IOTA/IOTA-ES occultation update for (1057) Wanda / UCAC4 334-163431 event on 2023 Apr 07, 10:23 UT Visible from USA Summary ------- On 2023 Apr 07 UT, the 43.7 km diameter asteroid (1057) Wanda will occult a 12.1 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 4.48 mag to 16.59 mag (the magnitude of the asteroid) for at most 3.830 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: 79 * date and approx. time of event: 2023 Apr 07, 10:18 - 2023 Apr 07, 10:28 * geocentric midpoint of event [JD]: 2460041.93303325 * magnitude of target star: 12.13 * magnitude drop [mag]: 4.48 * estimated maximum duration [s]: 3.830 * Moon: 98 % sunlit, 65° distance * Sun: 101° distance * rough path description: USA The occultation path -------------------- * approximate projected width [km]: 88 * 1 sigma uncertainty interval [path widths]: +/- 0.68 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.031, +/- 0.016) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.015", 84°) * approx speed of asteroid's shadow [km/s]: 11.4115 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 334-163431 by 1057 Wanda on 2023 Apr 7 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 -136 0 0 .. .. .... .. .. .. .. .. .. 46 48 17 .. .. .. 46 9 31 .. .. .. .... -135 0 0 46 47 57 10 18 58.4 1 126 -34 46 19 17 47 17 9 45 40 49 .. .. .. .... -134 0 0 46 19 13 10 18 58.7 1 127 -34 45 50 47 46 48 9 45 12 38 47 28 39 -1.01 -133 0 0 45 51 0 10 18 59.2 2 127 -34 45 22 49 46 19 41 44 44 58 46 59 49 -1.28 -132 0 0 45 23 21 10 19 0.0 3 128 -34 44 55 23 45 51 47 44 17 50 46 31 34 -1.40 -131 0 0 44 56 15 10 19 1.0 4 129 -34 44 28 30 45 24 28 43 51 15 46 3 54 -1.47 -130 0 0 44 29 43 10 19 2.2 5 130 -34 44 2 12 44 57 42 43 25 13 45 36 49 -1.52 -129 0 0 44 3 47 10 19 3.7 6 130 -34 43 36 28 44 31 33 42 59 45 45 10 20 -1.55 -128 0 0 43 38 26 10 19 5.4 6 131 -34 43 11 19 44 5 59 42 34 52 44 44 28 -1.58 -127 0 0 43 13 41 10 19 7.4 7 132 -34 42 46 46 43 41 2 42 10 34 44 19 14 -1.60 -126 0 0 42 49 34 10 19 9.6 8 132 -34 42 22 49 43 16 43 41 46 52 43 54 37 -1.61 -125 0 0 42 26 3 10 19 12.0 9 133 -34 41 59 30 42 53 1 41 23 47 43 30 39 -1.63 -124 0 0 42 3 11 10 19 14.7 10 134 -34 41 36 48 42 29 58 41 1 18 43 7 19 -1.64 -123 0 0 41 40 57 10 19 17.6 11 135 -34 41 14 44 42 7 34 40 39 28 42 44 40 -1.65 -122 0 0 41 19 22 10 19 20.7 11 135 -34 40 53 19 41 45 49 40 18 15 42 22 40 -1.65 -121 0 0 40 58 27 10 19 24.0 12 136 -33 40 32 33 41 24 44 39 57 41 42 1 21 -1.66 -120 0 0 40 38 12 10 19 27.6 13 137 -33 40 12 27 41 4 19 39 37 47 41 40 43 -1.67 -119 0 0 40 18 37 10 19 31.4 14 137 -33 39 53 1 40 44 35 39 18 32 41 20 46 -1.67 -118 0 0 39 59 43 10 19 35.4 14 138 -33 39 34 15 40 25 33 38 59 56 41 1 31 -1.68 -117 0 0 39 41 30 10 19 39.6 15 139 -32 39 16 10 40 7 11 38 42 2 40 42 58 -1.69 -116 0 0 39 23 58 10 19 44.0 16 140 -32 38 58 46 39 49 32 38 24 47 40 25 7 -1.69 -115 0 0 39 7 9 10 19 48.6 17 141 -31 38 42 3 39 32 35 38 8 14 40 8 0 -1.69 -114 0 0 38 51 1 10 19 53.4 17 141 -31 38 26 3 39 16 20 37 52 22 39 51 35 -1.70 -113 0 0 38 35 36 10 19 58.4 18 142 -31 38 10 44 39 0 49 37 37 12 39 35 54 -1.70 -112 0 0 38 20 54 10 20 3.6 19 143 -30 37 56 8 38 46 0 37 22 44 39 20 56 -1.71 -111 0 0 38 6 55 10 20 8.9 19 144 -30 37 42 15 38 31 55 37 8 58 39 6 42 -1.71 -110 0 0 37 53 39 10 20 14.5 20 145 -29 37 29 4 38 18 34 36 55 55 38 53 12 -1.71 -109 0 0 37 41 7 10 20 20.2 21 145 -29 37 16 37 38 5 56 36 43 35 38 40 27 -1.72 -108 0 0 37 29 18 10 20 26.1 21 146 -28 37 4 53 37 54 2 36 31 57 38 28 26 -1.72 -107 0 0 37 18 14 10 20 32.2 22 147 -28 36 53 53 37 42 53 36 21 3 38 17 11 -1.72 -106 0 0 37 7 53 10 20 38.4 22 148 -27 36 43 37 37 32 29 36 10 52 38 6 40 -1.72 -105 0 0 36 58 18 10 20 44.7 23 149 -26 36 34 5 37 22 49 36 1 25 37 56 55 -1.73 -104 0 0 36 49 26 10 20 51.2 24 150 -26 36 25 17 37 13 54 35 52 42 37 47 55 -1.73 -103 0 0 36 41 20 10 20 57.9 24 151 -25 36 17 14 37 5 44 35 44 43 37 39 40 -1.73 -102 0 0 36 33 58 10 21 4.7 25 151 -24 36 9 55 36 58 20 35 37 28 37 32 11 -1.73 -101 0 0 36 27 22 10 21 11.6 25 152 -24 36 3 21 36 51 41 35 30 57 37 25 28 -1.74 -100 0 0 36 21 30 10 21 18.6 26 153 -23 35 57 32 36 45 47 35 25 10 37 19 31 -1.74 - 99 0 0 36 16 24 10 21 25.8 26 154 -22 35 52 28 36 40 39 35 20 8 37 14 20 -1.74 - 98 0 0 36 12 3 10 21 33.1 26 155 -22 35 48 8 36 36 16 35 15 51 37 9 55 -1.74 - 97 0 0 36 8 28 10 21 40.4 27 156 -21 35 44 34 36 32 39 35 12 19 37 6 17 -1.74 - 96 0 0 36 5 38 10 21 47.9 27 157 -20 35 41 45 36 29 49 35 9 31 37 3 25 -1.75 - 95 0 0 36 3 34 10 21 55.5 28 158 -19 35 39 42 36 27 44 35 7 29 37 1 19 -1.75 - 94 0 0 36 2 16 10 22 3.1 28 159 -19 35 38 24 36 26 25 35 6 11 37 0 0 -1.75 - 93 0 0 36 1 43 10 22 10.9 28 160 -18 35 37 51 36 25 52 35 5 39 36 59 27 -1.75 - 92 0 0 36 1 56 10 22 18.7 28 161 -17 35 38 4 36 26 6 35 5 51 36 59 41 -1.75 - 91 0 0 36 2 55 10 22 26.6 29 162 -16 35 39 3 36 27 5 35 6 49 37 0 41 -1.75 - 90 0 0 36 4 40 10 22 34.5 29 163 -16 35 40 47 36 28 51 35 8 32 37 2 28 -1.75 - 89 0 0 36 7 11 10 22 42.5 29 164 -15 35 43 16 36 31 23 35 11 0 37 5 2 -1.75 - 88 0 0 36 10 28 10 22 50.6 29 165 -14 35 46 31 36 34 42 35 14 13 37 8 23 -1.76 - 87 0 0 36 14 30 10 22 58.7 29 167 -13 35 50 32 36 38 46 35 18 11 37 12 30 -1.76 - 86 0 0 36 19 19 10 23 6.8 29 168 -12 35 55 19 36 43 37 35 22 55 37 17 24 -1.76 - 85 0 0 36 24 54 10 23 14.9 30 169 -12 36 0 51 36 49 14 35 28 24 37 23 5 -1.76 - 84 0 0 36 31 14 10 23 23.1 30 170 -11 36 7 8 36 55 38 35 34 38 37 29 33 -1.76 - 83 0 0 36 38 20 10 23 31.3 30 171 -10 36 14 11 37 2 47 35 41 37 37 36 47 -1.76 - 82 0 0 36 46 12 10 23 39.5 30 172 -9 36 22 0 37 10 42 35 49 20 37 44 47 -1.76 - 81 0 0 36 54 49 10 23 47.7 30 173 -8 36 30 34 37 19 24 35 57 49 37 53 34 -1.76 - 80 0 0 37 4 12 10 23 55.9 30 174 -7 36 39 52 37 28 51 36 7 3 38 3 7 -1.76 - 79 0 0 37 14 21 10 24 4.1 29 175 -7 36 49 56 37 39 4 36 17 1 38 13 27 -1.76 - 78 0 0 37 25 15 10 24 12.2 29 176 -6 37 0 46 37 50 3 36 27 44 38 24 33 -1.76 - 77 0 0 37 36 54 10 24 20.4 29 177 -5 37 12 20 38 1 47 36 39 11 38 36 25 -1.76 - 76 0 0 37 49 18 10 24 28.5 29 179 -4 37 24 38 38 14 17 36 51 23 38 49 3 -1.76 - 75 0 0 38 2 27 10 24 36.5 29 180 -3 37 37 42 38 27 32 37 4 19 39 2 26 -1.76 - 74 0 0 38 16 21 10 24 44.5 29 181 -2 37 51 29 38 41 32 37 17 59 39 16 35 -1.76 - 73 0 0 38 30 59 10 24 52.5 28 182 -1 38 6 1 38 56 17 37 32 22 39 31 30 -1.76 - 72 0 0 38 46 22 10 25 0.3 28 183 -1 38 21 17 39 11 47 37 47 29 39 47 10 -1.76 - 71 0 0 39 2 28 10 25 8.2 28 184 0 38 37 16 39 28 1 38 3 19 40 3 35 -1.76 - 70 0 0 39 19 18 10 25 15.9 27 185 1 38 53 59 39 44 59 38 19 52 40 20 44 -1.76 - 69 0 0 39 36 52 10 25 23.5 27 186 2 39 11 25 40 2 41 38 37 7 40 38 38 -1.76 - 68 0 0 39 55 9 10 25 31.1 27 187 3 39 29 34 40 21 6 38 55 6 40 57 16 -1.76 - 67 0 0 40 14 9 10 25 38.5 26 188 3 39 48 25 40 40 15 39 13 46 41 16 38 -1.76 - 66 0 0 40 33 52 10 25 45.9 26 189 4 40 7 59 41 0 7 39 33 7 41 36 43 -1.76 - 65 0 0 40 54 16 10 25 53.1 25 190 5 40 28 14 41 20 42 39 53 10 41 57 32 -1.76 - 64 0 0 41 15 23 10 26 0.2 25 191 6 40 49 11 41 41 58 40 13 54 42 19 3 -1.76 - 63 0 0 41 37 10 10 26 7.2 24 192 7 41 10 48 42 3 57 40 35 19 42 41 17 -1.76 - 62 0 0 41 59 39 10 26 14.0 24 193 8 41 33 6 42 26 36 40 57 23 43 4 13 -1.76 - 61 0 0 42 22 48 10 26 20.7 23 194 8 41 56 4 42 49 57 41 20 7 43 27 50 -1.76 - 60 0 0 42 46 37 10 26 27.3 23 195 9 42 19 42 43 13 58 41 43 30 43 52 8 -1.76 - 59 0 0 43 11 5 10 26 33.7 22 196 10 42 43 58 43 38 38 42 7 31 44 17 6 -1.76 - 58 0 0 43 36 12 10 26 39.9 21 197 11 43 8 53 44 3 58 42 32 10 44 42 44 -1.76 - 57 0 0 44 1 57 10 26 46.0 21 198 11 43 34 25 44 29 56 42 57 26 45 9 2 -1.76 - 56 0 0 44 28 19 10 26 51.9 20 199 12 44 0 35 44 56 32 43 23 19 45 35 58 -1.76 - 55 0 0 44 55 19 10 26 57.6 19 200 13 44 27 21 45 23 45 43 49 47 46 3 32 -1.76 - 54 0 0 45 22 54 10 27 3.1 19 201 13 44 54 42 45 51 35 44 16 51 46 31 43 -1.76 - 53 0 0 45 51 5 10 27 8.4 18 202 14 45 22 38 46 20 1 44 44 29 47 0 31 -1.76 - 52 0 0 46 19 50 10 27 13.5 17 202 15 45 51 9 46 49 2 45 12 40 47 29 55 -1.76 - 51 0 0 46 49 9 10 27 18.4 17 203 15 46 20 13 47 18 37 45 41 24 47 59 53 -1.76 - 50 0 0 47 19 0 10 27 23.2 16 204 16 46 49 49 47 48 45 46 10 40 48 30 25 -1.76 - 49 0 0 47 49 24 10 27 27.7 15 205 17 47 19 56 48 19 25 46 40 27 49 1 31 -1.76 - 48 0 0 48 20 18 10 27 31.9 14 206 17 47 50 34 48 50 37 47 10 44 49 33 9 -1.76 - 47 0 0 48 51 43 10 27 36.0 14 207 18 48 21 41 49 22 20 47 41 29 50 5 17 -1.76 - 46 0 0 49 23 36 10 27 39.8 13 208 18 48 53 17 49 54 31 48 12 43 50 37 56 -1.76 - 45 0 0 49 55 57 10 27 43.4 12 208 19 49 25 20 50 27 11 48 44 23 51 11 4 -1.76 - 44 0 0 50 28 44 10 27 46.8 11 209 19 49 57 49 51 0 18 49 16 29 51 44 40 -1.77 - 43 0 0 51 1 57 10 27 49.9 10 210 20 50 30 43 51 33 51 49 48 59 52 18 42 -1.77 - 42 0 0 51 35 33 10 27 52.8 10 211 20 51 4 1 52 7 48 50 21 53 52 53 10 -1.77 - 41 0 0 52 9 33 10 27 55.4 9 212 21 51 37 41 52 42 8 50 55 8 53 28 1 -1.78 - 40 0 0 52 43 54 10 27 57.9 8 213 21 52 11 42 53 16 51 51 28 44 54 3 16 -1.78 - 39 0 0 53 18 35 10 28 0.0 7 213 22 52 46 3 53 51 54 52 2 39 54 38 52 -1.78 - 38 0 0 53 53 35 10 28 2.0 6 214 22 53 20 42 54 27 16 52 36 52 55 14 47 -1.79 - 37 0 0 54 28 52 10 28 3.6 6 215 22 53 55 37 55 2 55 53 11 21 55 51 1 -1.80 - 36 0 0 55 4 24 10 28 5.1 5 216 23 54 30 48 55 38 51 53 46 5 56 27 32 -1.81 - 35 0 0 55 40 10 10 28 6.3 4 217 23 55 6 13 56 15 1 54 21 2 57 4 17 -1.83 - 34 0 0 56 16 9 10 28 7.3 3 218 23 55 41 49 56 51 24 54 56 11 57 41 16 -1.85 - 33 0 0 56 52 19 10 28 8.0 2 218 24 56 17 36 57 27 57 55 31 29 58 18 27 -1.89 - 32 0 0 57 28 37 10 28 8.5 1 219 24 56 53 32 58 4 40 56 6 57 58 55 47 -1.98 - 31 0 0 58 5 2 10 28 8.8 1 220 24 57 29 34 58 41 30 56 42 30 .. .. .. -2.26 - 30 0 0 .. .. .... .. .. .. .. .. .. 58 5 41 .. .. .. 57 18 9 .. .. .. .... - 29 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 57 53 51 .. .. .. .... Uncertainty in time = +/- 5 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 334-163431 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 26 15.8383 DE: -23 21 00.874 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 26 15.8383 DE: -23 21 00.874 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1057) Wanda asteroid class: approx. diameter [km]: 44 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.68570 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2023 Feb 09 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): 0.031", 0.015", 84.1° remarks: * orbital elements for (1057)Wanda : Mean anomaly = 272.0159693923 deg Arg. of pericenter = 114.8728641989 deg Long. of node = 257.8410500736 deg Inclination = 3.5416995170 deg Eccentricity = 0.2475329481 Semimajor axis = 2.8925792969 AU Perihelion dist = 2.1765706160 AU Mag: H = 11.05, G = 0.15 Epoch of elements : MJD 60041.43298611 TDT (2023 Apr 07.4330) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Feb09,3.83,2023,4,7,10.392798,-0.115213,0.860256,6.383743,0.856795,-0.005657,-0.000270,0.000000,0.000000 -74.4120,-23.3373,24.66,6.81,False UCAC4 334-163431,18.43773285,-23.3502429,0.00,12.13,0.00,0.0,4,,18.46117005,-23.3373363,4.48,0.00,0,0,0 1057,Wanda,16.59,43.7,2.6857,0,0,1.518,2.81,,2.2,0 0,271.9292,2023,4,7,114.8729,257.8411,3.5417,0.24753,2.89258,2.17657,11.07,5.0,0.15 1.685,0.0313,0.0153,84,0.0154,Known errors,-1.00,-1,-1,-1 20230407_163431,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org