IOTA/IOTA-ES occultation update for (52) Europa / UCAC4 350-112253 event on 2023 Sep 23, 20:07 UT Visible from N Africa, Europe Summary ------- On 2023 Sep 23 UT, the 325.6 km diameter asteroid (52) Europa will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across N Africa, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.41 mag to 12.77 mag (the magnitude of the asteroid) for at most 18.740 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: 100 * date and approx. time of event: 2023 Sep 23, 20:03 - 2023 Sep 23, 20:10 * geocentric midpoint of event [JD]: 2460211.33837409 * magnitude of target star: 11.71 * magnitude drop [mag]: 1.41 * estimated maximum duration [s]: 18.740 * Moon: 61 % sunlit, 19° distance * Sun: 86° distance * rough path description: N Africa, Europe The occultation path -------------------- * approximate projected width [km]: 681 * 1 sigma uncertainty interval [path widths]: +/- 0.01 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.004, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.004", 0.001", 98°) * approx speed of asteroid's shadow [km/s]: 17.3711 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 350-112253 by 52 Europa on 2023 Sep 23 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 - 82 0 0 .. .. .... .. .. .. .. .. .. 62 34 25 .. .. .. 62 30 42 .. .. .. .... - 81 0 0 .. .. .... .. .. .. .. .. .. 62 3 10 .. .. .. 61 59 28 .. .. .. .... - 80 0 0 .. .. .... .. .. .. .. .. .. 61 31 40 .. .. .. 61 27 58 .. .. .. .... - 79 0 0 .. .. .... .. .. .. .. .. .. 60 59 56 .. .. .. 60 56 16 .. .. .. .... - 78 0 0 .. .. .... .. .. .. .. .. .. 60 28 1 .. .. .. 60 24 22 .. .. .. .... - 77 0 1 64 28 12 20 4 22.1 0 143 17 59 55 55 .. .. .. 59 52 17 .. .. .. .... - 76 0 1 63 53 49 20 4 22.2 1 144 17 59 23 40 .. .. .. 59 20 4 .. .. .. -0.70 - 75 0 1 63 19 16 20 4 22.4 2 145 17 58 51 19 .. .. .. 58 47 44 .. .. .. -1.22 - 74 0 1 62 44 35 20 4 22.7 2 146 17 58 18 51 .. .. .. 58 15 18 .. .. .. -1.41 - 73 0 1 62 9 49 20 4 23.1 3 147 17 57 46 20 .. .. .. 57 42 48 .. .. .. -1.51 - 72 0 1 61 34 59 20 4 23.7 4 147 17 57 13 46 .. .. .. 57 10 15 .. .. .. -1.57 - 71 0 1 61 0 6 20 4 24.5 5 148 17 56 41 11 .. .. .. 56 37 42 .. .. .. -1.62 - 70 0 1 60 25 15 20 4 25.3 5 149 17 56 8 37 65 54 37 56 5 10 66 0 27 -1.65 - 69 0 1 59 50 25 20 4 26.3 6 150 17 55 36 5 65 14 49 55 32 39 65 20 31 -1.67 - 68 0 1 59 15 39 20 4 27.5 7 151 17 55 3 37 64 35 11 55 0 13 64 40 46 -1.69 - 67 0 1 58 40 58 20 4 28.8 8 152 17 54 31 14 63 55 44 54 27 51 64 1 13 -1.71 - 66 0 1 58 6 25 20 4 30.2 8 153 17 53 58 58 63 16 33 53 55 37 63 21 54 -1.72 - 65 0 0 57 32 1 20 4 31.8 9 154 16 53 26 51 62 37 36 53 23 31 62 42 52 -1.73 - 64 0 0 56 57 48 20 4 33.6 10 154 16 52 54 53 61 58 58 52 51 34 62 4 7 -1.74 - 63 0 0 56 23 47 20 4 35.5 11 155 16 52 23 6 61 20 38 52 19 49 61 25 42 -1.75 - 62 0 0 55 50 1 20 4 37.5 11 156 16 51 51 32 60 42 40 51 48 16 60 47 38 -1.75 - 61 0 0 55 16 30 20 4 39.7 12 157 15 51 20 11 60 5 5 51 16 58 60 9 57 -1.76 - 60 0 0 54 43 15 20 4 42.0 13 158 15 50 49 6 59 27 53 50 45 54 59 32 40 -1.76 - 59 0 0 54 10 19 20 4 44.5 14 159 15 50 18 17 58 51 6 50 15 6 58 55 49 -1.77 - 58 0 0 53 37 43 20 4 47.1 14 160 14 49 47 46 58 14 47 49 44 37 58 19 24 -1.77 - 57 0 0 53 5 28 20 4 49.8 15 161 14 49 17 33 57 38 54 49 14 26 57 43 27 -1.78 - 56 0 0 52 33 35 20 4 52.7 16 162 14 48 47 41 57 3 31 48 44 35 57 8 0 -1.78 - 55 0 0 52 2 5 20 4 55.7 16 163 13 48 18 10 56 28 38 48 15 5 56 33 3 -1.79 - 54 0 0 51 31 0 20 4 58.8 17 164 13 47 49 2 55 54 16 47 45 58 55 58 37 -1.79 - 53 0 0 51 0 21 20 5 2.1 18 165 12 47 20 17 55 20 26 47 17 14 55 24 43 -1.79 - 52 0 0 50 30 9 20 5 5.5 18 165 12 46 51 56 54 47 9 46 48 55 54 51 22 -1.79 - 51 0 0 50 0 25 20 5 9.0 19 166 11 46 24 0 54 14 27 46 21 1 54 18 36 -1.80 - 50 0 0 49 31 9 20 5 12.7 20 167 11 45 56 31 53 42 19 45 53 33 53 46 24 -1.80 - 49 0 0 49 2 24 20 5 16.4 20 168 10 45 29 29 53 10 46 45 26 32 53 14 49 -1.80 - 48 0 0 48 34 9 20 5 20.3 21 169 10 45 2 55 52 39 50 44 59 59 52 43 49 -1.81 - 47 0 0 48 6 25 20 5 24.3 21 170 9 44 36 50 52 9 31 44 33 55 52 13 27 -1.81 - 46 0 0 47 39 14 20 5 28.3 22 171 8 44 11 15 51 39 50 44 8 21 51 43 43 -1.81 - 45 0 0 47 12 36 20 5 32.5 22 172 8 43 46 10 51 10 47 43 43 17 51 14 37 -1.81 - 44 0 0 46 46 32 20 5 36.8 23 173 7 43 21 36 50 42 23 43 18 45 50 46 11 -1.82 - 43 0 0 46 21 2 20 5 41.1 24 174 7 42 57 34 50 14 38 42 54 44 50 18 24 -1.82 - 42 0 0 45 56 7 20 5 45.6 24 175 6 42 34 5 49 47 34 42 31 16 49 51 17 -1.82 - 41 0 0 45 31 48 20 5 50.1 24 176 5 42 11 9 49 21 10 42 8 21 49 24 51 -1.82 - 40 0 0 45 8 6 20 5 54.7 25 177 5 41 48 46 48 55 28 41 45 59 48 59 6 -1.82 - 39 0 0 44 45 0 20 5 59.4 25 179 4 41 26 58 48 30 26 41 24 12 48 34 3 -1.83 - 38 0 0 44 22 31 20 6 4.1 26 180 3 41 5 45 48 6 7 41 2 59 48 9 41 -1.83 - 37 0 0 44 0 41 20 6 8.9 26 181 2 40 45 7 47 42 30 40 42 22 47 46 2 -1.83 - 36 0 0 43 39 29 20 6 13.8 26 182 2 40 25 4 47 19 35 40 22 21 47 23 6 -1.83 - 35 0 0 43 18 55 20 6 18.7 27 183 1 40 5 38 46 57 24 40 2 56 47 0 52 -1.83 - 34 0 0 42 59 1 20 6 23.7 27 184 0 39 46 49 46 35 56 39 44 7 46 39 22 -1.84 - 33 0 0 42 39 46 20 6 28.7 27 185 -1 39 28 37 46 15 11 39 25 56 46 18 36 -1.84 - 32 0 0 42 21 11 20 6 33.7 27 186 -1 39 11 2 45 55 10 39 8 22 45 58 33 -1.84 - 31 0 0 42 3 17 20 6 38.8 28 187 -2 38 54 5 45 35 53 38 51 26 45 39 15 -1.84 - 30 0 0 41 46 2 20 6 43.9 28 188 -3 38 37 46 45 17 21 38 35 8 45 20 41 -1.84 - 29 0 0 41 29 29 20 6 49.1 28 189 -4 38 22 6 44 59 32 38 19 28 45 2 52 -1.84 - 28 0 0 41 13 37 20 6 54.2 28 190 -4 38 7 4 44 42 29 38 4 27 44 45 47 -1.84 - 27 0 0 40 58 26 20 6 59.4 28 192 -5 37 52 42 44 26 11 37 50 5 44 29 28 -1.85 - 26 0 0 40 43 57 20 7 4.6 28 193 -6 37 38 58 44 10 38 37 36 22 44 13 53 -1.85 - 25 0 0 40 30 10 20 7 9.7 28 194 -7 37 25 54 43 55 49 37 23 18 43 59 4 -1.85 - 24 0 0 40 17 4 20 7 14.9 28 195 -8 37 13 30 43 41 47 37 10 55 43 45 0 -1.85 - 23 0 0 40 4 41 20 7 20.1 28 196 -8 37 1 45 43 28 29 36 59 11 43 31 42 -1.85 - 22 0 0 39 53 0 20 7 25.3 28 197 -9 36 50 41 43 15 57 36 48 7 43 19 9 -1.85 - 21 0 0 39 42 1 20 7 30.4 28 198 -10 36 40 16 43 4 11 36 37 43 43 7 22 -1.85 - 20 0 0 39 31 44 20 7 35.6 28 199 -11 36 30 32 42 53 11 36 27 59 42 56 21 -1.85 - 19 0 0 39 22 11 20 7 40.7 28 200 -12 36 21 28 42 42 56 36 18 55 42 46 5 -1.86 - 18 0 0 39 13 20 20 7 45.8 28 201 -12 36 13 5 42 33 27 36 10 33 42 36 36 -1.86 - 17 0 0 39 5 12 20 7 50.9 28 202 -13 36 5 22 42 24 44 36 2 50 42 27 52 -1.86 - 16 0 0 38 57 46 20 7 55.9 28 203 -14 35 58 20 42 16 47 35 55 48 42 19 54 -1.86 - 15 0 0 38 51 4 20 8 0.9 27 205 -15 35 51 59 42 9 36 35 49 27 42 12 43 -1.86 - 14 0 0 38 45 4 20 8 5.8 27 206 -16 35 46 19 42 3 10 35 43 47 42 6 17 -1.86 - 13 0 0 38 39 48 20 8 10.7 27 207 -16 35 41 19 41 57 31 35 38 48 42 0 37 -1.86 - 12 0 0 38 35 15 20 8 15.6 27 208 -17 35 37 1 41 52 38 35 34 30 41 55 43 -1.86 - 11 0 0 38 31 25 20 8 20.4 26 209 -18 35 33 23 41 48 30 35 30 52 41 51 36 -1.86 - 10 0 0 38 28 17 20 8 25.1 26 210 -19 35 30 27 41 45 9 35 27 56 41 48 14 -1.86 - 9 0 0 38 25 53 20 8 29.8 26 211 -20 35 28 11 41 42 33 35 25 40 41 45 38 -1.86 - 8 0 0 38 24 12 20 8 34.4 25 211 -20 35 26 36 41 40 44 35 24 6 41 43 48 -1.86 - 7 0 0 38 23 14 20 8 38.9 25 212 -21 35 25 43 41 39 40 35 23 12 41 42 45 -1.86 - 6 0 0 38 22 59 20 8 43.4 24 213 -22 35 25 30 41 39 22 35 22 59 41 42 27 -1.86 - 5 0 0 38 23 27 20 8 47.8 24 214 -23 35 25 58 41 39 50 35 23 27 41 42 55 -1.86 - 4 0 0 38 24 38 20 8 52.1 23 215 -23 35 27 6 41 41 4 35 24 36 41 44 9 -1.87 - 3 0 0 38 26 32 20 8 56.3 23 216 -24 35 28 56 41 43 4 35 26 25 41 46 9 -1.87 - 2 0 0 38 29 9 20 9 0.5 22 217 -25 35 31 26 41 45 49 35 28 56 41 48 54 -1.87 - 1 0 0 38 32 28 20 9 4.5 22 218 -26 35 34 37 41 49 20 35 32 7 41 52 25 -1.87 - 0 0 0 38 36 30 20 9 8.5 21 219 -26 35 38 29 41 53 37 35 35 58 41 56 42 -1.87 1 0 0 38 41 15 20 9 12.3 21 220 -27 35 43 1 41 58 39 35 40 30 42 1 44 -1.87 2 0 0 38 46 42 20 9 16.1 20 220 -28 35 48 14 42 4 26 35 45 43 42 7 32 -1.87 3 0 0 38 52 52 20 9 19.7 20 221 -28 35 54 7 42 10 58 35 51 35 42 14 5 -1.87 4 0 0 38 59 43 20 9 23.3 19 222 -29 36 0 39 42 18 16 35 58 8 42 21 23 -1.87 5 0 0 39 7 17 20 9 26.7 18 223 -30 36 7 52 42 26 19 36 5 21 42 29 26 -1.87 6 0 0 39 15 33 20 9 30.0 18 224 -30 36 15 45 42 35 7 36 13 13 42 38 15 -1.87 7 0 0 39 24 31 20 9 33.2 17 224 -31 36 24 18 42 44 39 36 21 45 42 47 48 -1.87 8 0 0 39 34 10 20 9 36.3 16 225 -31 36 33 30 42 54 56 36 30 57 42 58 6 -1.87 9 0 0 39 44 31 20 9 39.3 16 226 -32 36 43 21 43 5 58 36 40 48 43 9 8 -1.87 10 0 0 39 55 33 20 9 42.1 15 227 -33 36 53 51 43 17 44 36 51 18 43 20 55 -1.87 11 0 0 40 7 17 20 9 44.8 14 228 -33 37 5 1 43 30 15 37 2 27 43 33 27 -1.87 12 0 0 40 19 41 20 9 47.4 14 228 -34 37 16 49 43 43 30 37 14 14 43 46 42 -1.88 13 0 0 40 32 46 20 9 49.9 13 229 -34 37 29 16 43 57 29 37 26 41 44 0 42 -1.88 14 0 0 40 46 31 20 9 52.2 12 230 -35 37 42 21 44 12 11 37 39 45 44 15 25 -1.88 15 0 0 41 0 57 20 9 54.4 11 230 -35 37 56 3 44 27 37 37 53 27 44 30 52 -1.88 16 0 0 41 16 3 20 9 56.4 11 231 -36 38 10 24 44 43 46 38 7 48 44 47 3 -1.88 17 0 0 41 31 49 20 9 58.3 10 232 -36 38 25 23 45 0 38 38 22 46 45 3 56 -1.89 18 0 0 41 48 14 20 10 0.1 9 233 -36 38 40 58 45 18 14 38 38 20 45 21 33 -1.89 19 0 0 42 5 18 20 10 1.7 8 233 -37 38 57 10 45 36 32 38 54 32 45 39 53 -1.89 20 0 0 42 23 1 20 10 3.2 8 234 -37 39 13 59 45 55 33 39 11 20 45 58 55 -1.90 21 0 0 42 41 22 20 10 4.6 7 235 -38 39 31 23 46 15 16 39 28 44 46 18 39 -1.91 22 0 0 43 0 22 20 10 5.8 6 235 -38 39 49 24 46 35 40 39 46 43 46 39 6 -1.91 23 0 0 43 19 59 20 10 6.8 5 236 -38 40 7 59 46 56 47 40 5 18 47 0 14 -1.92 24 0 0 43 40 14 20 10 7.7 4 237 -38 40 27 10 47 18 35 40 24 28 47 22 3 -1.94 25 0 0 44 1 6 20 10 8.4 4 237 -39 40 46 55 47 41 4 40 44 12 47 44 34 -1.96 26 0 0 44 22 34 20 10 9.0 3 238 -39 41 7 15 48 4 13 41 4 31 48 7 45 -2.00 27 0 0 44 44 38 20 10 9.5 2 239 -39 41 28 8 48 28 3 41 25 23 48 31 37 -2.06 28 0 0 45 7 18 20 10 9.8 1 240 -39 41 49 34 .. .. .. 41 46 48 .. .. .. -2.20 29 0 0 45 30 33 20 10 9.9 0 240 -39 42 11 33 .. .. .. 42 8 46 .. .. .. -2.91 30 0 0 .. .. .... .. .. .. .. .. .. 42 34 4 .. .. .. 42 31 16 .. .. .. .... 31 0 0 .. .. .... .. .. .. .. .. .. 42 57 6 .. .. .. 42 54 17 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: UCAC4 350-112253 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 44 00.0593 DE: -20 05 33.505 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 44 00.0593 DE: -20 05 33.505 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (52) Europa asteroid class: ShapeModel approx. diameter [km]: 326 approx. diameter ["]: 0.134 distance from Earth [AU]: 3.35310 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#123 date of fit: 2023 Aug 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): 0.004", 0.001", 97.903° remarks: * orbital elements for (52)Europa : Mean anomaly = 169.5007936936 deg Arg. of pericenter = 342.9084443591 deg Long. of node = 128.5809353463 deg Inclination = 7.4792360794 deg Eccentricity = 0.1112768439 Semimajor axis = 3.0932186076 AU Perihelion dist = 2.7490150034 AU Mag: H = 6.68, G = 0.18 Epoch of elements : MJD 60210.83847222 TDT (2023 Sep 23.8385) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1232023Aug24,18.74,2023,9,23,20.120978,0.184773,0.858544,9.584656,-2.065785,0.005808,-0.000119,0.000000,0.000000 -37.8773,-20.1035,-123.73,-0.22,False UCAC4 350-112253,17.73334984,-20.0926403,0.00,11.71,0.00,0.0,0,,17.75664526,-20.1034571,1.40,0.00,0,0,0 52,Europa,12.77,325.600,3.3531,0,0,1.785,-5.42,,16.4,0 0,169.3489,2023,9,23,342.9084,128.5809,7.4792,0.11128,3.09322,2.74902,6.56,5.0,0.15 1.007,0.0037,0.0010,98,0.0038,Known errors,-1.00,0,-1,-1 20230923_112253,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org