IOTA/IOTA-ES occultation update for (1663) van / HIP 39422 event on 2024 Oct 04, 00:59 UT Visible from Summary ------- On 2024 Oct 04 UT, the 11.1514061381111 km diameter asteroid (1663) van will occult a 11.3 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 5.29 mag to 16.58 mag (the magnitude of the asteroid) for at most 0.450 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: 98 * date and approx. time of event: 2024 Oct 04, 00:56 - 2024 Oct 04, 01:01 * geocentric midpoint of event [JD]: 2460587.54106671 * magnitude of target star: 11.30 * magnitude drop [mag]: 5.29 * estimated maximum duration [s]: 0.450 * Moon: 1 % sunlit, 86° distance * Sun: 72° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 98°) * approx speed of asteroid's shadow [km/s]: 24.9566 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 39422 by 1663 van on 2024 Oct 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 25 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -42 58 5 .. .. .. -42 53 55 .... 26 0 0 -42 39 3 0 56 38.7 1 60 -29 -42 44 59 -42 33 8 -42 49 11 -42 28 58 .... 27 0 0 -42 14 23 0 56 38.9 2 59 -29 -42 20 18 -42 8 29 -42 24 28 -42 4 21 0.87 28 0 0 -41 50 2 0 56 39.1 3 58 -28 -41 55 56 -41 44 10 -42 0 5 -41 40 3 1.03 29 0 0 -41 26 3 0 56 39.4 3 58 -28 -41 31 54 -41 20 12 -41 36 2 -41 16 6 1.12 30 0 0 -41 2 24 0 56 39.8 4 57 -28 -41 8 14 -40 56 35 -41 12 21 -40 52 30 1.17 31 0 0 -40 39 7 0 56 40.3 5 56 -27 -40 44 56 -40 33 20 -40 49 1 -40 29 16 1.20 32 0 0 -40 16 13 0 56 40.9 6 56 -27 -40 22 0 -40 10 27 -40 26 5 -40 6 24 1.22 33 0 0 -39 53 43 0 56 41.6 7 55 -26 -39 59 28 -39 47 58 -40 3 32 -39 43 56 1.24 34 0 0 -39 31 36 0 56 42.5 8 54 -26 -39 37 20 -39 25 53 -39 41 23 -39 21 52 1.25 35 0 0 -39 9 54 0 56 43.3 8 54 -25 -39 15 37 -39 4 13 -39 19 38 -39 0 13 1.27 36 0 0 -38 48 38 0 56 44.3 9 53 -25 -38 54 19 -38 42 58 -38 58 19 -38 38 59 1.28 37 0 0 -38 27 47 0 56 45.4 10 52 -24 -38 33 27 -38 22 8 -38 37 26 -38 18 10 1.28 38 0 0 -38 7 23 0 56 46.6 11 52 -24 -38 13 1 -38 1 45 -38 16 59 -37 57 48 1.29 39 0 0 -37 47 25 0 56 47.9 12 51 -23 -37 53 2 -37 41 49 -37 57 0 -37 37 53 1.30 40 0 0 -37 27 55 0 56 49.3 13 50 -23 -37 33 31 -37 22 21 -37 37 28 -37 18 25 1.30 41 0 0 -37 8 54 0 56 50.7 13 50 -22 -37 14 28 -37 3 20 -37 18 24 -36 59 26 1.31 42 0 0 -36 50 20 0 56 52.3 14 49 -21 -36 55 53 -36 44 48 -36 59 48 -36 40 55 1.31 43 0 0 -36 32 16 0 56 53.9 15 48 -21 -36 37 48 -36 26 45 -36 41 42 -36 22 52 1.31 44 0 0 -36 14 41 0 56 55.6 16 48 -20 -36 20 11 -36 9 11 -36 24 5 -36 5 19 1.32 45 0 0 -35 57 36 0 56 57.5 17 47 -19 -36 3 5 -35 52 7 -36 6 58 -35 48 16 1.32 46 0 0 -35 41 1 0 56 59.4 17 46 -19 -35 46 29 -35 35 33 -35 50 21 -35 31 43 1.32 47 0 0 -35 24 57 0 57 1.4 18 46 -18 -35 30 24 -35 19 30 -35 34 15 -35 15 41 1.33 48 0 0 -35 9 23 0 57 3.4 19 45 -17 -35 14 50 -35 3 58 -35 18 40 -35 0 9 1.33 49 0 0 -34 54 22 0 57 5.6 20 44 -17 -34 59 47 -34 48 57 -35 3 36 -34 45 9 1.33 50 0 0 -34 39 51 0 57 7.8 20 44 -16 -34 45 16 -34 34 28 -34 49 4 -34 30 40 1.33 51 0 0 -34 25 53 0 57 10.2 21 43 -15 -34 31 17 -34 20 30 -34 35 5 -34 16 44 1.33 52 0 0 -34 12 27 0 57 12.5 22 42 -15 -34 17 50 -34 7 6 -34 21 37 -34 3 19 1.34 53 0 0 -33 59 34 0 57 15.0 23 41 -14 -34 4 56 -33 54 13 -34 8 43 -33 50 28 1.34 54 0 0 -33 47 14 0 57 17.6 23 40 -13 -33 52 35 -33 41 54 -33 56 21 -33 38 9 1.34 55 0 0 -33 35 27 0 57 20.2 24 40 -12 -33 40 47 -33 30 7 -33 44 32 -33 26 23 1.34 56 0 0 -33 24 13 0 57 22.9 25 39 -11 -33 29 32 -33 18 54 -33 33 17 -33 15 10 1.34 57 0 0 -33 13 33 0 57 25.7 25 38 -11 -33 18 51 -33 8 15 -33 22 36 -33 4 31 1.34 58 0 0 -33 3 26 0 57 28.5 26 37 -10 -33 8 44 -32 58 9 -33 12 28 -32 54 26 1.35 59 0 0 -32 53 54 0 57 31.4 27 36 -9 -32 59 11 -32 48 37 -33 2 55 -32 44 55 1.35 60 0 0 -32 44 56 0 57 34.4 27 36 -8 -32 50 13 -32 39 40 -32 53 56 -32 35 58 1.35 61 0 0 -32 36 32 0 57 37.4 28 35 -7 -32 41 49 -32 31 17 -32 45 32 -32 27 35 1.35 62 0 0 -32 28 43 0 57 40.5 28 34 -7 -32 33 59 -32 23 28 -32 37 42 -32 19 47 1.35 63 0 0 -32 21 29 0 57 43.6 29 33 -6 -32 26 44 -32 16 14 -32 30 26 -32 12 33 1.35 64 0 0 -32 14 49 0 57 46.8 30 32 -5 -32 20 4 -32 9 35 -32 23 46 -32 5 55 1.35 65 0 0 -32 8 45 0 57 50.1 30 31 -4 -32 13 59 -32 3 31 -32 17 41 -31 59 51 1.35 66 0 0 -32 3 16 0 57 53.4 31 30 -3 -32 8 30 -31 58 2 -32 12 11 -31 54 22 1.36 67 0 0 -31 58 21 0 57 56.7 31 29 -2 -32 3 35 -31 53 8 -32 7 16 -31 49 28 1.36 68 0 0 -31 54 3 0 58 0.1 32 28 -2 -31 59 16 -31 48 50 -32 2 57 -31 45 10 1.36 69 0 0 -31 50 19 0 58 3.6 32 27 -1 -31 55 32 -31 45 7 -31 59 13 -31 41 27 1.36 70 0 0 -31 47 11 0 58 7.1 33 26 0 -31 52 24 -31 41 59 -31 56 5 -31 38 19 1.36 71 0 0 -31 44 39 0 58 10.6 33 25 1 -31 49 52 -31 39 27 -31 53 32 -31 35 47 1.36 72 0 0 -31 42 42 0 58 14.2 33 24 2 -31 47 55 -31 37 30 -31 51 35 -31 33 51 1.36 73 0 0 -31 41 21 0 58 17.8 34 23 3 -31 46 34 -31 36 9 -31 50 14 -31 32 30 1.36 74 0 0 -31 40 36 0 58 21.4 34 22 4 -31 45 48 -31 35 24 -31 49 29 -31 31 45 1.36 75 0 0 -31 40 26 0 58 25.1 34 21 4 -31 45 39 -31 35 14 -31 49 19 -31 31 35 1.36 76 0 0 -31 40 52 0 58 28.8 35 20 5 -31 46 5 -31 35 40 -31 49 45 -31 32 1 1.36 77 0 0 -31 41 54 0 58 32.5 35 19 6 -31 47 7 -31 36 42 -31 50 47 -31 33 3 1.36 78 0 0 -31 43 32 0 58 36.3 35 18 7 -31 48 45 -31 38 19 -31 52 25 -31 34 40 1.36 79 0 0 -31 45 45 0 58 40.1 35 16 8 -31 50 58 -31 40 32 -31 54 39 -31 36 53 1.36 80 0 0 -31 48 34 0 58 43.9 36 15 9 -31 53 47 -31 43 21 -31 57 28 -31 39 42 1.37 81 0 0 -31 51 59 0 58 47.7 36 14 10 -31 57 12 -31 46 46 -32 0 53 -31 43 6 1.37 82 0 0 -31 55 59 0 58 51.5 36 13 10 -32 1 13 -31 50 46 -32 4 54 -31 47 6 1.37 83 0 0 -32 0 35 0 58 55.4 36 12 11 -32 5 49 -31 55 21 -32 9 30 -31 51 41 1.37 84 0 0 -32 5 46 0 58 59.2 36 11 12 -32 11 1 -32 0 32 -32 14 42 -31 56 52 1.37 85 0 0 -32 11 33 0 59 3.1 36 10 13 -32 16 48 -32 6 19 -32 20 30 -32 2 38 1.37 86 0 0 -32 17 55 0 59 6.9 36 8 14 -32 23 10 -32 12 40 -32 26 53 -32 8 59 1.37 87 0 0 -32 24 52 0 59 10.8 36 7 15 -32 30 8 -32 19 37 -32 33 51 -32 15 56 1.37 88 0 0 -32 32 25 0 59 14.7 36 6 16 -32 37 41 -32 27 9 -32 41 24 -32 23 27 1.37 89 0 0 -32 40 32 0 59 18.5 36 5 16 -32 45 49 -32 35 16 -32 49 32 -32 31 34 1.37 90 0 0 -32 49 14 0 59 22.4 36 4 17 -32 54 32 -32 43 58 -32 58 16 -32 40 15 1.37 91 0 0 -32 58 31 0 59 26.2 36 2 18 -33 3 49 -32 53 14 -33 7 34 -32 49 31 1.37 92 0 0 -33 8 23 0 59 30.1 36 1 19 -33 13 42 -33 3 5 -33 17 26 -32 59 21 1.37 93 0 0 -33 18 49 0 59 33.9 36 0 20 -33 24 8 -33 13 30 -33 27 54 -33 9 46 1.37 94 0 0 -33 29 49 0 59 37.7 35 359 21 -33 35 9 -33 24 29 -33 38 55 -33 20 45 1.37 95 0 0 -33 41 23 0 59 41.5 35 358 21 -33 46 44 -33 36 2 -33 50 30 -33 32 17 1.37 96 0 0 -33 53 31 0 59 45.3 35 357 22 -33 58 52 -33 48 9 -34 2 39 -33 44 24 1.37 97 0 0 -34 6 12 0 59 49.0 35 356 23 -34 11 34 -34 0 50 -34 15 22 -33 57 3 1.37 98 0 0 -34 19 26 0 59 52.8 34 354 24 -34 24 50 -34 14 3 -34 28 38 -34 10 16 1.37 99 0 0 -34 33 14 0 59 56.5 34 353 24 -34 38 38 -34 27 50 -34 42 27 -34 24 2 1.37 100 0 0 -34 47 34 1 0 0.1 34 352 25 -34 52 59 -34 42 9 -34 56 49 -34 38 21 1.37 101 0 0 -35 2 26 1 0 3.8 33 351 26 -35 7 53 -34 57 0 -35 11 43 -34 53 12 1.37 102 0 0 -35 17 51 1 0 7.3 33 350 27 -35 23 19 -35 12 24 -35 27 10 -35 8 34 1.37 103 0 0 -35 33 47 1 0 10.9 33 349 27 -35 39 16 -35 28 19 -35 43 8 -35 24 29 1.37 104 0 0 -35 50 15 1 0 14.4 32 348 28 -35 55 45 -35 44 46 -35 59 37 -35 40 55 1.37 105 0 0 -36 7 14 1 0 17.9 32 347 29 -36 12 45 -36 1 43 -36 16 38 -35 57 52 1.37 106 0 0 -36 24 43 1 0 21.3 31 346 30 -36 30 15 -36 19 12 -36 34 9 -36 15 19 1.37 107 0 0 -36 42 42 1 0 24.7 31 345 30 -36 48 16 -36 37 10 -36 52 11 -36 33 16 1.37 108 0 0 -37 1 12 1 0 28.0 30 344 31 -37 6 46 -36 55 38 -37 10 42 -36 51 43 1.37 109 0 0 -37 20 10 1 0 31.3 30 343 32 -37 25 46 -37 14 35 -37 29 43 -37 10 40 1.37 110 0 0 -37 39 37 1 0 34.5 29 342 32 -37 45 15 -37 34 1 -37 49 13 -37 30 5 1.37 111 0 0 -37 59 33 1 0 37.6 29 341 33 -38 5 12 -37 53 55 -38 9 11 -37 49 58 1.37 112 0 0 -38 19 56 1 0 40.7 28 340 33 -38 25 36 -38 14 17 -38 29 36 -38 10 19 1.37 113 0 0 -38 40 47 1 0 43.8 27 339 34 -38 46 29 -38 35 6 -38 50 29 -38 31 7 1.37 114 0 0 -39 2 4 1 0 46.7 27 338 35 -39 7 47 -38 56 22 -39 11 49 -38 52 22 1.37 115 0 0 -39 23 48 1 0 49.6 26 337 35 -39 29 32 -39 18 4 -39 33 35 -39 14 3 1.37 116 0 0 -39 45 56 1 0 52.5 25 336 36 -39 51 42 -39 40 11 -39 55 46 -39 36 9 1.37 117 0 0 -40 8 30 1 0 55.2 25 335 36 -40 14 17 -40 2 44 -40 18 22 -39 58 40 1.37 118 0 0 -40 31 28 1 0 57.9 24 334 37 -40 37 17 -40 25 40 -40 41 23 -40 21 35 1.37 119 0 0 -40 54 49 1 1 0.5 23 333 37 -41 0 39 -40 48 59 -41 4 47 -40 44 54 1.37 120 0 0 -41 18 33 1 1 3.1 23 332 38 -41 24 25 -41 12 42 -41 28 33 -41 8 35 1.37 121 0 0 -41 42 39 1 1 5.5 22 332 38 -41 48 32 -41 36 46 -41 52 42 -41 32 38 1.37 122 0 0 -42 7 6 1 1 7.9 21 331 38 -42 13 1 -42 1 12 -42 17 12 -41 57 3 1.37 123 0 0 -42 31 54 1 1 10.2 21 330 39 -42 37 51 -42 25 58 -42 42 2 -42 21 48 1.37 124 0 0 -42 57 1 1 1 12.4 20 329 39 -43 2 59 -42 51 3 -43 7 12 -42 46 52 1.38 125 0 0 -43 22 27 1 1 14.5 19 328 39 -43 28 27 -43 16 28 -43 32 41 -43 12 15 1.38 126 0 0 -43 48 11 1 1 16.6 18 327 40 -43 54 13 -43 42 10 -43 58 28 -43 37 56 1.38 127 0 0 -44 14 12 1 1 18.5 18 327 40 -44 20 16 -44 8 9 -44 24 32 -44 3 55 1.38 128 0 0 -44 40 29 1 1 20.4 17 326 40 -44 46 35 -44 34 25 -44 50 52 -44 30 9 1.38 129 0 0 -45 7 2 1 1 22.2 16 325 40 -45 13 9 -45 0 56 -45 17 28 -44 56 39 1.38 130 0 0 -45 33 48 1 1 23.9 15 324 41 -45 39 57 -45 27 41 -45 44 17 -45 23 23 1.38 131 0 0 -46 0 49 1 1 25.5 14 323 41 -46 6 59 -45 54 39 -46 11 20 -45 50 20 1.38 132 0 0 -46 28 1 1 1 27.0 14 322 41 -46 34 13 -46 21 50 -46 38 36 -46 17 30 1.38 133 0 0 -46 55 25 1 1 28.5 13 322 41 -47 1 39 -46 49 12 -47 6 3 -46 44 51 1.38 134 0 0 -47 22 59 1 1 29.8 12 321 41 -47 29 15 -47 16 45 -47 33 40 -47 12 22 1.38 135 0 0 -47 50 43 1 1 31.0 11 320 41 -47 57 0 -47 44 27 -48 1 26 -47 40 3 1.38 136 0 0 -48 18 35 1 1 32.2 11 319 41 -48 24 53 -48 12 17 -48 29 21 -48 7 52 1.39 137 0 0 -48 46 34 1 1 33.3 10 319 41 -48 52 54 -48 40 14 -48 57 22 -48 35 48 1.39 138 0 0 -49 14 39 1 1 34.3 9 318 41 -49 21 1 -49 8 18 -49 25 30 -49 3 51 1.39 139 0 0 -49 42 49 1 1 35.2 8 317 41 -49 49 13 -49 36 27 -49 53 43 -49 31 58 1.39 140 0 0 -50 11 3 1 1 36.0 7 316 41 -50 17 29 -50 4 39 -50 22 0 -50 0 10 1.40 141 0 0 -50 39 21 1 1 36.7 7 315 41 -50 45 47 -50 32 55 -50 50 20 -50 28 24 1.40 142 0 0 -51 7 40 1 1 37.3 6 315 41 -51 14 8 -51 1 13 -51 18 42 -50 56 41 1.40 143 0 0 -51 35 59 1 1 37.9 5 314 40 -51 42 29 -51 29 31 -51 47 4 -51 24 58 1.41 144 0 0 -52 4 18 1 1 38.3 4 313 40 -52 10 50 -51 57 49 -52 15 26 -51 53 15 1.42 145 0 0 -52 32 36 1 1 38.7 3 312 40 -52 39 9 -52 26 5 -52 43 46 -52 21 31 1.43 146 0 0 -53 0 52 1 1 39.0 3 311 40 -53 7 25 -52 54 19 -53 12 3 -52 49 44 1.45 147 0 0 -53 29 3 1 1 39.2 2 311 40 -53 35 38 -53 22 30 -53 40 17 -53 17 53 1.48 148 0 0 -53 57 10 1 1 39.4 1 310 39 -54 3 47 -53 50 35 -54 8 26 -53 45 58 1.56 149 0 0 -54 25 11 1 1 39.5 0 309 39 -54 31 49 -54 18 35 -54 36 29 -54 13 57 1.89 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: HIP 39422 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 03 30.5682 DE: +21 18 06.010 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 03 30.5695 DE: +21 18 06.006 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.300) * V mag [mag]: 11.3 * B mag [mag]: 12.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1663) van asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.28320 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#45 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): 0.009", 0.002", 97.597° remarks: * orbital elements for (1663)van : Mean anomaly = 73.7994929506 deg Arg. of pericenter = 275.2407031993 deg Long. of node = 83.1695405787 deg Inclination = 5.3614435350 deg Eccentricity = 0.1802094847 Semimajor axis = 2.2399866235 AU Perihelion dist = 1.8363197884 AU Mag: H = 11.90, G = 0.15 Epoch of elements : MJD 60587.04106679 TDT (2024 Oct 04.0411) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#452023Apr24,0.45,2024,10,4,0.985601,-0.101915,-0.799754,13.982160,-1.709041,-0.005110,0.001104,-0.000001,0.000000 93.2378,21.2333,162.39,-4.47,False HIP 39422,8.05849113,21.3016696,12.15,11.30,10.84,0.1,0,,8.08256996,21.2332642,5.29,5.30,0,0,0 1663,van,16.58,11.317,2.2832,0,0,3.852,-6.59,,0.8,0 0,73.4934,2024,10,3,275.2407,83.1695,5.3614,0.18021,2.23999,1.83632,11.90,5.0,0.15 1.352,0.0087,0.0024,98,0.0024,Known errors,2.26,0,-1,-1 20241004__39422,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org