IOTA/IOTA-ES occultation update for (943) Begonia / UCAC4 350-134194 event on 2023 Jul 25, 10:06 UT Visible from SE Australia Summary ------- On 2023 Jul 25 UT, the 67.1 km diameter asteroid (943) Begonia will occult a 11.4 mag star in the constellation Sagittarius for observers along a path across SE Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.03 mag to 15.42 mag (the magnitude of the asteroid) for at most 5.080 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 Jul 25, 09:58 - 2023 Jul 25, 10:15 * geocentric midpoint of event [JD]: 2460150.92144225 * magnitude of target star: 11.42 * magnitude drop [mag]: 4.03 * estimated maximum duration [s]: 5.080 * Moon: 46 % sunlit, 69° distance * Sun: 153° distance * rough path description: SE Australia Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 68 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 101°) * approx speed of asteroid's shadow [km/s]: 13.1975 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 350-134194 by 943 Begonia on 2023 Jul 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 80 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -24 45 15 .. .. .. -24 56 51 .... 81 0 0 -24 47 40 10 14 50.8 1 112 22 -24 27 55 -25 7 27 -24 16 22 -25 19 1 .... 82 0 0 -25 9 31 10 14 50.6 2 111 21 -24 49 48 -25 29 15 -24 38 17 -25 40 47 0.17 83 0 0 -25 30 58 10 14 50.2 3 111 20 -25 11 18 -25 50 40 -24 59 48 -26 2 11 0.15 84 0 0 -25 52 2 10 14 49.8 4 111 19 -25 32 24 -26 11 42 -25 20 56 -26 23 11 0.15 85 0 0 -26 12 43 10 14 49.2 5 110 18 -25 53 7 -26 32 20 -25 41 40 -26 43 48 0.15 86 0 0 -26 33 0 10 14 48.4 6 110 17 -26 13 26 -26 52 34 -26 2 1 -27 4 1 0.14 87 0 0 -26 52 53 10 14 47.5 7 109 16 -26 33 22 -27 12 25 -26 21 58 -27 23 50 0.14 88 0 0 -27 12 22 10 14 46.5 8 109 15 -26 52 53 -27 31 51 -26 41 31 -27 43 15 0.14 89 0 0 -27 31 27 10 14 45.4 9 108 14 -27 12 1 -27 50 54 -27 0 39 -28 2 17 0.14 90 0 0 -27 50 8 10 14 44.1 9 108 14 -27 30 44 -28 9 33 -27 19 24 -28 20 54 0.14 91 0 0 -28 8 25 10 14 42.8 10 107 13 -27 49 4 -28 27 48 -27 37 45 -28 39 8 0.14 92 0 0 -28 26 18 10 14 41.3 11 107 12 -28 6 59 -28 45 38 -27 55 42 -28 56 57 0.14 93 0 0 -28 43 47 10 14 39.7 12 106 11 -28 24 30 -29 3 5 -28 13 14 -29 14 22 0.14 94 0 0 -29 0 51 10 14 37.9 13 106 10 -28 41 37 -29 20 7 -28 30 22 -29 31 23 0.14 95 0 0 -29 17 31 10 14 36.1 14 105 9 -28 58 19 -29 36 45 -28 47 6 -29 47 59 0.14 96 0 0 -29 33 47 10 14 34.2 15 105 8 -29 14 37 -29 52 58 -29 3 25 -30 4 12 0.14 97 0 0 -29 49 39 10 14 32.1 16 104 7 -29 30 31 -30 8 48 -29 19 21 -30 20 0 0.14 98 0 0 -30 5 7 10 14 30.0 17 104 6 -29 46 1 -30 24 13 -29 34 52 -30 35 24 0.14 99 0 0 -30 20 10 10 14 27.7 18 103 6 -30 1 6 -30 39 14 -29 49 58 -30 50 24 0.14 100 0 0 -30 34 49 10 14 25.3 19 103 5 -30 15 47 -30 53 51 -30 4 41 -31 4 59 0.14 101 0 0 -30 49 4 10 14 22.9 19 102 4 -30 30 4 -31 8 4 -30 18 59 -31 19 11 0.14 102 0 0 -31 2 54 10 14 20.3 20 102 3 -30 43 57 -31 21 53 -30 32 53 -31 32 58 0.14 103 0 0 -31 16 21 10 14 17.7 21 101 2 -30 57 26 -31 35 17 -30 46 22 -31 46 22 0.14 104 0 0 -31 29 23 10 14 14.9 22 101 1 -31 10 30 -31 48 18 -30 59 28 -31 59 21 0.14 105 0 0 -31 42 2 10 14 12.1 23 100 0 -31 23 10 -32 0 54 -31 12 9 -32 11 57 0.14 106 0 0 -31 54 16 10 14 9.2 24 100 -1 -31 35 27 -32 13 7 -31 24 27 -32 24 8 0.14 107 0 0 -32 6 7 10 14 6.2 25 99 -1 -31 47 19 -32 24 56 -31 36 20 -32 35 56 0.14 108 0 0 -32 17 34 10 14 3.0 25 99 -2 -31 58 48 -32 36 21 -31 47 50 -32 47 20 0.14 109 0 0 -32 28 37 10 13 59.9 26 98 -3 -32 9 52 -32 47 22 -31 58 55 -32 58 20 0.14 110 0 0 -32 39 16 10 13 56.6 27 98 -4 -32 20 33 -32 57 59 -32 9 37 -33 8 57 0.14 111 0 0 -32 49 31 10 13 53.2 28 97 -5 -32 30 50 -33 8 13 -32 19 55 -33 19 9 0.14 112 0 0 -32 59 23 10 13 49.8 29 96 -6 -32 40 43 -33 18 3 -32 29 49 -33 28 59 0.14 113 0 0 -33 8 51 10 13 46.3 30 96 -6 -32 50 13 -33 27 30 -32 39 20 -33 38 25 0.14 114 0 0 -33 17 56 10 13 42.7 31 95 -7 -32 59 19 -33 36 33 -32 48 27 -33 47 27 0.14 115 0 0 -33 26 37 10 13 39.0 31 95 -8 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20 16 -26 29 57 -27 31 39 0.15 -171 0 0 -26 41 37 10 6 18.0 81 313 -69 -26 22 7 -27 1 8 -26 10 44 -27 12 33 0.15 -170 0 0 -26 22 7 10 6 10.2 80 307 -70 -26 2 34 -26 41 40 -25 51 10 -26 53 6 0.15 -169 0 0 -26 2 14 10 6 2.4 80 303 -71 -25 42 40 -26 21 49 -25 31 14 -26 33 17 0.15 -168 0 0 -25 42 0 10 5 54.6 79 298 -72 -25 22 24 -26 1 38 -25 10 57 -26 13 6 0.15 -167 0 0 -25 21 25 10 5 46.7 78 294 -73 -25 1 46 -25 41 4 -24 50 18 -25 52 34 0.15 -166 0 0 -25 0 29 10 5 38.9 78 291 -74 -24 40 48 -25 20 10 -24 29 18 -25 31 41 0.15 -165 0 0 -24 39 11 10 5 31.0 77 287 -75 -24 19 29 -24 58 55 -24 7 58 -25 10 28 0.15 -164 0 0 -24 17 34 10 5 23.1 76 285 -76 -23 57 49 -24 37 19 -23 46 17 -24 48 53 0.14 -163 0 0 -23 55 35 10 5 15.2 76 282 -77 -23 35 48 -24 15 23 -23 24 15 -24 26 58 0.14 -162 0 0 -23 33 17 10 5 7.3 75 280 -78 -23 13 28 -23 53 7 -23 1 53 -24 4 43 0.14 -161 0 0 -23 10 38 10 4 59.4 74 277 -79 -22 50 47 -23 30 30 -22 39 12 -23 42 7 0.14 -160 0 0 -22 47 40 10 4 51.5 73 275 -80 -22 27 47 -23 7 34 -22 16 10 -23 19 12 0.14 -159 0 0 -22 24 22 10 4 43.5 72 274 -81 -22 4 27 -22 44 18 -21 52 49 -22 55 58 0.14 -158 0 0 -22 0 45 10 4 35.6 71 272 -82 -21 40 49 -22 20 43 -21 29 10 -22 32 24 0.14 -157 0 0 -21 36 50 10 4 27.7 70 270 -83 -21 16 51 -21 56 49 -21 5 11 -22 8 31 0.14 -156 0 0 -21 12 35 10 4 19.8 70 269 -83 -20 52 35 -21 32 37 -20 40 54 -21 44 20 0.14 -155 0 0 -20 48 3 10 4 11.9 69 268 -84 -20 28 1 -21 8 7 -20 16 19 -21 19 50 0.14 -154 0 0 -20 23 13 10 4 4.0 68 266 -85 -20 3 9 -20 43 18 -19 51 26 -20 55 3 0.14 -153 0 0 -19 58 6 10 3 56.2 67 265 -86 -19 38 0 -20 18 13 -19 26 16 -20 29 58 0.14 -152 0 0 -19 32 41 10 3 48.3 66 264 -87 -19 12 34 -19 52 50 -19 0 48 -20 4 37 0.14 -151 0 0 -19 7 0 10 3 40.5 65 263 -88 -18 46 51 -19 27 10 -18 35 5 -19 38 58 0.14 -150 0 0 -18 41 3 10 3 32.7 64 262 -88 -18 20 52 -19 1 15 -18 9 5 -19 13 4 0.14 -149 0 0 -18 14 50 10 3 25.0 63 261 -88 -17 54 38 -18 35 3 -17 42 50 -18 46 53 0.14 -148 0 0 -17 48 22 10 3 17.3 62 260 -87 -17 28 8 -18 8 37 -17 16 19 -18 20 27 0.14 -147 0 0 -17 21 39 10 3 9.6 61 260 -87 -17 1 24 -17 41 55 -16 49 34 -17 53 47 0.14 -146 0 0 -16 54 42 10 3 2.0 60 259 -86 -16 34 26 -17 15 0 -16 22 35 -17 26 52 0.14 -145 0 0 -16 27 31 10 2 54.4 59 258 -85 -16 7 14 -16 47 50 -15 55 22 -16 59 43 0.14 -144 0 0 -16 0 7 10 2 46.8 58 257 -84 -15 39 48 -16 20 27 -15 27 56 -16 32 21 0.14 -143 0 0 -15 32 31 10 2 39.4 57 257 -83 -15 12 11 -15 52 52 -15 0 18 -16 4 46 0.14 -142 0 0 -15 4 42 10 2 32.0 56 256 -82 -14 44 21 -15 25 4 -14 32 28 -15 36 59 0.14 -141 0 0 -14 36 42 10 2 24.6 55 256 -81 -14 16 20 -14 57 5 -14 4 26 -15 9 1 0.14 -140 0 0 -14 8 31 10 2 17.3 54 255 -80 -13 48 8 -14 28 55 -13 36 13 -14 40 51 0.14 -139 0 0 -13 40 10 10 2 10.1 53 255 -79 -13 19 46 -14 0 35 -13 7 51 -14 12 31 0.14 -138 0 0 -13 11 39 10 2 3.0 52 254 -78 -12 51 14 -13 32 5 -12 39 19 -13 44 2 0.14 -137 0 0 -12 42 59 10 1 55.9 51 254 -77 -12 22 33 -13 3 26 -12 10 38 -13 15 23 0.14 -136 0 0 -12 14 11 10 1 49.0 50 253 -76 -11 53 45 -12 34 38 -11 41 48 -12 46 36 0.14 -135 0 0 -11 45 15 10 1 42.1 49 253 -75 -11 24 48 -12 5 43 -11 12 52 -12 17 41 0.14 -134 0 0 -11 16 12 10 1 35.3 48 252 -73 -10 55 45 -11 36 40 -10 43 48 -11 48 39 0.14 -133 0 0 -10 47 3 10 1 28.6 47 252 -72 -10 26 36 -11 7 32 -10 14 39 -11 19 31 0.14 -132 0 0 -10 17 49 10 1 22.0 46 252 -71 - 9 57 21 -10 38 18 - 9 45 23 -10 50 16 0.14 -131 0 0 - 9 48 29 10 1 15.5 45 251 -70 - 9 28 1 -10 8 58 - 9 16 4 -10 20 57 0.14 -130 0 0 - 9 19 6 10 1 9.1 43 251 -69 - 8 58 37 - 9 39 35 - 8 46 40 - 9 51 34 0.14 -129 0 0 - 8 49 39 10 1 2.9 42 251 -68 - 8 29 10 - 9 10 8 - 8 17 13 - 9 22 7 0.14 -128 0 0 - 8 20 9 10 0 56.7 41 250 -67 - 7 59 41 - 8 40 38 - 7 47 43 - 8 52 38 0.14 -127 0 0 - 7 50 37 10 0 50.7 40 250 -66 - 7 30 9 - 8 11 7 - 7 18 12 - 8 23 6 0.14 -126 0 0 - 7 21 5 10 0 44.8 39 250 -65 - 7 0 37 - 7 41 34 - 6 48 39 - 7 53 33 0.14 -125 0 0 - 6 51 32 10 0 39.0 38 250 -64 - 6 31 4 - 7 12 0 - 6 19 7 - 7 23 59 0.14 -124 0 0 - 6 21 59 10 0 33.4 37 250 -63 - 6 1 31 - 6 42 27 - 5 49 34 - 6 54 26 0.14 -123 0 0 - 5 52 27 10 0 27.9 36 249 -62 - 5 32 0 - 6 12 55 - 5 20 4 - 6 24 54 0.14 -122 0 0 - 5 22 57 10 0 22.5 35 249 -61 - 5 2 31 - 5 43 25 - 4 50 35 - 5 55 23 0.14 -121 0 0 - 4 53 30 10 0 17.2 34 249 -59 - 4 33 4 - 5 13 57 - 4 21 8 - 5 25 55 0.14 -120 0 0 - 4 24 7 10 0 12.1 33 249 -58 - 4 3 41 - 4 44 33 - 3 51 46 - 4 56 30 0.14 -119 0 0 - 3 54 47 10 0 7.2 32 249 -57 - 3 34 23 - 4 15 13 - 3 22 27 - 4 27 9 0.14 -118 0 0 - 3 25 32 10 0 2.4 31 249 -56 - 3 5 9 - 3 45 57 - 2 53 14 - 3 57 53 0.14 -117 0 0 - 2 56 23 9 59 57.7 29 249 -55 - 2 36 1 - 3 16 47 - 2 24 7 - 3 28 43 0.14 -116 0 0 - 2 27 21 9 59 53.2 28 248 -54 - 2 6 59 - 2 47 44 - 1 55 6 - 2 59 39 0.14 -115 0 0 - 1 58 26 9 59 48.9 27 248 -53 - 1 38 5 - 2 18 47 - 1 26 12 - 2 30 42 0.14 -114 0 0 - 1 29 38 9 59 44.7 26 248 -52 - 1 9 19 - 1 49 59 - 0 57 26 - 2 1 52 0.14 -113 0 0 - 1 0 59 9 59 40.7 25 248 -51 - 0 40 41 - 1 21 18 - 0 28 49 - 1 33 12 0.14 -112 0 0 - 0 32 30 9 59 36.8 24 248 -50 - 0 12 13 - 0 52 48 - 0 0 22 - 1 4 40 0.14 -111 0 0 - 0 4 10 9 59 33.1 23 248 -49 0 16 5 - 0 24 27 0 27 55 - 0 36 18 0.14 -110 0 0 0 23 58 9 59 29.6 22 248 -48 0 44 12 0 3 43 0 56 2 - 0 8 8 0.14 -109 0 0 0 51 56 9 59 26.2 21 248 -46 1 12 8 0 31 42 1 23 56 0 19 52 0.14 -108 0 0 1 19 41 9 59 23.0 20 248 -45 1 39 52 0 59 29 1 51 39 0 47 40 0.14 -107 0 0 1 47 13 9 59 20.0 19 248 -44 2 7 22 1 27 2 2 19 9 1 15 14 0.14 -106 0 0 2 14 32 9 59 17.1 17 248 -43 2 34 39 1 54 23 2 46 25 1 42 36 0.14 -105 0 0 2 41 36 9 59 14.4 16 248 -42 3 1 42 2 21 29 3 13 27 2 9 43 0.14 -104 0 0 3 8 26 9 59 11.9 15 248 -41 3 28 31 2 48 21 3 40 14 2 36 36 0.14 -103 0 0 3 35 1 9 59 9.6 14 248 -40 3 55 3 3 14 58 4 6 46 3 3 14 0.15 -102 0 0 4 1 20 9 59 7.4 13 248 -39 4 21 20 3 41 18 4 33 1 3 29 35 0.15 -101 0 0 4 27 22 9 59 5.4 12 248 -38 4 47 20 4 7 22 4 59 1 3 55 41 0.15 -100 0 0 4 53 7 9 59 3.5 11 248 -37 5 13 4 4 33 9 5 24 42 4 21 29 0.15 - 99 0 0 5 18 34 9 59 1.9 10 248 -36 5 38 29 4 58 39 5 50 7 4 47 0 0.15 - 98 0 0 5 43 44 9 59 0.4 9 249 -35 6 3 36 5 23 50 6 15 13 5 12 12 0.15 - 97 0 0 6 8 34 9 58 59.1 8 249 -34 6 28 25 5 48 43 6 40 0 5 37 6 0.16 - 96 0 0 6 33 6 9 58 57.9 7 249 -32 6 52 54 6 13 16 7 4 28 6 1 41 0.16 - 95 0 0 6 57 17 9 58 56.9 6 249 -31 7 17 3 6 37 30 7 28 36 6 25 56 0.17 - 94 0 0 7 21 9 9 58 56.1 5 249 -30 7 40 53 7 1 24 7 52 24 6 49 51 0.18 - 93 0 0 7 44 40 9 58 55.5 4 249 -29 8 4 22 7 24 57 8 15 52 7 13 25 0.19 - 92 0 0 8 7 50 9 58 55.0 2 249 -28 8 27 29 7 48 9 8 38 58 7 36 39 0.21 - 91 0 0 8 30 38 9 58 54.7 1 249 -27 8 50 15 8 11 0 9 1 43 7 59 31 0.27 - 90 0 0 8 53 5 9 58 54.6 0 250 -26 9 12 40 8 33 29 9 24 6 8 22 1 0.69 Uncertainty in time = +/- 3 secs Prediction of 2023 May 29.0 Data for the target star ------------------------ * name: UCAC4 350-134194 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 23 27.2982 DE: -20 07 01.589 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 23 27.2981 DE: -20 07 01.588 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.900,0.700) * V mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (943) Begonia asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.033 distance from Earth [AU]: 2.80880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.020", 0.002", 100.801° remarks: * orbital elements for (943)Begonia : Mean anomaly = 156.8804013168 deg Arg. of pericenter = 3.8773617818 deg Long. of node = 113.7482028446 deg Inclination = 12.1104189320 deg Eccentricity = 0.2139149850 Semimajor axis = 3.1152454772 AU Perihelion dist = 2.4488477877 AU Mag: H = 9.80, G = 0.15 Epoch of elements : MJD 60150.42131945 TDT (2023 Jul 25.4213) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,5.08,2023,7,25,10.114614,0.044145,-0.136294,-7.093597,-2.273556,0.002585,-0.000175,0.000001,0.000000 -178.3652,-20.1052,29.93,19.66,False UCAC4 350-134194,18.39091617,-20.1171079,0.00,11.42,0.00,0.0,0,,18.41443984,-20.1051952,4.02,0.00,0,0,0 943,Begonia,15.42,67.1,2.8088,0,0,-1.576,-7.12,,3.4,0 0,156.8049,2023,7,25,3.8774,113.7482,12.1104,0.21391,3.11525,2.44885,9.79,5.0,0.15 1.292,0.0197,0.0023,101,0.0096,Known errors,-1.00,-1,-1,-1 20230725_134194,60092.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 28, 23:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org