IOTA/IOTA-ES occultation update for (2591) Dworetsky / UCAC4 328-158962 event on 2024 Oct 12, 10:03 UT Visible from Summary ------- On 2024 Oct 12 UT, the 12.8619333977396 km diameter asteroid (2591) Dworetsky will occult a 11.7 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 5.48 mag to 17.18 mag (the magnitude of the asteroid) for at most 0.540 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 Oct 12, 09:59 - 2024 Oct 12, 10:07 * geocentric midpoint of event [JD]: 2460595.91908454 * magnitude of target star: 11.71 * magnitude drop [mag]: 5.48 * estimated maximum duration [s]: 0.540 * Moon: 68 % sunlit, 34° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.001", 87°) * approx speed of asteroid's shadow [km/s]: 24.0453 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 328-158962 by 2591 Dworetsky on 2024 Oct 12 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 23 0 0 12 27 54 9 59 18.1 1 115 70 12 23 46 12 32 1 12 22 20 12 33 27 .... 24 0 0 12 0 18 9 59 18.2 2 116 70 11 56 11 12 4 26 11 54 45 12 5 51 -0.15 25 0 0 11 32 52 9 59 18.4 3 116 71 11 28 45 11 36 59 11 27 19 11 38 24 -0.22 26 0 0 11 5 35 9 59 18.7 4 116 71 11 1 28 11 9 41 11 0 3 11 11 7 -0.25 27 0 0 10 38 28 9 59 19.2 5 116 72 10 34 21 10 42 34 10 32 56 10 44 0 -0.27 28 0 0 10 11 32 9 59 19.7 6 116 72 10 7 26 10 15 38 10 6 1 10 17 3 -0.28 29 0 0 9 44 47 9 59 20.3 7 117 72 9 40 42 9 48 53 9 39 17 9 50 18 -0.29 30 0 0 9 18 15 9 59 21.0 8 117 73 9 14 10 9 22 21 9 12 45 9 23 46 -0.29 31 0 0 8 51 56 9 59 21.8 9 117 73 8 47 51 8 56 1 8 46 27 8 57 26 -0.30 32 0 0 8 25 51 9 59 22.7 11 117 73 8 21 46 8 29 56 8 20 22 8 31 20 -0.30 33 0 0 8 0 0 9 59 23.8 12 117 73 7 55 56 8 4 4 7 54 31 8 5 29 -0.31 34 0 0 7 34 24 9 59 24.9 13 117 73 7 30 20 7 38 28 7 28 56 7 39 52 -0.31 35 0 0 7 9 3 9 59 26.1 14 118 73 7 5 0 7 13 7 7 3 36 7 14 31 -0.31 36 0 0 6 43 59 9 59 27.4 15 118 73 6 39 56 6 48 2 6 38 32 6 49 26 -0.31 37 0 0 6 19 11 9 59 28.8 16 118 73 6 15 9 6 23 14 6 13 45 6 24 38 -0.31 38 0 0 5 54 41 9 59 30.3 17 118 72 5 50 39 5 58 43 5 49 15 6 0 7 -0.32 39 0 0 5 30 29 9 59 31.9 18 118 72 5 26 27 5 34 31 5 25 4 5 35 54 -0.32 40 0 0 5 6 35 9 59 33.5 19 118 72 5 2 34 5 10 37 5 1 11 5 12 0 -0.32 41 0 0 4 43 1 9 59 35.3 20 118 71 4 39 0 4 47 2 4 37 37 4 48 25 -0.32 42 0 0 4 19 46 9 59 37.2 21 118 71 4 15 45 4 23 46 4 14 22 4 25 9 -0.32 43 0 0 3 56 51 9 59 39.1 22 119 70 3 52 51 4 0 50 3 51 28 4 2 13 -0.32 44 0 0 3 34 16 9 59 41.2 23 119 69 3 30 17 3 38 15 3 28 54 3 39 38 -0.32 45 0 0 3 12 2 9 59 43.3 24 119 69 3 8 4 3 16 2 3 6 41 3 17 24 -0.32 46 0 0 2 50 10 9 59 45.5 26 119 68 2 46 12 2 54 9 2 44 49 2 55 31 -0.32 47 0 0 2 28 40 9 59 47.8 27 119 67 2 24 42 2 32 38 2 23 20 2 34 1 -0.33 48 0 0 2 7 32 9 59 50.2 28 119 67 2 3 35 2 11 30 2 2 13 2 12 52 -0.33 49 0 0 1 46 47 9 59 52.7 29 119 66 1 42 50 1 50 44 1 41 28 1 52 6 -0.33 50 0 0 1 26 25 9 59 55.2 30 120 65 1 22 28 1 30 22 1 21 6 1 31 44 -0.33 51 0 0 1 6 26 9 59 57.8 31 120 64 1 2 30 1 10 22 1 1 8 1 11 44 -0.33 52 0 0 0 46 51 10 0 0.5 32 120 63 0 42 55 0 50 47 0 41 34 0 52 9 -0.33 53 0 0 0 27 40 10 0 3.3 33 120 62 0 23 45 0 31 36 0 22 24 0 32 57 -0.33 54 0 0 0 8 54 10 0 6.1 34 120 62 0 4 59 0 12 49 0 3 38 0 14 10 -0.33 55 0 0 - 0 9 28 10 0 9.0 35 120 61 - 0 13 22 - 0 5 33 - 0 14 43 - 0 4 12 -0.33 56 0 0 - 0 27 24 10 0 12.0 36 120 60 - 0 31 18 - 0 23 30 - 0 32 39 - 0 22 9 -0.33 57 0 0 - 0 44 55 10 0 15.1 37 121 59 - 0 48 49 - 0 41 2 - 0 50 10 - 0 39 41 -0.33 58 0 0 - 1 2 1 10 0 18.2 38 121 58 - 1 5 54 - 0 58 8 - 1 7 15 - 0 56 47 -0.33 59 0 0 - 1 18 41 10 0 21.4 39 121 57 - 1 22 33 - 1 14 48 - 1 23 54 - 1 13 27 -0.33 60 0 0 - 1 34 54 10 0 24.7 40 121 56 - 1 38 47 - 1 31 2 - 1 40 7 - 1 29 42 -0.33 61 0 0 - 1 50 42 10 0 28.0 41 122 55 - 1 54 34 - 1 46 50 - 1 55 54 - 1 45 29 -0.33 62 0 0 - 2 6 3 10 0 31.4 42 122 54 - 2 9 54 - 2 2 11 - 2 11 14 - 2 0 51 -0.33 63 0 0 - 2 20 57 10 0 34.8 43 122 53 - 2 24 48 - 2 17 5 - 2 26 8 - 2 15 45 -0.33 64 0 0 - 2 35 24 10 0 38.3 44 122 52 - 2 39 15 - 2 31 33 - 2 40 34 - 2 30 13 -0.33 65 0 0 - 2 49 24 10 0 41.9 45 123 51 - 2 53 14 - 2 45 34 - 2 54 34 - 2 44 14 -0.33 66 0 0 - 3 2 57 10 0 45.5 46 123 50 - 3 6 47 - 2 59 7 - 3 8 6 - 2 57 47 -0.33 67 0 0 - 3 16 2 10 0 49.2 47 123 49 - 3 19 52 - 3 12 13 - 3 21 11 - 3 10 53 -0.34 68 0 0 - 3 28 40 10 0 52.9 48 124 48 - 3 32 30 - 3 24 51 - 3 33 49 - 3 23 32 -0.34 69 0 0 - 3 40 51 10 0 56.7 49 124 47 - 3 44 40 - 3 37 1 - 3 45 59 - 3 35 42 -0.34 70 0 0 - 3 52 33 10 1 0.5 50 124 46 - 3 56 22 - 3 48 44 - 3 57 41 - 3 47 25 -0.34 71 0 0 - 4 3 47 10 1 4.4 51 125 45 - 4 7 36 - 3 59 59 - 4 8 55 - 3 58 40 -0.34 72 0 0 - 4 14 34 10 1 8.3 52 125 44 - 4 18 22 - 4 10 46 - 4 19 41 - 4 9 27 -0.34 73 0 0 - 4 24 52 10 1 12.3 53 126 43 - 4 28 40 - 4 21 4 - 4 29 58 - 4 19 45 -0.34 74 0 0 - 4 34 42 10 1 16.3 53 126 42 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5 3 41 - 4 56 7 - 5 5 0 - 4 54 49 -0.34 112 0 0 - 4 51 23 10 4 8.0 69 198 4 - 4 55 11 - 4 47 36 - 4 56 29 - 4 46 18 -0.34 113 0 0 - 4 42 24 10 4 12.7 69 200 3 - 4 46 11 - 4 38 36 - 4 47 30 - 4 37 18 -0.34 114 0 0 - 4 32 56 10 4 17.4 68 202 2 - 4 36 43 - 4 29 8 - 4 38 2 - 4 27 49 -0.34 115 0 0 - 4 22 59 10 4 22.1 68 204 1 - 4 26 47 - 4 19 11 - 4 28 5 - 4 17 52 -0.34 116 0 0 - 4 12 33 10 4 26.7 67 206 0 - 4 16 22 - 4 8 45 - 4 17 40 - 4 7 26 -0.34 117 0 0 - 4 1 40 10 4 31.4 66 208 -1 - 4 5 28 - 3 57 51 - 4 6 47 - 3 56 32 -0.34 118 0 0 - 3 50 17 10 4 36.0 66 210 -2 - 3 54 6 - 3 46 29 - 3 55 25 - 3 45 9 -0.34 119 0 0 - 3 38 27 10 4 40.6 65 212 -3 - 3 42 16 - 3 34 38 - 3 43 36 - 3 33 19 -0.34 120 0 0 - 3 26 9 10 4 45.2 64 213 -4 - 3 29 58 - 3 22 19 - 3 31 18 - 3 21 0 -0.34 121 0 0 - 3 13 23 10 4 49.8 64 214 -5 - 3 17 12 - 3 9 33 - 3 18 32 - 3 8 13 -0.34 122 0 0 - 3 0 8 10 4 54.3 63 216 -6 - 3 3 59 - 2 56 18 - 3 5 18 - 2 54 58 -0.34 123 0 0 - 2 46 27 10 4 58.8 62 217 -7 - 2 50 17 - 2 42 36 - 2 51 37 - 2 41 16 -0.34 124 0 0 - 2 32 17 10 5 3.3 61 218 -8 - 2 36 8 - 2 28 26 - 2 37 28 - 2 27 6 -0.34 125 0 0 - 2 17 40 10 5 7.8 60 219 -9 - 2 21 32 - 2 13 49 - 2 22 52 - 2 12 29 -0.34 126 0 0 - 2 2 37 10 5 12.2 60 220 -10 - 2 6 28 - 1 58 45 - 2 7 48 - 1 57 25 -0.34 127 0 0 - 1 47 6 10 5 16.7 59 221 -11 - 1 50 58 - 1 43 13 - 1 52 18 - 1 41 53 -0.34 128 0 0 - 1 31 8 10 5 21.0 58 222 -12 - 1 35 0 - 1 27 15 - 1 36 21 - 1 25 55 -0.34 129 0 0 - 1 14 44 10 5 25.4 57 223 -13 - 1 18 37 - 1 10 50 - 1 19 57 - 1 9 30 -0.34 130 0 0 - 0 57 53 10 5 29.7 56 224 -15 - 1 1 46 - 0 53 59 - 1 3 7 - 0 52 39 -0.34 131 0 0 - 0 40 36 10 5 34.0 55 225 -16 - 0 44 30 - 0 36 42 - 0 45 51 - 0 35 21 -0.34 132 0 0 - 0 22 53 10 5 38.2 54 225 -17 - 0 26 47 - 0 18 59 - 0 28 8 - 0 17 38 -0.34 133 0 0 - 0 4 45 10 5 42.4 53 226 -18 - 0 8 39 - 0 0 50 - 0 10 1 0 0 31 -0.34 134 0 0 0 13 49 10 5 46.5 52 227 -19 0 9 54 0 17 44 0 8 33 0 19 6 -0.34 135 0 0 0 32 48 10 5 50.6 51 227 -20 0 28 52 0 36 44 0 27 31 0 38 5 -0.34 136 0 0 0 52 12 10 5 54.7 50 228 -21 0 48 16 0 56 8 0 46 54 0 57 30 -0.34 137 0 0 1 12 0 10 5 58.7 49 228 -22 1 8 3 1 15 56 1 6 41 1 17 18 -0.34 138 0 0 1 32 12 10 6 2.6 48 229 -23 1 28 15 1 36 9 1 26 53 1 37 31 -0.34 139 0 0 1 52 48 10 6 6.5 47 229 -24 1 48 50 1 56 45 1 47 28 1 58 8 -0.34 140 0 0 2 13 47 10 6 10.3 46 230 -25 2 9 49 2 17 45 2 8 27 2 19 8 -0.34 141 0 0 2 35 9 10 6 14.1 45 230 -26 2 31 11 2 39 8 2 29 48 2 40 30 -0.34 142 0 0 2 56 54 10 6 17.8 44 231 -27 2 52 55 3 0 53 2 51 33 3 2 16 -0.34 143 0 0 3 19 1 10 6 21.5 43 231 -28 3 15 2 3 23 1 3 13 39 3 24 23 -0.34 144 0 0 3 41 30 10 6 25.1 42 231 -29 3 37 30 3 45 30 3 36 7 3 46 53 -0.34 145 0 0 4 4 20 10 6 28.6 41 232 -30 4 0 19 4 8 20 3 58 56 4 9 43 -0.34 146 0 0 4 27 30 10 6 32.1 40 232 -31 4 23 29 4 31 31 4 22 6 4 32 54 -0.34 147 0 0 4 51 1 10 6 35.5 39 233 -32 4 47 0 4 55 2 4 45 37 4 56 26 -0.34 148 0 0 5 14 52 10 6 38.8 38 233 -33 5 10 50 5 18 54 5 9 27 5 20 17 -0.34 149 0 0 5 39 2 10 6 42.0 37 233 -34 5 35 0 5 43 4 5 33 36 5 44 28 -0.34 150 0 0 6 3 30 10 6 45.2 36 234 -35 5 59 28 6 7 33 5 58 4 6 8 57 -0.34 151 0 0 6 28 17 10 6 48.3 35 234 -37 6 24 14 6 32 20 6 22 50 6 33 44 -0.34 152 0 0 6 53 21 10 6 51.3 34 234 -38 6 49 18 6 57 24 6 47 53 6 58 49 -0.34 153 0 0 7 18 42 10 6 54.3 33 234 -39 7 14 38 7 22 46 7 13 14 7 24 10 -0.34 154 0 0 7 44 19 10 6 57.1 32 235 -40 7 40 15 7 48 24 7 38 51 7 49 48 -0.34 155 0 0 8 10 12 10 6 59.9 31 235 -41 8 6 8 8 14 17 8 4 43 8 15 42 -0.34 156 0 0 8 36 20 10 7 2.6 30 235 -42 8 32 15 8 40 26 8 30 51 8 41 50 -0.34 157 0 0 9 2 43 10 7 5.2 29 235 -43 8 58 37 9 6 48 8 57 12 9 8 13 -0.34 158 0 0 9 29 19 10 7 7.7 28 236 -44 9 25 13 9 33 25 9 23 48 9 34 50 -0.34 159 0 0 9 56 8 10 7 10.2 27 236 -45 9 52 2 10 0 14 9 50 37 10 1 39 -0.34 160 0 0 10 23 9 10 7 12.5 26 236 -46 10 19 3 10 27 16 10 17 37 10 28 41 -0.34 161 0 0 10 50 22 10 7 14.7 24 237 -47 10 46 15 10 54 29 10 44 50 10 55 55 -0.34 162 0 0 11 17 46 10 7 16.9 23 237 -48 11 13 38 11 21 53 11 12 13 11 23 19 -0.34 163 0 0 11 45 19 10 7 19.0 22 237 -49 11 41 12 11 49 27 11 39 46 11 50 53 -0.34 164 0 0 12 13 2 10 7 20.9 21 237 -50 12 8 55 12 17 10 12 7 29 12 18 36 -0.34 165 0 0 12 40 54 10 7 22.8 20 238 -51 12 36 46 12 45 2 12 35 20 12 46 28 -0.34 166 0 0 13 8 53 10 7 24.6 19 238 -52 13 4 45 13 13 2 13 3 19 13 14 28 -0.34 167 0 0 13 37 0 10 7 26.3 18 238 -52 13 32 51 13 41 9 13 31 25 13 42 35 -0.33 168 0 0 14 5 12 10 7 27.8 17 238 -53 14 1 3 14 9 22 13 59 37 14 10 48 -0.33 169 0 0 14 33 31 10 7 29.3 16 239 -54 14 29 21 14 37 40 14 27 55 14 39 6 -0.33 170 0 0 15 1 53 10 7 30.7 15 239 -55 14 57 44 15 6 3 14 56 18 15 7 29 -0.33 171 0 0 15 30 20 10 7 32.0 14 239 -56 15 26 10 15 34 29 15 24 44 15 35 56 -0.33 172 0 0 15 58 49 10 7 33.2 13 240 -57 15 54 40 16 2 59 15 53 13 16 4 26 -0.33 173 0 0 16 27 21 10 7 34.3 12 240 -58 16 23 11 16 31 31 16 21 45 16 32 58 -0.33 174 0 0 16 55 54 10 7 35.3 10 240 -59 16 51 44 17 0 5 16 50 18 17 1 31 -0.33 175 0 0 17 24 28 10 7 36.2 9 240 -59 17 20 18 17 28 39 17 18 52 17 30 5 -0.34 176 0 0 17 53 2 10 7 37.0 8 241 -60 17 48 52 17 57 13 17 47 25 17 58 39 -0.34 177 0 0 18 21 35 10 7 37.7 7 241 -61 18 17 25 18 25 46 18 15 58 18 27 12 -0.34 178 0 0 18 50 6 10 7 38.3 6 241 -62 18 45 56 18 54 17 18 44 29 18 55 44 -0.34 179 0 0 19 18 35 10 7 38.8 5 242 -63 19 14 24 19 22 46 19 12 58 19 24 12 -0.34 180 0 0 19 47 0 10 7 39.2 4 242 -63 19 42 50 19 51 11 19 41 23 19 52 38 -0.34 -179 0 0 20 15 22 10 7 39.5 3 242 -64 20 11 11 20 19 32 20 9 44 20 20 59 -0.34 -178 0 0 20 43 38 10 7 39.7 2 243 -64 20 39 28 20 47 49 20 38 1 20 49 16 -0.34 -177 0 0 21 11 49 10 7 39.8 1 243 -65 21 7 39 21 16 0 21 6 12 21 17 27 -0.35 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 328-158962 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 29 02.7395 DE: -24 34 36.928 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 29 02.7395 DE: -24 34 36.928 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2591) Dworetsky asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.88260 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.014", 0.001", 86.602° remarks: * orbital elements for (2591)Dworetsky : Mean anomaly = 28.7989336686 deg Arg. of pericenter = 269.5349891672 deg Long. of node = 356.0276039014 deg Inclination = 1.5402927239 deg Eccentricity = 0.0401302312 Semimajor axis = 2.9389631841 AU Perihelion dist = 2.8210219122 AU Mag: H = 11.62, G = 0.15 Epoch of elements : MJD 60595.41908417 TDT (2024 Oct 12.4191) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,0.54,2024,10,12,10.058029,-0.027823,0.322232,13.522979,1.150262,0.005621,0.000271,0.000000,0.000000 105.2944,-24.5619,25.73,-7.66,False UCAC4 328-158962,18.48409433,-24.5769244,12.76,11.71,11.14,0.1,0,,18.50929203,-24.5618774,5.47,5.59,0,0,0 2591,Dworetsky,17.18,13.071,2.8826,0,0,3.024,3.51,,1.2,0 0,28.7170,2024,10,12,269.5350,356.0276,1.5403,0.04013,2.93896,2.82102,11.61,5.0,0.15 1.173,0.0137,0.0010,87,0.0011,Known errors,0.70,0,-1,-1 20241012_158962,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org