IOTA/IOTA-ES occultation update for (519) Sylvania / UCAC4 351-077192 event on 2023 Mar 13, 04:21 UT Visible from Africa, Europe Summary ------- On 2023 Mar 13 UT, the 45 km diameter asteroid (519) Sylvania will occult a 12.0 mag star in the constellation Libra for observers along a path across Africa, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.45 mag to 14.34 mag (the magnitude of the asteroid) for at most 7.040 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 Mar 13, 04:08 - 2023 Mar 13, 04:34 * geocentric midpoint of event [JD]: 2460016.68142508 * magnitude of target star: 12.01 * magnitude drop [mag]: 2.45 * estimated maximum duration [s]: 7.040 * Moon: 70 % sunlit, 4° distance * Sun: 111° distance * rough path description: Africa, Europe The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 111°) * approx speed of asteroid's shadow [km/s]: 6.3875 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 351-077192 by 519 Sylvania on 2023 Mar 13 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 - 20 0 0 .. .. .... .. .. .. .. .. .. 67 44 47 .. .. .. 67 29 22 .. .. .. .... - 19 0 0 67 32 52 4 8 48.0 1 156 -20 66 54 36 .. .. .. 66 39 5 .. .. .. .... - 18 0 0 66 40 43 4 8 48.3 2 157 -20 66 2 17 67 20 5 65 46 43 67 36 35 -0.46 - 17 0 0 65 46 24 4 8 49.1 3 158 -20 65 7 52 66 25 52 64 52 15 66 42 25 -0.60 - 16 0 0 64 49 55 4 8 50.3 4 159 -21 64 11 20 65 29 27 63 55 42 65 46 1 -0.67 - 15 0 0 63 51 19 4 8 52.0 5 160 -21 63 12 44 64 30 50 62 57 6 64 47 24 -0.71 - 14 0 0 62 50 37 4 8 54.3 6 161 -21 62 12 5 63 30 5 61 56 28 63 46 37 -0.73 - 13 0 0 61 47 52 4 8 57.1 7 162 -22 61 9 26 62 27 13 60 53 52 62 43 43 -0.74 - 12 0 0 60 43 8 4 9 0.6 8 163 -22 60 4 52 61 22 19 59 49 21 61 38 44 -0.75 - 11 0 0 59 36 30 4 9 4.8 9 163 -22 58 58 26 60 15 28 58 42 59 60 31 47 -0.76 - 10 0 0 58 28 3 4 9 9.8 10 164 -22 57 50 13 59 6 45 57 34 52 59 22 58 -0.77 - 9 0 0 57 17 53 4 9 15.5 12 165 -23 56 40 21 57 56 17 56 25 6 58 12 21 -0.77 - 8 0 0 56 6 8 4 9 22.0 13 166 -23 55 28 54 56 44 10 55 13 48 57 0 5 -0.78 - 7 0 0 54 52 53 4 9 29.4 14 167 -23 54 16 2 55 30 32 54 1 4 55 46 17 -0.78 - 6 0 0 53 38 18 4 9 37.6 16 168 -23 53 1 50 54 15 32 52 47 1 54 31 6 -0.79 - 5 0 0 52 22 31 4 9 46.8 17 169 -23 51 46 28 52 59 17 51 31 49 53 14 40 -0.79 - 4 0 0 51 5 39 4 9 56.9 18 170 -23 50 30 3 51 41 57 50 15 34 51 57 7 -0.79 - 3 0 0 49 47 53 4 10 7.9 20 171 -23 49 12 44 50 23 41 48 58 27 50 38 38 -0.79 - 2 0 0 48 29 20 4 10 19.9 21 172 -23 47 54 41 49 4 37 47 40 35 49 19 22 -0.80 - 1 0 0 47 10 10 4 10 32.8 23 173 -23 46 36 1 47 44 56 46 22 7 47 59 27 -0.80 0 0 0 45 50 33 4 10 46.6 24 174 -23 45 16 54 46 24 46 45 3 12 46 39 3 -0.80 1 0 0 44 30 36 4 11 1.4 25 175 -22 43 57 28 45 4 17 43 43 58 45 18 20 -0.80 2 0 0 43 10 30 4 11 17.1 27 176 -22 42 37 53 43 43 38 42 24 36 43 57 27 -0.80 3 0 0 41 50 23 4 11 33.6 28 177 -22 41 18 18 42 22 58 41 5 13 42 36 32 -0.81 4 0 0 40 30 23 4 11 51.0 30 178 -21 39 58 50 41 2 25 39 45 58 41 15 46 -0.81 5 0 0 39 10 40 4 12 9.2 31 179 -21 38 39 38 39 42 8 38 26 58 39 55 15 -0.81 6 0 0 37 51 20 4 12 28.2 32 181 -20 37 20 49 38 22 15 37 8 22 38 35 8 -0.81 7 0 0 36 32 30 4 12 47.9 34 182 -20 36 2 31 37 2 54 35 50 17 37 15 32 -0.81 8 0 0 35 14 20 4 13 8.3 35 183 -19 34 44 52 35 44 11 34 32 50 35 56 36 -0.82 9 0 0 33 56 55 4 13 29.3 36 184 -18 33 27 57 34 26 15 33 16 7 34 38 26 -0.82 10 0 0 32 40 21 4 13 50.9 37 186 -18 32 11 53 33 9 9 32 0 15 33 21 8 -0.82 11 0 0 31 24 44 4 14 13.0 38 187 -17 30 56 46 31 53 2 30 45 20 32 4 47 -0.82 12 0 0 30 10 10 4 14 35.6 39 189 -16 29 42 40 30 37 58 29 31 26 30 49 31 -0.83 13 0 0 28 56 43 4 14 58.7 41 190 -15 28 29 42 29 24 2 28 18 39 29 35 23 -0.83 14 0 0 27 44 29 4 15 22.1 42 192 -14 27 17 55 28 11 19 27 7 3 28 22 27 -0.83 15 0 0 26 33 30 4 15 45.8 42 193 -13 26 7 24 26 59 52 25 56 43 27 10 49 -0.84 16 0 0 25 23 51 4 16 9.8 43 195 -12 24 58 11 25 49 46 24 47 41 26 0 32 -0.84 17 0 0 24 15 34 4 16 34.0 44 196 -12 23 50 20 24 41 3 23 40 0 24 51 38 -0.84 18 0 0 23 8 43 4 16 58.3 45 198 -11 22 43 54 23 33 47 22 33 44 23 44 10 -0.84 19 0 0 22 3 20 4 17 22.8 46 200 -10 21 38 55 22 27 58 21 28 55 22 38 12 -0.85 20 0 0 20 59 27 4 17 47.4 46 202 -9 20 35 25 21 23 41 20 25 34 21 33 44 -0.85 21 0 0 19 57 4 4 18 11.9 47 204 -7 19 33 25 20 20 55 19 23 44 20 30 49 -0.85 22 0 0 18 56 14 4 18 36.5 47 205 -6 18 32 57 19 19 43 18 23 25 19 29 27 -0.86 23 0 0 17 56 58 4 19 1.0 48 207 -5 17 34 2 18 20 5 17 24 38 18 29 39 -0.86 24 0 0 16 59 15 4 19 25.4 48 209 -4 16 36 40 17 22 1 16 27 25 17 31 27 -0.86 25 0 0 16 3 8 4 19 49.8 48 211 -3 15 40 53 16 25 33 15 31 45 16 34 50 -0.86 26 0 0 15 8 35 4 20 13.9 49 213 -2 14 46 39 15 30 41 14 37 40 15 39 50 -0.87 27 0 0 14 15 37 4 20 37.9 49 215 -1 13 54 0 14 37 24 13 45 8 14 46 25 -0.87 28 0 0 13 24 14 4 21 1.7 49 216 0 13 2 54 13 45 43 12 54 10 13 54 36 -0.87 29 0 0 12 34 25 4 21 25.2 49 218 1 12 13 22 12 55 36 12 4 45 13 4 22 -0.87 30 0 0 11 46 10 4 21 48.5 49 220 2 11 25 24 12 7 4 11 16 53 12 15 43 -0.88 31 0 0 10 59 28 4 22 11.6 49 222 3 10 38 58 11 20 6 10 30 33 11 28 38 -0.88 32 0 0 10 14 18 4 22 34.3 48 223 5 9 54 3 10 34 41 9 45 45 10 43 7 -0.88 33 0 0 9 30 40 4 22 56.8 48 225 6 9 10 40 9 50 48 9 2 28 9 59 8 -0.88 34 0 0 8 48 33 4 23 18.9 48 227 7 8 28 47 9 8 27 8 20 40 9 16 40 -0.89 35 0 0 8 7 56 4 23 40.7 48 228 8 7 48 23 8 27 36 7 40 22 8 35 44 -0.89 36 0 0 7 28 47 4 24 2.2 47 230 9 7 9 27 7 48 14 7 1 32 7 56 16 -0.89 37 0 0 6 51 6 4 24 23.3 47 231 10 6 31 59 7 10 21 6 24 8 7 18 18 -0.89 38 0 0 6 14 52 4 24 44.1 46 232 11 5 55 57 6 33 54 5 48 11 6 41 47 -0.89 39 0 0 5 40 4 4 25 4.5 46 234 12 5 21 19 5 58 54 5 13 38 6 6 42 -0.89 40 0 0 5 6 40 4 25 24.5 45 235 14 4 48 6 5 25 19 4 40 29 5 33 2 -0.90 41 0 0 4 34 39 4 25 44.2 45 236 15 4 16 16 4 53 8 4 8 43 5 0 46 -0.90 42 0 0 4 4 0 4 26 3.5 44 237 16 3 45 47 4 22 19 3 38 18 4 29 54 -0.90 43 0 0 3 34 42 4 26 22.4 43 238 17 3 16 38 3 52 52 3 9 13 4 0 22 -0.90 44 0 0 3 6 44 4 26 40.9 43 239 18 2 48 49 3 24 45 2 41 28 3 32 12 -0.90 45 0 0 2 40 5 4 26 59.1 42 240 19 2 22 19 2 57 57 2 15 1 3 5 21 -0.90 46 0 0 2 14 44 4 27 16.8 41 241 20 1 57 6 2 32 28 1 49 51 2 39 48 -0.90 47 0 0 1 50 40 4 27 34.2 41 241 21 1 33 9 2 8 16 1 25 58 2 15 32 -0.90 48 0 0 1 27 51 4 27 51.1 40 242 22 1 10 27 1 45 20 1 3 19 1 52 33 -0.90 49 0 0 1 6 17 4 28 7.7 39 243 24 0 49 0 1 23 38 0 41 54 1 30 49 -0.90 50 0 0 0 45 56 4 28 23.9 38 244 25 0 28 46 1 3 11 0 21 42 1 10 19 -0.90 51 0 0 0 26 48 4 28 39.7 37 244 26 0 9 44 0 43 57 0 2 43 0 51 2 -0.90 52 0 0 0 8 52 4 28 55.0 37 245 27 - 0 8 7 0 25 55 - 0 15 5 0 32 58 -0.90 53 0 0 - 0 7 53 4 29 10.0 36 245 28 - 0 24 46 0 9 5 - 0 31 42 0 16 5 -0.90 54 0 0 - 0 23 28 4 29 24.7 35 246 29 - 0 40 16 - 0 6 35 - 0 47 10 0 0 23 -0.90 55 0 0 - 0 37 54 4 29 38.9 34 246 30 - 0 54 37 - 0 21 6 - 1 1 29 - 0 14 9 -0.90 56 0 0 - 0 51 11 4 29 52.7 33 246 31 - 1 7 50 - 0 34 27 - 1 14 40 - 0 27 32 -0.90 57 0 0 - 1 3 20 4 30 6.1 32 247 32 - 1 19 55 - 0 46 40 - 1 26 44 - 0 39 47 -0.90 58 0 0 - 1 14 22 4 30 19.2 31 247 33 - 1 30 54 - 0 57 46 - 1 37 41 - 0 50 55 -0.90 59 0 0 - 1 24 17 4 30 31.9 30 247 34 - 1 40 46 - 1 7 45 - 1 47 32 - 1 0 55 -0.90 60 0 0 - 1 33 7 4 30 44.1 29 248 35 - 1 49 32 - 1 16 38 - 1 56 17 - 1 9 49 -0.90 61 0 0 - 1 40 51 4 30 56.0 29 248 36 - 1 57 14 - 1 24 25 - 2 3 57 - 1 17 37 -0.90 62 0 0 - 1 47 31 4 31 7.5 28 248 37 - 2 3 51 - 1 31 7 - 2 10 33 - 1 24 20 -0.90 63 0 0 - 1 53 6 4 31 18.6 27 248 38 - 2 9 24 - 1 36 44 - 2 16 6 - 1 29 59 -0.90 64 0 0 - 1 57 38 4 31 29.3 26 249 40 - 2 13 54 - 1 41 18 - 2 20 35 - 1 34 33 -0.90 65 0 0 - 2 1 6 4 31 39.7 25 249 41 - 2 17 20 - 1 44 48 - 2 24 1 - 1 38 4 -0.90 66 0 0 - 2 3 31 4 31 49.6 24 249 42 - 2 19 44 - 1 47 14 - 2 26 24 - 1 40 31 -0.90 67 0 0 - 2 4 54 4 31 59.2 23 249 43 - 2 21 6 - 1 48 38 - 2 27 45 - 1 41 55 -0.89 68 0 0 - 2 5 15 4 32 8.3 22 249 44 - 2 21 26 - 1 49 0 - 2 28 5 - 1 42 17 -0.89 69 0 0 - 2 4 33 4 32 17.1 21 249 45 - 2 20 44 - 1 48 19 - 2 27 23 - 1 41 36 -0.89 70 0 0 - 2 2 50 4 32 25.5 20 249 46 - 2 19 0 - 1 46 36 - 2 25 39 - 1 39 53 -0.89 71 0 0 - 2 0 6 4 32 33.4 19 249 47 - 2 16 16 - 1 43 51 - 2 22 55 - 1 37 9 -0.89 72 0 0 - 1 56 20 4 32 41.0 18 250 48 - 2 12 31 - 1 40 5 - 2 19 9 - 1 33 22 -0.89 73 0 0 - 1 51 33 4 32 48.2 17 250 49 - 2 7 44 - 1 35 18 - 2 14 23 - 1 28 35 -0.89 74 0 0 - 1 45 45 4 32 55.0 16 250 50 - 2 1 58 - 1 29 29 - 2 8 37 - 1 22 46 -0.89 75 0 0 - 1 38 57 4 33 1.4 15 250 51 - 1 55 10 - 1 22 40 - 2 1 50 - 1 15 56 -0.89 76 0 0 - 1 31 8 4 33 7.4 14 250 52 - 1 47 22 - 1 14 49 - 1 54 3 - 1 8 5 -0.89 77 0 0 - 1 22 18 4 33 13.0 13 250 53 - 1 38 34 - 1 5 58 - 1 45 15 - 0 59 13 -0.89 78 0 0 - 1 12 28 4 33 18.2 12 250 54 - 1 28 46 - 0 56 6 - 1 35 28 - 0 49 21 -0.89 79 0 0 - 1 1 37 4 33 22.9 11 250 55 - 1 17 57 - 0 45 13 - 1 24 40 - 0 38 27 -0.89 80 0 0 - 0 49 46 4 33 27.3 10 250 56 - 1 6 9 - 0 33 20 - 1 12 52 - 0 26 32 -0.89 81 0 0 - 0 36 55 4 33 31.2 9 250 57 - 0 53 19 - 0 20 25 - 1 0 4 - 0 13 37 -0.90 82 0 0 - 0 23 2 4 33 34.8 8 250 58 - 0 39 30 - 0 6 30 - 0 46 16 0 0 19 -0.90 83 0 0 - 0 8 9 4 33 37.8 7 250 59 - 0 24 40 0 8 26 - 0 31 27 0 15 17 -0.90 84 0 0 0 7 44 4 33 40.5 6 250 60 - 0 8 50 0 24 23 - 0 15 38 0 31 15 -0.91 85 0 0 0 24 39 4 33 42.7 5 250 61 0 8 1 0 41 21 0 1 11 0 48 15 -0.92 86 0 0 0 42 34 4 33 44.5 4 250 62 0 25 53 0 59 20 0 19 1 1 6 16 -0.94 87 0 0 1 1 31 4 33 45.9 3 250 63 0 44 45 1 18 21 0 37 52 1 25 18 -0.97 88 0 0 1 21 28 4 33 46.8 2 250 64 1 4 38 1 38 23 0 57 43 1 45 22 -1.05 89 0 0 1 42 27 4 33 47.3 1 250 65 1 25 32 1 59 27 1 18 36 2 6 28 -1.45 Uncertainty in time = +/- 4 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 351-077192 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 55 25.3703 DE: -19 57 05.426 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 55 25.3705 DE: -19 57 05.427 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (519) Sylvania asteroid class: approx. diameter [km]: 45 approx. diameter ["]: 0.025 distance from Earth [AU]: 2.50720 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Feb 07 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): 0.015", 0.002", 111.324° remarks: * orbital elements for (519)Sylvania : Mean anomaly = 254.0414820991 deg Arg. of pericenter = 302.8670852761 deg Long. of node = 44.6827044977 deg Inclination = 11.0122089809 deg Eccentricity = 0.1830788903 Semimajor axis = 2.7915673313 AU Perihelion dist = 2.2804902820 AU Mag: H = 9.00, G = 0.15 Epoch of elements : MJD 60016.18125000 TDT (2023 Mar 13.1812) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Feb07,7.04,2023,3,13,4.354202,0.415664,0.510692,2.794812,-2.277553,-0.005374,0.001105,0.000000,0.000000 3.3303,-20.0197,117.09,-3.05,False UCAC4 351-077192,15.92371396,-19.9515072,0.00,12.01,0.00,0.0,0,,15.94612931,-20.0197236,2.45,0.00,0,0,0 519,Sylvania,14.34,45.0,2.5072,0,0,0.696,-7.99,,2.6,0 0,254.0032,2023,3,13,302.8671,44.6827,11.0122,0.18308,2.79157,2.28049,9.02,5.0,0.15 1.206,0.0153,0.0021,111,0.0051,Known errors,-1.00,-1,-1,-1 20230313_077192,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org