IOTA/IOTA-ES occultation update for (2336) Xinjiang / UCAC4 335-165878 event on 2024 May 16, 21:28 UT Visible from Summary ------- On 2024 May 16 UT, the 21.8753854259422 km diameter asteroid (2336) Xinjiang will occult a 11.0 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.74 mag to 17.71 mag (the magnitude of the asteroid) for at most 2.740 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 May 16, 21:19 - 2024 May 16, 21:38 * geocentric midpoint of event [JD]: 2460447.39505479 * magnitude of target star: 10.97 * magnitude drop [mag]: 6.74 * estimated maximum duration [s]: 2.740 * Moon: 63 % sunlit, 116° distance * Sun: 140° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 90°) * approx speed of asteroid's shadow [km/s]: 8.0625 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 335-165878 by 2336 Xinjiang on 2024 May 16 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 4 0 0 33 7 13 21 38 19.0 0 118 -30 .. .. .. 32 57 37 .. .. .. 32 52 24 .... 5 0 0 32 40 29 21 38 18.9 1 119 -31 32 50 5 32 30 55 32 55 19 32 25 44 -0.31 6 0 0 32 14 6 21 38 18.4 2 119 -32 32 23 39 32 4 34 32 28 52 31 59 24 -0.65 7 0 0 31 48 4 21 38 17.7 3 120 -33 31 57 35 31 38 34 32 2 47 31 33 25 -0.77 8 0 0 31 22 23 21 38 16.6 4 120 -33 31 31 52 31 12 56 31 37 3 31 7 48 -0.83 9 0 0 30 57 5 21 38 15.3 5 121 -34 31 6 32 30 47 41 31 11 41 30 42 34 -0.86 10 0 0 30 32 11 21 38 13.6 6 121 -35 30 41 35 30 22 48 30 46 43 30 17 42 -0.88 11 0 0 30 7 39 21 38 11.7 7 122 -36 30 17 1 29 58 19 30 22 8 29 53 14 -0.90 12 0 0 29 43 32 21 38 9.4 8 122 -36 29 52 52 29 34 14 29 57 58 29 29 11 -0.91 13 0 0 29 19 50 21 38 6.9 9 123 -37 29 29 8 29 10 34 29 34 12 29 5 32 -0.92 14 0 0 28 56 33 21 38 4.0 9 123 -38 29 5 49 28 47 19 29 10 52 28 42 18 -0.93 15 0 0 28 33 42 21 38 0.9 10 124 -39 28 42 55 28 24 30 28 47 57 28 19 30 -0.94 16 0 0 28 11 16 21 37 57.5 11 124 -39 28 20 28 28 2 7 28 25 29 27 57 8 -0.94 17 0 0 27 49 18 21 37 53.8 12 125 -40 27 58 27 27 40 10 28 3 27 27 35 12 -0.95 18 0 0 27 27 46 21 37 49.8 13 125 -41 27 36 53 27 18 40 27 41 52 27 13 44 -0.95 19 0 0 27 6 42 21 37 45.5 14 126 -41 27 15 47 26 57 38 27 20 44 26 52 42 -0.95 20 0 0 26 46 5 21 37 41.0 15 126 -42 26 55 8 26 37 3 27 0 5 26 32 9 -0.96 21 0 0 26 25 56 21 37 36.2 16 127 -42 26 34 57 26 16 56 26 39 53 26 12 3 -0.96 22 0 0 26 6 16 21 37 31.1 17 127 -43 26 15 15 25 57 18 26 20 10 25 52 25 -0.96 23 0 0 25 47 4 21 37 25.8 18 128 -44 25 56 1 25 38 7 26 0 55 25 33 16 -0.96 24 0 0 25 28 20 21 37 20.2 19 128 -44 25 37 16 25 19 26 25 42 9 25 14 36 -0.96 25 0 0 25 10 6 21 37 14.3 19 129 -45 25 19 0 25 1 14 25 23 52 24 56 24 -0.96 26 0 0 24 52 22 21 37 8.2 20 129 -45 25 1 14 24 43 31 25 6 4 24 38 42 -0.97 27 0 0 24 35 6 21 37 1.9 21 130 -45 24 43 57 24 26 17 24 48 47 24 21 29 -0.97 28 0 0 24 18 21 21 36 55.3 22 130 -46 24 27 10 24 9 33 24 31 58 24 4 46 -0.97 29 0 0 24 2 5 21 36 48.5 23 131 -46 24 10 52 23 53 19 24 15 40 23 48 33 -0.97 30 0 0 23 46 19 21 36 41.4 24 131 -47 23 55 5 23 37 35 23 59 52 23 32 49 -0.97 31 0 0 23 31 4 21 36 34.1 25 132 -47 23 39 48 23 22 20 23 44 34 23 17 36 -0.97 32 0 0 23 16 18 21 36 26.6 25 133 -47 23 25 1 23 7 37 23 29 47 23 2 53 -0.97 33 0 0 23 2 4 21 36 18.9 26 133 -48 23 10 45 22 53 23 23 15 30 22 48 41 -0.97 34 0 0 22 48 19 21 36 11.0 27 134 -48 22 56 59 22 39 40 23 1 43 22 34 58 -0.97 35 0 0 22 35 6 21 36 2.8 28 134 -48 22 43 45 22 26 28 22 48 28 22 21 47 -0.97 36 0 0 22 22 23 21 35 54.5 29 135 -48 22 31 1 22 13 47 22 35 43 22 9 6 -0.97 37 0 0 22 10 11 21 35 46.0 29 136 -49 22 18 47 22 1 36 22 23 29 21 56 56 -0.97 38 0 0 21 58 30 21 35 37.2 30 136 -49 22 7 5 21 49 56 22 11 46 21 45 17 -0.97 39 0 0 21 47 20 21 35 28.3 31 137 -49 21 55 54 21 38 47 22 0 35 21 34 8 -0.97 40 0 0 21 36 41 21 35 19.2 32 138 -49 21 45 14 21 28 9 21 49 54 21 23 31 -0.97 41 0 0 21 26 33 21 35 9.9 32 138 -49 21 35 5 21 18 2 21 39 44 21 13 24 -0.97 42 0 0 21 16 56 21 35 0.5 33 139 -49 21 25 27 21 8 26 21 30 6 21 3 49 -0.97 43 0 0 21 7 50 21 34 50.8 34 140 -49 21 16 21 20 59 21 21 20 59 20 54 45 -0.97 44 0 0 20 59 16 21 34 41.0 34 141 -49 21 7 45 20 50 48 21 12 23 20 46 12 -0.97 45 0 0 20 51 13 21 34 31.1 35 141 -49 20 59 41 20 42 46 21 4 19 20 38 10 -0.97 46 0 0 20 43 41 21 34 21.0 36 142 -49 20 52 9 20 35 14 20 56 46 20 30 39 -0.97 47 0 0 20 36 40 21 34 10.8 36 143 -49 20 45 7 20 28 14 20 49 44 20 23 39 -0.97 48 0 0 20 30 11 21 34 0.4 37 144 -48 20 38 37 20 21 46 20 43 13 20 17 11 -0.97 49 0 0 20 24 13 21 33 49.8 38 145 -48 20 32 38 20 15 48 20 37 14 20 11 14 -0.97 50 0 0 20 18 46 21 33 39.2 38 145 -48 20 27 11 20 10 22 20 31 46 20 5 48 -0.97 51 0 0 20 13 50 21 33 28.4 39 146 -48 20 22 14 20 5 26 20 26 50 20 0 53 -0.97 52 0 0 20 9 25 21 33 17.5 39 147 -47 20 17 49 20 1 2 20 22 25 19 56 29 -0.97 53 0 0 20 5 32 21 33 6.5 40 148 -47 20 13 56 19 57 10 20 18 31 19 52 36 -0.97 54 0 0 20 2 10 21 32 55.3 40 149 -47 20 10 33 19 53 48 20 15 8 19 49 15 -0.97 55 0 0 19 59 19 21 32 44.1 41 150 -47 20 7 42 19 50 57 20 12 17 19 46 24 -0.97 56 0 0 19 56 59 21 32 32.7 41 151 -46 20 5 22 19 48 38 20 9 57 19 44 5 -0.97 57 0 0 19 55 11 21 32 21.3 42 152 -46 20 3 33 19 46 49 20 8 8 19 42 17 -0.97 58 0 0 19 53 54 21 32 9.7 42 153 -45 20 2 16 19 45 32 20 6 50 19 41 0 -0.97 59 0 0 19 53 7 21 31 58.1 43 154 -45 20 1 30 19 44 46 20 6 4 19 40 14 -0.97 60 0 0 19 52 52 21 31 46.4 43 155 -44 20 1 15 19 44 31 20 5 49 19 39 59 -0.97 61 0 0 19 53 8 21 31 34.6 43 156 -44 20 1 31 19 44 48 20 6 5 19 40 15 -0.97 62 0 0 19 53 55 21 31 22.7 44 157 -43 20 2 18 19 45 35 20 6 52 19 41 2 -0.97 63 0 0 19 55 13 21 31 10.8 44 159 -43 20 3 36 19 46 52 20 8 10 19 42 20 -0.97 64 0 0 19 57 2 21 30 58.8 44 160 -42 20 5 25 19 48 41 20 9 59 19 44 9 -0.97 65 0 0 19 59 22 21 30 46.7 45 161 -42 20 7 45 19 51 1 20 12 19 19 46 28 -0.97 66 0 0 20 2 13 21 30 34.6 45 162 -41 20 10 36 19 53 51 20 15 10 19 49 19 -0.97 67 0 0 20 5 35 21 30 22.4 45 163 -41 20 13 58 19 57 13 20 18 32 19 52 40 -0.97 68 0 0 20 9 27 21 30 10.2 45 164 -40 20 17 50 20 1 5 20 22 25 19 56 32 -0.97 69 0 0 20 13 50 21 29 58.0 45 166 -39 20 22 14 20 5 28 20 26 49 20 0 54 -0.97 70 0 0 20 18 44 21 29 45.7 46 167 -39 20 27 8 20 10 21 20 31 43 20 5 47 -0.97 71 0 0 20 24 8 21 29 33.4 46 168 -38 20 32 33 20 15 45 20 37 8 20 11 11 -0.97 72 0 0 20 30 3 21 29 21.1 46 169 -37 20 38 28 20 21 39 20 43 4 20 17 5 -0.97 73 0 0 20 36 28 21 29 8.7 46 171 -37 20 44 54 20 28 4 20 49 30 20 23 30 -0.97 74 0 0 20 43 24 21 28 56.4 46 172 -36 20 51 50 20 34 59 20 56 27 20 30 25 -0.97 75 0 0 20 50 50 21 28 44.0 46 173 -35 20 59 17 20 42 25 21 3 54 20 37 50 -0.97 76 0 0 20 58 47 21 28 31.6 46 174 -35 21 7 14 20 50 21 21 11 51 20 45 45 -0.97 77 0 0 21 7 14 21 28 19.3 46 176 -34 21 15 42 20 58 47 21 20 19 20 54 11 -0.97 78 0 0 21 16 10 21 28 6.9 46 177 -33 21 24 39 21 7 43 21 29 17 21 3 7 -0.97 79 0 0 21 25 37 21 27 54.6 45 178 -32 21 34 7 21 17 9 21 38 45 21 12 32 -0.98 80 0 0 21 35 34 21 27 42.3 45 179 -31 21 44 5 21 27 5 21 48 44 21 22 28 -0.98 81 0 0 21 46 1 21 27 30.0 45 181 -31 21 54 33 21 37 30 21 59 12 21 32 53 -0.98 82 0 0 21 56 57 21 27 17.7 45 182 -30 22 5 30 21 48 26 22 10 10 21 43 48 -0.98 83 0 0 22 8 23 21 27 5.5 45 183 -29 22 16 57 21 59 51 22 21 37 21 55 12 -0.98 84 0 0 22 20 19 21 26 53.3 44 184 -28 22 28 54 22 11 45 22 33 35 22 7 6 -0.98 85 0 0 22 32 44 21 26 41.2 44 185 -28 22 41 20 22 24 9 22 46 1 22 19 29 -0.98 86 0 0 22 45 38 21 26 29.1 44 187 -27 22 54 15 22 37 2 22 58 58 22 32 22 -0.98 87 0 0 22 59 2 21 26 17.0 44 188 -26 23 7 40 22 50 25 23 12 23 22 45 44 -0.98 88 0 0 23 12 54 21 26 5.1 43 189 -25 23 21 34 23 4 16 23 26 17 22 59 34 -0.98 89 0 0 23 27 16 21 25 53.2 43 190 -24 23 35 56 23 18 36 23 40 41 23 13 54 -0.98 90 0 0 23 42 6 21 25 41.4 42 191 -23 23 50 48 23 33 25 23 55 33 23 28 42 -0.98 91 0 0 23 57 24 21 25 29.6 42 192 -22 24 6 8 23 48 42 24 10 53 23 43 58 -0.98 92 0 0 24 13 11 21 25 18.0 42 193 -22 24 21 56 24 4 27 24 26 42 23 59 43 -0.98 93 0 0 24 29 26 21 25 6.4 41 195 -21 24 38 12 24 20 41 24 43 0 24 15 55 -0.98 94 0 0 24 46 9 21 24 55.0 41 196 -20 24 54 57 24 37 22 24 59 45 24 32 36 -0.99 95 0 0 25 3 20 21 24 43.7 40 197 -19 25 12 9 24 54 31 25 16 58 24 49 44 -0.99 96 0 0 25 20 58 21 24 32.4 40 198 -18 25 29 49 25 12 8 25 34 39 25 7 20 -0.99 97 0 0 25 39 3 21 24 21.3 39 199 -17 25 47 56 25 30 12 25 52 47 25 25 23 -0.99 98 0 0 25 57 35 21 24 10.3 38 200 -16 26 6 30 25 48 42 26 11 22 25 43 53 -0.99 99 0 0 26 16 34 21 23 59.5 38 201 -15 26 25 31 26 7 40 26 30 23 26 2 49 -0.99 100 0 0 26 36 0 21 23 48.7 37 202 -15 26 44 58 26 27 4 26 49 52 26 22 12 -0.99 101 0 0 26 55 52 21 23 38.1 37 202 -14 27 4 51 26 46 54 27 9 46 26 42 1 -0.99 102 0 0 27 16 9 21 23 27.7 36 203 -13 27 25 11 27 7 9 27 30 7 27 2 16 -0.99 103 0 0 27 36 53 21 23 17.4 35 204 -12 27 45 56 27 27 51 27 50 53 27 22 56 -0.99 104 0 0 27 58 1 21 23 7.3 35 205 -11 28 7 6 27 48 57 28 12 4 27 44 2 -0.99 105 0 0 28 19 34 21 22 57.4 34 206 -10 28 28 42 28 10 29 28 33 40 28 5 32 -1.00 106 0 0 28 41 32 21 22 47.6 33 207 -9 28 50 41 28 32 24 28 55 41 28 27 27 -1.00 107 0 0 29 3 53 21 22 38.0 32 208 -8 29 13 5 28 54 44 29 18 5 28 49 45 -1.00 108 0 0 29 26 38 21 22 28.6 32 209 -7 29 35 52 29 17 27 29 40 54 29 12 27 -1.00 109 0 0 29 49 47 21 22 19.3 31 209 -6 29 59 2 29 40 33 30 4 5 29 35 32 -1.00 110 0 0 30 13 18 21 22 10.3 30 210 -5 30 22 35 30 4 2 30 27 39 29 59 0 -1.00 111 0 0 30 37 11 21 22 1.5 30 211 -4 30 46 30 30 27 53 30 51 35 30 22 50 -1.00 112 0 0 31 1 26 21 21 52.8 29 212 -4 31 10 47 30 52 6 31 15 54 30 47 2 -1.00 113 0 0 31 26 2 21 21 44.4 28 212 -3 31 35 25 31 16 40 31 40 33 31 11 34 -1.00 114 0 0 31 50 58 21 21 36.2 27 213 -2 32 0 24 31 41 34 32 5 33 31 36 28 -1.00 115 0 0 32 16 15 21 21 28.2 26 214 -1 32 25 43 32 6 49 32 30 53 32 1 41 -1.01 116 0 0 32 41 51 21 21 20.5 26 215 0 32 51 21 32 32 23 32 56 32 32 27 14 -1.01 117 0 0 33 7 46 21 21 13.0 25 215 1 33 17 18 32 58 16 33 22 30 32 53 6 -1.01 118 0 0 33 33 59 21 21 5.7 24 216 2 33 43 33 33 24 27 33 48 47 33 19 15 -1.01 119 0 0 34 0 30 21 20 58.6 23 217 3 34 10 6 33 50 55 34 15 21 33 45 43 -1.01 120 0 0 34 27 17 21 20 51.8 22 218 4 34 36 56 34 17 40 34 42 12 34 12 27 -1.01 121 0 0 34 54 21 21 20 45.3 21 218 5 35 4 2 34 44 42 35 9 19 34 39 27 -1.01 122 0 0 35 21 40 21 20 39.0 21 219 6 35 31 23 35 11 59 35 36 41 35 6 43 -1.01 123 0 0 35 49 13 21 20 32.9 20 220 7 35 58 58 35 39 30 36 4 18 35 34 13 -1.01 124 0 0 36 17 1 21 20 27.1 19 220 7 36 26 48 36 7 15 36 32 8 36 1 57 -1.01 125 0 0 36 45 1 21 20 21.6 18 221 8 36 54 50 36 35 14 37 0 12 36 29 54 -1.02 126 0 0 37 13 13 21 20 16.4 17 222 9 37 23 5 37 3 24 37 28 28 36 58 4 -1.02 127 0 0 37 41 37 21 20 11.4 16 222 10 37 51 31 37 31 46 37 56 55 37 26 24 -1.02 128 0 0 38 10 12 21 20 6.6 15 223 11 38 20 7 38 0 18 38 25 32 37 54 56 -1.02 129 0 0 38 38 56 21 20 2.2 14 224 12 38 48 53 38 29 0 38 54 19 38 23 37 -1.02 130 0 0 39 7 48 21 19 58.0 14 224 13 39 17 48 38 57 51 39 23 15 38 52 26 -1.02 131 0 0 39 36 48 21 19 54.0 13 225 14 39 46 50 39 26 49 39 52 18 39 21 23 -1.02 132 0 0 40 5 55 21 19 50.4 12 226 14 40 15 59 39 55 54 40 21 28 39 50 28 -1.02 133 0 0 40 35 8 21 19 47.0 11 226 15 40 45 13 40 25 5 40 50 44 40 19 38 -1.03 134 0 0 41 4 26 21 19 43.9 10 227 16 41 14 33 40 54 21 41 20 4 40 48 52 -1.03 135 0 0 41 33 47 21 19 41.1 9 228 17 41 43 56 41 23 41 41 49 28 41 18 11 -1.03 136 0 0 42 3 11 21 19 38.5 8 228 18 42 13 21 41 53 3 42 18 55 41 47 33 -1.03 137 0 0 42 32 37 21 19 36.2 7 229 19 42 42 49 42 22 28 42 48 23 42 16 56 -1.03 138 0 0 43 2 4 21 19 34.2 7 230 19 43 12 17 42 51 53 43 17 52 42 46 21 -1.04 139 0 0 43 31 31 21 19 32.4 6 230 20 43 41 45 43 21 18 43 47 21 43 15 45 -1.04 140 0 0 44 0 56 21 19 30.9 5 231 21 44 11 12 43 50 42 44 16 48 43 45 8 -1.05 141 0 0 44 30 19 21 19 29.7 4 232 22 44 40 36 44 20 4 44 46 13 44 14 29 -1.06 142 0 0 44 59 39 21 19 28.7 3 232 22 45 9 57 44 49 22 45 15 35 44 43 47 -1.07 143 0 0 45 28 54 21 19 27.9 2 233 23 45 39 14 45 18 36 45 44 52 45 13 1 -1.09 144 0 0 45 58 4 21 19 27.4 1 234 24 46 8 25 45 47 46 46 14 4 45 42 10 -1.14 145 0 0 46 27 8 21 19 27.2 1 235 25 46 37 30 46 16 48 46 43 9 46 11 12 -1.34 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 335-165878 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 28 27.9542 DE: -23 11 52.278 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 28 27.9542 DE: -23 11 52.278 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.0 * B mag [mag]: 12.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2336) Xinjiang asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.72470 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.019", 0.001", 90.1° remarks: * orbital elements for (2336)Xinjiang : Mean anomaly = 129.0460846155 deg Arg. of pericenter = 36.9517901388 deg Long. of node = 87.2071484673 deg Inclination = 2.7871562779 deg Eccentricity = 0.1625635265 Semimajor axis = 3.1860781339 AU Perihelion dist = 2.6681380367 AU Mag: H = 12.11, G = 0.15 Epoch of elements : MJD 60446.89505508 TDT (2024 May 16.8951) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,2.74,2024,5,16,21.481315,-0.096063,0.690086,-4.507223,-0.627489,-0.003696,-0.000199,0.000001,0.000000 80.1883,-23.1829,-143.11,19.37,False UCAC4 335-165878,18.47443172,-23.1978550,12.13,10.97,10.34,0.1,0,,18.49931297,-23.1828677,6.75,6.92,0,0,0 2336,Xinjiang,17.71,22.073,2.7247,0,0,-1.055,-2.03,,1.8,0 0,128.8910,2024,5,16,36.9518,87.2071,2.7872,0.16256,3.18608,2.66814,12.11,5.0,0.15 1.272,0.0193,0.0014,90,0.0031,Known errors,0.80,0,-1,-1 20240516_165878,60139.34 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 08:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org