IOTA/IOTA-ES occultation update for (886) Washingtonia / TYC 7383-00449-1 event on 2023 Jun 25, 02:29 UT Visible from Africa, South America Summary ------- On 2023 Jun 25 UT, the 90.8 km diameter asteroid (886) Washingtonia will occult a 11.6 mag star in the constellation Scorpius for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.20 mag to 13.66 mag (the magnitude of the asteroid) for at most 6.840 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 Jun 25, 02:22 - 2023 Jun 25, 02:35 * geocentric midpoint of event [JD]: 2460120.60351963 * magnitude of target star: 11.61 * magnitude drop [mag]: 2.20 * estimated maximum duration [s]: 6.840 * Moon: 38 % sunlit, 95° distance * Sun: 164° distance * rough path description: Africa, South America The occultation path -------------------- * approximate projected width [km]: 115 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.009", 113°) * approx speed of asteroid's shadow [km/s]: 13.2845 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7383-00449-1 by 886 Washingtonia on 2023 Jun 25 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 -125 0 0 19 35 30 2 35 22.3 0 128 5 .. .. .. 18 55 44 .. .. .. 18 32 16 .... -124 0 0 18 52 1 2 35 22.1 2 128 4 19 31 54 18 12 35 19 55 53 17 49 18 -0.34 -123 0 0 18 9 19 2 35 21.6 3 129 3 18 48 52 17 30 13 19 12 39 17 7 8 -0.55 -122 0 0 17 27 28 2 35 20.9 4 129 1 18 6 40 16 48 41 18 30 15 16 25 47 -0.63 -121 0 0 16 46 26 2 35 20.0 5 129 0 17 25 19 16 7 58 17 48 41 15 45 15 -0.67 -120 0 0 16 6 14 2 35 18.8 6 129 -1 16 44 48 15 28 5 17 7 59 15 5 33 -0.70 -119 0 0 15 26 53 2 35 17.3 7 130 -2 16 5 9 14 49 2 16 28 8 14 26 41 -0.71 -118 0 0 14 48 24 2 35 15.6 9 130 -3 15 26 21 14 10 51 15 49 9 13 48 40 -0.73 -117 0 0 14 10 47 2 35 13.7 10 130 -4 14 48 26 13 33 31 15 11 3 13 11 29 -0.74 -116 0 0 13 34 1 2 35 11.6 11 131 -5 14 11 23 12 57 2 14 33 49 12 35 10 -0.74 -115 0 0 12 58 8 2 35 9.2 12 131 -7 13 35 13 12 21 25 13 57 29 11 59 43 -0.75 -114 0 0 12 23 6 2 35 6.7 13 131 -8 12 59 55 11 46 39 13 22 1 11 25 7 -0.75 -113 0 0 11 48 57 2 35 3.9 14 131 -9 12 25 30 11 12 46 12 47 26 10 51 23 -0.76 -112 0 0 11 15 41 2 35 0.9 15 132 -10 11 51 58 10 39 45 12 13 44 10 18 30 -0.76 -111 0 0 10 43 17 2 34 57.7 16 132 -11 11 19 19 10 7 36 11 40 56 9 46 30 -0.76 -110 0 0 10 11 45 2 34 54.3 17 132 -12 10 47 32 9 36 18 11 9 1 9 15 21 -0.77 -109 0 0 9 41 6 2 34 50.7 18 132 -13 10 16 39 9 5 53 10 37 58 8 45 3 -0.77 -108 0 0 9 11 19 2 34 47.0 19 133 -14 9 46 38 8 36 19 10 7 49 8 15 38 -0.77 -107 0 0 8 42 24 2 34 43.1 21 133 -15 9 17 30 8 7 38 9 38 33 7 47 3 -0.77 -106 0 0 8 14 21 2 34 38.9 22 133 -17 8 49 14 7 39 47 9 10 9 7 19 21 -0.77 -105 0 0 7 47 10 2 34 34.7 23 133 -18 8 21 51 7 12 49 8 42 38 6 52 29 -0.77 -104 0 0 7 20 51 2 34 30.2 24 134 -19 7 55 19 6 46 41 8 15 59 6 26 28 -0.77 -103 0 0 6 55 23 2 34 25.6 25 134 -20 7 29 40 6 21 25 7 50 13 6 1 19 -0.77 -102 0 0 6 30 47 2 34 20.9 26 134 -21 7 4 52 5 56 59 7 25 18 5 36 59 -0.78 -101 0 0 6 7 1 2 34 16.0 27 135 -22 6 40 56 5 33 24 7 1 15 5 13 31 -0.78 -100 0 0 5 44 7 2 34 11.0 27 135 -23 6 17 50 5 10 40 6 38 4 4 50 52 -0.78 - 99 0 0 5 22 3 2 34 5.8 28 135 -24 5 55 36 4 48 45 6 15 44 4 29 3 -0.78 - 98 0 0 5 0 49 2 34 0.5 29 136 -25 5 34 13 4 27 41 5 54 14 4 8 5 -0.78 - 97 0 0 4 40 25 2 33 55.0 30 136 -26 5 13 40 4 7 26 5 33 36 3 47 55 -0.78 - 96 0 0 4 20 52 2 33 49.5 31 136 -27 4 53 58 3 48 1 5 13 48 3 28 35 -0.78 - 95 0 0 4 2 7 2 33 43.8 32 137 -28 4 35 5 3 29 25 4 54 50 3 10 4 -0.78 - 94 0 0 3 44 13 2 33 37.9 33 137 -29 4 17 2 3 11 38 4 36 43 2 52 22 -0.78 - 93 0 0 3 27 7 2 33 32.0 34 137 -30 3 59 49 2 54 40 4 19 25 2 35 28 -0.78 - 92 0 0 3 10 50 2 33 26.0 35 138 -31 3 43 25 2 38 31 4 2 56 2 19 23 -0.78 - 91 0 0 2 55 22 2 33 19.8 36 138 -32 3 27 50 2 23 9 3 47 17 2 4 5 -0.78 - 90 0 0 2 40 43 2 33 13.6 36 139 -33 3 13 4 2 8 36 3 32 27 1 49 36 -0.78 - 89 0 0 2 26 51 2 33 7.2 37 139 -34 2 59 6 1 54 51 3 18 25 1 35 54 -0.78 - 88 0 0 2 13 48 2 33 0.8 38 140 -35 2 45 57 1 41 53 3 5 12 1 22 59 -0.78 - 87 0 0 2 1 32 2 32 54.2 39 140 -36 2 33 35 1 29 43 2 52 48 1 10 52 -0.78 - 86 0 0 1 50 4 2 32 47.6 40 141 -37 2 22 2 1 18 20 2 41 11 0 59 32 -0.78 - 85 0 0 1 39 23 2 32 40.8 40 141 -37 2 11 17 1 7 43 2 30 23 0 48 59 -0.78 - 84 0 0 1 29 29 2 32 34.0 41 142 -38 2 1 19 0 57 54 2 20 22 0 39 12 -0.78 - 83 0 0 1 20 23 2 32 27.1 42 143 -39 1 52 8 0 48 52 2 11 9 0 30 12 -0.78 - 82 0 0 1 12 3 2 32 20.1 42 143 -40 1 43 44 0 40 35 2 2 43 0 21 58 -0.78 - 81 0 0 1 4 30 2 32 13.1 43 144 -41 1 36 8 0 33 6 1 55 5 0 14 30 -0.78 - 80 0 0 0 57 43 2 32 6.0 44 145 -42 1 29 18 0 26 22 1 48 13 0 7 48 -0.78 - 79 0 0 0 51 43 2 31 58.7 44 145 -43 1 23 15 0 20 25 1 42 9 0 1 52 -0.78 - 78 0 0 0 46 29 2 31 51.5 45 146 -44 1 17 59 0 15 13 1 36 51 - 0 3 18 -0.78 - 77 0 0 0 42 2 2 31 44.1 46 147 -45 1 13 29 0 10 47 1 32 20 - 0 7 42 -0.78 - 76 0 0 0 38 20 2 31 36.7 46 148 -45 1 9 46 0 7 8 1 28 35 - 0 11 21 -0.78 - 75 0 0 0 35 25 2 31 29.2 47 148 -46 1 6 49 0 4 13 1 25 38 - 0 14 15 -0.78 - 74 0 0 0 33 15 2 31 21.7 47 149 -47 1 4 38 0 2 5 1 23 26 - 0 16 23 -0.78 - 73 0 0 0 31 51 2 31 14.1 48 150 -48 1 3 14 0 0 42 1 22 1 - 0 17 45 -0.78 - 72 0 0 0 31 13 2 31 6.5 48 151 -49 1 2 35 0 0 4 1 21 22 - 0 18 23 -0.78 - 71 0 0 0 31 21 2 30 58.8 49 152 -49 1 2 43 0 0 12 1 21 30 - 0 18 15 -0.78 - 70 0 0 0 32 14 2 30 51.0 49 153 -50 1 3 36 0 1 5 1 22 24 - 0 17 22 -0.78 - 69 0 0 0 33 53 2 30 43.2 50 154 -51 1 5 16 0 2 44 1 24 4 - 0 15 43 -0.78 - 68 0 0 0 36 18 2 30 35.4 50 155 -51 1 7 42 0 5 8 1 26 30 - 0 13 20 -0.78 - 67 0 0 0 39 29 2 30 27.5 50 156 -52 1 10 54 0 8 17 1 29 43 - 0 10 11 -0.78 - 66 0 0 0 43 25 2 30 19.5 51 157 -53 1 14 51 0 12 12 1 33 41 - 0 6 17 -0.78 - 65 0 0 0 48 7 2 30 11.6 51 159 -54 1 19 35 0 16 52 1 38 26 - 0 1 38 -0.78 - 64 0 0 0 53 35 2 30 3.5 51 160 -54 1 25 5 0 22 18 1 43 57 0 3 46 -0.78 - 63 0 0 0 59 48 2 29 55.5 51 161 -55 1 31 21 0 28 29 1 50 15 0 9 56 -0.78 - 62 0 0 1 6 48 2 29 47.4 52 162 -55 1 38 23 0 35 26 1 57 19 0 16 51 -0.78 - 61 0 0 1 14 33 2 29 39.3 52 163 -56 1 46 12 0 43 8 2 5 10 0 24 32 -0.78 - 60 0 0 1 23 5 2 29 31.1 52 165 -56 1 54 47 0 51 36 2 13 47 0 32 58 -0.78 - 59 0 0 1 32 22 2 29 22.9 52 166 -57 2 4 9 1 0 50 2 23 11 0 42 10 -0.78 - 58 0 0 1 42 26 2 29 14.7 52 167 -57 2 14 17 1 10 50 2 33 21 0 52 7 -0.78 - 57 0 0 1 53 17 2 29 6.5 52 169 -58 2 25 11 1 21 36 2 44 18 1 2 50 -0.78 - 56 0 0 2 4 53 2 28 58.3 52 170 -58 2 36 53 1 33 8 2 56 3 1 14 20 -0.78 - 55 0 0 2 17 17 2 28 50.0 52 171 -59 2 49 21 1 45 26 3 8 34 1 26 35 -0.78 - 54 0 0 2 30 27 2 28 41.7 52 172 -59 3 2 37 1 58 31 3 21 53 1 39 36 -0.78 - 53 0 0 2 44 24 2 28 33.4 52 174 -59 3 16 40 2 12 22 3 36 0 1 53 24 -0.78 - 52 0 0 2 59 7 2 28 25.1 52 175 -60 3 31 30 2 27 0 3 50 53 2 7 59 -0.78 - 51 0 0 3 14 38 2 28 16.8 51 176 -60 3 47 7 2 42 24 4 6 35 2 23 20 -0.78 - 50 0 0 3 30 57 2 28 8.5 51 178 -60 4 3 32 2 58 36 4 23 4 2 39 27 -0.78 - 49 0 0 3 48 3 2 28 0.2 51 179 -60 4 20 46 3 15 35 4 40 22 2 56 22 -0.78 - 48 0 0 4 5 56 2 27 51.9 51 180 -60 4 38 47 3 33 21 4 58 28 3 14 4 -0.78 - 47 0 0 4 24 38 2 27 43.6 50 181 -60 4 57 36 3 51 55 5 17 22 3 32 33 -0.78 - 46 0 0 4 44 7 2 27 35.3 50 183 -60 5 17 14 4 11 16 5 37 4 3 51 49 -0.79 - 45 0 0 5 4 24 2 27 27.1 50 184 -60 5 37 40 4 31 25 5 57 36 4 11 53 -0.79 - 44 0 0 5 25 30 2 27 18.8 49 185 -60 5 58 54 4 52 22 6 18 56 4 32 45 -0.79 - 43 0 0 5 47 24 2 27 10.6 49 186 -60 6 20 58 5 14 7 6 41 5 4 54 25 -0.79 - 42 0 0 6 10 7 2 27 2.3 48 187 -60 6 43 51 5 36 40 7 4 4 5 16 52 -0.79 - 41 0 0 6 33 38 2 26 54.2 48 188 -60 7 7 32 6 0 1 7 27 52 5 40 8 -0.79 - 40 0 0 6 57 59 2 26 46.0 47 189 -59 7 32 3 6 24 12 7 52 29 6 4 12 -0.79 - 39 0 0 7 23 9 2 26 37.9 47 190 -59 7 57 24 6 49 11 8 17 56 6 29 5 -0.79 - 38 0 0 7 49 7 2 26 29.8 46 191 -59 8 23 34 7 14 58 8 44 13 6 54 46 -0.79 - 37 0 0 8 15 55 2 26 21.8 45 192 -58 8 50 34 7 41 35 9 11 20 7 21 16 -0.79 - 36 0 0 8 43 33 2 26 13.8 45 193 -58 9 18 23 8 9 0 9 39 17 7 48 35 -0.79 - 35 0 0 9 12 0 2 26 5.9 44 194 -57 9 47 3 8 37 15 10 8 4 8 16 42 -0.79 - 34 0 0 9 41 16 2 25 58.0 43 195 -57 10 16 32 9 6 19 10 37 42 8 45 39 -0.79 - 33 0 0 10 11 22 2 25 50.2 43 196 -56 10 46 52 9 36 12 11 8 9 9 15 25 -0.79 - 32 0 0 10 42 18 2 25 42.5 42 197 -56 11 18 1 10 6 55 11 39 27 9 45 59 -0.80 - 31 0 0 11 14 3 2 25 34.9 41 198 -55 11 50 1 10 38 26 12 11 35 10 17 23 -0.80 - 30 0 0 11 46 38 2 25 27.3 40 199 -54 12 22 50 11 10 47 12 44 34 10 49 35 -0.80 - 29 0 0 12 20 3 2 25 19.9 39 200 -54 12 56 30 11 43 57 13 18 22 11 22 37 -0.80 - 28 0 0 12 54 16 2 25 12.5 39 200 -53 13 30 59 12 17 56 13 53 1 11 56 27 -0.80 - 27 0 0 13 29 19 2 25 5.2 38 201 -52 14 6 17 12 52 43 14 28 29 12 31 5 -0.80 - 26 0 0 14 5 11 2 24 58.1 37 202 -51 14 42 26 13 28 20 15 4 47 13 6 33 -0.80 - 25 0 0 14 41 52 2 24 51.0 36 202 -51 15 19 23 14 4 44 15 41 55 13 42 48 -0.80 - 24 0 0 15 19 22 2 24 44.1 35 203 -50 15 57 10 14 41 57 16 19 52 14 19 51 -0.80 - 23 0 0 15 57 39 2 24 37.3 34 204 -49 16 35 45 15 19 58 16 58 38 14 57 42 -0.80 - 22 0 0 16 36 45 2 24 30.7 33 205 -48 17 15 9 15 58 46 17 38 12 15 36 21 -0.80 - 21 0 0 17 16 38 2 24 24.1 32 205 -47 17 55 20 16 38 22 18 18 35 16 15 46 -0.81 - 20 0 0 17 57 18 2 24 17.8 31 206 -46 18 36 18 17 18 44 18 59 45 16 55 57 -0.81 - 19 0 0 18 38 44 2 24 11.6 30 206 -45 19 18 4 17 59 51 19 41 42 17 36 54 -0.81 - 18 0 0 19 20 56 2 24 5.5 29 207 -44 20 0 35 18 41 45 20 24 25 18 18 36 -0.81 - 17 0 0 20 3 53 2 23 59.7 28 208 -43 20 43 51 19 24 22 21 7 53 19 1 3 -0.81 - 16 0 0 20 47 34 2 23 54.0 27 208 -42 21 27 52 20 7 44 21 52 7 19 44 13 -0.81 - 15 0 0 21 31 58 2 23 48.5 26 209 -41 22 12 37 20 51 48 22 37 4 20 28 6 -0.81 - 14 0 0 22 17 4 2 23 43.2 25 209 -40 22 58 4 21 36 34 23 22 43 21 12 41 -0.81 - 13 0 0 23 2 51 2 23 38.1 24 210 -39 23 44 12 22 22 1 24 9 5 21 57 56 -0.81 - 12 0 0 23 49 18 2 23 33.2 22 210 -38 24 31 1 23 8 8 24 56 6 22 43 51 -0.81 - 11 0 0 24 36 24 2 23 28.5 21 211 -37 25 18 28 23 54 53 25 43 47 23 30 24 -0.82 - 10 0 0 25 24 7 2 23 24.0 20 212 -36 26 6 33 24 42 15 26 32 5 24 17 34 -0.82 - 9 0 0 26 12 26 2 23 19.8 19 212 -34 26 55 13 25 30 12 27 20 59 25 5 19 -0.82 - 8 0 0 27 1 19 2 23 15.8 18 213 -33 27 44 28 26 18 44 28 10 28 25 53 38 -0.82 - 7 0 0 27 50 44 2 23 12.1 17 213 -32 28 34 16 27 7 48 29 0 29 26 42 30 -0.82 - 6 0 0 28 40 39 2 23 8.5 15 214 -31 29 24 33 27 57 22 29 51 0 27 31 51 -0.82 - 5 0 0 29 31 3 2 23 5.3 14 214 -30 30 15 19 28 47 24 30 42 0 28 21 42 -0.82 - 4 0 0 30 21 53 2 23 2.3 13 215 -29 31 6 32 29 37 53 31 33 26 29 11 58 -0.83 - 3 0 0 31 13 8 2 22 59.5 12 215 -27 31 58 8 30 28 46 32 25 16 30 2 39 -0.83 - 2 0 0 32 4 44 2 22 57.0 11 216 -26 32 50 7 31 20 1 33 17 28 30 53 42 -0.83 - 1 0 0 32 56 39 2 22 54.8 10 216 -25 33 42 24 32 11 36 34 9 59 31 45 4 -0.83 0 0 0 33 48 51 2 22 52.8 8 217 -24 34 34 58 33 3 27 35 2 46 32 36 44 -0.84 1 0 0 34 41 18 2 22 51.1 7 218 -23 35 27 45 33 55 33 35 55 47 33 28 38 -0.84 2 0 0 35 33 55 2 22 49.7 6 218 -22 36 20 44 34 47 51 36 48 58 34 20 45 -0.85 3 0 0 36 26 41 2 22 48.5 5 219 -20 37 13 50 35 40 17 37 42 17 35 13 0 -0.85 4 0 0 37 19 33 2 22 47.6 4 219 -19 38 7 1 36 32 50 38 35 41 36 5 21 -0.87 5 0 0 38 12 27 2 22 47.0 2 220 -18 39 0 14 37 25 25 39 29 6 36 57 46 -0.90 6 0 0 39 5 20 2 22 46.6 1 221 -17 39 53 26 38 18 1 40 22 28 37 50 12 -0.98 7 0 0 39 58 9 2 22 46.5 0 221 -16 .. .. .. 39 10 33 .. .. .. 38 42 34 -2.91 Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 7383-00449-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 25 58.6309 DE: -35 13 02.485 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 25 58.6309 DE: -35 13 02.486 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (886) Washingtonia asteroid class: approx. diameter [km]: 91 approx. diameter ["]: 0.063 distance from Earth [AU]: 1.99640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.029", 0.009", 112.993° remarks: * orbital elements for (886)Washingtonia : Mean anomaly = 297.2393133379 deg Arg. of pericenter = 302.3618231326 deg Long. of node = 58.8453501956 deg Inclination = 16.8733740413 deg Eccentricity = 0.2712049705 Semimajor axis = 3.1670438237 AU Perihelion dist = 2.3081257970 AU Mag: H = 9.40, G = 0.15 Epoch of elements : MJD 60120.10347222 TDT (2023 Jun 25.1035) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,6.84,2023,6,25,2.484471,-0.145133,0.598053,-7.286651,-1.768308,0.001077,0.001084,0.000001,0.000000 -48.3564,-35.2387,143.38,23.40,False TYC 7383-00449-1,17.43295303,-35.2173570,0.00,11.61,0.00,0.0,0,,17.45934388,-35.2386622,2.20,0.00,0,0,0 886,Washingtonia,13.66,90.8,1.9964,0,0,-2.620,-7.79,,4.6,0 0,297.2212,2023,6,25,302.3618,58.8454,16.8734,0.27120,3.16704,2.30813,9.35,5.0,0.15 1.298,0.0287,0.0093,113,0.0187,Known errors,-1.00,-1,-1,-1 20230625_0449-1,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org