.3 44 4 29 -45 19 0 -44 30 43 -45 26 18 -44 23 32 0.96 79 0 0 -45 16 54 3 9 5.7 43 2 29 -45 41 9 -44 52 51 -45 48 27 -44 45 40 0.96 80 0 0 -45 38 57 3 9 8.0 43 1 30 -46 3 12 -45 14 53 -46 10 31 -45 7 42 0.96 81 0 0 -46 0 53 3 9 10.3 43 360 30 -46 25 9 -45 36 49 -46 32 28 -45 29 38 0.96 82 0 0 -46 22 43 3 9 12.5 42 358 31 -46 46 59 -45 58 38 -46 54 18 -45 51 27 0.96 83 0 0 -46 44 25 3 9 14.8 42 357 31 -47 8 41 -46 20 20 -47 16 0 -46 13 9 0.96 84 0 0 -47 6 0 3 9 17.0 41 356 31 -47 30 16 -46 41 55 -47 37 35 -46 34 43 0.96 85 0 0 -47 27 26 3 9 19.1 41 354 32 -47 51 42 -47 3 21 -47 59 1 -46 56 10 0.96 86 0 0 -47 48 43 3 9 21.2 41 353 32 -48 12 59 -47 24 38 -48 20 17 -47 17 27 0.96 87 0 0 -48 9 51 3 9 23.3 40 352 32 -48 34 6 -47 45 46 -48 41 25 -47 38 35 0.96 88 0 0 -48 30 49 3 9 25.4 40 350 33 -48 55 4 -48 6 45 -49 2 22 -47 59 34 0.96 89 0 0 -48 51 36 3 9 27.4 39 349 33 -49 15 51 -48 27 33 -49 23 9 -48 20 22 0.96 90 0 0 -49 12 13 3 9 29.4 39 348 33 -49 36 27 -48 48 11 -49 43 45 -48 41 0 0.96 91 0 0 -49 32 39 3 9 31.4 38 347 34 -49 56 52 -49 8 37 -50 4 10 -49 1 27 0.96 92 0 0 -49 52 53 3 9 33.3 38 345 34 -50 17 5 -49 28 53 -50 24 23 -49 21 42 0.96 93 0 0 -50 12 56 3 9 35.2 37 344 34 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36 -57 39 36 -56 53 14 -57 46 36 -56 46 20 0.97 119 0 0 -57 29 52 3 10 12.0 23 317 36 -57 53 5 -57 6 49 -58 0 4 -56 59 56 0.97 120 0 0 -57 43 8 3 10 12.9 23 316 36 -58 6 18 -57 20 7 -58 13 16 -57 13 15 0.97 121 0 0 -57 56 7 3 10 13.9 22 315 35 -58 19 14 -57 33 10 -58 26 12 -57 26 18 0.97 122 0 0 -58 8 50 3 10 14.8 22 314 35 -58 31 54 -57 45 56 -58 38 51 -57 39 5 0.97 123 0 0 -58 21 17 3 10 15.7 21 313 35 -58 44 19 -57 58 26 -58 51 15 -57 51 36 0.97 124 0 0 -58 33 28 3 10 16.6 21 312 35 -58 56 27 -58 10 40 -59 3 22 -58 3 51 0.97 125 0 0 -58 45 23 3 10 17.4 20 311 35 -59 8 18 -58 22 37 -59 15 13 -58 15 50 0.97 126 0 0 -58 57 2 3 10 18.2 20 311 35 -59 19 54 -58 34 19 -59 26 48 -58 27 32 0.97 127 0 0 -59 8 25 3 10 19.0 19 310 35 -59 31 14 -58 45 45 -59 38 7 -58 38 59 0.97 128 0 0 -59 19 32 3 10 19.7 19 309 34 -59 42 18 -58 56 55 -59 49 10 -58 50 9 0.97 129 0 0 -59 30 23 3 10 20.5 18 308 34 -59 53 6 -59 7 48 -59 59 57 -59 1 4 0.97 130 0 0 -59 40 58 3 10 21.2 18 307 34 -60 3 39 -59 18 27 -60 10 28 -59 11 43 0.97 131 0 0 -59 51 18 3 10 21.9 17 306 34 -60 13 55 -59 28 49 -60 20 44 -59 22 6 0.97 132 0 0 -60 1 21 3 10 22.5 17 305 34 -60 23 56 -59 38 55 -60 30 44 -59 32 14 0.97 133 0 0 -60 11 10 3 10 23.2 16 304 34 -60 33 42 -59 48 46 -60 40 29 -59 42 5 0.97 134 0 0 -60 20 42 3 10 23.8 16 303 33 -60 43 12 -59 58 22 -60 49 58 -59 51 42 0.97 135 0 0 -60 30 0 3 10 24.4 15 302 33 -60 52 26 -60 7 42 -60 59 12 -60 1 3 0.97 136 0 0 -60 39 2 3 10 24.9 15 301 33 -61 1 26 -60 16 47 -61 8 10 -60 10 8 0.97 137 0 0 -60 47 49 3 10 25.5 14 300 33 -61 10 10 -60 25 36 -61 16 54 -60 18 58 0.97 138 0 0 -60 56 20 3 10 26.0 14 300 33 -61 18 39 -60 34 10 -61 25 22 -60 27 33 0.97 139 0 0 -61 4 37 3 10 26.5 13 299 32 -61 26 53 -60 42 29 -61 33 35 -60 35 53 0.97 140 0 0 -61 12 38 3 10 27.0 13 298 32 -61 34 52 -60 50 34 -61 41 33 -60 43 58 0.97 141 0 0 -61 20 25 3 10 27.4 12 297 32 -61 42 36 -60 58 23 -61 49 17 -60 51 48 0.97 142 0 0 -61 27 57 3 10 27.9 12 296 32 -61 50 5 -61 5 57 -61 56 45 -60 59 23 0.97 143 0 0 -61 35 14 3 10 28.3 11 295 31 -61 57 20 -61 13 16 -62 3 59 -61 6 43 0.97 144 0 0 -61 42 17 3 10 28.7 11 294 31 -62 4 20 -61 20 21 -62 10 59 -61 13 48 0.97 145 0 0 -61 49 5 3 10 29.1 10 293 31 -62 11 6 -61 27 12 -62 17 44 -61 20 39 0.97 146 0 0 -61 55 38 3 10 29.4 10 292 31 -62 17 37 -61 33 47 -62 24 15 -61 27 16 0.98 147 0 0 -62 1 57 3 10 29.8 9 291 30 -62 23 54 -61 40 9 -62 30 31 -61 33 38 0.98 148 0 0 -62 8 2 3 10 30.1 9 291 30 -62 29 57 -61 46 16 -62 36 33 -61 39 45 0.98 149 0 0 -62 13 53 3 10 30.4 8 290 30 -62 35 46 -61 52 8 -62 42 21 -61 45 39 0.98 150 0 0 -62 19 30 3 10 30.7 8 289 30 -62 41 21 -61 57 47 -62 47 55 -61 51 18 0.98 151 0 0 -62 24 52 3 10 31.0 7 288 29 -62 46 41 -62 3 11 -62 53 16 -61 56 43 0.98 152 0 0 -62 30 1 3 10 31.2 7 287 29 -62 51 48 -62 8 22 -62 58 22 -62 1 53 0.98 153 0 0 -62 34 56 3 10 31.4 7 286 29 -62 56 41 -62 13 18 -63 3 14 -62 6 50 0.99 154 0 0 -62 39 36 3 10 31.7 6 285 28 -63 1 20 -62 18 1 -63 7 53 -62 11 33 0.99 155 0 0 -62 44 4 3 10 31.9 6 284 28 -63 5 46 -62 22 29 -63 12 18 -62 16 3 0.99 156 0 0 -62 48 17 3 10 32.1 5 283 28 -63 9 58 -62 26 44 -63 16 29 -62 20 18 0.99 157 0 0 -62 52 17 3 10 32.2 5 283 28 -63 13 56 -62 30 45 -63 20 27 -62 24 20 1.00 158 0 0 -62 56 3 3 10 32.4 4 282 27 -63 17 41 -62 34 33 -63 24 12 -62 28 8 1.00 159 0 0 -62 59 36 3 10 32.5 4 281 27 -63 21 13 -62 38 7 -63 27 43 -62 31 42 1.01 160 0 0 -63 2 55 3 10 32.6 3 280 27 -63 24 31 -62 41 28 -63 31 1 -62 35 3 1.01 161 0 0 -63 6 1 3 10 32.7 3 279 26 -63 27 36 -62 44 35 -63 34 5 -62 38 11 1.02 162 0 0 -63 8 54 3 10 32.8 2 278 26 -63 30 27 -62 47 29 -63 36 57 -62 41 5 1.04 163 0 0 -63 11 33 3 10 32.9 2 277 26 -63 33 6 -62 50 9 -63 39 35 -62 43 45 1.05 164 0 0 -63 14 0 3 10 33.0 2 276 25 -63 35 31 -62 52 36 -63 42 0 -62 46 12 1.08 165 0 0 -63 16 12 3 10 33.0 1 275 25 -63 37 43 -62 54 50 -63 44 12 -62 48 26 1.14 166 0 0 -63 18 12 3 10 33.0 1 275 25 -63 39 42 -62 56 50 -63 46 10 -62 50 27 1.28 167 0 0 -63 19 59 3 10 33.0 0 274 25 -63 41 28 -62 58 37 -63 47 56 -62 52 15 2.26 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 227-01639-1 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 16 00.8038 DE: +01 37 24.401 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 16 00.8039 DE: +01 37 24.401 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.3 * B mag [mag]: 10.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1628) Strobel asteroid class: approx. diameter [km]: 57 approx. diameter ["]: 0.023 distance from Earth [AU]: 3.37600 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.013", 0.001", 95.492° remarks: * orbital elements for (1628)Strobel : Mean anomaly = 13.1086764596 deg Arg. of pericenter = 287.5270292066 deg Long. of node = 181.0787553958 deg Inclination = 19.3638042440 deg Eccentricity = 0.0621884295 Semimajor axis = 3.0134731013 AU Perihelion dist = 2.8260699418 AU Mag: H = 10.27, G = 0.15 Epoch of elements : MJD 60585.13086921 TDT (2024 Oct 02.1309) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr27,1.57,2024,10,2,3.140864,-0.228613,-0.652708,19.378765,-6.795444,-0.004372,0.000474,-0.000001,0.000001 80.8722,1.5233,130.21,-3.73,False TYC 227-01639-1,9.26688991,1.6234448,10.56,10.30,10.16,0.0,0,,9.28794391,1.5232693,5.73,5.42,0,0,0 1628,Strobel,16.03,57.102,3.3760,0,0,3.367,-17.70,,2.6,0 0,13.0840,2024,10,2,287.5270,181.0788,19.3638,0.06219,3.01347,2.82607,10.27,5.0,0.15 1.150,0.0133,0.0015,95,0.0035,Known errors,0.77,0,-1,-1 20241002_1639-1,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org