IOTA/IOTA-ES occultation update for (1736) Floirac / TYC 1360-01620-1 event on 2024 Oct 17, 16:31 UT Visible from Summary ------- On 2024 Oct 17 UT, the 9.128 km diameter asteroid (1736) Floirac will occult a 11.7 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.33 mag to 15.98 mag (the magnitude of the asteroid) for at most 0.540 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 17, 16:25 - 2024 Oct 17, 16:38 * geocentric midpoint of event [JD]: 2460601.18879120 * magnitude of target star: 11.67 * magnitude drop [mag]: 4.33 * estimated maximum duration [s]: 0.540 * Moon: 100 % sunlit, 83° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 9 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 95°) * approx speed of asteroid's shadow [km/s]: 16.8526 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1360-01620-1 by 1736 Floirac on 2024 Oct 17 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 105 0 0 17 31 58 16 25 34.4 0 73 -81 17 29 23 17 34 34 17 27 43 17 36 14 .... 106 0 0 17 49 25 16 25 34.5 1 73 -81 17 46 50 17 52 1 17 45 10 17 53 40 -0.13 107 0 0 18 6 36 16 25 34.7 2 74 -81 18 4 1 18 9 12 18 2 22 18 10 51 -0.11 108 0 0 18 23 31 16 25 35.1 3 74 -81 18 20 56 18 26 6 18 19 17 18 27 45 -0.10 109 0 0 18 40 9 16 25 35.5 4 74 -81 18 37 34 18 42 44 18 35 55 18 44 23 -0.10 110 0 0 18 56 31 16 25 36.1 5 75 -81 18 53 56 18 59 6 18 52 17 19 0 44 -0.10 111 0 0 19 12 35 16 25 36.8 6 75 -80 19 10 0 19 15 10 19 8 22 19 16 49 -0.10 112 0 0 19 28 22 16 25 37.5 7 75 -80 19 25 48 19 30 57 19 24 9 19 32 36 -0.09 113 0 0 19 43 52 16 25 38.4 8 76 -79 19 41 18 19 46 27 19 39 39 19 48 5 -0.09 114 0 0 19 59 4 16 25 39.4 9 76 -79 19 56 30 20 1 39 19 54 52 20 3 17 -0.09 115 0 0 20 13 59 16 25 40.5 10 76 -78 20 11 25 20 16 33 20 9 46 20 18 11 -0.09 116 0 0 20 28 35 16 25 41.7 11 77 -78 20 26 1 20 31 9 20 24 23 20 32 47 -0.09 117 0 0 20 42 53 16 25 43.1 12 77 -77 20 40 19 20 45 27 20 38 41 20 47 5 -0.09 118 0 0 20 56 53 16 25 44.5 13 77 -76 20 54 19 20 59 26 20 52 41 21 1 4 -0.09 119 0 0 21 10 34 16 25 46.0 14 78 -75 21 8 0 21 13 7 21 6 23 21 14 45 -0.09 120 0 0 21 23 56 16 25 47.6 15 78 -75 21 21 23 21 26 29 21 19 45 21 28 7 -0.09 121 0 0 21 36 59 16 25 49.3 16 78 -74 21 34 27 21 39 32 21 32 49 21 41 10 -0.09 122 0 0 21 49 44 16 25 51.1 17 79 -73 21 47 11 21 52 16 21 45 34 21 53 54 -0.09 123 0 0 22 2 9 16 25 53.1 18 79 -72 21 59 36 22 4 41 21 57 59 22 6 19 -0.09 124 0 0 22 14 15 16 25 55.1 19 80 -71 22 11 43 22 16 47 22 10 5 22 18 24 -0.09 125 0 0 22 26 1 16 25 57.2 20 80 -71 22 23 29 22 28 33 22 21 52 22 30 11 -0.09 126 0 0 22 37 28 16 25 59.4 21 80 -70 22 34 56 22 40 0 22 33 19 22 41 37 -0.09 127 0 0 22 48 35 16 26 1.7 22 81 -69 22 46 4 22 51 7 22 44 27 22 52 44 -0.09 128 0 0 22 59 23 16 26 4.1 23 81 -68 22 56 51 23 1 54 22 55 14 23 3 31 -0.09 129 0 0 23 9 50 16 26 6.5 24 82 -67 23 7 19 23 12 22 23 5 42 23 13 59 -0.09 130 0 0 23 19 58 16 26 9.1 25 82 -66 23 17 27 23 22 29 23 15 50 23 24 6 -0.09 131 0 0 23 29 46 16 26 11.7 26 82 -65 23 27 14 23 32 17 23 25 38 23 33 53 -0.08 132 0 0 23 39 13 16 26 14.5 27 83 -65 23 36 42 23 41 44 23 35 6 23 43 20 -0.08 133 0 0 23 48 20 16 26 17.3 27 83 -64 23 45 49 23 50 51 23 44 13 23 52 27 -0.08 134 0 0 23 57 7 16 26 20.2 28 84 -63 23 54 36 23 59 38 23 53 0 24 1 14 -0.08 135 0 0 24 5 33 16 26 23.2 29 84 -62 24 3 3 24 8 4 24 1 27 24 9 40 -0.08 136 0 0 24 13 39 16 26 26.3 30 85 -61 24 11 9 24 16 10 24 9 33 24 17 46 -0.08 137 0 0 24 21 25 16 26 29.5 31 85 -60 24 18 55 24 23 55 24 17 19 24 25 31 -0.08 138 0 0 24 28 50 16 26 32.7 32 85 -59 24 26 20 24 31 20 24 24 44 24 32 56 -0.08 139 0 0 24 35 54 16 26 36.0 33 86 -58 24 33 24 24 38 24 24 31 48 24 40 0 -0.08 140 0 0 24 42 38 16 26 39.4 34 86 -57 24 40 8 24 45 7 24 38 32 24 46 43 -0.08 141 0 0 24 49 0 16 26 42.9 35 87 -57 24 46 31 24 51 30 24 44 55 24 53 6 -0.08 142 0 0 24 55 2 16 26 46.5 36 87 -56 24 52 33 24 57 32 24 50 57 24 59 8 -0.08 143 0 0 25 0 44 16 26 50.1 37 88 -55 24 58 14 25 3 13 24 56 39 25 4 49 -0.08 144 0 0 25 6 4 16 26 53.8 38 88 -54 25 3 35 25 8 34 25 1 59 25 10 9 -0.08 145 0 0 25 11 4 16 26 57.6 39 89 -53 25 8 34 25 13 33 25 6 59 25 15 8 -0.08 146 0 0 25 15 42 16 27 1.5 40 89 -52 25 13 13 25 18 11 25 11 37 25 19 47 -0.08 147 0 0 25 20 0 16 27 5.4 40 90 -51 25 17 30 25 22 29 25 15 55 25 24 4 -0.08 148 0 0 25 23 56 16 27 9.4 41 90 -50 25 21 27 25 26 25 25 19 52 25 28 1 -0.08 149 0 0 25 27 32 16 27 13.5 42 91 -49 25 25 2 25 30 1 25 23 27 25 31 36 -0.08 150 0 0 25 30 46 16 27 17.6 43 91 -48 25 28 17 25 33 15 25 26 42 25 34 50 -0.08 151 0 0 25 33 39 16 27 21.8 44 92 -48 25 31 10 25 36 8 25 29 35 25 37 43 -0.08 152 0 0 25 36 11 16 27 26.1 45 92 -47 25 33 42 25 38 40 25 32 7 25 40 15 -0.08 153 0 0 25 38 22 16 27 30.5 46 93 -46 25 35 53 25 40 51 25 34 18 25 42 26 -0.08 154 0 0 25 40 12 16 27 34.9 47 93 -45 25 37 43 25 42 41 25 36 8 25 44 16 -0.08 155 0 0 25 41 41 16 27 39.3 48 94 -44 25 39 12 25 44 9 25 37 37 25 45 45 -0.08 156 0 0 25 42 48 16 27 43.9 49 94 -43 25 40 19 25 45 17 25 38 44 25 46 52 -0.08 157 0 0 25 43 34 16 27 48.5 50 95 -42 25 41 5 25 46 3 25 39 30 25 47 38 -0.08 158 0 0 25 43 59 16 27 53.2 51 95 -41 25 41 30 25 46 28 25 39 55 25 48 3 -0.08 159 0 0 25 44 2 16 27 57.9 51 96 -40 25 41 34 25 46 31 25 39 59 25 48 6 -0.08 160 0 0 25 43 45 16 28 2.7 52 96 -39 25 41 16 25 46 13 25 39 41 25 47 48 -0.08 161 0 0 25 43 6 16 28 7.6 53 97 -39 25 40 37 25 45 34 25 39 2 25 47 9 -0.08 162 0 0 25 42 5 16 28 12.5 54 98 -38 25 39 36 25 44 34 25 38 1 25 46 9 -0.08 163 0 0 25 40 43 16 28 17.5 55 98 -37 25 38 14 25 43 12 25 36 39 25 44 47 -0.08 164 0 0 25 39 0 16 28 22.5 56 99 -36 25 36 31 25 41 29 25 34 56 25 43 4 -0.08 165 0 0 25 36 56 16 28 27.6 57 99 -35 25 34 27 25 39 25 25 32 52 25 41 0 -0.08 166 0 0 25 34 30 16 28 32.7 58 100 -34 25 32 1 25 36 59 25 30 26 25 38 34 -0.08 167 0 0 25 31 43 16 28 38.0 59 101 -33 25 29 14 25 34 12 25 27 38 25 35 47 -0.08 168 0 0 25 28 34 16 28 43.2 60 101 -32 25 26 5 25 31 3 25 24 30 25 32 38 -0.08 169 0 0 25 25 4 16 28 48.5 61 102 -31 25 22 35 25 27 33 25 21 0 25 29 8 -0.08 170 0 0 25 21 12 16 28 53.9 61 103 -30 25 18 43 25 23 42 25 17 8 25 25 17 -0.08 171 0 0 25 17 0 16 28 59.3 62 103 -29 25 14 30 25 19 29 25 12 55 25 21 4 -0.08 172 0 0 25 12 25 16 29 4.8 63 104 -28 25 9 56 25 14 55 25 8 21 25 16 30 -0.08 173 0 0 25 7 30 16 29 10.3 64 105 -28 25 5 0 25 9 59 25 3 25 25 11 35 -0.08 174 0 0 25 2 13 16 29 15.9 65 106 -27 24 59 43 25 4 42 24 58 8 25 6 18 -0.08 175 0 0 24 56 34 16 29 21.6 66 106 -26 24 54 5 24 59 4 24 52 29 25 0 39 -0.08 176 0 0 24 50 34 16 29 27.2 67 107 -25 24 48 5 24 53 4 24 46 29 24 54 40 -0.08 177 0 0 24 44 13 16 29 33.0 68 108 -24 24 41 43 24 46 43 24 40 8 24 48 19 -0.08 178 0 0 24 37 31 16 29 38.8 69 109 -23 24 35 1 24 40 1 24 33 25 24 41 37 -0.08 179 0 0 24 30 27 16 29 44.6 70 110 -22 24 27 57 24 32 57 24 26 21 24 34 33 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11 20 9 11 13 9 11 21 51 -0.09 -129 0 0 10 55 9 16 35 16.0 57 283 30 10 52 30 10 57 49 10 50 48 10 59 31 -0.09 -128 0 0 10 32 40 16 35 21.9 56 284 31 10 30 0 10 35 19 10 28 18 10 37 1 -0.09 -127 0 0 10 10 1 16 35 27.8 55 284 32 10 7 22 10 12 41 10 5 40 10 14 23 -0.09 -126 0 0 9 47 15 16 35 33.6 54 284 33 9 44 35 9 49 54 9 42 53 9 51 36 -0.09 -125 0 0 9 24 21 16 35 39.3 53 285 35 9 21 41 9 27 0 9 19 59 9 28 42 -0.09 -124 0 0 9 1 20 16 35 45.0 52 285 36 8 58 40 9 4 0 8 56 58 9 5 42 -0.09 -123 0 0 8 38 12 16 35 50.5 50 285 37 8 35 32 8 40 52 8 33 50 8 42 34 -0.09 -122 0 0 8 14 59 16 35 56.0 49 285 38 8 12 19 8 17 39 8 10 37 8 19 21 -0.09 -121 0 0 7 51 41 16 36 1.4 48 286 39 7 49 1 7 54 21 7 47 19 7 56 3 -0.09 -120 0 0 7 28 18 16 36 6.7 47 286 40 7 25 38 7 30 58 7 23 55 7 32 40 -0.09 -119 0 0 7 4 50 16 36 12.0 46 286 41 7 2 10 7 7 31 7 0 28 7 9 13 -0.09 -118 0 0 6 41 20 16 36 17.1 45 286 42 6 38 40 6 44 0 6 36 57 6 45 42 -0.09 -117 0 0 6 17 46 16 36 22.2 44 287 43 6 15 6 6 20 26 6 13 24 6 22 9 -0.09 -116 0 0 5 54 10 16 36 27.1 43 287 44 5 51 30 5 56 50 5 49 48 5 58 33 -0.09 -115 0 0 5 30 32 16 36 32.0 42 287 45 5 27 52 5 33 13 5 26 10 5 34 55 -0.09 -114 0 0 5 6 54 16 36 36.8 41 287 46 5 4 13 5 9 34 5 2 31 5 11 16 -0.09 -113 0 0 4 43 14 16 36 41.4 40 287 48 4 40 34 4 45 55 4 38 52 4 47 37 -0.09 -112 0 0 4 19 35 16 36 46.0 39 287 49 4 16 55 4 22 15 4 15 13 4 23 58 -0.09 -111 0 0 3 55 56 16 36 50.4 37 288 50 3 53 16 3 58 37 3 51 34 4 0 19 -0.09 -110 0 0 3 32 19 16 36 54.7 36 288 51 3 29 39 3 34 59 3 27 57 3 36 42 -0.09 -109 0 0 3 8 44 16 36 59.0 35 288 52 3 6 3 3 11 24 3 4 21 3 13 6 -0.09 -108 0 0 2 45 10 16 37 3.1 34 288 53 2 42 30 2 47 51 2 40 48 2 49 33 -0.09 -107 0 0 2 21 40 16 37 7.1 33 288 54 2 19 0 2 24 21 2 17 18 2 26 3 -0.09 -106 0 0 1 58 14 16 37 11.0 32 288 55 1 55 34 2 0 54 1 53 52 2 2 36 -0.09 -105 0 0 1 34 52 16 37 14.7 31 288 56 1 32 12 1 37 32 1 30 30 1 39 14 -0.09 -104 0 0 1 11 34 16 37 18.4 30 288 57 1 8 54 1 14 14 1 7 12 1 15 56 -0.09 -103 0 0 0 48 22 16 37 21.9 29 288 58 0 45 42 0 51 2 0 44 0 0 52 44 -0.09 -102 0 0 0 25 16 16 37 25.3 28 288 59 0 22 36 0 27 56 0 20 54 0 29 37 -0.09 -101 0 0 0 2 16 16 37 28.6 27 288 61 - 0 0 24 0 4 56 - 0 2 5 0 6 37 -0.09 -100 0 0 - 0 20 37 16 37 31.7 26 288 62 - 0 23 16 - 0 17 57 - 0 24 58 - 0 16 16 -0.10 - 99 0 0 - 0 43 22 16 37 34.7 24 288 63 - 0 46 1 - 0 40 43 - 0 47 43 - 0 39 1 -0.10 - 98 0 0 - 1 5 59 16 37 37.6 23 288 64 - 1 8 39 - 1 3 20 - 1 10 20 - 1 1 39 -0.10 - 97 0 0 - 1 28 28 16 37 40.4 22 288 65 - 1 31 7 - 1 25 49 - 1 32 49 - 1 24 8 -0.10 - 96 0 0 - 1 50 48 16 37 43.0 21 288 66 - 1 53 27 - 1 48 9 - 1 55 8 - 1 46 27 -0.10 - 95 0 0 - 2 12 58 16 37 45.6 20 288 67 - 2 15 37 - 2 10 19 - 2 17 18 - 2 8 38 -0.10 - 94 0 0 - 2 34 58 16 37 47.9 19 288 68 - 2 37 37 - 2 32 19 - 2 39 18 - 2 30 38 -0.10 - 93 0 0 - 2 56 48 16 37 50.2 18 288 69 - 2 59 26 - 2 54 9 - 3 1 8 - 2 52 28 -0.10 - 92 0 0 - 3 18 26 16 37 52.3 17 288 70 - 3 21 5 - 3 15 48 - 3 22 46 - 3 14 7 -0.10 - 91 0 0 - 3 39 54 16 37 54.3 16 288 71 - 3 42 32 - 3 37 15 - 3 44 13 - 3 35 34 -0.10 - 90 0 0 - 4 1 9 16 37 56.2 15 288 72 - 4 3 47 - 3 58 31 - 4 5 28 - 3 56 50 -0.10 - 89 0 0 - 4 22 12 16 37 57.9 14 288 73 - 4 24 50 - 4 19 34 - 4 26 31 - 4 17 53 -0.10 - 88 0 0 - 4 43 2 16 37 59.5 13 288 75 - 4 45 40 - 4 40 24 - 4 47 21 - 4 38 44 -0.10 - 87 0 0 - 5 3 39 16 38 1.0 12 288 76 - 5 6 17 - 5 1 2 - 5 7 57 - 4 59 21 -0.10 - 86 0 0 - 5 24 3 16 38 2.4 11 288 77 - 5 26 40 - 5 21 25 - 5 28 21 - 5 19 45 -0.10 - 85 0 0 - 5 44 13 16 38 3.6 10 288 78 - 5 46 50 - 5 41 35 - 5 48 30 - 5 39 55 -0.11 - 84 0 0 - 6 4 8 16 38 4.7 8 287 79 - 6 6 45 - 6 1 31 - 6 8 25 - 5 59 51 -0.11 - 83 0 0 - 6 23 49 16 38 5.6 7 287 80 - 6 26 26 - 6 21 12 - 6 28 6 - 6 19 32 -0.11 - 82 0 0 - 6 43 15 16 38 6.5 6 287 81 - 6 45 51 - 6 40 38 - 6 47 31 - 6 38 58 -0.11 - 81 0 0 - 7 2 25 16 38 7.2 5 287 82 - 7 5 2 - 6 59 49 - 7 6 42 - 6 58 9 -0.12 - 80 0 0 - 7 21 20 16 38 7.7 4 287 83 - 7 23 56 - 7 18 44 - 7 25 36 - 7 17 4 -0.12 - 79 0 0 - 7 39 59 16 38 8.2 3 287 84 - 7 42 35 - 7 37 23 - 7 44 15 - 7 35 43 -0.14 - 78 0 0 - 7 58 22 16 38 8.5 2 287 85 - 8 0 58 - 7 55 46 - 8 2 37 - 7 54 6 -0.16 - 77 0 0 - 8 16 28 16 38 8.7 1 287 86 - 8 19 4 - 8 13 52 - 8 20 43 - 8 12 13 -0.22 - 76 0 0 - 8 34 17 16 38 8.8 0 286 87 - 8 36 53 - 8 31 42 - 8 38 32 - 8 30 3 -1.22 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 1360-01620-1 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 29 59.2792 DE: +16 19 33.644 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 29 59.2793 DE: +16 19 33.644 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1736) Floirac asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.008 distance from Earth [AU]: 1.55820 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.015", 0.001", 94.62° remarks: * orbital elements for (1736)Floirac : Mean anomaly = 21.8745885269 deg Arg. of pericenter = 249.2219072561 deg Long. of node = 159.6960549192 deg Inclination = 4.5522107660 deg Eccentricity = 0.1694241407 Semimajor axis = 2.2290106158 AU Perihelion dist = 1.8513624077 AU Mag: H = 12.28, G = 0.15 Epoch of elements : MJD 60600.68879091 TDT (2024 Oct 17.6888) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,0.54,2024,10,17,16.530989,0.018639,0.077400,9.250126,-2.217020,-0.005069,0.000819,0.000000,0.000000 -161.7815,16.2758,-71.66,-9.60,False TYC 1360-01620-1,7.49979975,16.3260123,11.99,11.67,11.50,0.0,0,,7.52345602,16.2758391,4.33,4.06,0,0,0 1736,Floirac,15.98,9.128,1.5582,0,0,3.625,-12.52,,0.6,0 0,21.6706,2024,10,17,249.2219,159.6961,4.5522,0.16942,2.22901,1.85136,12.28,5.0,0.15 1.319,0.0153,0.0011,95,0.0026,Known errors,0.80,0,-1,-1 20241017_1620-1,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org