IOTA/IOTA-ES occultation update for (160) Una / TYC 1816-01454-1 event on 2023 Aug 09, 19:00 UT Visible from Asia Summary ------- On 2023 Aug 09 UT, the 81.8 km diameter asteroid (160) Una will occult a 11.3 mag star in the constellation Taurus for observers along a path across Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.17 mag to 14.42 mag (the magnitude of the asteroid) for at most 2.900 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: 100 * date and approx. time of event: 2023 Aug 09, 18:57 - 2023 Aug 09, 19:03 * geocentric midpoint of event [JD]: 2460166.29185525 * magnitude of target star: 11.31 * magnitude drop [mag]: 3.17 * estimated maximum duration [s]: 2.900 * Moon: 36 % sunlit, 5° distance * Sun: 69° distance * rough path description: Asia The occultation path -------------------- * approximate projected width [km]: 112 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 77°) * approx speed of asteroid's shadow [km/s]: 28.1968 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1816-01454-1 by 160 Una on 2023 Aug 9 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 80 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 28 1 13 .. .. .. 28 6 6 .... 81 0 0 27 54 10 18 57 31.6 1 64 -46 27 19 53 28 28 49 27 15 5 28 33 43 .... 82 0 0 28 22 4 18 57 31.7 2 64 -46 27 47 38 28 56 53 27 42 50 29 1 48 -0.81 83 0 0 28 50 25 18 57 32.0 3 64 -45 28 15 50 29 25 22 28 11 0 29 30 19 -0.86 84 0 0 29 19 11 18 57 32.3 4 65 -45 28 44 27 29 54 18 28 39 35 29 59 16 -0.88 85 0 0 29 48 22 18 57 32.7 5 65 -44 29 13 29 30 23 39 29 8 36 30 28 39 -0.90 86 0 0 30 17 58 18 57 33.2 6 66 -43 29 42 55 30 53 24 29 38 1 30 58 25 -0.91 87 0 0 30 47 56 18 57 33.9 7 66 -43 30 12 44 31 23 32 30 7 49 31 28 34 -0.91 88 0 0 31 18 17 18 57 34.6 8 67 -42 30 42 56 31 54 3 30 37 59 31 59 6 -0.92 89 0 0 31 48 59 18 57 35.4 9 68 -41 31 13 29 32 24 54 31 8 31 32 29 59 -0.92 90 0 0 32 20 2 18 57 36.2 10 68 -40 31 44 22 32 56 7 31 39 23 33 1 13 -0.93 91 0 0 32 51 24 18 57 37.2 11 69 -40 32 15 35 33 27 38 32 10 35 33 32 46 -0.93 92 0 0 33 23 4 18 57 38.3 12 69 -39 32 47 6 33 59 28 32 42 5 34 4 37 -0.93 93 0 0 33 55 2 18 57 39.4 13 70 -38 33 18 55 34 31 36 33 13 52 34 36 46 -0.93 94 0 0 34 27 16 18 57 40.7 14 70 -37 33 51 0 35 3 59 33 45 56 35 9 11 -0.93 95 0 0 34 59 46 18 57 42.0 15 71 -37 34 23 20 35 36 38 34 18 15 35 41 51 -0.94 96 0 0 35 32 29 18 57 43.4 16 72 -36 34 55 54 36 9 30 34 50 48 36 14 45 -0.94 97 0 0 36 5 25 18 57 44.9 17 72 -35 35 28 42 36 42 36 35 23 34 36 47 51 -0.94 98 0 0 36 38 33 18 57 46.5 18 73 -34 36 1 41 37 15 52 35 56 32 37 21 9 -0.94 99 0 0 37 11 51 18 57 48.1 18 74 -33 36 34 51 37 49 19 36 29 41 37 54 37 -0.94 100 0 0 37 45 19 18 57 49.8 19 75 -32 37 8 10 38 22 55 37 2 59 38 28 15 -0.94 101 0 0 38 18 54 18 57 51.6 20 75 -32 37 41 37 38 56 39 37 36 25 39 2 0 -0.94 102 0 0 38 52 36 18 57 53.5 21 76 -31 38 15 12 39 30 29 38 9 58 39 35 51 -0.94 103 0 0 39 26 24 18 57 55.4 22 77 -30 38 48 51 40 4 24 38 43 37 40 9 47 -0.94 104 0 0 40 0 15 18 57 57.4 23 78 -29 39 22 35 40 38 23 39 17 20 40 43 47 -0.94 105 0 0 40 34 9 18 57 59.5 24 78 -28 39 56 22 41 12 25 39 51 6 41 17 50 -0.94 106 0 0 41 8 4 18 58 1.6 25 79 -27 40 30 11 41 46 27 40 24 53 41 51 53 -0.94 107 0 0 41 41 59 18 58 3.8 26 80 -26 41 4 0 42 20 29 40 58 41 42 25 56 -0.94 108 0 0 42 15 53 18 58 6.1 26 81 -25 41 37 47 42 54 29 41 32 28 42 59 58 -0.94 109 0 0 42 49 45 18 58 8.4 27 82 -25 42 11 33 43 28 27 42 6 13 43 33 56 -0.94 110 0 0 43 23 32 18 58 10.7 28 83 -24 42 45 15 44 2 20 42 39 54 44 7 50 -0.94 111 0 0 43 57 14 18 58 13.1 29 84 -23 43 18 51 44 36 7 43 13 30 44 41 38 -0.94 112 0 0 44 30 49 18 58 15.5 30 85 -22 43 52 22 45 9 48 43 47 0 45 15 19 -0.94 113 0 0 45 4 17 18 58 18.0 30 86 -21 44 25 45 45 43 20 44 20 23 45 48 52 -0.94 114 0 0 45 37 35 18 58 20.5 31 87 -20 44 59 0 46 16 42 44 53 36 46 22 14 -0.94 115 0 0 46 10 43 18 58 23.0 32 88 -19 45 32 4 46 49 53 45 26 40 46 55 27 -0.94 116 0 0 46 43 39 18 58 25.6 33 89 -18 46 4 57 47 22 53 45 59 33 47 28 26 -0.95 117 0 0 47 16 22 18 58 28.2 33 90 -18 46 37 38 47 55 39 46 32 13 48 1 13 -0.95 118 0 0 47 48 52 18 58 30.8 34 91 -17 47 10 5 48 28 10 47 4 40 48 33 45 -0.95 119 0 0 48 21 6 18 58 33.5 35 92 -16 47 42 17 49 0 26 47 36 52 49 6 1 -0.95 120 0 0 48 53 4 18 58 36.1 35 93 -15 48 14 14 49 32 26 48 8 49 49 38 0 -0.95 121 0 0 49 24 44 18 58 38.8 36 95 -14 48 45 53 50 4 7 48 40 28 50 9 42 -0.95 122 0 0 49 56 6 18 58 41.5 36 96 -13 49 17 15 50 35 30 49 11 50 50 41 4 -0.95 123 0 0 50 27 9 18 58 44.2 37 97 -12 49 48 18 51 6 32 49 42 53 51 12 7 -0.95 124 0 0 50 57 52 18 58 46.9 38 98 -12 50 19 2 51 37 15 50 13 37 51 42 49 -0.95 125 0 0 51 28 14 18 58 49.6 38 99 -11 50 49 25 52 7 35 50 44 0 52 13 10 -0.95 126 0 0 51 58 14 18 58 52.3 39 101 -10 51 19 26 52 37 33 51 14 1 52 43 8 -0.95 127 0 0 52 27 51 18 58 55.0 39 102 -9 51 49 5 53 7 8 51 43 41 53 12 43 -0.95 128 0 0 52 57 5 18 58 57.8 40 103 -8 52 18 21 53 36 20 52 12 57 53 41 53 -0.95 129 0 0 53 25 55 18 59 0.5 40 105 -8 52 47 14 54 5 6 52 41 50 54 10 40 -0.95 130 0 0 53 54 20 18 59 3.1 41 106 -7 53 15 43 54 33 28 53 10 19 54 39 1 -0.95 131 0 0 54 22 19 18 59 5.8 41 107 -6 53 43 46 55 1 24 53 38 23 55 6 56 -0.95 132 0 0 54 49 54 18 59 8.5 41 109 -5 54 11 24 55 28 54 54 6 2 55 34 25 -0.95 133 0 0 55 17 2 18 59 11.2 42 110 -5 54 38 37 55 55 57 54 33 15 56 1 28 -0.95 134 0 0 55 43 43 18 59 13.8 42 111 -4 55 5 23 56 22 33 55 0 3 56 28 3 -0.95 135 0 0 56 9 58 18 59 16.4 43 113 -3 55 31 43 56 48 42 55 26 23 56 54 12 -0.95 136 0 0 56 35 45 18 59 19.0 43 114 -3 55 57 36 57 14 24 55 52 17 57 19 52 -0.95 137 0 0 57 1 5 18 59 21.6 43 116 -2 56 23 2 57 39 37 56 17 44 57 45 5 -0.95 138 0 0 57 25 57 18 59 24.2 44 117 -1 56 48 1 58 4 22 56 42 43 58 9 49 -0.95 139 0 0 57 50 21 18 59 26.8 44 118 0 57 12 32 58 28 40 57 7 15 58 34 5 -0.95 140 0 0 58 14 17 18 59 29.3 44 120 0 57 36 35 58 52 29 57 31 19 58 57 53 -0.95 141 0 0 58 37 45 18 59 31.8 44 121 1 58 0 10 59 15 49 57 54 55 59 21 13 -0.95 142 0 0 59 0 45 18 59 34.3 45 123 1 58 23 18 59 38 42 58 18 4 59 44 4 -0.95 143 0 0 59 23 17 18 59 36.7 45 124 2 58 45 58 60 1 5 58 40 45 60 6 27 -0.95 144 0 0 59 45 21 18 59 39.1 45 126 3 59 8 9 60 23 1 59 2 58 60 28 21 -0.95 145 0 0 60 6 57 18 59 41.5 45 127 3 59 29 54 60 44 28 59 24 43 60 49 47 -0.95 146 0 0 60 28 5 18 59 43.9 45 129 4 59 51 10 61 5 27 59 46 1 61 10 45 -0.95 147 0 0 60 48 45 18 59 46.2 46 130 5 60 11 59 61 25 58 60 6 50 61 31 15 -0.95 148 0 0 61 8 57 18 59 48.6 46 132 5 60 32 20 61 46 2 60 27 13 61 51 17 -0.95 149 0 0 61 28 43 18 59 50.8 46 133 6 60 52 14 62 5 38 60 47 8 62 10 51 -0.95 150 0 0 61 48 0 18 59 53.1 46 135 6 61 11 40 62 24 46 61 6 36 62 29 59 -0.95 151 0 0 62 6 51 18 59 55.3 46 136 7 61 30 40 62 43 28 61 25 37 62 48 39 -0.95 152 0 0 62 25 15 18 59 57.5 46 138 7 61 49 14 63 1 42 61 44 12 63 6 52 -0.95 153 0 0 62 43 13 18 59 59.7 46 139 8 62 7 20 63 19 30 62 2 20 63 24 38 -0.95 154 0 0 63 0 44 19 0 1.9 46 140 8 62 25 1 63 36 52 62 20 2 63 41 58 -0.95 155 0 0 63 17 49 19 0 4.0 46 142 9 62 42 16 63 53 47 62 37 17 63 58 53 -0.95 156 0 0 63 34 29 19 0 6.1 46 143 9 62 59 5 64 10 17 62 54 8 64 15 21 -0.95 157 0 0 63 50 43 19 0 8.1 46 145 10 63 15 28 64 26 22 63 10 33 64 31 24 -0.95 158 0 0 64 6 32 19 0 10.2 46 146 10 63 31 27 64 42 1 63 26 33 64 47 2 -0.95 159 0 0 64 21 57 19 0 12.2 47 148 11 63 47 1 64 57 16 63 42 8 65 2 16 -0.95 160 0 0 64 36 57 19 0 14.2 47 149 11 64 2 10 65 12 7 63 57 19 65 17 5 -0.95 161 0 0 64 51 33 19 0 16.1 47 151 12 64 16 56 65 26 33 64 12 6 65 31 30 -0.95 162 0 0 65 5 46 19 0 18.0 47 152 12 64 31 18 65 40 36 64 26 29 65 45 32 -0.95 163 0 0 65 19 35 19 0 20.0 47 154 13 64 45 16 65 54 16 64 40 28 65 59 10 -0.95 164 0 0 65 33 1 19 0 21.8 46 155 13 64 58 51 66 7 33 64 54 5 66 12 26 -0.95 165 0 0 65 46 5 19 0 23.7 46 156 14 65 12 4 66 20 27 65 7 19 66 25 19 -0.95 166 0 0 65 58 46 19 0 25.5 46 158 14 65 24 54 66 32 59 65 20 10 66 37 49 -0.95 167 0 0 66 11 5 19 0 27.3 46 159 15 65 37 22 66 45 9 65 32 40 66 49 58 -0.95 168 0 0 66 23 3 19 0 29.1 46 161 15 65 49 29 66 56 58 65 44 47 67 1 46 -0.95 169 0 0 66 34 40 19 0 30.9 46 162 15 66 1 14 67 8 26 65 56 34 67 13 12 -0.95 170 0 0 66 45 55 19 0 32.6 46 163 16 66 12 38 67 19 33 66 7 59 67 24 18 -0.95 171 0 0 66 56 50 19 0 34.3 46 165 16 66 23 41 67 30 19 66 19 3 67 35 3 -0.95 172 0 0 67 7 25 19 0 36.0 46 166 17 66 34 24 67 40 46 66 29 47 67 45 28 -0.95 173 0 0 67 17 40 19 0 37.7 46 167 17 66 44 47 67 50 52 66 40 11 67 55 34 -0.95 174 0 0 67 27 35 19 0 39.3 46 169 17 66 54 50 68 0 39 66 50 16 68 5 20 -0.95 175 0 0 67 37 11 19 0 41.0 46 170 18 67 4 34 68 10 7 67 0 0 68 14 47 -0.95 176 0 0 67 46 28 19 0 42.6 46 172 18 67 13 58 68 19 16 67 9 26 68 23 55 -0.95 177 0 0 67 55 26 19 0 44.2 46 173 19 67 23 4 68 28 7 67 18 32 68 32 44 -0.95 178 0 0 68 4 6 19 0 45.7 46 174 19 67 31 51 68 36 39 67 27 20 68 41 16 -0.95 179 0 0 68 12 28 19 0 47.3 45 176 19 67 40 20 68 44 54 67 35 50 68 49 29 -0.95 -180 0 0 68 20 32 19 0 48.8 45 177 20 67 48 30 68 52 51 67 44 2 68 57 25 -0.95 -179 0 0 68 28 18 19 0 50.4 45 178 20 67 56 23 69 0 30 67 51 56 69 5 3 -0.95 -178 0 0 68 35 47 19 0 51.9 45 180 20 68 3 59 69 7 53 67 59 32 69 12 25 -0.95 -177 0 0 68 42 59 19 0 53.3 45 181 21 68 11 17 69 14 58 68 6 51 69 19 29 -0.95 -176 0 0 68 49 54 19 0 54.8 45 182 21 68 18 18 69 21 47 68 13 53 69 26 17 -0.95 -175 0 0 68 56 32 19 0 56.3 45 183 21 68 25 3 69 28 19 68 20 38 69 32 49 -0.95 -174 0 0 69 2 54 19 0 57.7 45 185 22 68 31 30 69 34 36 68 27 7 69 39 4 -0.95 -173 0 0 69 9 1 19 0 59.1 44 186 22 68 37 42 69 40 36 68 33 19 69 45 4 -0.95 -172 0 0 69 14 51 19 1 0.6 44 187 22 68 43 37 69 46 21 68 39 15 69 50 48 -0.95 -171 0 0 69 20 25 19 1 2.0 44 189 23 68 49 17 69 51 50 68 44 55 69 56 16 -0.95 -170 0 0 69 25 44 19 1 3.3 44 190 23 68 54 40 69 57 4 68 50 20 70 1 29 -0.95 -169 0 0 69 30 47 19 1 4.7 44 191 23 68 59 49 70 2 2 68 55 29 70 6 27 -0.95 -168 0 0 69 35 36 19 1 6.1 44 192 24 69 4 41 70 6 46 69 0 22 70 11 10 -0.95 -167 0 0 69 40 9 19 1 7.4 44 194 24 69 9 19 70 11 15 69 5 0 70 15 39 -0.95 -166 0 0 69 44 28 19 1 8.8 43 195 24 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31 21 58 10 39 59 36 44 -0.98 - 76 0 0 58 30 23 19 2 51.3 14 293 42 57 52 46 59 8 29 57 47 30 59 13 53 -0.99 - 75 0 0 58 6 56 19 2 52.1 13 294 42 57 29 11 58 45 9 57 23 55 58 50 34 -0.99 - 74 0 0 57 43 1 19 2 52.9 13 294 42 57 5 10 58 21 21 56 59 53 58 26 47 -0.99 - 73 0 0 57 18 39 19 2 53.7 12 295 42 56 40 42 57 57 6 56 35 24 58 2 33 -0.99 - 72 0 0 56 53 50 19 2 54.5 11 296 42 56 15 47 57 32 23 56 10 28 57 37 51 -1.00 - 71 0 0 56 28 34 19 2 55.2 11 297 42 55 50 25 57 7 13 55 45 6 57 12 42 -1.00 - 70 0 0 56 2 52 19 2 55.9 10 298 42 55 24 37 56 41 36 55 19 17 56 47 6 -1.01 - 69 0 0 55 36 43 19 2 56.6 9 299 42 54 58 24 56 15 33 54 53 3 56 21 3 -1.01 - 68 0 0 55 10 8 19 2 57.2 9 300 42 54 31 44 55 49 2 54 26 23 55 54 33 -1.02 - 67 0 0 54 43 7 19 2 57.7 8 300 42 54 4 39 55 22 6 53 59 17 55 27 37 -1.02 - 66 0 0 54 15 41 19 2 58.3 7 301 41 53 37 10 54 54 44 53 31 47 55 0 16 -1.03 - 65 0 0 53 47 51 19 2 58.8 6 302 41 53 9 16 54 26 57 53 3 53 54 32 29 -1.04 - 64 0 0 53 19 36 19 2 59.2 6 303 41 52 40 58 53 58 45 52 35 35 54 4 18 -1.06 - 63 0 0 52 50 57 19 2 59.6 5 304 41 52 12 17 53 30 9 52 6 53 53 35 42 -1.08 - 62 0 0 52 21 56 19 2 59.9 4 305 40 51 43 14 53 1 10 51 37 50 53 6 43 -1.10 - 61 0 0 51 52 32 19 3 0.2 3 305 40 51 13 48 52 31 47 51 8 24 52 37 21 -1.14 - 60 0 0 51 22 46 19 3 0.4 2 306 40 50 44 2 52 2 3 50 38 37 52 7 37 -1.21 - 59 0 0 50 52 40 19 3 0.6 2 307 40 50 13 55 51 31 57 50 8 30 51 37 31 -1.34 - 58 0 0 50 22 13 19 3 0.7 1 308 39 49 43 28 51 1 31 49 38 3 51 7 5 -1.73 - 57 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 50 30 45 .. .. .. 50 36 19 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jun 15.2 Data for the target star ------------------------ * name: TYC 1816-01454-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 20 53.9484 DE: +23 40 07.408 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 20 53.9485 DE: +23 40 07.409 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (160) Una asteroid class: approx. diameter [km]: 82 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.72830 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 date of fit: 2023 Feb 11 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): 0.011", 0.003", 77.205° remarks: * orbital elements for (160)Una : Mean anomaly = 348.4811394937 deg Arg. of pericenter = 50.2552418060 deg Long. of node = 8.5788147527 deg Inclination = 3.8206188302 deg Eccentricity = 0.0667887602 Semimajor axis = 2.7293860379 AU Perihelion dist = 2.5470937283 AU Mag: H = 9.15, G = 0.15 Epoch of elements : MJD 60165.79187500 TDT (2023 Aug 09.7919) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Feb11,2.90,2023,8,9,19.004526,-0.155352,0.666177,15.499908,3.611460,-0.005075,-0.000774,-0.000001,0.000000 -177.5053,23.7246,-103.68,15.76,False TYC 1816-01454-1,4.34831895,23.6687245,0.00,11.31,0.00,0.0,0,,4.37167293,23.7246133,3.17,0.00,0,0,0 160,Una,14.42,81.800,2.7283,0,0,3.639,11.64,,4.8,0 0,348.3081,2023,8,9,50.2552,8.5788,3.8206,0.06679,2.72939,2.54709,9.15,5.0,0.15 1.070,0.0107,0.0029,77,0.0029,Known errors,-1.00,-1,-1,-1 20230809_1454-1,60110.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jun 15, 05:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org