IOTA/IOTA-ES occultation update for (16834) 1997 WU22 / TYC 1378-01350-1 event on 2024 Oct 30, 08:00 UT Visible from Summary ------- On 2024 Oct 30 UT, the 2.327 km diameter asteroid (16834) 1997 WU22 will occult a 10.4 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 8.99 mag to 19.36 mag (the magnitude of the asteroid) for at most 0.140 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: 28 * date and approx. time of event: 2024 Oct 30, 07:54 - 2024 Oct 30, 08:07 * geocentric midpoint of event [JD]: 2460613.83394179 * magnitude of target star: 10.37 * magnitude drop [mag]: 8.99 * estimated maximum duration [s]: 0.140 * Moon: 4 % sunlit, 71° distance * Sun: 94° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 2 * 1 sigma uncertainty interval [path widths]: +/- 2.37 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.004", 101°) * approx speed of asteroid's shadow [km/s]: 16.4751 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1378-01350-1 by 16834 1997 WU22 on 2024 Oct 30 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 -134 0 0 34 29 53 7 54 26.0 1 71 -67 34 29 13 34 30 33 34 26 6 34 33 39 .... -133 0 0 34 47 5 7 54 26.1 1 71 -67 34 46 25 34 47 45 34 43 19 34 50 51 -0.09 -132 0 0 35 3 42 7 54 26.3 2 72 -67 35 3 2 35 4 21 34 59 56 35 7 27 -0.07 -131 0 0 35 19 44 7 54 26.6 3 72 -67 35 19 4 35 20 24 35 16 0 35 23 29 -0.06 -130 0 0 35 35 12 7 54 27.0 4 73 -67 35 34 33 35 35 52 35 31 28 35 38 56 -0.05 -129 0 0 35 50 6 7 54 27.5 5 74 -67 35 49 27 35 50 46 35 46 23 35 53 49 -0.05 -128 0 0 36 4 26 7 54 28.0 6 74 -67 36 3 47 36 5 6 36 0 44 36 8 9 -0.04 -127 0 0 36 18 13 7 54 28.6 7 75 -67 36 17 34 36 18 52 36 14 31 36 21 55 -0.04 -126 0 0 36 31 26 7 54 29.3 7 75 -67 36 30 47 36 32 5 36 27 45 36 35 7 -0.04 -125 0 0 36 44 6 7 54 30.1 8 76 -67 36 43 27 36 44 45 36 40 25 36 47 47 -0.04 -124 0 0 36 56 13 7 54 30.9 9 76 -67 36 55 34 36 56 52 36 52 33 36 59 53 -0.04 -123 0 0 37 7 47 7 54 31.9 10 77 -67 37 7 8 37 8 26 37 4 7 37 11 26 -0.04 -122 0 0 37 18 48 7 54 32.9 11 78 -67 37 18 10 37 19 27 37 15 9 37 22 27 -0.03 -121 0 0 37 29 17 7 54 33.9 12 78 -66 37 28 39 37 29 56 37 25 39 37 32 56 -0.03 -120 0 0 37 39 14 7 54 35.1 12 79 -66 37 38 36 37 39 53 37 35 36 37 42 52 -0.03 -119 0 0 37 48 39 7 54 36.3 13 80 -66 37 48 1 37 49 18 37 45 2 37 52 17 -0.03 -118 0 0 37 57 32 7 54 37.6 14 80 -66 37 56 54 37 58 11 37 53 55 38 1 10 -0.03 -117 0 0 38 5 54 7 54 38.9 15 81 -65 38 5 16 38 6 32 38 2 17 38 9 31 -0.03 -116 0 0 38 13 44 7 54 40.4 16 81 -65 38 13 5 38 14 22 38 10 7 38 17 20 -0.03 -115 0 0 38 21 2 7 54 41.8 16 82 -65 38 20 24 38 21 40 38 17 26 38 24 38 -0.03 -114 0 0 38 27 49 7 54 43.4 17 83 -64 38 27 11 38 28 28 38 24 14 38 31 25 -0.03 -113 0 0 38 34 6 7 54 45.0 18 83 -64 38 33 28 38 34 44 38 30 30 38 37 41 -0.03 -112 0 0 38 39 51 7 54 46.7 19 84 -64 38 39 13 38 40 29 38 36 16 38 43 26 -0.03 -111 0 0 38 45 5 7 54 48.5 20 84 -63 38 44 27 38 45 43 38 41 30 38 48 40 -0.03 -110 0 0 38 49 49 7 54 50.3 20 85 -63 38 49 11 38 50 27 38 46 14 38 53 23 -0.03 -109 0 0 38 54 2 7 54 52.2 21 86 -62 38 53 24 38 54 39 38 50 27 38 57 36 -0.03 -108 0 0 38 57 44 7 54 54.2 22 86 -62 38 57 6 38 58 22 38 54 10 39 1 18 -0.03 -107 0 0 39 0 55 7 54 56.2 23 87 -61 39 0 18 39 1 33 38 57 21 39 4 29 -0.03 -106 0 0 39 3 37 7 54 58.3 24 88 -61 39 2 59 39 4 14 39 0 3 39 7 10 -0.03 -105 0 0 39 5 47 7 55 0.4 24 88 -60 39 5 9 39 6 25 39 2 13 39 9 21 -0.03 -104 0 0 39 7 27 7 55 2.6 25 89 -60 39 6 50 39 8 5 39 3 54 39 11 1 -0.03 -103 0 0 39 8 37 7 55 4.9 26 90 -59 39 7 59 39 9 15 39 5 3 39 12 11 -0.02 -102 0 0 39 9 16 7 55 7.3 27 90 -59 39 8 39 39 9 54 39 5 43 39 12 50 -0.02 -101 0 0 39 9 25 7 55 9.7 27 91 -58 39 8 48 39 10 3 39 5 52 39 12 59 -0.02 -100 0 0 39 9 4 7 55 12.2 28 91 -58 39 8 26 39 9 42 39 5 30 39 12 37 -0.02 - 99 0 0 39 8 12 7 55 14.7 29 92 -57 39 7 34 39 8 50 39 4 38 39 11 45 -0.02 - 98 0 0 39 6 49 7 55 17.3 30 93 -57 39 6 11 39 7 27 39 3 15 39 10 23 -0.02 - 97 0 0 39 4 56 7 55 20.0 31 93 -56 39 4 18 39 5 34 39 1 22 39 8 30 -0.02 - 96 0 0 39 2 32 7 55 22.7 31 94 -56 39 1 54 39 3 10 38 58 58 39 6 6 -0.02 - 95 0 0 38 59 38 7 55 25.5 32 95 -55 38 59 0 39 0 15 38 56 3 39 3 12 -0.02 - 94 0 0 38 56 12 7 55 28.4 33 95 -54 38 55 34 38 56 50 38 52 38 38 59 46 -0.02 - 93 0 0 38 52 16 7 55 31.4 34 96 -54 38 51 38 38 52 54 38 48 41 38 55 50 -0.02 - 92 0 0 38 47 48 7 55 34.4 35 97 -53 38 47 10 38 48 26 38 44 14 38 51 23 -0.02 - 91 0 0 38 42 50 7 55 37.4 35 97 -52 38 42 12 38 43 28 38 39 15 38 46 24 -0.02 - 90 0 0 38 37 20 7 55 40.6 36 98 -52 38 36 41 38 37 58 38 33 44 38 40 55 -0.02 - 89 0 0 38 31 18 7 55 43.8 37 99 -51 38 30 40 38 31 56 38 27 42 38 34 53 -0.02 - 88 0 0 38 24 45 7 55 47.1 38 99 -51 38 24 7 38 25 23 38 21 9 38 28 21 -0.02 - 87 0 0 38 17 40 7 55 50.5 39 100 -50 38 17 2 38 18 18 38 14 4 38 21 16 -0.02 - 86 0 0 38 10 3 7 55 53.9 39 100 -49 38 9 24 38 10 41 38 6 26 38 13 39 -0.02 - 85 0 0 38 1 53 7 55 57.4 40 101 -49 38 1 15 38 2 32 37 58 16 38 5 30 -0.02 - 84 0 0 37 53 11 7 56 1.0 41 102 -48 37 52 33 37 53 50 37 49 34 37 56 49 -0.02 - 83 0 0 37 43 57 7 56 4.6 42 102 -47 37 43 18 37 44 35 37 40 19 37 47 35 -0.02 - 82 0 0 37 34 9 7 56 8.3 43 103 -47 37 33 31 37 34 48 37 30 31 37 37 48 -0.02 - 81 0 0 37 23 49 7 56 12.2 43 104 -46 37 23 10 37 24 27 37 20 10 37 27 28 -0.02 - 80 0 0 37 12 55 7 56 16.0 44 104 -45 37 12 16 37 13 33 37 9 15 37 16 34 -0.02 - 79 0 0 37 1 27 7 56 20.0 45 105 -45 37 0 48 37 2 6 36 57 47 37 5 7 -0.02 - 78 0 0 36 49 25 7 56 24.0 46 106 -44 36 48 46 36 50 4 36 45 45 36 53 6 -0.02 - 77 0 0 36 36 49 7 56 28.2 47 106 -43 36 36 10 36 37 28 36 33 8 36 40 30 -0.02 - 76 0 0 36 23 38 7 56 32.4 48 107 -42 36 22 59 36 24 18 36 19 57 36 27 20 -0.02 - 75 0 0 36 9 53 7 56 36.6 48 107 -42 36 9 14 36 10 32 36 6 10 36 13 35 -0.02 - 74 0 0 35 55 32 7 56 41.0 49 108 -41 35 54 53 35 56 12 35 51 49 35 59 15 -0.02 - 73 0 0 35 40 36 7 56 45.5 50 109 -40 35 39 56 35 41 16 35 36 52 35 44 20 -0.02 - 72 0 0 35 25 4 7 56 50.0 51 109 -39 35 24 24 35 25 44 35 21 19 35 28 48 -0.02 - 71 0 0 35 8 56 7 56 54.6 52 110 -39 35 8 16 35 9 35 35 5 10 35 12 41 -0.02 - 70 0 0 34 52 11 7 56 59.4 53 110 -38 34 51 31 34 52 51 34 48 25 34 55 57 -0.02 - 69 0 0 34 34 49 7 57 4.2 54 111 -37 34 34 9 34 35 29 34 31 2 34 38 36 -0.02 - 68 0 0 34 16 51 7 57 9.1 55 112 -36 34 16 10 34 17 31 34 13 3 34 20 38 -0.02 - 67 0 0 33 58 14 7 57 14.0 55 112 -35 33 57 34 33 58 55 33 54 26 34 2 3 -0.02 - 66 0 0 33 39 0 7 57 19.1 56 113 -35 33 38 20 33 39 41 33 35 11 33 42 50 -0.02 - 65 0 0 33 19 8 7 57 24.3 57 114 -34 33 18 27 33 19 49 33 15 17 33 22 58 -0.02 - 64 0 0 32 58 37 7 57 29.6 58 114 -33 32 57 56 32 59 18 32 54 46 33 2 28 -0.02 - 63 0 0 32 37 27 7 57 34.9 59 115 -32 32 36 46 32 38 8 32 33 35 32 41 19 -0.02 - 62 0 0 32 15 38 7 57 40.4 60 115 -31 32 14 57 32 16 19 32 11 45 32 19 31 -0.02 - 61 0 0 31 53 9 7 57 46.0 61 116 -30 31 52 28 31 53 51 31 49 15 31 57 4 -0.02 - 60 0 0 31 30 1 7 57 51.6 62 117 -30 31 29 19 31 30 43 31 26 6 31 33 56 -0.02 - 59 0 0 31 6 12 7 57 57.4 63 117 -29 31 5 31 31 6 54 31 2 16 31 10 9 -0.02 - 58 0 0 30 41 43 7 58 3.2 64 118 -28 30 41 1 30 42 25 30 37 46 30 45 40 -0.02 - 57 0 0 30 16 34 7 58 9.2 65 118 -27 30 15 51 30 17 16 30 12 35 30 20 32 -0.02 - 56 0 0 29 50 43 7 58 15.3 66 119 -26 29 50 0 29 51 25 29 46 43 29 54 42 -0.02 - 55 0 0 29 24 11 7 58 21.4 67 120 -25 29 23 28 29 24 53 29 20 10 29 28 11 -0.02 - 54 0 0 28 56 57 7 58 27.7 68 120 -24 28 56 14 28 57 40 28 52 56 29 0 59 -0.02 - 53 0 0 28 29 2 7 58 34.0 69 121 -23 28 28 19 28 29 45 28 25 0 28 33 4 -0.02 - 52 0 0 28 0 25 7 58 40.5 70 122 -22 27 59 42 28 1 8 27 56 21 28 4 29 -0.02 - 51 0 0 27 31 6 7 58 47.1 71 122 -21 27 30 23 27 31 49 27 27 1 27 35 11 -0.02 - 50 0 0 27 1 5 7 58 53.8 72 123 -21 27 0 22 27 1 48 26 56 59 27 5 11 -0.02 - 49 0 0 26 30 22 7 59 0.5 73 124 -20 26 29 38 26 31 6 26 26 15 26 34 29 -0.02 - 48 0 0 25 58 57 7 59 7.4 74 125 -19 25 58 13 25 59 40 25 54 49 26 3 5 -0.02 - 47 0 0 25 26 49 7 59 14.4 75 125 -18 25 26 5 25 27 33 25 22 40 25 30 58 -0.02 - 46 0 0 24 54 0 7 59 21.4 76 126 -17 24 53 16 24 54 44 24 49 49 24 58 10 -0.02 - 45 0 0 24 20 28 7 59 28.6 77 127 -16 24 19 44 24 21 13 24 16 17 24 24 40 -0.02 - 44 0 0 23 46 15 7 59 35.9 78 128 -15 23 45 30 23 47 0 23 42 2 23 50 28 -0.02 - 43 0 0 23 11 20 7 59 43.2 79 129 -14 23 10 35 23 12 5 23 7 7 23 15 34 -0.02 - 42 0 0 22 35 44 7 59 50.7 81 131 -12 22 34 59 22 36 29 22 31 29 22 39 59 -0.02 - 41 0 0 21 59 27 7 59 58.2 82 132 -11 21 58 42 22 0 12 21 55 11 22 3 43 -0.02 - 40 0 0 21 22 29 8 0 5.8 83 134 -10 21 21 44 21 23 15 21 18 12 21 26 46 -0.02 - 39 0 0 20 44 52 8 0 13.5 84 137 -9 20 44 6 20 45 37 20 40 33 20 49 10 -0.02 - 38 0 0 20 6 34 8 0 21.3 85 140 -8 20 5 48 20 7 20 20 2 15 20 10 53 -0.02 - 37 0 0 19 27 38 8 0 29.2 86 146 -7 19 26 52 19 28 24 19 23 18 19 31 58 -0.03 - 36 0 0 18 48 3 8 0 37.1 87 155 -6 18 47 17 18 48 50 18 43 42 18 52 25 -0.03 - 35 0 0 18 7 52 8 0 45.1 88 176 -5 18 7 5 18 8 38 18 3 29 18 12 14 -0.03 - 34 0 0 17 27 3 8 0 53.2 88 218 -4 17 26 17 17 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31.8 55 305 28 - 3 18 50 - 3 17 14 - 3 22 34 - 3 13 29 -0.04 - 6 0 0 - 4 5 15 8 4 39.0 54 305 29 - 4 6 3 - 4 4 26 - 4 9 47 - 4 0 42 -0.04 - 5 0 0 - 4 52 12 8 4 46.0 53 305 31 - 4 53 0 - 4 51 24 - 4 56 44 - 4 47 41 -0.04 - 4 0 0 - 5 38 53 8 4 52.8 52 305 32 - 5 39 41 - 5 38 5 - 5 43 24 - 5 34 22 -0.04 - 3 0 0 - 6 25 15 8 4 59.5 50 305 33 - 6 26 3 - 6 24 27 - 6 29 46 - 6 20 45 -0.04 - 2 0 0 - 7 11 17 8 5 6.1 49 305 34 - 7 12 4 - 7 10 29 - 7 15 47 - 7 6 47 -0.04 - 1 0 0 - 7 56 56 8 5 12.5 48 305 35 - 7 57 44 - 7 56 8 - 8 1 25 - 7 52 27 -0.04 0 0 0 - 8 42 11 8 5 18.8 47 305 36 - 8 42 59 - 8 41 24 - 8 46 40 - 8 37 43 -0.04 1 0 0 - 9 27 1 8 5 24.9 45 305 37 - 9 27 48 - 9 26 14 - 9 31 29 - 9 22 33 -0.04 2 0 0 -10 11 24 8 5 30.8 44 305 39 -10 12 11 -10 10 37 -10 15 51 -10 6 57 -0.04 3 0 0 -10 55 18 8 5 36.5 43 304 40 -10 56 5 -10 54 31 -10 59 44 -10 50 52 -0.04 4 0 0 -11 38 43 8 5 42.1 42 304 41 -11 39 30 -11 37 56 -11 43 8 -11 34 17 -0.04 5 0 0 -12 21 36 8 5 47.6 40 304 42 -12 22 23 -12 20 49 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6 42.8 25 300 55 -20 45 44 -20 44 15 -20 49 11 -20 40 48 -0.04 19 0 0 -21 19 10 8 6 45.9 24 300 56 -21 19 54 -21 18 26 -21 23 20 -21 15 0 -0.04 20 0 0 -21 52 40 8 6 48.8 23 300 57 -21 53 24 -21 51 56 -21 56 49 -21 48 31 -0.04 21 0 0 -22 25 28 8 6 51.6 22 299 57 -22 26 12 -22 24 44 -22 29 36 -22 21 20 -0.04 22 0 0 -22 57 36 8 6 54.2 21 299 58 -22 58 19 -22 56 52 -23 1 42 -22 53 29 -0.04 23 0 0 -23 29 2 8 6 56.7 20 299 59 -23 29 45 -23 28 19 -23 33 8 -23 24 56 -0.04 24 0 0 -23 59 47 8 6 59.1 19 298 60 -24 0 30 -23 59 4 -24 3 52 -23 55 43 -0.04 25 0 0 -24 29 51 8 7 1.3 18 298 61 -24 30 34 -24 29 8 -24 33 55 -24 25 48 -0.05 26 0 0 -24 59 14 8 7 3.3 17 297 61 -24 59 57 -24 58 31 -25 3 16 -24 55 12 -0.05 27 0 0 -25 27 56 8 7 5.2 16 297 62 -25 28 38 -25 27 13 -25 31 57 -25 23 54 -0.05 28 0 0 -25 55 57 8 7 7.0 15 296 63 -25 56 39 -25 55 14 -25 59 57 -25 51 56 -0.05 29 0 0 -26 23 17 8 7 8.7 14 296 63 -26 23 59 -26 22 35 -26 27 16 -26 19 18 -0.05 30 0 0 -26 49 57 8 7 10.2 13 296 64 -26 50 39 -26 49 14 -26 53 55 -26 45 58 -0.05 31 0 0 -27 15 56 8 7 11.6 12 295 65 -27 16 38 -27 15 14 -27 19 53 -27 11 58 -0.05 32 0 0 -27 41 15 8 7 12.8 11 295 65 -27 41 57 -27 40 33 -27 45 11 -27 37 18 -0.05 33 0 0 -28 5 54 8 7 14.0 10 294 66 -28 6 35 -28 5 12 -28 9 49 -28 1 59 -0.05 34 0 0 -28 29 53 8 7 15.0 9 294 66 -28 30 35 -28 29 12 -28 33 48 -28 25 59 -0.05 35 0 0 -28 53 13 8 7 15.9 8 293 67 -28 53 55 -28 52 32 -28 57 7 -28 49 20 -0.05 36 0 0 -29 15 54 8 7 16.7 7 293 67 -29 16 35 -29 15 13 -29 19 47 -29 12 2 -0.05 37 0 0 -29 37 56 8 7 17.4 6 292 68 -29 38 37 -29 37 15 -29 41 48 -29 34 4 -0.06 38 0 0 -29 59 19 8 7 18.0 5 292 68 -30 0 0 -29 58 39 -30 3 10 -29 55 29 -0.06 39 0 0 -30 20 5 8 7 18.4 4 291 69 -30 20 45 -30 19 24 -30 23 54 -30 16 15 -0.07 40 0 0 -30 40 12 8 7 18.8 3 291 69 -30 40 52 -30 39 31 -30 44 1 -30 36 23 -0.08 41 0 0 -30 59 41 8 7 19.1 2 290 69 -31 0 22 -30 59 1 -31 3 29 -30 55 53 -0.09 42 0 0 -31 18 33 8 7 19.2 1 290 69 -31 19 14 -31 17 53 -31 22 21 -31 14 46 -0.14 43 0 0 -31 36 48 8 7 19.3 0 289 70 -31 37 29 -31 36 8 -31 40 35 -31 33 2 -0.67 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 1378-01350-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 16 24.8701 DE: +16 19 17.103 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 16 24.8703 DE: +16 19 17.102 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.4 * B mag [mag]: 10.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (16834) 1997 WU22 asteroid class: approx. diameter [km]: 2 approx. diameter ["]: 0.002 distance from Earth [AU]: 1.48240 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#571 date of fit: 2023 Apr 03 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): 0.008", 0.004", 100.501° remarks: * orbital elements for (16834)1997 WU22 : Mean anomaly = 254.8666100053 deg Arg. of pericenter = 334.3951310619 deg Long. of node = 260.7575281963 deg Inclination = 15.9971911169 deg Eccentricity = 0.4420861065 Semimajor axis = 1.4680425324 AU Perihelion dist = 0.8190413251 AU Mag: H = 15.80, G = 0.15 Epoch of elements : MJD 60613.33394117 TDT (2024 Oct 30.3339) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#5712023Apr03,0.14,2024,10,30,8.014603,0.013612,0.020062,7.676110,-5.248687,-0.005035,0.001188,0.000000,0.000000 -34.8959,16.2461,55.69,-13.98,False TYC 1378-01350-1,8.27357499,16.3214175,10.52,10.37,10.29,0.0,0,,8.29702202,16.2460888,8.99,8.62,0,0,0 16834,1997 WU22,19.36,2.327,1.4824,0,0,3.162,-31.15,,0.4,0 0,254.6816,2024,10,30,334.3951,260.7575,15.9972,0.44209,1.46804,0.81904,15.80,5.0,0.15 3.330,0.0080,0.0043,101,0.0051,Known errors,1.18,0,-1,-1 20241030_1350-1,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org