IOTA/IOTA-ES occultation update for (393) Lampetia / UCAC4 406-092201 event on 2023 Apr 22, 19:12 UT Visible from China, SE Asia, India Summary ------- On 2023 Apr 22 UT, the 129.2 km diameter asteroid (393) Lampetia will occult a 12.3 mag star in the constellation Scutum for observers along a path across China, SE Asia, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.66 mag to 12.06 mag (the magnitude of the asteroid) for at most 8.290 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 Apr 22, 19:07 - 2023 Apr 22, 19:16 * geocentric midpoint of event [JD]: 2460057.30004896 * magnitude of target star: 12.26 * magnitude drop [mag]: 0.66 * estimated maximum duration [s]: 8.290 * Moon: 7 % sunlit, 138° distance * Sun: 109° distance * rough path description: China, SE Asia, India The occultation path -------------------- * approximate projected width [km]: 190 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.003", 78°) * approx speed of asteroid's shadow [km/s]: 15.5924 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 406-092201 by 393 Lampetia on 2023 Apr 22 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 57 0 0 7 42 34 19 7 25.9 1 99 -65 6 51 4 8 34 55 6 41 14 8 45 6 .... 58 0 0 7 34 21 19 7 26.1 2 99 -65 6 42 57 8 26 36 6 33 9 8 36 46 -0.74 59 0 0 7 27 9 19 7 26.6 3 99 -66 6 35 49 8 19 19 6 26 2 8 29 27 -0.86 60 0 0 7 20 56 19 7 27.2 4 100 -67 6 29 41 8 13 2 6 19 55 8 23 10 -0.92 61 0 0 7 15 44 19 7 28.0 5 100 -67 6 24 32 8 7 46 6 14 46 8 17 53 -0.95 62 0 0 7 11 31 19 7 28.9 6 100 -68 6 20 22 8 3 31 6 10 36 8 13 37 -0.98 63 0 0 7 8 19 19 7 30.1 7 100 -68 6 17 10 8 0 16 6 7 25 8 10 23 -0.99 64 0 0 7 6 6 19 7 31.4 8 100 -69 6 14 59 7 58 3 6 5 14 8 8 9 -1.01 65 0 0 7 4 53 19 7 32.9 9 100 -69 6 13 46 7 56 50 6 4 1 8 6 56 -1.01 66 0 0 7 4 41 19 7 34.6 10 100 -70 6 13 33 7 56 39 6 3 48 8 6 45 -1.02 67 0 0 7 5 29 19 7 36.5 11 101 -70 6 14 19 7 57 29 6 4 33 8 7 35 -1.03 68 0 0 7 7 17 19 7 38.5 12 101 -70 6 16 5 7 59 20 6 6 19 8 9 27 -1.03 69 0 0 7 10 6 19 7 40.7 13 101 -70 6 18 50 8 2 12 6 9 4 8 12 20 -1.04 70 0 0 7 13 56 19 7 43.1 14 101 -70 6 22 36 8 6 7 6 12 49 8 16 15 -1.04 71 0 0 7 18 47 19 7 45.7 15 101 -70 6 27 22 8 11 3 6 17 33 8 21 13 -1.05 72 0 0 7 24 39 19 7 48.5 16 101 -70 6 33 8 8 17 2 6 23 18 8 27 13 -1.05 73 0 0 7 31 33 19 7 51.4 17 102 -70 6 39 55 8 24 3 6 30 4 8 34 15 -1.05 74 0 0 7 39 29 19 7 54.5 18 102 -70 6 47 43 8 32 7 6 37 51 8 42 21 -1.06 75 0 0 7 48 27 19 7 57.8 18 102 -70 6 56 32 8 41 14 6 46 38 8 51 30 -1.06 76 0 0 7 58 28 19 8 1.3 19 102 -69 7 6 23 8 51 25 6 56 28 9 1 43 -1.06 77 0 0 8 9 31 19 8 4.9 20 103 -69 7 17 16 9 2 40 7 7 19 9 13 0 -1.06 78 0 0 8 21 38 19 8 8.7 21 103 -69 7 29 12 9 14 59 7 19 12 9 25 22 -1.06 79 0 0 8 34 49 19 8 12.7 22 103 -68 7 42 10 9 28 23 7 32 8 9 38 49 -1.07 80 0 0 8 49 5 19 8 16.9 23 104 -68 7 56 12 9 42 53 7 46 7 9 53 21 -1.07 81 0 0 9 4 25 19 8 21.3 24 104 -67 8 11 17 9 58 28 8 1 10 10 8 59 -1.07 82 0 0 9 20 50 19 8 25.8 25 104 -66 8 27 27 10 15 10 8 17 17 10 25 44 -1.07 83 0 0 9 38 21 19 8 30.5 26 105 -66 8 44 42 10 32 59 8 34 29 10 43 37 -1.07 84 0 0 9 56 59 19 8 35.4 27 105 -65 9 3 2 10 51 55 8 52 45 11 2 36 -1.07 85 0 0 10 16 43 19 8 40.5 28 106 -64 9 22 28 11 11 59 9 12 7 11 22 45 -1.07 86 0 0 10 37 35 19 8 45.7 28 106 -63 9 43 0 11 33 12 9 32 36 11 44 2 -1.08 87 0 0 10 59 36 19 8 51.2 29 107 -63 10 4 39 11 55 35 9 54 11 12 6 29 -1.08 88 0 0 11 22 45 19 8 56.8 30 107 -62 10 27 25 12 19 7 10 16 53 12 30 6 -1.08 89 0 0 11 47 3 19 9 2.6 31 108 -61 10 51 20 12 43 51 10 40 44 12 54 54 -1.08 90 0 0 12 12 32 19 9 8.5 32 109 -60 11 16 24 13 9 46 11 5 43 13 20 55 -1.08 91 0 0 12 39 11 19 9 14.6 33 109 -59 11 42 38 13 36 53 11 31 52 13 48 7 -1.08 92 0 0 13 7 2 19 9 21.0 33 110 -58 12 10 1 14 5 13 11 59 10 14 16 33 -1.08 93 0 0 13 36 5 19 9 27.4 34 111 -57 12 38 36 14 34 47 12 27 39 14 46 13 -1.08 94 0 0 14 6 21 19 9 34.1 35 112 -56 13 8 21 15 5 35 12 57 19 15 17 7 -1.08 95 0 0 14 37 51 19 9 40.9 36 113 -55 13 39 19 15 37 38 13 28 11 15 49 17 -1.08 96 0 0 15 10 35 19 9 47.9 36 113 -54 14 11 30 16 10 57 14 0 16 16 22 44 -1.08 97 0 0 15 44 33 19 9 55.1 37 114 -53 14 44 54 16 45 33 14 33 33 16 57 27 -1.08 98 0 0 16 19 48 19 10 2.4 38 115 -52 15 19 32 17 21 26 15 8 5 17 33 28 -1.08 99 0 0 16 56 19 19 10 9.9 38 117 -51 15 55 25 17 58 38 15 43 51 18 10 48 -1.08 100 0 0 17 34 7 19 10 17.6 39 118 -49 16 32 33 18 37 9 16 20 52 18 49 28 -1.08 101 0 0 18 13 13 19 10 25.4 39 119 -48 17 10 57 19 16 59 16 59 8 19 29 27 -1.08 102 0 0 18 53 37 19 10 33.4 40 120 -47 17 50 38 19 58 10 17 38 41 20 10 47 -1.08 103 0 0 19 35 20 19 10 41.5 40 121 -46 18 31 36 20 40 42 18 19 30 20 53 29 -1.08 104 0 0 20 18 23 19 10 49.7 41 123 -45 19 13 51 21 24 36 19 1 36 21 37 33 -1.08 105 0 0 21 2 45 19 10 58.1 41 124 -43 19 57 24 22 9 52 19 45 0 22 23 0 -1.08 106 0 0 21 48 28 19 11 6.7 42 125 -42 20 42 15 22 56 31 20 29 42 23 9 50 -1.08 107 0 0 22 35 32 19 11 15.4 42 127 -41 21 28 25 23 44 33 21 15 42 23 58 5 -1.08 108 0 0 23 23 57 19 11 24.2 42 128 -40 22 15 54 24 34 0 22 3 0 24 47 43 -1.08 109 0 0 24 13 43 19 11 33.1 42 130 -39 23 4 41 25 24 50 22 51 37 25 38 46 -1.08 110 0 0 25 4 51 19 11 42.1 43 131 -37 23 54 48 26 17 5 23 41 32 26 31 15 -1.08 111 0 0 25 57 21 19 11 51.2 43 133 -36 24 46 13 27 10 44 24 32 46 27 25 8 -1.08 112 0 0 26 51 12 19 12 0.4 43 135 -35 25 38 58 28 5 48 25 25 18 28 20 28 -1.08 113 0 0 27 46 24 19 12 9.7 43 136 -33 26 33 0 29 2 17 26 19 9 29 17 12 -1.08 114 0 0 28 42 57 19 12 19.0 43 138 -32 27 28 21 30 0 10 27 14 16 30 15 22 -1.08 115 0 0 29 40 51 19 12 28.5 43 140 -31 28 25 0 30 59 28 28 10 41 31 14 56 -1.08 116 0 0 30 40 5 19 12 37.9 42 142 -29 29 22 55 32 0 9 29 8 22 32 15 56 -1.08 117 0 0 31 40 37 19 12 47.4 42 143 -28 30 22 5 33 2 13 30 7 18 33 18 19 -1.08 118 0 0 32 42 28 19 12 56.9 42 145 -27 31 22 31 34 5 40 31 7 28 34 22 5 -1.08 119 0 0 33 45 36 19 13 6.4 41 147 -25 32 24 9 35 10 28 32 8 50 35 27 14 -1.08 120 0 0 34 49 58 19 13 15.9 41 148 -24 33 27 0 36 16 36 33 11 24 36 33 44 -1.08 121 0 0 35 55 35 19 13 25.4 40 150 -23 34 31 0 37 24 2 34 15 7 37 41 33 -1.08 122 0 0 37 2 23 19 13 34.8 40 152 -21 35 36 8 38 32 45 35 19 57 38 50 40 -1.08 123 0 0 38 10 21 19 13 44.2 39 154 -20 36 42 21 39 42 43 36 25 51 40 1 3 -1.08 124 0 0 39 19 25 19 13 53.5 39 155 -19 37 49 37 40 53 53 37 32 48 41 12 40 -1.08 125 0 0 40 29 33 19 14 2.6 38 157 -18 38 57 52 42 6 13 38 40 43 42 25 28 -1.08 126 0 0 41 40 42 19 14 11.7 37 158 -16 40 7 4 43 19 40 39 49 35 43 39 25 -1.08 127 0 0 42 52 49 19 14 20.6 36 160 -15 41 17 8 44 34 10 40 59 18 44 54 26 -1.08 128 0 0 44 5 48 19 14 29.4 35 161 -14 42 28 1 45 49 40 42 9 49 46 10 28 -1.08 129 0 0 45 19 36 19 14 38.0 34 163 -12 43 39 39 47 6 6 43 21 3 47 27 28 -1.08 130 0 0 46 34 8 19 14 46.4 33 164 -11 44 51 55 48 23 22 44 32 56 48 45 21 -1.08 131 0 0 47 49 18 19 14 54.6 32 166 -10 46 4 46 49 41 25 45 45 23 50 4 1 -1.08 132 0 0 49 5 2 19 15 2.5 31 167 -9 47 18 5 51 0 7 46 58 18 51 23 23 -1.08 133 0 0 50 21 12 19 15 10.2 30 169 -7 48 31 47 52 19 23 48 11 34 52 43 21 -1.08 134 0 0 51 37 42 19 15 17.6 29 170 -6 49 45 44 53 39 7 49 25 6 54 3 49 -1.08 135 0 0 52 54 24 19 15 24.7 28 171 -5 50 59 51 54 59 12 50 38 46 55 24 39 -1.08 136 0 0 54 11 12 19 15 31.6 27 172 -4 52 13 59 56 19 28 51 52 28 56 45 43 -1.08 137 0 0 55 27 57 19 15 38.1 26 174 -3 53 28 1 57 39 47 53 6 3 58 6 53 -1.08 138 0 0 56 44 29 19 15 44.2 24 175 -2 54 41 50 59 0 1 54 19 24 59 27 58 -1.08 139 0 0 58 0 40 19 15 50.1 23 176 -1 55 55 15 60 19 58 55 32 22 60 48 50 -1.09 140 0 0 59 16 20 19 15 55.6 22 177 0 57 8 9 61 39 29 56 44 50 62 9 16 -1.09 141 0 0 60 31 19 19 16 0.7 21 178 1 58 20 23 62 58 20 57 56 37 63 29 5 -1.09 142 0 0 61 45 25 19 16 5.5 19 179 2 59 31 47 64 16 21 59 7 35 64 48 4 -1.09 143 0 0 62 58 29 19 16 9.9 18 180 3 60 42 12 65 33 18 60 17 35 66 6 0 -1.09 144 0 0 64 10 19 19 16 13.9 17 181 4 61 51 29 66 48 56 61 26 28 67 22 37 -1.10 145 0 0 65 20 43 19 16 17.6 16 182 5 62 59 28 68 3 3 62 34 4 68 37 41 -1.10 146 0 0 66 29 32 19 16 21.0 15 183 6 64 6 1 69 15 22 63 40 16 69 50 56 -1.10 147 0 0 67 36 33 19 16 24.0 13 184 6 65 10 58 70 25 40 64 44 54 71 2 6 -1.10 148 0 0 68 41 37 19 16 26.7 12 185 7 66 14 12 71 33 41 65 47 51 72 10 56 -1.11 149 0 0 69 44 33 19 16 29.1 11 186 8 67 15 35 72 39 13 66 49 0 73 17 10 -1.11 150 0 0 70 45 14 19 16 31.2 10 187 8 68 14 59 73 42 1 67 48 12 74 20 35 -1.11 151 0 0 71 43 32 19 16 33.0 9 188 9 69 12 19 74 41 56 68 45 24 75 20 58 -1.11 152 0 0 72 39 19 19 16 34.5 8 189 9 70 7 30 75 38 48 69 40 30 76 18 8 -1.12 153 0 0 73 32 32 19 16 35.8 7 190 10 71 0 28 76 32 30 70 33 25 77 11 59 -1.12 154 0 0 74 23 8 19 16 37.0 6 191 10 71 51 10 77 22 58 71 24 9 78 2 25 -1.13 155 0 0 75 11 4 19 16 37.9 6 192 10 72 39 35 78 10 11 72 12 38 78 49 26 -1.13 156 0 0 75 56 22 19 16 38.6 5 193 11 73 25 42 78 54 10 72 58 53 79 33 4 -1.14 157 0 0 76 39 2 19 16 39.2 4 194 11 74 9 31 79 34 59 73 42 53 80 13 23 -1.14 158 0 0 77 19 9 19 16 39.7 3 195 11 74 51 6 80 12 46 74 24 41 .. .. .. -1.15 159 0 0 77 56 46 19 16 40.1 3 196 12 75 30 27 .. .. .. 75 4 18 .. .. .. -1.16 160 0 0 78 31 58 19 16 40.3 2 197 12 76 7 39 .. .. .. 75 41 49 .. .. .. -1.18 161 0 0 79 4 53 19 16 40.5 1 198 12 76 42 46 .. .. .. 76 17 17 .. .. .. -1.20 162 0 0 79 35 37 19 16 40.6 1 199 12 77 15 53 .. .. .. 76 50 45 .. .. .. -1.25 163 0 0 80 4 17 19 16 40.7 0 200 13 77 47 4 .. .. .. 77 22 20 .. .. .. -1.41 164 0 0 .. .. .... .. .. .. .. .. .. 78 16 25 .. .. .. 77 52 6 .. .. .. .... 165 0 0 .. .. .... .. .. .. .. .. .. 78 44 1 .. .. .. 78 20 9 .. .. .. .... 166 0 0 .. .. .... .. .. .. .. .. .. 79 9 59 .. .. .. 78 46 33 .. .. .. .... 167 0 0 .. .. .... .. .. .. .. .. .. 79 34 24 .. .. .. 79 11 25 .. .. .. .... 168 0 0 .. .. .... .. .. .. .. .. .. 79 57 20 .. .. .. 79 34 49 .. .. .. .... 169 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 79 56 50 .. .. .. .... Uncertainty in time = +/- 2 secs Prediction of 2023 Mar 1.1 Data for the target star ------------------------ * name: UCAC4 406-092201 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 48 17.5175 DE: -08 58 30.327 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 48 17.5176 DE: -08 58 30.327 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (393) Lampetia asteroid class: approx. diameter [km]: 129 approx. diameter ["]: 0.122 distance from Earth [AU]: 1.46470 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#126 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): 0.025", 0.003", 78.179° remarks: * orbital elements for (393)Lampetia : Mean anomaly = 335.6642710213 deg Arg. of pericenter = 90.8671310368 deg Long. of node = 212.3931382919 deg Inclination = 14.8773245069 deg Eccentricity = 0.3299831618 Semimajor axis = 2.7797170274 AU Perihelion dist = 1.8624572138 AU Mag: H = 8.43, G = 0.15 Epoch of elements : MJD 60056.80000000 TDT (2023 Apr 22.8000) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1262023Feb07,8.29,2023,4,22,19.201175,-0.463278,0.567483,6.817209,5.565961,-0.004893,-0.000869,0.000001,0.000000 143.7890,-8.9511,-108.39,12.31,False UCAC4 406-092201,18.80486596,-8.9750909,0.00,12.26,0.00,0.0,0,,18.82604775,-8.9510841,0.66,0.00,0,0,0 393,Lampetia,12.06,129.2,1.4647,0,0,2.762,33.43,,8.4,0 0,335.4941,2023,4,22,90.8671,212.3931,14.8773,0.32998,2.77972,1.86246,8.45,5.0,0.15 1.096,0.0247,0.0032,78,0.0117,Known errors,-1.00,-1,-1,-1 20230422_092201,60004.05 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Mar 01, 01:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org