IOTA/IOTA-ES occultation update for (146) Lucina / UCAC4 302-209131 event on 2023 Oct 16, 08:49 UT Visible from Japan Summary ------- On 2023 Oct 16 UT, the 137.2 km diameter asteroid (146) Lucina will occult a 11.5 mag star in the constellation Sagittarius for observers along a path across Japan. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.40 mag to 13.77 mag (the magnitude of the asteroid) for at most 4.970 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 Oct 16, 08:47 - 2023 Oct 16, 08:50 * geocentric midpoint of event [JD]: 2460233.86752138 * magnitude of target star: 11.50 * magnitude drop [mag]: 2.40 * estimated maximum duration [s]: 4.970 * Moon: 3 % sunlit, 51° distance * Sun: 71° distance * rough path description: Japan Additional comments ------------------- low altitude The occultation path -------------------- * approximate projected width [km]: 356 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.000", 102°) * approx speed of asteroid's shadow [km/s]: 27.6057 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 302-209131 by 146 Lucina on 2023 Oct 16 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 0 0 0 .. .. .... .. .. .. .. .. .. 52 33 15 .. .. .. 52 26 39 .. .. .. .... 0 0 0 .. .. .... .. .. .. .. .. .. 51 42 35 .. .. .. 51 36 14 .. .. .. .... 80 0 0 53 33 48 8 47 46.4 1 148 21 50 53 47 .. .. .. 50 47 39 .. .. .. .... 81 0 0 52 40 46 8 47 46.6 2 149 21 50 6 45 .. .. .. 50 0 48 .. .. .. -1.45 82 0 0 51 50 6 8 47 47.0 3 150 21 49 21 24 54 51 8 49 15 38 54 59 51 -1.81 83 0 0 51 1 36 8 47 47.6 4 150 22 48 37 40 53 54 10 48 32 3 54 2 22 -1.98 84 0 0 50 15 9 8 47 48.4 5 151 22 47 55 30 53 0 25 47 50 1 53 8 11 -2.08 85 0 0 49 30 35 8 47 49.4 6 152 22 47 14 49 52 9 31 47 9 28 52 16 55 -2.14 86 0 0 48 47 51 8 47 50.5 7 153 22 46 35 36 51 21 10 46 30 22 51 28 16 -2.18 87 0 0 48 6 50 8 47 51.7 8 154 22 45 57 48 50 35 11 45 52 41 50 42 0 -2.22 88 0 0 47 27 29 8 47 53.1 9 154 22 45 21 22 49 51 23 45 16 22 49 57 58 -2.24 89 0 0 46 49 42 8 47 54.7 9 155 22 44 46 17 49 9 38 44 41 23 49 15 59 -2.26 90 0 0 46 13 28 8 47 56.3 10 156 22 44 12 32 48 29 48 44 7 42 48 35 58 -2.28 91 0 0 45 38 43 8 47 58.1 11 157 21 43 40 5 47 51 47 43 35 20 47 57 47 -2.29 92 0 0 45 5 26 8 48 0.0 12 158 21 43 8 54 47 15 31 43 4 14 47 21 22 -2.31 93 0 0 44 33 33 8 48 1.9 13 158 21 42 38 59 46 40 55 42 34 23 46 46 38 -2.32 94 0 0 44 3 3 8 48 4.0 13 159 21 42 10 17 46 7 56 42 5 46 46 13 31 -2.33 95 0 0 43 33 54 8 48 6.2 14 160 20 41 42 49 45 36 30 41 38 21 45 41 58 -2.33 96 0 0 43 6 5 8 48 8.5 15 161 20 41 16 34 45 6 35 41 12 9 45 11 57 -2.34 97 0 0 42 39 34 8 48 10.9 15 162 20 40 51 30 44 38 9 40 47 8 44 43 25 -2.35 98 0 0 42 14 20 8 48 13.3 16 163 19 40 27 37 44 11 8 40 23 18 44 16 19 -2.35 99 0 0 41 50 22 8 48 15.8 17 163 19 40 4 54 43 45 32 40 0 38 43 50 38 -2.36 100 0 0 41 27 39 8 48 18.4 17 164 18 39 43 20 43 21 18 39 39 7 43 26 20 -2.37 101 0 0 41 6 9 8 48 21.1 18 165 18 39 22 55 42 58 26 39 18 45 43 3 23 -2.37 102 0 0 40 45 53 8 48 23.8 18 166 18 39 3 39 42 36 53 38 59 30 42 41 47 -2.38 103 0 0 40 26 49 8 48 26.6 19 167 17 38 45 30 42 16 39 38 41 24 42 21 29 -2.38 104 0 0 40 8 57 8 48 29.4 19 168 16 38 28 29 41 57 42 38 24 24 42 2 29 -2.38 105 0 0 39 52 16 8 48 32.3 20 169 16 38 12 34 41 40 1 38 8 32 41 44 46 -2.39 106 0 0 39 36 45 8 48 35.3 20 170 15 37 57 47 41 23 36 37 53 46 41 28 18 -2.39 107 0 0 39 22 24 8 48 38.3 20 171 15 37 44 5 41 8 26 37 40 5 41 13 6 -2.39 108 0 0 39 9 13 8 48 41.3 21 171 14 37 31 29 40 54 30 37 27 31 40 59 8 -2.40 109 0 0 38 57 10 8 48 44.4 21 172 13 37 19 59 40 41 47 37 16 2 40 46 23 -2.40 110 0 0 38 46 17 8 48 47.4 21 173 13 37 9 34 40 30 17 37 5 38 40 34 51 -2.40 111 0 0 38 36 31 8 48 50.6 22 174 12 37 0 14 40 20 0 36 56 19 40 24 32 -2.41 112 0 0 38 27 53 8 48 53.7 22 175 11 36 51 59 40 10 54 36 48 5 40 15 25 -2.41 113 0 0 38 20 24 8 48 56.9 22 176 11 36 44 48 40 3 1 36 40 55 40 7 30 -2.41 114 0 0 38 14 1 8 49 0.1 22 177 10 36 38 43 39 56 18 36 34 50 40 0 47 -2.41 115 0 0 38 8 47 8 49 3.3 22 178 9 36 33 41 39 50 47 36 29 49 39 55 15 -2.42 116 0 0 38 4 39 8 49 6.5 22 179 9 36 29 44 39 46 26 36 25 52 39 50 53 -2.42 117 0 0 38 1 38 8 49 9.7 22 180 8 36 26 51 39 43 16 36 23 0 39 47 43 -2.42 118 0 0 37 59 44 8 49 12.9 22 181 7 36 25 2 39 41 16 36 21 11 39 45 42 -2.42 119 0 0 37 58 57 8 49 16.2 22 182 6 36 24 17 39 40 26 36 20 26 39 44 53 -2.42 120 0 0 37 59 17 8 49 19.4 22 183 5 36 24 36 39 40 47 36 20 45 39 45 14 -2.42 121 0 0 38 0 44 8 49 22.6 22 184 5 36 25 59 39 42 18 36 22 8 39 46 45 -2.43 122 0 0 38 3 18 8 49 25.8 22 185 4 36 28 27 39 45 0 36 24 35 39 49 27 -2.43 123 0 0 38 6 58 8 49 29.0 22 186 3 36 31 58 39 48 52 36 28 6 39 53 20 -2.43 124 0 0 38 11 46 8 49 32.2 22 187 2 36 36 34 39 53 55 36 32 41 39 58 23 -2.43 125 0 0 38 17 41 8 49 35.3 22 188 2 36 42 13 40 0 9 36 38 20 40 4 38 -2.43 126 0 0 38 24 43 8 49 38.5 21 188 1 36 48 58 40 7 33 36 45 4 40 12 4 -2.43 127 0 0 38 32 53 8 49 41.6 21 189 0 36 56 47 40 16 9 36 52 52 40 20 41 -2.43 128 0 0 38 42 11 8 49 44.6 21 190 -1 37 5 40 40 25 57 37 1 45 40 30 30 -2.43 129 0 0 38 52 37 8 49 47.7 21 191 -2 37 15 39 40 36 57 37 11 42 40 41 32 -2.44 130 0 0 39 4 12 8 49 50.7 20 192 -2 37 26 42 40 49 10 37 22 45 40 53 47 -2.44 131 0 0 39 16 55 8 49 53.6 20 193 -3 37 38 52 41 2 36 37 34 53 41 7 15 -2.44 132 0 0 39 30 47 8 49 56.5 20 194 -4 37 52 6 41 17 16 37 48 6 41 21 57 -2.44 133 0 0 39 45 49 8 49 59.4 19 195 -5 38 6 27 41 33 10 38 2 25 41 37 53 -2.44 134 0 0 40 2 1 8 50 2.2 19 196 -6 38 21 54 41 50 19 38 17 51 41 55 5 -2.44 135 0 0 40 19 24 8 50 4.9 18 197 -7 38 38 28 42 8 44 38 34 23 42 13 33 -2.44 136 0 0 40 37 58 8 50 7.6 18 197 -7 38 56 9 42 28 26 38 52 2 42 33 19 -2.44 137 0 0 40 57 44 8 50 10.2 17 198 -8 39 14 57 42 49 26 39 10 48 42 54 22 -2.44 138 0 0 41 18 43 8 50 12.8 16 199 -9 39 34 54 43 11 45 39 30 42 43 16 45 -2.45 139 0 0 41 40 55 8 50 15.3 16 200 -10 39 55 59 43 35 25 39 51 44 43 40 29 -2.45 140 0 0 42 4 22 8 50 17.7 15 201 -10 40 18 12 44 0 26 40 13 55 44 5 35 -2.45 141 0 0 42 29 4 8 50 20.0 15 202 -11 40 41 36 44 26 51 40 37 16 44 32 5 -2.45 142 0 0 42 55 2 8 50 22.2 14 202 -12 41 6 11 44 54 41 41 1 48 45 0 1 -2.45 143 0 0 43 22 18 8 50 24.3 13 203 -13 41 31 57 45 23 58 41 27 31 45 29 24 -2.46 144 0 0 43 50 53 8 50 26.4 12 204 -13 41 58 54 45 54 46 41 54 25 46 0 18 -2.46 145 0 0 44 20 49 8 50 28.3 12 205 -14 42 27 4 46 27 5 42 22 30 46 32 44 -2.46 146 0 0 44 52 6 8 50 30.1 11 206 -15 42 56 28 47 0 59 42 51 50 47 6 46 -2.47 147 0 0 45 24 47 8 50 31.9 10 206 -16 43 27 6 47 36 31 43 22 24 47 42 27 -2.47 148 0 0 45 58 54 8 50 33.5 9 207 -16 43 59 0 48 13 46 43 54 13 48 19 52 -2.48 149 0 0 46 34 30 8 50 34.9 8 208 -17 44 32 12 48 52 48 44 27 20 48 59 5 -2.49 150 0 0 47 11 36 8 50 36.3 8 209 -17 45 6 42 49 33 43 45 1 44 49 40 12 -2.50 151 0 0 47 50 15 8 50 37.5 7 210 -18 45 42 32 50 16 36 45 37 28 50 23 19 -2.51 152 0 0 48 30 32 8 50 38.6 6 210 -19 46 19 44 51 1 37 46 14 33 51 8 35 -2.53 153 0 0 49 12 31 8 50 39.5 5 211 -19 46 58 19 51 48 53 46 53 2 51 56 8 -2.55 154 0 0 49 56 15 8 50 40.3 4 212 -20 47 38 21 52 38 37 47 32 56 52 46 13 -2.59 155 0 0 50 41 51 8 50 40.9 3 213 -20 48 19 52 53 31 5 48 14 19 53 39 5 -2.66 156 0 0 51 29 25 8 50 41.3 2 213 -21 49 2 55 .. .. .. 48 57 13 .. .. .. -2.80 157 0 0 52 19 6 8 50 41.5 1 214 -21 49 47 32 .. .. .. 49 41 40 .. .. .. -3.30 0 0 0 .. .. .... .. .. .. .. .. .. 50 33 48 .. .. .. 50 27 45 .. .. .. .... 0 0 0 .. .. .... .. .. .. .. .. .. 51 21 48 .. .. .. 51 15 33 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4 302-209131 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 14 26.3337 DE: -29 43 47.333 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 14 26.3336 DE: -29 43 47.333 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (146) Lucina asteroid class: approx. diameter [km]: 137 approx. diameter ["]: 0.068 distance from Earth [AU]: 2.78680 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#120 date of fit: 2023 Oct 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): 0.007", 0.000", 102.286° remarks: * orbital elements for (146)Lucina : Mean anomaly = 58.8956409629 deg Arg. of pericenter = 145.3289128939 deg Long. of node = 83.9304963704 deg Inclination = 13.0998009241 deg Eccentricity = 0.0660334004 Semimajor axis = 2.7177721652 AU Perihelion dist = 2.5383084276 AU Mag: H = 8.54, G = 0.11 Epoch of elements : MJD 60233.36750000 TDT (2023 Oct 16.3675) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1202023Oct09,4.97,2023,10,16,8.820513,0.016805,0.922809,15.578702,-0.290182,0.005441,-0.000059,-0.000001,0.000000 117.0595,-29.7242,44.11,-8.84,False UCAC4 302-209131,18.24064828,-29.7298147,0.00,11.50,0.00,0.0,0,,18.26567400,-29.7241582,2.40,0.00,0,0,0 146,Lucina,13.77,137.200,2.7868,0,0,3.774,-0.91,,7.6,0 0,58.8148,2023,10,16,145.3289,83.9305,13.0998,0.06603,2.71777,2.53831,8.41,5.0,0.15 1.021,0.0070,0.0004,102,0.0070,Known errors,-1.00,0,-1,-1 20231016_209131,60232.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 20:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org