IOTA/IOTA-ES occultation update for (146) Lucina / UCAC4 339-113933 event on 2023 May 28, 11:57 UT Visible from Australia Summary ------- On 2023 May 28 UT, the 137.2 km diameter asteroid (146) Lucina will occult a 12.5 mag star in the constellation Sagittarius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.58 mag to 12.09 mag (the magnitude of the asteroid) for at most 14.440 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 May 28, 11:46 - 2023 May 28, 12:09 * geocentric midpoint of event [JD]: 2460092.99864183 * magnitude of target star: 12.47 * magnitude drop [mag]: 0.58 * estimated maximum duration [s]: 14.440 * Moon: 59 % sunlit, 103° distance * Sun: 156° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 139 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.006", 105°) * approx speed of asteroid's shadow [km/s]: 9.5006 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 339-113933 by 146 Lucina on 2023 May 28 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 106 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -15 33 15 .... 107 0 0 -15 3 42 12 9 2.9 1 113 -24 -14 22 29 -15 44 48 -14 9 18 -15 57 54 .... 108 0 0 -15 27 56 12 9 2.6 2 113 -25 -14 46 53 -16 8 53 -14 33 44 -16 21 58 -0.07 109 0 0 -15 51 34 12 9 2.1 3 112 -26 -15 10 39 -16 32 23 -14 57 33 -16 45 24 -0.12 110 0 0 -16 14 36 12 9 1.4 4 112 -27 -15 33 49 -16 55 16 -15 20 46 -17 8 15 -0.14 111 0 0 -16 37 1 12 9 0.5 5 112 -28 -15 56 23 -17 17 33 -15 43 22 -17 30 29 -0.15 112 0 0 -16 58 50 12 8 59.3 6 112 -29 -16 18 20 -17 39 14 -16 5 22 -17 52 8 -0.16 113 0 0 -17 20 3 12 8 57.9 7 111 -30 -16 39 41 -18 0 20 -16 26 46 -18 13 11 -0.17 114 0 0 -17 40 40 12 8 56.4 8 111 -31 -17 0 26 -18 20 49 -16 47 33 -18 33 37 -0.17 115 0 0 -18 0 42 12 8 54.6 9 111 -32 -17 20 35 -18 40 43 -17 7 44 -18 53 29 -0.17 116 0 0 -18 20 7 12 8 52.7 10 110 -33 -17 40 8 -19 0 1 -17 27 19 -19 12 45 -0.18 117 0 0 -18 38 57 12 8 50.5 11 110 -34 -17 59 5 -19 18 43 -17 46 19 -19 31 25 -0.18 118 0 0 -18 57 12 12 8 48.2 12 110 -35 -18 17 26 -19 36 51 -18 4 43 -19 49 30 -0.18 119 0 0 -19 14 51 12 8 45.7 13 110 -36 -18 35 13 -19 54 23 -18 22 31 -20 7 1 -0.18 120 0 0 -19 31 55 12 8 43.0 14 109 -37 -18 52 23 -20 11 21 -18 39 44 -20 23 56 -0.18 121 0 0 -19 48 24 12 8 40.1 15 109 -38 -19 8 59 -20 27 44 -18 56 22 -20 40 17 -0.18 122 0 0 -20 4 19 12 8 37.1 16 109 -39 -19 25 0 -20 43 32 -19 12 25 -20 56 3 -0.18 123 0 0 -20 19 39 12 8 33.9 17 108 -40 -19 40 26 -20 58 46 -19 27 53 -21 11 15 -0.18 124 0 0 -20 34 24 12 8 30.5 18 108 -41 -19 55 17 -21 13 26 -19 42 46 -21 25 53 -0.18 125 0 0 -20 48 36 12 8 27.0 19 108 -41 -20 9 34 -21 27 31 -19 57 5 -21 39 57 -0.18 126 0 0 -21 2 13 12 8 23.3 20 107 -42 -20 23 17 -21 41 3 -20 10 49 -21 53 27 -0.18 127 0 0 -21 15 16 12 8 19.4 21 107 -43 -20 36 26 -21 54 1 -20 23 59 -22 6 24 -0.18 128 0 0 -21 27 46 12 8 15.4 21 107 -44 -20 49 0 -22 6 26 -20 36 36 -22 18 47 -0.18 129 0 0 -21 39 42 12 8 11.2 22 106 -45 -21 1 1 -22 18 17 -20 48 38 -22 30 36 -0.18 130 0 0 -21 51 5 12 8 6.9 23 106 -46 -21 12 29 -22 29 36 -21 0 7 -22 41 53 -0.18 131 0 0 -22 1 54 12 8 2.5 24 106 -47 -21 23 23 -22 40 21 -21 11 3 -22 52 37 -0.18 132 0 0 -22 12 11 12 7 57.8 25 105 -48 -21 33 43 -22 50 33 -21 21 25 -23 2 48 -0.18 133 0 0 -22 21 55 12 7 53.1 26 105 -49 -21 43 31 -23 0 13 -21 31 14 -23 12 27 -0.18 134 0 0 -22 31 6 12 7 48.2 27 105 -50 -21 52 46 -23 9 20 -21 40 30 -23 21 33 -0.18 135 0 0 -22 39 44 12 7 43.2 28 104 -51 -22 1 28 -23 17 55 -21 49 13 -23 30 6 -0.18 136 0 0 -22 47 50 12 7 38.0 29 104 -52 -22 9 37 -23 25 58 -21 57 23 -23 38 8 -0.18 137 0 0 -22 55 24 12 7 32.7 30 104 -53 -22 17 14 -23 33 28 -22 5 1 -23 45 38 -0.18 138 0 0 -23 2 25 12 7 27.2 31 103 -54 -22 24 18 -23 40 27 -22 12 6 -23 52 35 -0.18 139 0 0 -23 8 55 12 7 21.7 32 103 -54 -22 30 51 -23 46 54 -22 18 40 -23 59 1 -0.18 140 0 0 -23 14 52 12 7 16.0 32 103 -55 -22 36 51 -23 52 49 -22 24 40 -24 4 56 -0.18 141 0 0 -23 20 18 12 7 10.1 33 102 -56 -22 42 19 -23 58 12 -22 30 9 -24 10 18 -0.18 142 0 0 -23 25 12 12 7 4.2 34 102 -57 -22 47 15 -24 3 5 -22 35 6 -24 15 10 -0.18 143 0 0 -23 29 35 12 6 58.1 35 102 -58 -22 51 40 -24 7 25 -22 39 31 -24 19 30 -0.18 144 0 0 -23 33 26 12 6 51.9 36 101 -59 -22 55 33 -24 11 15 -22 43 25 -24 23 19 -0.18 145 0 0 -23 36 46 12 6 45.6 37 101 -60 -22 58 54 -24 14 33 -22 46 47 -24 26 37 -0.18 146 0 0 -23 39 35 12 6 39.1 38 101 -61 -23 1 44 -24 17 21 -22 49 37 -24 29 24 -0.18 147 0 0 -23 41 52 12 6 32.5 39 101 -62 -23 4 2 -24 19 37 -22 51 56 -24 31 40 -0.18 148 0 0 -23 43 38 12 6 25.8 40 100 -62 -23 5 49 -24 21 22 -22 53 43 -24 33 25 -0.18 149 0 0 -23 44 53 12 6 19.0 40 100 -63 -23 7 5 -24 22 37 -22 54 59 -24 34 40 -0.18 150 0 0 -23 45 38 12 6 12.1 41 100 -64 -23 7 50 -24 23 21 -22 55 44 -24 35 23 -0.18 151 0 0 -23 45 51 12 6 5.1 42 99 -65 -23 8 3 -24 23 34 -22 55 57 -24 35 36 -0.18 152 0 0 -23 45 33 12 5 57.9 43 99 -66 -23 7 45 -24 23 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177 0 0 -20 51 23 12 2 22.7 65 99 -88 -20 12 33 -21 30 9 -20 0 7 -21 42 31 -0.18 178 0 0 -20 37 42 12 2 12.7 66 99 -88 -19 58 47 -21 16 32 -19 46 19 -21 28 56 -0.18 179 0 0 -20 23 30 12 2 2.6 66 100 -88 -19 44 30 -21 2 25 -19 32 0 -21 14 50 -0.18 -180 0 0 -20 8 46 12 1 52.4 67 100 -88 -19 29 41 -20 47 46 -19 17 10 -21 0 13 -0.18 -179 0 0 -19 53 31 12 1 42.1 68 101 -87 -19 14 20 -20 32 36 -19 1 47 -20 45 5 -0.18 -178 0 0 -19 37 44 12 1 31.7 69 102 -86 -18 58 28 -20 16 55 -18 45 53 -20 29 25 -0.18 -177 0 0 -19 21 25 12 1 21.3 70 103 -85 -18 42 4 -20 0 42 -18 29 28 -20 13 14 -0.18 -176 0 0 -19 4 35 12 1 10.7 71 104 -84 -18 25 8 -19 43 58 -18 12 30 -19 56 32 -0.18 -175 0 0 -18 47 14 12 1 0.0 71 105 -84 -18 7 40 -19 26 42 -17 55 1 -19 39 18 -0.18 -174 0 0 -18 29 20 12 0 49.2 72 106 -83 -17 49 41 -19 8 55 -17 36 59 -19 21 32 -0.18 -173 0 0 -18 10 55 12 0 38.3 73 108 -82 -17 31 10 -18 50 36 -17 18 26 -19 3 15 -0.18 -172 0 0 -17 51 59 12 0 27.4 74 109 -81 -17 12 7 -18 31 45 -16 59 21 -18 44 27 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-110 0 0 15 44 57 11 48 56.9 34 229 -14 16 30 37 14 59 26 16 45 15 14 44 55 -0.20 -109 0 0 16 23 29 11 48 49.6 33 229 -13 17 9 8 15 37 59 17 23 46 15 23 28 -0.20 -108 0 0 17 1 50 11 48 42.5 31 229 -12 17 47 28 16 16 21 18 2 5 16 1 51 -0.20 -107 0 0 17 39 59 11 48 35.7 30 230 -10 18 25 35 16 54 32 18 40 11 16 40 2 -0.20 -106 0 0 18 17 55 11 48 29.1 29 230 -9 19 3 28 17 32 30 19 18 4 17 18 0 -0.20 -105 0 0 18 55 36 11 48 22.7 28 230 -8 19 41 7 18 10 13 19 55 42 17 55 45 -0.20 -104 0 0 19 33 1 11 48 16.6 27 231 -7 20 18 30 18 47 42 20 33 4 18 33 14 -0.20 -103 0 0 20 10 10 11 48 10.8 26 231 -6 20 55 35 19 24 54 21 10 8 19 10 27 -0.20 -102 0 0 20 47 1 11 48 5.2 25 232 -5 21 32 23 20 1 48 21 46 55 19 47 23 -0.20 -101 0 0 21 23 34 11 47 59.9 24 232 -4 22 8 52 20 38 25 22 23 22 20 24 0 -0.20 -100 0 0 21 59 47 11 47 54.8 23 232 -3 22 45 0 21 14 42 22 59 30 21 0 19 -0.20 - 99 0 0 22 35 39 11 47 50.0 21 233 -2 23 20 48 21 50 39 23 35 16 21 36 17 -0.20 - 98 0 0 23 11 10 11 47 45.4 20 233 -1 23 56 14 22 26 14 24 10 40 22 11 54 -0.20 - 97 0 0 23 46 18 11 47 41.1 19 234 0 24 31 17 23 1 27 24 45 42 22 47 9 -0.20 - 96 0 0 24 21 3 11 47 37.0 18 234 1 25 5 57 23 36 18 25 20 20 23 22 1 -0.20 - 95 0 0 24 55 24 11 47 33.1 17 234 3 25 40 12 24 10 45 25 54 33 23 56 30 -0.20 - 94 0 0 25 29 21 11 47 29.5 16 235 4 26 14 2 24 44 47 26 28 21 24 30 34 -0.20 - 93 0 0 26 2 51 11 47 26.2 15 235 5 26 47 27 25 18 24 27 1 44 25 4 13 -0.20 - 92 0 0 26 35 56 11 47 23.1 14 236 6 27 20 25 25 51 34 27 34 40 25 37 26 -0.20 - 91 0 0 27 8 33 11 47 20.2 13 236 7 27 52 56 26 24 19 28 7 8 26 10 12 -0.20 - 90 0 0 27 40 43 11 47 17.6 12 237 8 28 24 59 26 56 36 28 39 9 26 42 31 -0.20 - 89 0 0 28 12 25 11 47 15.2 11 237 9 28 56 34 27 28 25 29 10 42 27 14 23 -0.20 - 88 0 0 28 43 39 11 47 13.0 10 238 10 29 27 40 27 59 46 29 41 46 27 45 46 -0.20 - 87 0 0 29 14 24 11 47 11.0 9 238 11 29 58 17 28 30 38 30 12 20 28 16 40 -0.20 - 86 0 0 29 44 39 11 47 9.3 8 239 12 30 28 24 29 1 1 30 42 25 28 47 6 -0.20 - 85 0 0 30 14 24 11 47 7.8 7 239 13 30 58 2 29 30 54 31 12 0 29 17 1 -0.19 - 84 0 0 30 43 39 11 47 6.5 6 240 14 31 27 9 30 0 17 31 41 5 29 46 27 -0.19 - 83 0 0 31 12 24 11 47 5.3 5 240 14 31 55 45 30 29 10 32 9 38 30 15 22 -0.19 - 82 0 0 31 40 38 11 47 4.5 4 241 15 32 23 51 30 57 32 32 37 41 30 43 47 -0.19 - 81 0 0 32 8 21 11 47 3.8 3 241 16 32 51 25 31 25 23 33 5 13 31 11 40 -0.18 - 80 0 0 32 35 32 11 47 3.3 2 242 17 33 18 28 31 52 43 33 32 13 31 39 3 -0.18 - 79 0 0 33 2 12 11 47 2.9 1 242 18 33 45 0 32 19 31 33 58 42 32 5 54 -0.15 - 78 0 0 33 28 20 11 47 2.8 0 243 19 .. .. .. 32 45 48 .. .. .. 32 32 14 0.04 Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 339-113933 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 00 38.1721 DE: -22 22 18.083 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 00 38.1722 DE: -22 22 18.083 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (146) Lucina asteroid class: approx. diameter [km]: 137 approx. diameter ["]: 0.118 distance from Earth [AU]: 1.60100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#117 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): 0.028", 0.006", 104.691° remarks: * orbital elements for (146)Lucina : Mean anomaly = 27.8179092242 deg Arg. of pericenter = 145.4208287697 deg Long. of node = 83.9296135322 deg Inclination = 13.0990320209 deg Eccentricity = 0.0661583552 Semimajor axis = 2.7182438326 AU Perihelion dist = 2.5384092916 AU Mag: H = 8.41, G = 0.11 Epoch of elements : MJD 60092.49847222 TDT (2023 May 28.4985) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1172023Apr24,14.44,2023,5,28,11.967404,-0.079024,0.160570,-4.811004,-2.368457,-0.002169,-0.000104,0.000001,0.000000 -154.7664,-22.3730,-0.19,21.47,False UCAC4 339-113933,18.01060337,-22.3716896,0.00,12.47,0.00,0.0,0,,18.03434215,-22.3730230,0.58,0.00,0,0,0 146,Lucina,12.09,137.2,1.6010,0,0,-1.906,-13.01,,7.6,0 0,27.7083,2023,5,28,145.4208,83.9296,13.0990,0.06616,2.71824,2.53841,8.42,5.0,0.15 1.160,0.0280,0.0060,105,0.0189,Known errors,-1.00,-1,-1,-1 20230528_113933,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org