IOTA/IOTA-ES occultation update for (943) Begonia / UCAC4 345-133852 event on 2023 Aug 16, 02:55 UT Visible from Canada, USA Summary ------- On 2023 Aug 16 UT, the 67.1 km diameter asteroid (943) Begonia will occult a 12.3 mag star in the constellation Sagittarius for observers along a path across Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.54 mag to 15.78 mag (the magnitude of the asteroid) for at most 10.070 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 Aug 16, 02:45 - 2023 Aug 16, 03:06 * geocentric midpoint of event [JD]: 2460172.62235104 * magnitude of target star: 12.28 * magnitude drop [mag]: 3.54 * estimated maximum duration [s]: 10.070 * Moon: 0 % sunlit, 132° distance * Sun: 130° distance * rough path description: Canada, USA The occultation path -------------------- * approximate projected width [km]: 108 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.005, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.005", 0.000", 99°) * approx speed of asteroid's shadow [km/s]: 6.6628 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-133852 by 943 Begonia on 2023 Aug 16 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 179 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 15 23 30 .... -180 0 0 15 39 48 3 6 4.8 1 112 46 16 12 9 15 7 53 16 19 34 15 0 41 .... -179 0 0 15 17 52 3 6 4.2 2 112 45 15 49 57 14 46 12 15 57 19 14 39 3 -0.84 -178 0 0 14 57 8 3 6 3.1 3 113 44 15 28 58 14 25 42 15 36 16 14 18 36 -1.01 -177 0 0 14 37 35 3 6 1.6 4 113 43 15 9 12 14 6 23 15 16 26 13 59 20 -1.09 -176 0 0 14 19 12 3 5 59.5 5 113 42 14 50 35 13 48 12 14 57 47 13 41 12 -1.13 -175 0 0 14 1 58 3 5 57.0 6 113 41 14 33 9 13 31 9 14 40 18 13 24 12 -1.16 -174 0 0 13 45 52 3 5 54.1 7 114 40 14 16 52 13 15 14 14 23 58 13 8 19 -1.18 -173 0 0 13 30 53 3 5 50.7 8 114 39 14 1 43 13 0 26 14 8 46 12 53 33 -1.20 -172 0 0 13 17 1 3 5 46.9 9 114 38 13 47 40 12 46 43 13 54 42 12 39 52 -1.21 -171 0 0 13 4 14 3 5 42.7 10 114 37 13 34 45 12 34 5 13 41 44 12 27 16 -1.21 -170 0 0 12 52 33 3 5 38.0 11 115 36 13 22 55 12 22 31 13 29 52 12 15 44 -1.22 -169 0 0 12 41 55 3 5 33.0 12 115 35 13 12 10 12 12 1 13 19 6 12 5 16 -1.22 -168 0 0 12 32 21 3 5 27.5 13 115 34 13 2 29 12 2 34 13 9 23 11 55 50 -1.23 -167 0 0 12 23 51 3 5 21.7 13 116 33 12 53 52 11 54 10 13 0 45 11 47 27 -1.23 -166 0 0 12 16 23 3 5 15.5 14 116 32 12 46 18 11 46 47 12 53 9 11 40 6 -1.23 -165 0 0 12 9 56 3 5 8.9 15 116 31 12 39 47 11 40 26 12 46 37 11 33 45 -1.24 -164 0 0 12 4 32 3 5 1.9 16 116 31 12 34 18 11 35 5 12 41 7 11 28 26 -1.24 -163 0 0 12 0 8 3 4 54.6 17 117 30 12 29 50 11 30 45 12 36 38 11 24 7 -1.24 -162 0 0 11 56 45 3 4 47.0 18 117 29 12 26 24 11 27 26 12 33 11 11 20 48 -1.24 -161 0 0 11 54 22 3 4 38.9 19 117 28 12 23 59 11 25 5 12 30 45 11 18 28 -1.24 -160 0 0 11 53 0 3 4 30.6 20 118 27 12 22 34 11 23 45 12 29 20 11 17 8 -1.24 -159 0 0 11 52 37 3 4 21.8 20 118 26 12 22 9 11 23 23 12 28 55 11 16 47 -1.24 -158 0 0 11 53 13 3 4 12.8 21 118 25 12 22 44 11 24 0 12 29 30 11 17 24 -1.24 -157 0 0 11 54 48 3 4 3.4 22 119 24 12 24 19 11 25 36 12 31 5 11 19 0 -1.24 -156 0 0 11 57 22 3 3 53.7 23 119 23 12 26 54 11 28 10 12 33 39 11 21 34 -1.24 -155 0 0 12 0 55 3 3 43.7 24 120 22 12 30 27 11 31 43 12 37 13 11 25 7 -1.24 -154 0 0 12 5 27 3 3 33.4 24 120 21 12 35 0 11 36 13 12 41 46 11 29 37 -1.24 -153 0 0 12 10 57 3 3 22.8 25 120 20 12 40 32 11 41 42 12 47 19 11 35 5 -1.24 -152 0 0 12 17 26 3 3 11.9 26 121 19 12 47 3 11 48 8 12 53 50 11 41 31 -1.24 -151 0 0 12 24 53 3 3 0.6 27 121 19 12 54 32 11 55 32 13 1 20 11 48 54 -1.24 -150 0 0 12 33 18 3 2 49.1 27 122 18 13 3 1 12 3 54 13 9 49 11 57 15 -1.24 -149 0 0 12 42 41 3 2 37.3 28 123 17 13 12 28 12 13 13 13 19 18 12 6 34 -1.24 -148 0 0 12 53 3 3 2 25.2 29 123 16 13 22 55 12 23 31 13 29 45 12 16 50 -1.24 -147 0 0 13 4 23 3 2 12.8 29 124 15 13 34 20 12 34 46 13 41 12 12 28 5 -1.24 -146 0 0 13 16 42 3 2 0.2 30 124 14 13 46 44 12 46 59 13 53 37 12 40 17 -1.24 -145 0 0 13 29 59 3 1 47.2 31 125 13 14 0 8 13 0 11 14 7 2 12 53 26 -1.24 -144 0 0 13 44 15 3 1 34.1 31 126 12 14 14 31 13 14 20 14 21 27 13 7 34 -1.24 -143 0 0 13 59 30 3 1 20.6 32 126 12 14 29 53 13 29 28 14 36 51 13 22 41 -1.24 -142 0 0 14 15 44 3 1 6.9 33 127 11 14 46 15 13 45 34 14 53 15 13 38 45 -1.24 -141 0 0 14 32 57 3 0 52.9 33 128 10 15 3 37 14 2 39 15 10 39 13 55 48 -1.24 -140 0 0 14 51 10 3 0 38.7 34 128 9 15 21 59 14 20 43 15 29 3 14 13 50 -1.24 -139 0 0 15 10 23 3 0 24.3 34 129 8 15 41 22 14 39 46 15 48 28 14 32 51 -1.24 -138 0 0 15 30 36 3 0 9.6 35 130 7 16 1 45 14 59 49 16 8 54 14 52 51 -1.24 -137 0 0 15 51 49 2 59 54.7 35 131 7 16 23 10 15 20 51 16 30 21 15 13 51 -1.25 -136 0 0 16 14 3 2 59 39.5 35 132 6 16 45 36 15 42 54 16 52 50 15 35 51 -1.25 -135 0 0 16 37 19 2 59 24.1 36 133 5 17 9 4 16 5 57 17 16 21 15 58 52 -1.25 -134 0 0 17 1 36 2 59 8.5 36 134 4 17 33 35 16 30 1 17 40 55 16 22 53 -1.25 -133 0 0 17 26 54 2 58 52.7 37 135 4 17 59 8 16 55 6 18 6 31 16 47 55 -1.25 -132 0 0 17 53 16 2 58 36.8 37 136 3 18 25 45 17 21 12 18 33 12 17 13 58 -1.25 -131 0 0 18 20 40 2 58 20.6 37 137 2 18 53 25 17 48 21 19 0 56 17 41 4 -1.25 -130 0 0 18 49 8 2 58 4.2 37 138 1 19 22 9 18 16 33 19 29 44 18 9 12 -1.25 -129 0 0 19 18 39 2 57 47.6 38 139 1 19 51 59 18 45 47 19 59 38 18 38 22 -1.25 -128 0 0 19 49 16 2 57 30.9 38 140 0 20 22 54 19 16 6 20 30 37 19 8 37 -1.26 -127 0 0 20 20 57 2 57 14.0 38 141 -1 20 54 55 19 47 28 21 2 43 19 39 55 -1.26 -126 0 0 20 53 44 2 56 56.9 38 142 -2 21 28 3 20 19 55 21 35 56 20 12 17 -1.26 -125 0 0 21 27 37 2 56 39.7 38 143 -2 22 2 18 20 53 27 22 10 16 20 45 45 -1.26 -124 0 0 22 2 38 2 56 22.3 38 144 -3 22 37 42 21 28 6 22 45 46 21 20 19 -1.26 -123 0 0 22 38 46 2 56 4.9 38 145 -4 23 14 15 22 3 51 23 22 24 21 55 59 -1.27 -122 0 0 23 16 3 2 55 47.3 38 147 -4 23 51 58 22 40 43 24 0 13 22 32 45 -1.27 -121 0 0 23 54 29 2 55 29.5 38 148 -5 24 30 51 23 18 43 24 39 12 23 10 40 -1.27 -120 0 0 24 34 5 2 55 11.7 38 149 -5 25 10 56 23 57 52 25 19 24 23 49 43 -1.27 -119 0 0 25 14 52 2 54 53.9 38 150 -6 25 52 13 24 38 11 26 0 48 24 29 55 -1.28 -118 0 0 25 56 51 2 54 35.9 38 151 -7 26 34 44 25 19 39 26 43 26 25 11 17 -1.28 -117 0 0 26 40 3 2 54 17.9 37 153 -7 27 18 29 26 2 19 27 27 20 25 53 50 -1.28 -116 0 0 27 24 28 2 53 59.8 37 154 -8 28 3 30 26 46 11 28 12 29 26 37 34 -1.28 -115 0 0 28 10 8 2 53 41.7 37 155 -8 28 49 47 27 31 16 28 58 55 27 22 31 -1.29 -114 0 0 28 57 4 2 53 23.6 36 156 -9 29 37 23 28 17 34 29 46 40 28 8 41 -1.29 -113 0 0 29 45 17 2 53 5.5 36 158 -9 30 26 18 29 5 7 30 35 45 28 56 5 -1.29 -112 0 0 30 34 47 2 52 47.5 36 159 -10 31 16 33 29 53 56 31 26 11 29 44 45 -1.29 -111 0 0 31 25 37 2 52 29.4 35 160 -10 32 8 10 30 44 1 32 18 0 30 34 41 -1.30 -110 0 0 32 17 47 2 52 11.4 34 161 -10 33 1 11 31 35 24 33 11 12 31 25 54 -1.30 -109 0 0 33 11 19 2 51 53.6 34 162 -11 33 55 37 32 28 7 34 5 51 32 18 25 -1.30 -108 0 0 34 6 15 2 51 35.8 33 164 -11 34 51 30 33 22 9 35 1 57 33 12 16 -1.31 -107 0 0 35 2 35 2 51 18.1 33 165 -11 35 48 51 34 17 33 35 59 34 34 7 28 -1.31 -106 0 0 36 0 22 2 51 0.6 32 166 -12 36 47 43 35 14 19 36 58 41 35 4 1 -1.31 -105 0 0 36 59 37 2 50 43.3 31 167 -12 37 48 9 36 12 30 37 59 24 36 1 58 -1.32 -104 0 0 38 0 22 2 50 26.1 30 168 -12 38 50 9 37 12 6 39 1 43 37 1 19 -1.32 -103 0 0 39 2 39 2 50 9.2 29 169 -12 39 53 48 38 13 10 40 5 41 38 2 7 -1.32 -102 0 0 40 6 31 2 49 52.6 28 170 -12 40 59 7 39 15 42 41 11 21 39 4 22 -1.33 -101 0 0 41 11 59 2 49 36.2 27 171 -12 42 6 10 40 19 44 42 18 48 40 8 6 -1.33 -100 0 0 42 19 6 2 49 20.2 26 173 -12 43 15 1 41 25 19 43 28 4 41 13 22 -1.33 - 99 0 0 43 27 55 2 49 4.5 25 174 -12 44 25 43 42 32 29 44 39 14 42 20 10 -1.34 - 98 0 0 44 38 30 2 48 49.2 24 175 -12 45 38 21 43 41 15 45 52 22 43 28 33 -1.34 - 97 0 0 45 50 53 2 48 34.4 23 176 -12 46 53 1 44 51 40 47 7 36 44 38 33 -1.35 - 96 0 0 47 5 10 2 48 20.0 22 177 -12 48 9 48 46 3 47 48 25 1 45 50 14 -1.35 - 95 0 0 48 21 25 2 48 6.2 21 178 -12 49 28 50 47 17 39 49 44 45 47 3 36 -1.35 - 94 0 0 49 39 43 2 47 52.9 19 178 -11 50 50 16 48 33 20 51 6 59 48 18 44 -1.36 - 93 0 0 51 0 11 2 47 40.2 18 179 -11 52 14 16 49 50 52 52 31 54 49 35 41 -1.36 - 92 0 0 52 22 57 2 47 28.2 17 180 -11 53 41 4 51 10 22 53 59 45 50 54 31 -1.37 - 91 0 0 53 48 10 2 47 16.9 15 181 -10 55 10 56 52 31 54 55 30 52 52 15 19 -1.38 - 90 0 0 55 16 3 2 47 6.4 14 182 -10 56 44 15 53 55 35 57 5 39 53 38 9 -1.38 - 89 0 0 56 46 49 2 46 56.7 12 183 -9 58 21 30 55 21 32 58 44 43 55 3 10 -1.39 - 88 0 0 58 20 50 2 46 47.9 11 184 -8 60 3 23 56 49 54 60 28 53 56 30 28 -1.41 - 87 0 0 59 58 31 2 46 40.2 9 185 -7 61 50 57 58 20 55 62 19 27 58 0 14 -1.43 - 86 0 0 61 40 31 2 46 33.6 7 186 -7 63 45 51 59 54 49 64 18 31 59 32 40 -1.45 - 85 0 0 63 27 44 2 46 28.2 5 187 -6 65 50 58 61 31 57 66 30 7 61 8 5 -1.51 - 84 0 1 65 21 38 2 46 24.2 3 188 -4 68 12 26 63 12 50 .. .. .. 62 46 50 -1.63 - 83 0 1 67 24 46 2 46 21.9 1 188 -3 .. .. .. 64 58 10 .. .. .. 64 29 29 -2.17 - 82 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 66 49 3 .. .. .. 66 16 52 .... - 81 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 68 10 16 .... Uncertainty in time = +/- 2 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: UCAC4 345-133852 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 13 35.4050 DE: -21 04 51.962 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 13 35.4050 DE: -21 04 51.962 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (943) Begonia asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.031 distance from Earth [AU]: 3.01940 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 date of fit: 2023 Jul 30 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): 0.005", 0.000", 99.479° remarks: * orbital elements for (943)Begonia : Mean anomaly = 160.7752719933 deg Arg. of pericenter = 3.8735217970 deg Long. of node = 113.7480169216 deg Inclination = 12.1106249276 deg Eccentricity = 0.2139433914 Semimajor axis = 3.1151623903 AU Perihelion dist = 2.4486939839 AU Mag: H = 9.79, G = 0.15 Epoch of elements : MJD 60172.12208333 TDT (2023 Aug 16.1221) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Jul30,10.07,2023,8,16,2.936425,-0.445700,0.645174,-3.094169,-2.137444,0.004405,-0.000040,0.000001,0.000000 -94.5459,-21.0750,137.07,13.84,False UCAC4 345-133852,18.22650141,-21.0811006,0.00,12.28,0.00,0.0,0,,18.25018063,-21.0749618,3.54,0.00,0,0,0 943,Begonia,15.78,67.100,3.0194,0,0,-0.643,-6.23,,3.4,0 0,160.7534,2023,8,16,3.8735,113.7480,12.1106,0.21394,3.11516,2.44869,9.79,5.0,0.15 1.114,0.0050,0.0003,99,0.0050,Known errors,-1.00,0,-1,-1 20230816_133852,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org