IOTA/IOTA-ES occultation update for (284) Amalia / UCAC4 345-072075 event on 2023 Apr 09, 06:33 UT Visible from USA, Canada Summary ------- On 2023 Apr 09 UT, the 56.8 km diameter asteroid (284) Amalia will occult a 11.9 mag star in the constellation Libra for observers along a path across USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.49 mag to 13.04 mag (the magnitude of the asteroid) for at most 9.600 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: 2023 Apr 09, 06:19 - 2023 Apr 09, 06:47 * geocentric midpoint of event [JD]: 2460043.77334542 * magnitude of target star: 11.87 * magnitude drop [mag]: 1.49 * estimated maximum duration [s]: 9.600 * Moon: 90 % sunlit, 11° distance * Sun: 154° distance * rough path description: USA, Canada The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.004", 101°) * approx speed of asteroid's shadow [km/s]: 5.9137 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-072075 by 284 Amalia on 2023 Apr 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 -116 0 0 63 59 46 6 47 22.6 0 145 -18 .. .. .. 63 24 15 .. .. .. 63 15 54 .... -115 0 0 63 20 57 6 47 22.5 1 146 -18 63 57 13 62 45 13 64 5 54 62 36 50 -0.26 -114 0 0 62 40 56 6 47 22.1 2 147 -19 63 17 24 62 5 2 63 26 8 61 56 35 -0.54 -113 0 0 61 59 44 6 47 21.4 3 148 -20 62 36 22 61 23 40 62 45 9 61 15 12 -0.65 -112 0 0 61 17 21 6 47 20.3 3 149 -21 61 54 8 60 41 9 62 2 57 60 32 39 -0.70 -111 0 0 60 33 48 6 47 19.0 4 150 -22 61 10 42 59 57 29 61 19 33 59 48 57 -0.74 -110 0 0 59 49 6 6 47 17.2 5 151 -22 60 26 6 59 12 42 60 34 58 59 4 9 -0.76 -109 0 0 59 3 17 6 47 15.0 6 152 -23 59 40 20 58 26 49 59 49 13 58 18 16 -0.78 -108 0 0 58 16 22 6 47 12.5 7 152 -24 58 53 27 57 39 52 59 2 21 57 31 18 -0.79 -107 0 0 57 28 23 6 47 9.5 8 153 -25 58 5 29 56 51 53 58 14 22 56 43 19 -0.80 -106 0 0 56 39 22 6 47 6.0 9 154 -26 57 16 27 56 2 54 57 25 20 55 54 20 -0.81 -105 0 0 55 49 23 6 47 2.1 10 155 -27 56 26 25 55 12 58 56 35 17 55 4 25 -0.81 -104 0 0 54 58 28 6 46 57.6 11 156 -28 55 35 25 54 22 8 55 44 16 54 13 36 -0.82 -103 0 0 54 6 41 6 46 52.6 12 157 -28 54 43 31 53 30 26 54 52 21 53 21 56 -0.83 -102 0 0 53 14 3 6 46 47.1 13 157 -29 53 50 46 52 37 57 53 59 34 52 29 28 -0.83 -101 0 0 52 20 40 6 46 41.1 14 158 -30 52 57 13 51 44 43 53 5 59 51 36 16 -0.83 -100 0 0 51 26 35 6 46 34.5 15 159 -31 52 2 57 50 50 48 52 11 40 50 42 24 -0.84 - 99 0 0 50 31 52 6 46 27.3 16 160 -32 51 8 2 49 56 16 51 16 42 49 47 55 -0.84 - 98 0 0 49 36 34 6 46 19.5 17 161 -33 50 12 30 49 1 12 50 21 7 48 52 53 -0.84 - 97 0 0 48 40 46 6 46 11.1 18 162 -34 49 16 28 48 5 38 49 25 1 47 57 23 -0.85 - 96 0 0 47 44 32 6 46 2.2 19 162 -35 48 19 58 47 9 39 48 28 27 47 1 27 -0.85 - 95 0 0 46 47 56 6 45 52.7 21 163 -36 47 23 5 46 13 18 47 31 30 46 5 10 -0.85 - 94 0 0 45 51 1 6 45 42.6 22 164 -36 46 25 53 45 16 41 46 34 14 45 8 37 -0.85 - 93 0 0 44 53 53 6 45 31.9 23 165 -37 45 28 27 44 19 50 45 36 43 44 11 50 -0.85 - 92 0 0 43 56 35 6 45 20.6 24 166 -38 44 30 49 43 22 50 44 39 1 43 14 54 -0.86 - 91 0 0 42 59 10 6 45 8.7 25 167 -39 43 33 6 42 25 44 43 41 13 42 17 52 -0.86 - 90 0 0 42 1 44 6 44 56.3 26 167 -40 42 35 19 41 28 36 42 43 21 41 20 49 -0.86 - 89 0 0 41 4 18 6 44 43.4 27 168 -40 41 37 33 40 31 30 41 45 31 40 23 47 -0.86 - 88 0 0 40 6 57 6 44 29.9 28 169 -41 40 39 52 39 34 29 40 47 44 39 26 51 -0.86 - 87 0 0 39 9 45 6 44 15.8 29 170 -42 39 42 19 38 37 36 39 50 6 38 30 3 -0.86 - 86 0 0 38 12 44 6 44 1.3 30 171 -42 38 44 58 37 40 55 38 52 40 37 33 26 -0.86 - 85 0 0 37 15 58 6 43 46.3 31 172 -43 37 47 50 36 44 29 37 55 28 36 37 5 -0.86 - 84 0 0 36 19 29 6 43 30.8 32 173 -44 36 51 1 35 48 20 36 58 33 35 41 0 -0.86 - 83 0 0 35 23 20 6 43 14.9 33 174 -44 35 54 32 34 52 32 36 1 59 34 45 16 -0.86 - 82 0 0 34 27 35 6 42 58.6 34 175 -45 34 58 26 33 57 6 35 5 48 33 49 55 -0.86 - 81 0 0 33 32 15 6 42 41.8 35 176 -45 34 2 45 33 2 5 34 10 2 32 54 59 -0.86 - 80 0 0 32 37 22 6 42 24.7 36 177 -46 33 7 32 32 7 32 33 14 45 32 0 31 -0.86 - 79 0 0 31 42 59 6 42 7.2 37 178 -46 32 12 50 31 13 29 32 19 57 31 6 32 -0.86 - 78 0 0 30 49 9 6 41 49.3 38 179 -46 31 18 39 30 19 57 31 25 42 30 13 4 -0.86 - 77 0 0 29 55 51 6 41 31.1 39 180 -47 30 25 3 29 26 59 30 32 1 29 20 10 -0.86 - 76 0 0 29 3 10 6 41 12.7 40 181 -47 29 32 2 28 34 35 29 38 56 28 27 51 -0.86 - 75 0 0 28 11 5 6 40 53.9 41 182 -47 28 39 39 27 42 48 28 46 28 27 36 9 -0.85 - 74 0 0 27 19 38 6 40 34.9 42 184 -47 27 47 54 26 51 40 27 54 38 26 45 4 -0.85 - 73 0 0 26 28 52 6 40 15.7 42 185 -47 26 56 49 26 1 11 27 3 29 25 54 39 -0.85 - 72 0 0 25 38 46 6 39 56.3 43 186 -47 26 6 26 25 11 22 26 13 2 25 4 54 -0.85 - 71 0 0 24 49 23 6 39 36.6 44 187 -47 25 16 45 24 22 15 25 23 17 24 15 51 -0.85 - 70 0 0 24 0 42 6 39 16.8 44 189 -47 24 27 48 23 33 51 24 34 16 23 27 31 -0.85 - 69 0 0 23 12 46 6 38 56.9 45 190 -47 23 39 35 22 46 11 23 45 59 22 39 54 -0.85 - 68 0 0 22 25 34 6 38 36.8 46 191 -47 22 52 8 21 59 15 22 58 28 21 53 2 -0.85 - 67 0 0 21 39 8 6 38 16.6 46 193 -47 22 5 26 21 13 4 22 11 42 21 6 55 -0.85 - 66 0 0 20 53 29 6 37 56.3 47 194 -47 21 19 31 20 27 39 21 25 44 20 21 34 -0.85 - 65 0 0 20 8 36 6 37 35.9 47 195 -47 20 34 24 19 43 1 20 40 33 19 36 59 -0.84 - 64 0 0 19 24 31 6 37 15.5 48 197 -46 19 50 4 18 59 10 19 56 10 18 53 11 -0.84 - 63 0 0 18 41 13 6 36 55.1 48 198 -46 19 6 33 18 16 6 19 12 35 18 10 10 -0.84 - 62 0 0 17 58 44 6 36 34.6 49 200 -46 18 23 50 17 33 49 18 29 48 17 27 57 -0.84 - 61 0 0 17 17 3 6 36 14.1 49 201 -45 17 41 56 16 52 22 17 47 51 16 46 32 -0.84 - 60 0 0 16 36 12 6 35 53.6 49 203 -45 17 0 51 16 11 43 17 6 44 16 5 56 -0.84 - 59 0 0 15 56 9 6 35 33.1 50 204 -44 16 20 36 15 31 52 16 26 25 15 26 9 -0.84 - 58 0 0 15 16 55 6 35 12.7 50 206 -44 15 41 10 14 52 51 15 46 56 14 47 10 -0.84 - 57 0 0 14 38 31 6 34 52.3 50 207 -43 15 2 34 14 14 38 15 8 18 14 9 0 -0.83 - 56 0 0 14 0 57 6 34 32.0 50 209 -43 14 24 48 13 37 15 14 30 29 13 31 40 -0.83 - 55 0 0 13 24 12 6 34 11.7 50 210 -42 13 47 53 13 0 42 13 53 31 12 55 9 -0.83 - 54 0 0 12 48 18 6 33 51.5 50 212 -42 13 11 47 12 24 58 13 17 23 12 19 27 -0.83 - 53 0 0 12 13 13 6 33 31.5 50 213 -41 12 36 32 11 50 3 12 42 5 11 44 35 -0.83 - 52 0 0 11 38 58 6 33 11.5 50 215 -41 12 2 7 11 15 58 12 7 37 11 10 32 -0.83 - 51 0 0 11 5 32 6 32 51.6 50 216 -40 11 28 31 10 42 42 11 34 0 10 37 18 -0.83 - 50 0 0 10 32 57 6 32 31.9 50 218 -39 10 55 46 10 10 16 11 1 13 10 4 54 -0.83 - 49 0 0 10 1 11 6 32 12.3 50 219 -39 10 23 52 9 38 39 10 29 15 9 33 20 -0.83 - 48 0 0 9 30 15 6 31 52.8 50 220 -38 9 52 47 9 7 52 9 58 8 9 2 34 -0.83 - 47 0 0 9 0 9 6 31 33.5 50 222 -37 9 22 32 8 37 54 9 27 51 8 32 38 -0.83 - 46 0 0 8 30 52 6 31 14.4 49 223 -36 8 53 6 8 8 45 8 58 24 8 3 31 -0.83 - 45 0 0 8 2 24 6 30 55.4 49 224 -36 8 24 31 7 40 25 8 29 46 7 35 14 -0.83 - 44 0 0 7 34 46 6 30 36.6 49 225 -35 7 56 45 7 12 55 8 1 59 7 7 45 -0.82 - 43 0 0 7 7 57 6 30 18.0 48 227 -34 7 29 48 6 46 13 7 35 0 6 41 5 -0.82 - 42 0 0 6 41 57 6 29 59.5 48 228 -33 7 3 41 6 20 20 7 8 52 6 15 13 -0.82 - 41 0 0 6 16 46 6 29 41.2 48 229 -32 6 38 23 5 55 16 6 43 32 5 50 11 -0.82 - 40 0 0 5 52 24 6 29 23.2 47 230 -32 6 13 54 5 31 0 6 19 2 5 25 57 -0.82 - 39 0 0 5 28 50 6 29 5.3 47 231 -31 5 50 15 5 7 33 5 55 20 5 2 31 -0.82 - 38 0 0 5 6 5 6 28 47.7 46 232 -30 5 27 24 4 44 54 5 32 28 4 39 53 -0.82 - 37 0 0 4 44 9 6 28 30.2 46 233 -29 5 5 21 4 23 3 5 10 24 4 18 4 -0.82 - 36 0 0 4 23 1 6 28 13.0 45 234 -28 4 44 8 4 2 0 4 49 9 3 57 2 -0.82 - 35 0 0 4 2 41 6 27 56.0 45 235 -28 4 23 42 3 41 46 4 28 42 3 36 49 -0.82 - 34 0 0 3 43 9 6 27 39.2 44 236 -27 4 4 5 3 22 19 4 9 4 3 17 23 -0.82 - 33 0 0 3 24 25 6 27 22.7 43 236 -26 3 45 17 3 3 40 3 50 14 2 58 45 -0.82 - 32 0 0 3 6 29 6 27 6.4 43 237 -25 3 27 16 2 45 48 3 32 12 2 40 55 -0.82 - 31 0 0 2 49 20 6 26 50.3 42 238 -24 3 10 3 2 28 44 3 14 59 2 23 52 -0.82 - 30 0 0 2 33 0 6 26 34.4 41 239 -23 2 53 38 2 12 27 2 58 33 2 7 36 -0.82 - 29 0 0 2 17 27 6 26 18.8 41 239 -22 2 38 1 1 56 58 2 42 55 1 52 8 -0.82 - 28 0 0 2 2 41 6 26 3.5 40 240 -21 2 23 12 1 42 16 2 28 5 1 37 26 -0.82 - 27 0 0 1 48 43 6 25 48.4 39 240 -21 2 9 10 1 28 21 2 14 2 1 23 32 -0.83 - 26 0 0 1 35 32 6 25 33.5 39 241 -20 1 55 56 1 15 13 2 0 47 1 10 25 -0.83 - 25 0 0 1 23 8 6 25 19.0 38 242 -19 1 43 30 1 2 52 1 48 20 0 58 5 -0.83 - 24 0 0 1 11 32 6 25 4.6 37 242 -18 1 31 51 0 51 19 1 36 40 0 46 32 -0.83 - 23 0 0 1 0 42 6 24 50.6 36 242 -17 1 20 59 0 40 32 1 25 48 0 35 46 -0.83 - 22 0 0 0 50 40 6 24 36.8 36 243 -16 1 10 55 0 30 32 1 15 43 0 25 47 -0.83 - 21 0 0 0 41 26 6 24 23.2 35 243 -15 1 1 38 0 21 19 1 6 26 0 16 34 -0.83 - 20 0 0 0 32 58 6 24 10.0 34 244 -14 0 53 8 0 12 54 0 57 56 0 8 9 -0.83 - 19 0 0 0 25 18 6 23 57.0 33 244 -13 0 45 26 0 5 15 0 50 14 0 0 30 -0.83 - 18 0 0 0 18 24 6 23 44.3 33 244 -12 0 38 32 - 0 1 37 0 43 19 - 0 6 21 -0.83 - 17 0 0 0 12 19 6 23 31.9 32 245 -11 0 32 25 - 0 7 42 0 37 12 - 0 12 26 -0.83 - 16 0 0 0 7 0 6 23 19.7 31 245 -10 0 27 5 - 0 13 0 0 31 52 - 0 17 43 -0.83 - 15 0 0 0 2 29 6 23 7.9 30 245 -10 0 22 34 - 0 17 30 0 27 20 - 0 22 13 -0.84 - 14 0 0 - 0 1 14 6 22 56.3 29 246 -9 0 18 50 - 0 21 13 0 23 36 - 0 25 56 -0.84 - 13 0 0 - 0 4 10 6 22 45.0 28 246 -8 0 15 54 - 0 24 9 0 20 40 - 0 28 52 -0.84 - 12 0 0 - 0 6 18 6 22 34.1 28 246 -7 0 13 46 - 0 26 17 0 18 32 - 0 31 0 -0.84 - 11 0 0 - 0 7 38 6 22 23.4 27 246 -6 0 12 26 - 0 27 37 0 17 13 - 0 32 20 -0.84 - 10 0 0 - 0 8 10 6 22 13.1 26 246 -5 0 11 55 - 0 28 9 0 16 41 - 0 32 53 -0.84 - 9 0 0 - 0 7 54 6 22 3.0 25 247 -4 0 12 12 - 0 27 54 0 16 59 - 0 32 37 -0.84 - 8 0 0 - 0 6 49 6 21 53.3 24 247 -3 0 13 18 - 0 26 50 0 18 5 - 0 31 34 -0.85 - 7 0 0 - 0 4 56 6 21 43.8 23 247 -2 0 15 12 - 0 24 58 0 20 0 - 0 29 42 -0.85 - 6 0 0 - 0 2 13 6 21 34.7 22 247 -1 0 17 56 - 0 22 16 0 22 44 - 0 27 1 -0.85 - 5 0 0 0 1 19 6 21 26.0 21 247 0 0 21 30 - 0 18 46 0 26 18 - 0 23 31 -0.85 - 4 0 0 0 5 40 6 21 17.5 20 247 1 0 25 53 - 0 14 27 0 30 42 - 0 19 13 -0.85 - 3 0 0 0 10 51 6 21 9.4 19 247 2 0 31 6 - 0 9 18 0 35 55 - 0 14 4 -0.86 - 2 0 0 0 16 52 6 21 1.7 19 248 3 0 37 10 - 0 3 20 0 42 0 - 0 8 6 -0.86 - 1 0 0 0 23 44 6 20 54.2 18 248 4 0 44 4 0 3 29 0 48 55 - 0 1 18 -0.86 0 0 0 0 31 26 6 20 47.2 17 248 5 0 51 50 0 11 9 0 56 41 0 6 21 -0.86 1 0 0 0 40 0 6 20 40.5 16 248 6 1 0 27 0 19 39 1 5 19 0 14 50 -0.87 2 0 0 0 49 25 6 20 34.1 15 248 7 1 9 56 0 29 1 1 14 48 0 24 11 -0.87 3 0 0 0 59 42 6 20 28.1 14 248 8 1 20 17 0 39 14 1 25 10 0 34 24 -0.87 4 0 0 1 10 52 6 20 22.5 13 248 9 1 31 31 0 50 20 1 36 25 0 45 28 -0.88 5 0 0 1 22 55 6 20 17.3 12 248 10 1 43 38 1 2 18 1 48 34 0 57 26 -0.88 6 0 0 1 35 51 6 20 12.5 11 248 11 1 56 39 1 15 10 2 1 36 1 10 16 -0.88 7 0 0 1 49 41 6 20 8.1 10 248 12 2 10 34 1 28 55 2 15 32 1 24 0 -0.89 8 0 0 2 4 25 6 20 4.0 9 248 13 2 25 24 1 43 34 2 30 23 1 38 38 -0.89 9 0 0 2 20 5 6 20 0.4 8 248 14 2 41 9 1 59 8 2 46 10 1 54 11 -0.90 10 0 0 2 36 40 6 19 57.2 7 248 15 2 57 50 2 15 37 3 2 52 2 10 39 -0.91 11 0 0 2 54 12 6 19 54.4 6 248 16 3 15 28 2 33 2 3 20 32 2 28 2 -0.92 12 0 0 3 12 40 6 19 52.1 5 248 17 3 34 3 2 51 24 3 39 8 2 46 22 -0.93 13 0 0 3 32 5 6 19 50.2 4 249 18 3 53 35 3 10 43 3 58 42 3 5 39 -0.95 14 0 0 3 52 29 6 19 48.8 3 249 19 4 14 7 3 30 59 4 19 15 3 25 54 -0.99 15 0 0 4 13 52 6 19 47.8 2 249 20 4 35 37 3 52 14 4 40 48 3 47 7 -1.07 16 0 0 4 36 14 6 19 47.3 1 249 21 4 58 7 4 14 28 5 3 20 4 9 20 -1.43 Uncertainty in time = +/- 3 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 345-072075 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 40 59.1594 DE: -21 03 38.580 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 40 59.1594 DE: -21 03 38.580 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (284) Amalia asteroid class: approx. diameter [km]: 57 approx. diameter ["]: 0.065 distance from Earth [AU]: 1.20840 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#129 date of fit: 2023 Feb 07 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): 0.017", 0.004", 101.094° remarks: * orbital elements for (284)Amalia : Mean anomaly = 304.8517623623 deg Arg. of pericenter = 58.0289740475 deg Long. of node = 233.6724143811 deg Inclination = 8.0545721890 deg Eccentricity = 0.2213839895 Semimajor axis = 2.3593124078 AU Perihelion dist = 1.8369984145 AU Mag: H = 10.24, G = 0.11 Epoch of elements : MJD 60043.27333333 TDT (2023 Apr 09.2733) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1292023Feb07,9.60,2023,4,9,6.560290,0.362769,0.526083,-2.747649,1.895136,-0.002092,0.001124,0.000001,0.000000 -75.0772,-21.1612,82.02,7.50,False UCAC4 345-072075,14.68309982,-21.0607165,0.00,11.87,0.00,0.0,0,,14.70524404,-21.1612055,1.49,0.00,0,0,0 284,Amalia,13.04,56.8,1.2084,0,0,-1.430,13.80,,3.2,0 0,304.7774,2023,4,9,58.0290,233.6724,8.0546,0.22138,2.35931,1.83700,10.25,5.0,0.15 1.119,0.0173,0.0037,101,0.0077,Known errors,-1.00,-1,-1,-1 20230409_072075,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org