IOTA/IOTA-ES occultation update for (1057) Wanda / UCAC4 339-129210 event on 2023 Jun 09, 07:31 UT Visible from USA Summary ------- On 2023 Jun 09 UT, the 43.7 km diameter asteroid (1057) Wanda will occult a 13.2 mag star in the constellation Sagittarius for observers along a path across USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.16 mag to 15.23 mag (the magnitude of the asteroid) for at most 4.050 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: 78 * date and approx. time of event: 2023 Jun 09, 07:26 - 2023 Jun 09, 07:36 * geocentric midpoint of event [JD]: 2460104.81324000 * magnitude of target star: 13.23 * magnitude drop [mag]: 2.16 * estimated maximum duration [s]: 4.050 * Moon: 67 % sunlit, 53° distance * Sun: 163° distance * rough path description: USA The occultation path -------------------- * approximate projected width [km]: 91 * 1 sigma uncertainty interval [path widths]: +/- 0.70 * 1 sigma uncertainty interval [seconds]: +/- 5.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.046, +/- 0.022) * 1 sigma uncertainty ellipse (major, minor, PA): (0.046", 0.021", 85°) * approx speed of asteroid's shadow [km/s]: 10.7868 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 339-129210 by 1057 Wanda on 2023 Jun 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 -147 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 56 57 4 .... -146 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 57 13 43 .. .. .. 56 25 18 .... -145 0 0 57 16 49 7 35 44.1 1 136 -6 57 52 56 56 41 41 .. .. .. 55 53 43 .... -144 0 0 56 44 38 7 35 43.8 1 137 -7 57 20 22 56 9 51 58 12 23 55 22 21 -1.12 -143 0 0 56 12 41 7 35 43.3 2 137 -7 56 48 2 55 38 14 57 39 28 54 51 12 -1.39 -142 0 0 55 40 59 7 35 42.6 3 138 -8 56 15 58 55 6 53 57 6 49 54 20 17 -1.52 -141 0 0 55 9 34 7 35 41.7 4 139 -9 55 44 10 54 35 48 56 34 27 53 49 39 -1.60 -140 0 0 54 38 26 7 35 40.5 4 140 -9 55 12 41 54 5 1 56 2 25 53 19 18 -1.65 -139 0 0 54 7 38 7 35 39.1 5 141 -10 54 41 31 53 34 32 55 30 42 52 49 15 -1.68 -138 0 0 53 37 10 7 35 37.5 6 141 -11 54 10 43 53 4 24 54 59 21 52 19 31 -1.71 -137 0 0 53 7 3 7 35 35.7 7 142 -12 53 40 15 52 34 36 54 28 23 51 50 8 -1.73 -136 0 0 52 37 18 7 35 33.6 8 143 -12 53 10 11 52 5 10 53 57 48 51 21 7 -1.75 -135 0 0 52 7 57 7 35 31.3 8 144 -13 52 40 30 51 36 7 53 27 37 50 52 28 -1.76 -134 0 0 51 39 0 7 35 28.8 9 145 -14 52 11 14 51 7 28 52 57 52 50 24 12 -1.77 -133 0 0 51 10 28 7 35 26.1 10 146 -14 51 42 24 50 39 14 52 28 33 49 56 20 -1.78 -132 0 0 50 42 22 7 35 23.1 10 146 -15 51 14 0 50 11 25 51 59 41 49 28 54 -1.79 -131 0 0 50 14 43 7 35 19.9 11 147 -15 50 46 3 49 44 2 51 31 17 49 1 53 -1.80 -130 0 0 49 47 31 7 35 16.6 12 148 -16 50 18 34 49 17 7 51 3 22 48 35 18 -1.80 -129 0 0 49 20 48 7 35 13.0 13 149 -17 49 51 33 48 50 39 50 35 56 48 9 11 -1.81 -128 0 0 48 54 33 7 35 9.2 13 150 -17 49 25 2 48 24 39 50 9 0 47 43 32 -1.81 -127 0 0 48 28 47 7 35 5.2 14 150 -18 48 59 1 47 59 8 49 42 35 47 18 21 -1.81 -126 0 0 48 3 32 7 35 1.0 15 151 -18 48 33 30 47 34 7 49 16 41 46 53 39 -1.82 -125 0 0 47 38 47 7 34 56.7 15 152 -19 48 8 30 47 9 36 48 51 18 46 29 26 -1.82 -124 0 0 47 14 32 7 34 52.1 16 153 -19 47 44 1 46 45 36 48 26 28 46 5 44 -1.82 -123 0 0 46 50 50 7 34 47.4 17 154 -20 47 20 5 46 22 6 48 2 11 45 42 32 -1.83 -122 0 0 46 27 39 7 34 42.4 17 155 -20 46 56 40 45 59 8 47 38 26 45 19 51 -1.83 -121 0 0 46 5 1 7 34 37.3 18 155 -21 46 33 49 45 36 43 47 15 15 44 57 41 -1.83 -120 0 0 45 42 55 7 34 32.1 19 156 -21 46 11 31 45 14 49 46 52 38 44 36 4 -1.83 -119 0 0 45 21 23 7 34 26.6 19 157 -22 45 49 46 44 53 28 46 30 35 44 14 58 -1.83 -118 0 0 45 0 23 7 34 21.1 20 158 -22 45 28 35 44 32 40 46 9 6 43 54 25 -1.83 -117 0 0 44 39 58 7 34 15.3 20 159 -23 45 7 58 44 12 26 45 48 12 43 34 25 -1.84 -116 0 0 44 20 7 7 34 9.4 21 160 -23 44 47 56 43 52 45 45 27 53 43 14 58 -1.84 -115 0 0 44 0 50 7 34 3.4 21 161 -23 44 28 29 43 33 38 45 8 10 42 56 5 -1.84 -114 0 0 43 42 8 7 33 57.2 22 162 -24 44 9 36 43 15 6 44 49 2 42 37 45 -1.84 -113 0 0 43 24 0 7 33 50.9 22 163 -24 43 51 19 42 57 7 44 30 30 42 19 59 -1.84 -112 0 0 43 6 28 7 33 44.5 23 163 -24 43 33 37 42 39 44 44 12 35 42 2 48 -1.84 -111 0 0 42 49 30 7 33 38.0 23 164 -24 43 16 31 42 22 55 43 55 15 41 46 11 -1.84 -110 0 0 42 33 9 7 33 31.3 24 165 -25 43 0 0 42 6 42 43 38 31 41 30 8 -1.84 -109 0 0 42 17 22 7 33 24.5 24 166 -25 42 44 6 41 51 3 43 22 25 41 14 40 -1.84 -108 0 0 42 2 12 7 33 17.6 25 167 -25 42 28 47 41 36 0 43 6 55 40 59 47 -1.84 -107 0 0 41 47 37 7 33 10.7 25 168 -25 42 14 5 41 21 33 42 52 1 40 45 29 -1.84 -106 0 0 41 33 39 7 33 3.6 26 169 -25 41 59 59 41 7 41 42 37 45 40 31 47 -1.84 -105 0 0 41 20 16 7 32 56.5 26 170 -25 41 46 30 40 54 25 42 24 6 40 18 40 -1.84 -104 0 0 41 7 31 7 32 49.2 26 171 -26 41 33 38 40 41 46 42 11 4 40 6 8 -1.84 -103 0 0 40 55 21 7 32 41.9 26 172 -26 41 21 22 40 29 42 41 58 39 39 54 12 -1.84 -102 0 0 40 43 48 7 32 34.5 27 173 -26 41 9 43 40 18 14 41 46 51 39 42 52 -1.84 -101 0 0 40 32 51 7 32 27.1 27 174 -26 40 58 41 40 7 23 41 35 41 39 32 8 -1.84 -100 0 0 40 22 31 7 32 19.6 27 175 -26 40 48 16 39 57 8 41 25 9 39 21 59 -1.84 - 99 0 0 40 12 48 7 32 12.1 28 176 -26 40 38 28 39 47 29 41 15 14 39 12 26 -1.84 - 98 0 0 40 3 41 7 32 4.5 28 177 -26 40 29 17 39 38 27 41 5 56 39 3 30 -1.84 - 97 0 0 39 55 12 7 31 56.8 28 178 -26 40 20 43 39 30 1 40 57 16 38 55 10 -1.84 - 96 0 0 39 47 19 7 31 49.1 28 179 -25 40 12 47 39 22 12 40 49 14 38 47 26 -1.84 - 95 0 0 39 40 4 7 31 41.4 28 180 -25 40 5 28 39 15 0 40 41 50 38 40 18 -1.85 - 94 0 0 39 33 25 7 31 33.7 28 181 -25 39 58 46 39 8 24 40 35 4 38 33 46 -1.85 - 93 0 0 39 27 23 7 31 26.0 28 182 -25 39 52 42 39 2 25 40 28 55 38 27 51 -1.85 - 92 0 0 39 21 59 7 31 18.2 28 183 -25 39 47 15 38 57 3 40 23 24 38 22 32 -1.85 - 91 0 0 39 17 12 7 31 10.4 28 184 -25 39 42 25 38 52 18 40 18 31 38 17 50 -1.85 - 90 0 0 39 13 2 7 31 2.6 28 185 -24 39 38 13 38 48 10 40 14 17 38 13 44 -1.85 - 89 0 0 39 9 29 7 30 54.9 28 186 -24 39 34 39 38 44 39 40 10 40 38 10 15 -1.85 - 88 0 0 39 6 33 7 30 47.1 28 187 -24 39 31 42 38 41 45 40 7 41 38 7 23 -1.85 - 87 0 0 39 4 15 7 30 39.4 28 188 -24 39 29 23 38 39 28 40 5 20 38 5 7 -1.85 - 86 0 0 39 2 34 7 30 31.6 28 189 -23 39 27 42 38 37 47 40 3 38 38 3 28 -1.85 - 85 0 0 39 1 31 7 30 23.9 28 190 -23 39 26 38 38 36 44 40 2 33 38 2 25 -1.85 - 84 0 0 39 1 5 7 30 16.2 28 191 -23 39 26 11 38 36 18 40 2 7 38 1 59 -1.85 - 83 0 0 39 1 16 7 30 8.6 28 192 -22 39 26 23 38 36 29 40 2 19 38 2 10 -1.85 - 82 0 0 39 2 5 7 30 1.0 28 193 -22 39 27 12 38 37 18 40 3 9 38 2 58 -1.85 - 81 0 0 39 3 31 7 29 53.5 27 194 -21 39 28 39 38 38 43 40 4 37 38 4 22 -1.85 - 80 0 0 39 5 35 7 29 45.9 27 195 -21 39 30 44 38 40 46 40 6 43 38 6 23 -1.85 - 79 0 0 39 8 16 7 29 38.5 27 196 -21 39 33 26 38 43 25 40 9 28 38 9 1 -1.86 - 78 0 0 39 11 34 7 29 31.1 27 197 -20 39 36 47 38 46 42 40 12 51 38 12 16 -1.86 - 77 0 0 39 15 30 7 29 23.8 26 198 -20 39 40 45 38 50 36 40 16 52 38 16 7 -1.86 - 76 0 0 39 20 4 7 29 16.6 26 199 -19 39 45 21 38 55 8 40 21 31 38 20 36 -1.86 - 75 0 0 39 25 15 7 29 9.4 26 200 -19 39 50 34 39 0 16 40 26 48 38 25 41 -1.86 - 74 0 0 39 31 3 7 29 2.3 25 201 -18 39 56 26 39 6 2 40 32 44 38 31 23 -1.86 - 73 0 0 39 37 29 7 28 55.3 25 202 -18 40 2 55 39 12 25 40 39 18 38 37 41 -1.86 - 72 0 0 39 44 33 7 28 48.4 25 203 -17 40 10 2 39 19 25 40 46 30 38 44 37 -1.86 - 71 0 0 39 52 13 7 28 41.6 24 204 -16 40 17 46 39 27 1 40 54 21 38 52 8 -1.87 - 70 0 0 40 0 31 7 28 34.9 24 205 -16 40 26 9 39 35 15 41 2 49 39 0 17 -1.87 - 69 0 0 40 9 27 7 28 28.3 23 205 -15 40 35 9 39 44 7 41 11 56 39 9 2 -1.87 - 68 0 0 40 19 0 7 28 21.9 23 206 -15 40 44 46 39 53 35 41 21 41 39 18 24 -1.87 - 67 0 0 40 29 10 7 28 15.5 22 207 -14 40 55 2 40 3 40 41 32 4 39 28 22 -1.87 - 66 0 0 40 39 57 7 28 9.3 22 208 -13 41 5 55 40 14 22 41 43 5 39 38 57 -1.87 - 65 0 0 40 51 22 7 28 3.2 21 209 -13 41 17 25 40 25 41 41 54 45 39 50 9 -1.88 - 64 0 0 41 3 23 7 27 57.2 21 210 -12 41 29 33 40 37 36 42 7 2 40 1 56 -1.88 - 63 0 0 41 16 2 7 27 51.4 20 211 -11 41 42 18 40 50 9 42 19 57 40 14 20 -1.88 - 62 0 0 41 29 18 7 27 45.7 20 211 -11 41 55 41 41 3 18 42 33 30 40 27 20 -1.88 - 61 0 0 41 43 10 7 27 40.2 19 212 -10 42 9 41 41 17 3 42 47 41 40 40 56 -1.88 - 60 0 0 41 57 40 7 27 34.8 19 213 -9 42 24 18 41 31 25 43 2 29 40 55 9 -1.88 - 59 0 0 42 12 46 7 27 29.6 18 214 -9 42 39 32 41 46 24 43 17 55 41 9 57 -1.89 - 58 0 0 42 28 28 7 27 24.6 17 215 -8 42 55 23 42 1 58 43 33 59 41 25 21 -1.89 - 57 0 0 42 44 47 7 27 19.7 17 216 -7 43 11 51 42 18 9 43 50 39 41 41 20 -1.89 - 56 0 0 43 1 42 7 27 15.0 16 216 -6 43 28 55 42 34 55 44 7 58 41 57 55 -1.89 - 55 0 0 43 19 14 7 27 10.5 15 217 -6 43 46 36 42 52 17 44 25 53 42 15 5 -1.90 - 54 0 0 43 37 21 7 27 6.1 15 218 -5 44 4 53 43 10 15 44 44 25 42 32 50 -1.90 - 53 0 0 43 56 4 7 27 2.0 14 219 -4 44 23 46 43 28 48 45 3 33 42 51 10 -1.90 - 52 0 0 44 15 22 7 26 58.0 13 219 -3 44 43 15 43 47 56 45 23 19 43 10 4 -1.90 - 51 0 0 44 35 16 7 26 54.2 13 220 -3 45 3 20 44 7 39 45 43 41 43 29 33 -1.91 - 50 0 0 44 55 44 7 26 50.7 12 221 -2 45 24 1 44 27 57 46 4 38 43 49 36 -1.91 - 49 0 0 45 16 48 7 26 47.3 11 222 -1 45 45 16 44 48 49 46 26 12 44 10 12 -1.91 - 48 0 0 45 38 26 7 26 44.1 10 222 0 46 7 7 45 10 15 46 48 21 44 31 23 -1.92 - 47 0 0 46 0 38 7 26 41.2 10 223 0 46 29 31 45 32 14 47 11 5 44 53 6 -1.92 - 46 0 0 46 23 23 7 26 38.5 9 224 1 46 52 30 45 54 48 47 34 24 45 15 23 -1.93 - 45 0 0 46 46 43 7 26 35.9 8 225 2 47 16 3 46 17 54 47 58 18 45 38 11 -1.93 - 44 0 0 47 10 35 7 26 33.6 7 225 3 47 40 10 46 41 32 48 22 46 46 1 32 -1.94 - 43 0 0 47 34 59 7 26 31.6 7 226 4 48 4 49 47 5 43 48 47 47 46 25 24 -1.94 - 42 0 0 47 59 56 7 26 29.7 6 227 4 48 30 1 47 30 25 49 13 22 46 49 48 -1.95 - 41 0 0 48 25 24 7 26 28.1 5 228 5 48 55 44 47 55 38 49 39 29 47 14 41 -1.97 - 40 0 0 48 51 23 7 26 26.7 4 228 6 49 21 59 48 21 22 50 6 9 47 40 5 -1.98 - 39 0 0 49 17 52 7 26 25.6 4 229 7 49 48 45 48 47 36 50 33 20 48 5 58 -2.00 - 38 0 0 49 44 51 7 26 24.7 3 230 7 50 16 1 49 14 18 51 1 1 48 32 20 -2.03 - 37 0 0 50 12 19 7 26 24.0 2 231 8 50 43 47 49 41 30 51 29 14 48 59 10 -2.09 - 36 0 0 50 40 15 7 26 23.5 1 232 9 51 12 1 50 9 9 51 57 55 49 26 27 -2.23 - 35 0 0 51 8 39 7 26 23.3 0 232 10 51 40 43 50 37 15 .. .. .. 49 54 10 -2.85 - 34 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 50 22 20 .... Uncertainty in time = +/- 6 secs Prediction of 2023 May 12.0 Data for the target star ------------------------ * name: UCAC4 339-129210 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 19 42.1173 DE: -22 20 30.700 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 19 42.1173 DE: -22 20 30.700 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 13.2 * B mag [mag]: 13.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1057) Wanda asteroid class: approx. diameter [km]: 44 approx. diameter ["]: 0.032 distance from Earth [AU]: 1.90010 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.046", 0.021", 84.8° remarks: * orbital elements for (1057)Wanda : Mean anomaly = 284.6024772800 deg Arg. of pericenter = 114.8845771915 deg Long. of node = 257.8412347237 deg Inclination = 3.5418243979 deg Eccentricity = 0.2475434092 Semimajor axis = 2.8924324402 AU Perihelion dist = 2.1764298532 AU Mag: H = 11.05, G = 0.15 Epoch of elements : MJD 60104.31324383 TDT (2023 Jun 09.3132) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,4.05,2023,6,9,7.517760,0.064012,0.875566,-6.072142,0.443957,-0.001627,-0.000152,0.000001,0.000000 -94.8998,-22.3322,67.04,22.92,False UCAC4 339-129210,18.32836592,-22.3418611,13.87,13.23,12.88,0.0,0,,18.35215344,-22.3322040,2.16,2.07,0,0,1 1057,Wanda,15.23,43.7,1.9001,0,0,-2.025,2.05,,2.2,0 0,284.5397,2023,6,9,114.8846,257.8412,3.5418,0.24754,2.89243,2.17643,11.07,5.0,0.15 1.703,0.0457,0.0213,85,0.0223,Known errors,0.81,-1,-1,-1 20230609_129210,60075.98 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 11, 23:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org