IOTA/IOTA-ES occultation update for (2051) Chang / UCAC4 535-005099 event on 2024 Aug 10, 20:56 UT Visible from Summary ------- On 2024 Aug 10 UT, the 15.752 km diameter asteroid (2051) Chang will occult a 11.6 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.27 mag to 16.81 mag (the magnitude of the asteroid) for at most 0.990 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 Aug 10, 20:49 - 2024 Aug 10, 21:03 * geocentric midpoint of event [JD]: 2460533.37239888 * magnitude of target star: 11.55 * magnitude drop [mag]: 5.27 * estimated maximum duration [s]: 0.990 * Moon: 33 % sunlit, 162° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 74°) * approx speed of asteroid's shadow [km/s]: 15.9857 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 535-005099 by 2051 Chang on 2024 Aug 10 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 46 0 0 -15 20 10 20 49 36.6 0 72 -87 -15 24 39 -15 15 41 .. .. .. -15 14 1 .... 47 0 0 -15 1 34 20 49 36.7 1 72 -88 -15 6 3 -14 57 4 -15 7 43 -14 55 24 -0.11 48 0 0 -14 42 38 20 49 36.9 2 72 -88 -14 47 8 -14 38 9 -14 48 48 -14 36 28 -0.06 49 0 0 -14 23 24 20 49 37.2 3 72 -89 -14 27 54 -14 18 54 -14 29 34 -14 17 13 -0.04 50 0 0 -14 3 51 20 49 37.6 4 71 -88 -14 8 21 -13 59 20 -14 10 2 -13 57 40 -0.03 51 0 0 -13 43 59 20 49 38.2 5 71 -87 -13 48 30 -13 39 28 -13 50 10 -13 37 47 -0.03 52 0 0 -13 23 49 20 49 38.9 6 71 -86 -13 28 20 -13 19 18 -13 30 1 -13 17 37 -0.02 53 0 0 -13 3 21 20 49 39.7 7 71 -85 -13 7 52 -12 58 49 -13 9 33 -12 57 8 -0.02 54 0 0 -12 42 35 20 49 40.7 8 70 -84 -12 47 7 -12 38 3 -12 48 48 -12 36 22 -0.02 55 0 0 -12 21 32 20 49 41.8 9 70 -83 -12 26 5 -12 17 0 -12 27 46 -12 15 19 -0.02 56 0 0 -12 0 12 20 49 43.0 10 70 -82 -12 4 45 -11 55 40 -12 6 27 -11 53 58 -0.02 57 0 0 -11 38 36 20 49 44.4 11 70 -81 -11 43 9 -11 34 3 -11 44 51 -11 32 21 -0.01 58 0 0 -11 16 43 20 49 45.9 12 70 -80 -11 21 16 -11 12 9 -11 22 58 -11 10 28 -0.01 59 0 0 -10 54 34 20 49 47.5 13 69 -79 -10 59 8 -10 50 0 -11 0 50 -10 48 18 -0.01 60 0 0 -10 32 10 20 49 49.3 15 69 -78 -10 36 44 -10 27 36 -10 38 26 -10 25 54 -0.01 61 0 0 -10 9 30 20 49 51.2 16 69 -77 -10 14 5 -10 4 56 -10 15 47 -10 3 14 -0.01 62 0 0 - 9 46 36 20 49 53.3 17 69 -76 - 9 51 11 - 9 42 1 - 9 52 53 - 9 40 19 -0.01 63 0 0 - 9 23 28 20 49 55.5 18 69 -75 - 9 28 3 - 9 18 53 - 9 29 45 - 9 17 10 -0.01 64 0 0 - 9 0 6 20 49 57.8 19 69 -74 - 9 4 41 - 8 55 30 - 9 6 24 - 8 53 48 -0.01 65 0 0 - 8 36 30 20 50 0.3 20 68 -73 - 8 41 6 - 8 31 54 - 8 42 48 - 8 30 12 -0.01 66 0 0 - 8 12 42 20 50 2.9 21 68 -72 - 8 17 18 - 8 8 6 - 8 19 0 - 8 6 23 -0.01 67 0 0 - 7 48 41 20 50 5.6 22 68 -71 - 7 53 17 - 7 44 5 - 7 55 0 - 7 42 22 -0.01 68 0 0 - 7 24 28 20 50 8.5 23 68 -70 - 7 29 5 - 7 19 52 - 7 30 48 - 7 18 9 -0.01 69 0 0 - 7 0 4 20 50 11.5 24 68 -69 - 7 4 41 - 6 55 28 - 7 6 24 - 6 53 45 -0.01 70 0 0 - 6 35 30 20 50 14.7 25 68 -67 - 6 40 7 - 6 30 53 - 6 41 50 - 6 29 10 -0.01 71 0 0 - 6 10 45 20 50 18.0 26 68 -66 - 6 15 22 - 6 6 8 - 6 17 6 - 6 4 24 -0.01 72 0 0 - 5 45 51 20 50 21.4 27 68 -65 - 5 50 28 - 5 41 13 - 5 52 12 - 5 39 30 -0.01 73 0 0 - 5 20 47 20 50 25.0 29 67 -64 - 5 25 25 - 5 16 9 - 5 27 8 - 5 14 26 -0.01 74 0 0 - 4 55 35 20 50 28.7 30 67 -63 - 5 0 13 - 4 50 57 - 5 1 57 - 4 49 14 -0.01 75 0 0 - 4 30 15 20 50 32.5 31 67 -62 - 4 34 54 - 4 25 37 - 4 36 37 - 4 23 54 -0.01 76 0 0 - 4 4 48 20 50 36.5 32 67 -61 - 4 9 27 - 4 0 10 - 4 11 10 - 3 58 26 -0.01 77 0 0 - 3 39 15 20 50 40.6 33 67 -60 - 3 43 53 - 3 34 36 - 3 45 37 - 3 32 52 -0.01 78 0 0 - 3 13 35 20 50 44.8 34 67 -59 - 3 18 14 - 3 8 56 - 3 19 57 - 3 7 13 -0.01 79 0 0 - 2 47 50 20 50 49.2 35 67 -58 - 2 52 29 - 2 43 11 - 2 54 13 - 2 41 28 -0.01 80 0 0 - 2 22 1 20 50 53.7 36 67 -56 - 2 26 40 - 2 17 22 - 2 28 23 - 2 15 38 -0.01 81 0 0 - 1 56 7 20 50 58.3 37 67 -55 - 2 0 46 - 1 51 28 - 2 2 30 - 1 49 44 -0.01 82 0 0 - 1 30 10 20 51 3.0 38 67 -54 - 1 34 49 - 1 25 31 - 1 36 33 - 1 23 47 -0.01 83 0 0 - 1 4 11 20 51 7.8 40 67 -53 - 1 8 50 - 0 59 31 - 1 10 34 - 0 57 48 -0.01 84 0 0 - 0 38 9 20 51 12.8 41 67 -52 - 0 42 48 - 0 33 30 - 0 44 32 - 0 31 46 -0.01 85 0 0 - 0 12 7 20 51 17.9 42 67 -51 - 0 16 46 - 0 7 27 - 0 18 30 - 0 5 43 -0.01 86 0 0 0 13 57 20 51 23.1 43 67 -50 0 9 18 0 18 36 0 7 34 0 20 20 -0.01 87 0 0 0 40 0 20 51 28.4 44 67 -49 0 35 21 0 44 39 0 33 37 0 46 23 -0.01 88 0 0 1 6 2 20 51 33.8 45 67 -48 1 1 23 1 10 42 0 59 39 1 12 25 -0.01 89 0 0 1 32 3 20 51 39.4 46 67 -47 1 27 24 1 36 42 1 25 40 1 38 26 0.00 90 0 0 1 58 2 20 51 45.0 47 67 -45 1 53 23 2 2 41 1 51 39 2 4 25 0.00 91 0 0 2 23 58 20 51 50.7 48 67 -44 2 19 19 2 28 37 2 17 35 2 30 20 0.00 92 0 0 2 49 50 20 51 56.5 50 67 -43 2 45 11 2 54 29 2 43 27 2 56 13 0.00 93 0 0 3 15 38 20 52 2.5 51 67 -42 3 10 59 3 20 17 3 9 15 3 22 0 0.00 94 0 0 3 41 21 20 52 8.5 52 67 -41 3 36 42 3 45 59 3 34 58 3 47 43 0.00 95 0 0 4 6 58 20 52 14.6 53 67 -40 4 2 20 4 11 37 4 0 36 4 13 20 0.00 96 0 0 4 32 29 20 52 20.8 54 67 -39 4 27 51 4 37 7 4 26 7 4 38 51 0.00 97 0 0 4 57 53 20 52 27.0 55 67 -38 4 53 15 5 2 31 4 51 31 5 4 15 0.00 98 0 0 5 23 10 20 52 33.4 56 67 -37 5 18 32 5 27 48 5 16 48 5 29 31 0.00 99 0 0 5 48 18 20 52 39.8 57 67 -35 5 43 40 5 52 56 5 41 57 5 54 39 0.00 100 0 0 6 13 17 20 52 46.3 58 67 -34 6 8 39 6 17 55 6 6 56 6 19 38 0.00 101 0 0 6 38 7 20 52 52.9 59 68 -33 6 33 29 6 42 44 6 31 46 6 44 27 0.00 102 0 0 7 2 46 20 52 59.5 61 68 -32 6 58 9 7 7 23 6 56 26 7 9 6 0.00 103 0 0 7 27 15 20 53 6.2 62 68 -31 7 22 38 7 31 52 7 20 55 7 33 35 0.00 104 0 0 7 51 32 20 53 12.9 63 68 -30 7 46 56 7 56 9 7 45 13 7 57 52 0.00 105 0 0 8 15 38 20 53 19.8 64 68 -29 8 11 2 8 20 14 8 9 19 8 21 57 0.00 106 0 0 8 39 31 20 53 26.6 65 68 -28 8 34 55 8 44 7 8 33 12 8 45 49 0.00 107 0 0 9 3 11 20 53 33.5 66 68 -27 8 58 35 9 7 46 8 56 53 9 9 29 0.00 108 0 0 9 26 37 20 53 40.5 67 68 -26 9 22 2 9 31 12 9 20 19 9 32 55 0.00 109 0 0 9 49 49 20 53 47.5 68 69 -24 9 45 14 9 54 24 9 43 32 9 56 6 0.00 110 0 0 10 12 47 20 53 54.5 69 69 -23 10 8 12 10 17 21 10 6 30 10 19 3 0.00 111 0 0 10 35 29 20 54 1.5 70 69 -22 10 30 55 10 40 3 10 29 13 10 41 45 0.00 112 0 0 10 57 56 20 54 8.6 71 69 -21 10 53 22 11 2 30 10 51 40 11 4 12 0.00 113 0 0 11 20 6 20 54 15.8 73 69 -20 11 15 33 11 24 40 11 13 51 11 26 22 0.00 114 0 0 11 42 1 20 54 22.9 74 69 -19 11 37 27 11 46 34 11 35 46 11 48 15 0.00 115 0 0 12 3 38 20 54 30.1 75 69 -18 11 59 5 12 8 10 11 57 24 12 9 52 0.00 116 0 0 12 24 57 20 54 37.3 76 70 -17 12 20 25 12 29 30 12 18 44 12 31 11 0.00 117 0 0 12 45 59 20 54 44.5 77 70 -16 12 41 28 12 50 31 12 39 46 12 52 12 0.00 118 0 0 13 6 43 20 54 51.7 78 70 -15 13 2 12 13 11 15 13 0 31 13 12 56 0.00 119 0 0 13 27 8 20 54 58.9 79 70 -14 13 22 37 13 31 40 13 20 57 13 33 20 0.00 120 0 0 13 47 15 20 55 6.1 80 70 -13 13 42 44 13 51 46 13 41 3 13 53 26 0.00 121 0 0 14 7 2 20 55 13.3 81 70 -12 14 2 32 14 11 32 14 0 51 14 13 13 0.00 122 0 0 14 26 30 20 55 20.6 82 70 -11 14 22 0 14 30 59 14 20 19 14 32 40 0.00 123 0 0 14 45 37 20 55 27.8 83 70 -10 14 41 8 14 50 7 14 39 28 14 51 47 0.00 124 0 0 15 4 25 20 55 35.0 84 70 -9 14 59 56 15 8 54 14 58 16 15 10 34 0.00 125 0 0 15 22 52 20 55 42.2 85 69 -7 15 18 23 15 27 20 15 16 43 15 29 0 0.00 126 0 0 15 40 58 20 55 49.4 86 69 -6 15 36 30 15 45 26 15 34 50 15 47 6 0.01 127 0 0 15 58 44 20 55 56.6 87 67 -5 15 54 16 16 3 11 15 52 36 16 4 51 0.01 128 0 0 16 16 8 20 56 3.8 88 63 -4 16 11 41 16 20 35 16 10 1 16 22 15 0.01 129 0 0 16 33 11 20 56 10.9 88 48 -3 16 28 44 16 37 38 16 27 5 16 39 17 0.01 130 0 0 16 49 52 20 56 18.1 89 295 -2 16 45 26 16 54 19 16 43 47 16 55 58 0.02 131 0 0 17 6 12 20 56 25.2 88 268 -1 17 1 46 17 10 38 17 0 7 17 12 17 0.01 132 0 0 17 22 9 20 56 32.3 87 263 0 17 17 43 17 26 35 17 16 5 17 28 13 0.01 133 0 0 17 37 44 20 56 39.3 86 261 1 17 33 19 17 42 10 17 31 41 17 43 48 0.01 134 0 0 17 52 57 20 56 46.4 85 260 2 17 48 33 17 57 22 17 46 54 17 59 1 0.01 135 0 0 18 7 48 20 56 53.4 84 259 3 18 3 23 18 12 12 18 1 45 18 13 51 0.01 136 0 0 18 22 16 20 57 0.4 83 259 4 18 17 52 18 26 40 18 16 14 18 28 18 0.01 137 0 0 18 36 21 20 57 7.3 82 259 5 18 31 57 18 40 44 18 30 19 18 42 22 0.01 138 0 0 18 50 3 20 57 14.2 81 259 6 18 45 40 18 54 26 18 44 2 18 56 4 0.01 139 0 0 19 3 22 20 57 21.1 80 259 7 18 59 0 19 7 45 18 57 22 19 9 23 0.01 140 0 0 19 16 19 20 57 27.9 79 259 8 19 11 56 19 20 41 19 10 19 19 22 19 0.01 141 0 0 19 28 52 20 57 34.7 78 260 9 19 24 30 19 33 14 19 22 52 19 34 51 0.01 142 0 0 19 41 1 20 57 41.4 77 260 10 19 36 40 19 45 23 19 35 2 19 47 1 0.01 143 0 0 19 52 48 20 57 48.1 76 260 11 19 48 27 19 57 9 19 46 49 19 58 47 0.01 144 0 0 20 4 11 20 57 54.8 75 260 12 19 59 50 20 8 32 19 58 13 20 10 9 0.01 145 0 0 20 15 11 20 58 1.4 75 261 13 20 10 50 20 19 31 20 9 13 20 21 8 0.01 146 0 0 20 25 47 20 58 7.9 74 261 14 20 21 26 20 30 7 20 19 50 20 31 44 0.01 147 0 0 20 35 59 20 58 14.4 73 261 15 20 31 39 20 40 19 20 30 3 20 41 56 0.01 148 0 0 20 45 48 20 58 20.9 72 262 16 20 41 29 20 50 8 20 39 52 20 51 45 0.01 149 0 0 20 55 14 20 58 27.3 71 262 17 20 50 54 20 59 33 20 49 18 21 1 10 0.01 150 0 0 21 4 15 20 58 33.7 70 262 18 20 59 56 21 8 35 20 58 20 21 10 11 0.01 151 0 0 21 12 53 20 58 40.0 69 263 19 21 8 34 21 17 12 21 6 58 21 18 48 0.01 152 0 0 21 21 7 20 58 46.2 68 263 19 21 16 49 21 25 26 21 15 13 21 27 2 0.01 153 0 0 21 28 58 20 58 52.4 67 263 20 21 24 39 21 33 16 21 23 3 21 34 52 0.01 154 0 0 21 36 25 20 58 58.6 66 264 21 21 32 6 21 40 43 21 30 30 21 42 19 0.01 155 0 0 21 43 28 20 59 4.6 65 264 22 21 39 10 21 47 46 21 37 34 21 49 21 0.01 156 0 0 21 50 7 20 59 10.7 64 264 23 21 45 49 21 54 24 21 44 13 21 56 0 0.01 157 0 0 21 56 22 20 59 16.6 63 265 24 21 52 4 22 0 40 21 50 29 22 2 15 0.01 158 0 0 22 2 14 20 59 22.5 62 265 25 21 57 56 22 6 31 21 56 21 22 8 7 0.01 159 0 0 22 7 41 20 59 28.4 61 265 26 22 3 24 22 11 59 22 1 49 22 13 34 0.01 160 0 0 22 12 45 20 59 34.2 60 266 27 22 8 28 22 17 2 22 6 53 22 18 38 0.01 161 0 0 22 17 26 20 59 39.9 59 266 28 22 13 9 22 21 42 22 11 33 22 23 18 0.01 162 0 0 22 21 42 20 59 45.5 58 266 29 22 17 25 22 25 59 22 15 50 22 27 34 0.01 163 0 0 22 25 35 20 59 51.1 57 267 30 22 21 18 22 29 51 22 19 43 22 31 27 0.01 164 0 0 22 29 3 20 59 56.6 56 267 31 22 24 47 22 33 20 22 23 12 22 34 55 0.01 165 0 0 22 32 9 21 0 2.1 55 268 32 22 27 52 22 36 25 22 26 17 22 38 0 0.01 166 0 0 22 34 50 21 0 7.5 54 268 33 22 30 34 22 39 6 22 28 58 22 40 41 0.01 167 0 0 22 37 8 21 0 12.8 53 268 34 22 32 51 22 41 24 22 31 16 22 42 59 0.01 168 0 0 22 39 1 21 0 18.0 52 269 35 22 34 45 22 43 18 22 33 10 22 44 53 0.01 169 0 0 22 40 32 21 0 23.2 52 269 36 22 36 16 22 44 48 22 34 40 22 46 23 0.01 170 0 0 22 41 38 21 0 28.3 51 269 37 22 37 22 22 45 54 22 35 47 22 47 30 0.01 171 0 0 22 42 21 21 0 33.4 50 270 38 22 38 5 22 46 37 22 36 30 22 48 12 0.01 172 0 0 22 42 40 21 0 38.4 49 270 38 22 38 24 22 46 56 22 36 49 22 48 32 0.01 173 0 0 22 42 36 21 0 43.2 48 271 39 22 38 20 22 46 52 22 36 45 22 48 27 0.01 174 0 0 22 42 8 21 0 48.1 47 271 40 22 37 52 22 46 24 22 36 17 22 47 59 0.01 175 0 0 22 41 16 21 0 52.8 46 271 41 22 37 0 22 45 33 22 35 25 22 47 8 0.01 176 0 0 22 40 1 21 0 57.5 45 272 42 22 35 45 22 44 17 22 34 10 22 45 53 0.01 177 0 0 22 38 23 21 1 2.1 44 272 43 22 34 7 22 42 39 22 32 31 22 44 14 0.00 178 0 0 22 36 21 21 1 6.6 43 273 44 22 32 4 22 40 37 22 30 29 22 42 12 0.00 179 0 0 22 33 55 21 1 11.1 42 273 45 22 29 39 22 38 11 22 28 3 22 39 47 0.00 180 0 0 22 31 6 21 1 15.4 41 273 46 22 26 50 22 35 22 22 25 14 22 36 58 0.00 -179 0 0 22 27 53 21 1 19.7 40 274 47 22 23 37 22 32 10 22 22 2 22 33 45 0.00 -178 0 0 22 24 18 21 1 23.9 39 274 48 22 20 1 22 28 34 22 18 25 22 30 10 0.00 -177 0 0 22 20 18 21 1 28.0 38 274 49 22 16 2 22 24 35 22 14 26 22 26 11 0.00 -176 0 0 22 15 56 21 1 32.1 37 275 50 22 11 39 22 20 13 22 10 3 22 21 48 0.00 -175 0 0 22 11 10 21 1 36.0 36 275 51 22 6 53 22 15 27 22 5 17 22 17 3 0.00 -174 0 0 22 6 1 21 1 39.9 36 276 52 22 1 44 22 10 18 22 0 8 22 11 54 0.00 -173 0 0 22 0 28 21 1 43.7 35 276 53 21 56 11 22 4 46 21 54 35 22 6 22 0.00 -172 0 0 21 54 33 21 1 47.4 34 276 54 21 50 15 21 58 51 21 48 40 22 0 26 0.00 -171 0 0 21 48 14 21 1 51.0 33 277 55 21 43 57 21 52 32 21 42 21 21 54 8 0.00 -170 0 0 21 41 33 21 1 54.6 32 277 55 21 37 15 21 45 51 21 35 39 21 47 27 0.00 -169 0 0 21 34 28 21 1 58.0 31 277 56 21 30 10 21 38 46 21 28 34 21 40 22 0.00 -168 0 0 21 27 0 21 2 1.3 30 278 57 21 22 42 21 31 19 21 21 6 21 32 55 0.00 -167 0 0 21 19 10 21 2 4.6 29 278 58 21 14 51 21 23 28 21 13 15 21 25 4 0.00 -166 0 0 21 10 56 21 2 7.8 28 279 59 21 6 37 21 15 15 21 5 1 21 16 51 0.00 -165 0 0 21 2 20 21 2 10.8 27 279 60 20 58 0 21 6 39 20 56 24 21 8 15 0.00 -164 0 0 20 53 21 21 2 13.8 26 279 61 20 49 1 20 57 40 20 47 25 20 59 17 0.00 -163 0 0 20 43 59 21 2 16.7 25 280 62 20 39 39 20 48 19 20 38 2 20 49 55 0.00 -162 0 0 20 34 14 21 2 19.5 24 280 63 20 29 54 20 38 34 20 28 18 20 40 11 0.00 -161 0 0 20 24 8 21 2 22.2 23 280 64 20 19 47 20 28 28 20 18 10 20 30 5 0.00 -160 0 0 20 13 38 21 2 24.8 22 281 65 20 9 18 20 17 59 20 7 41 20 19 36 0.00 -159 0 0 20 2 47 21 2 27.3 21 281 66 19 58 26 20 7 8 19 56 49 20 8 45 0.00 -158 0 0 19 51 33 21 2 29.7 20 281 67 19 47 11 19 55 54 19 45 34 19 57 31 0.00 -157 0 0 19 39 57 21 2 31.9 19 282 68 19 35 35 19 44 18 19 33 58 19 45 55 0.00 -156 0 0 19 27 58 21 2 34.1 18 282 69 19 23 37 19 32 20 19 21 59 19 33 58 0.00 -155 0 0 19 15 38 21 2 36.2 17 282 70 19 11 16 19 20 1 19 9 39 19 21 38 0.00 -154 0 0 19 2 57 21 2 38.2 16 283 71 18 58 34 19 7 19 18 56 56 19 8 57 0.00 -153 0 0 18 49 53 21 2 40.0 15 283 72 18 45 30 18 54 16 18 43 52 18 55 54 -0.01 -152 0 0 18 36 28 21 2 41.8 14 283 73 18 32 5 18 40 51 18 30 27 18 42 29 -0.01 -151 0 0 18 22 41 21 2 43.5 13 284 74 18 18 18 18 27 5 18 16 40 18 28 43 -0.01 -150 0 0 18 8 33 21 2 45.0 12 284 75 18 4 9 18 12 57 18 2 31 18 14 36 -0.01 -149 0 0 17 54 5 21 2 46.4 11 284 76 17 49 40 17 58 29 17 48 2 18 0 7 -0.01 -148 0 0 17 39 15 21 2 47.7 10 285 77 17 34 50 17 43 39 17 33 11 17 45 18 -0.01 -147 0 0 17 24 4 21 2 48.9 9 285 78 17 19 39 17 28 29 17 18 0 17 30 8 -0.01 -146 0 0 17 8 33 21 2 50.0 8 285 79 17 4 7 17 12 58 17 2 28 17 14 37 -0.01 -145 0 0 16 52 41 21 2 51.0 7 285 80 16 48 15 16 57 7 16 46 36 16 58 46 -0.01 -144 0 0 16 36 29 21 2 51.8 6 286 81 16 32 3 16 40 55 16 30 24 16 42 35 -0.02 -143 0 0 16 19 57 21 2 52.6 5 286 82 16 15 31 16 24 24 16 13 52 16 26 3 -0.02 -142 0 0 16 3 6 21 2 53.2 4 286 83 15 58 39 16 7 33 15 56 59 16 9 12 -0.02 -141 0 0 15 45 55 21 2 53.7 3 287 84 15 41 27 15 50 22 15 39 48 15 52 2 -0.03 -140 0 0 15 28 24 21 2 54.0 2 287 84 15 23 56 15 32 52 15 22 17 15 34 32 -0.04 -139 0 0 15 10 35 21 2 54.3 1 287 85 15 6 7 15 15 3 15 4 27 15 16 43 -0.08 -138 0 0 14 52 27 21 2 54.4 0 287 86 14 47 58 14 56 55 14 46 18 14 58 35 -0.24 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 535-005099 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 52 22.1676 DE: +16 49 36.914 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 52 22.1679 DE: +16 49 36.915 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.6 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2051) Chang asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.37160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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", 0.002", 74.249° remarks: * orbital elements for (2051)Chang : Mean anomaly = 353.1289740800 deg Arg. of pericenter = 175.9393244900 deg Long. of node = 215.0512721250 deg Inclination = 1.3568139753 deg Eccentricity = 0.0772840089 Semimajor axis = 2.8406227102 AU Perihelion dist = 2.6210879993 AU Mag: H = 11.76, G = 0.15 Epoch of elements : MJD 60532.87239954 TDT (2024 Aug 10.8724) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,0.99,2024,8,10,20.937573,0.000980,-0.005447,8.688686,2.432454,-0.005293,-0.001598,0.000000,0.000000 129.5460,16.9283,-132.75,15.22,False UCAC4 535-005099,2.87282432,16.8269206,11.96,11.55,11.33,0.0,0,,2.89569612,16.9283476,5.27,5.05,0,0,0 2051,Chang,16.81,15.752,2.3716,0,0,2.245,9.02,,2.4,0 0,352.9494,2024,8,10,175.9393,215.0513,1.3568,0.07728,2.84062,2.62109,11.76,5.0,0.15 1.186,0.0153,0.0017,74,0.0017,Known errors,0.88,0,-1,-1 20240810_005099,60140.24 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org