IOTA/IOTA-ES occultation update for (393) Lampetia / UCAC4 476-090238 event on 2023 Jun 20, 11:53 UT Visible from Japan Summary ------- On 2023 Jun 20 UT, the 129.2 km diameter asteroid (393) Lampetia will occult a 12.3 mag star in the constellation Aquila 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 0.22 mag to 10.70 mag (the magnitude of the asteroid) for at most 20.240 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 Jun 20, 11:36 - 2023 Jun 20, 12:10 * geocentric midpoint of event [JD]: 2460115.99553417 * magnitude of target star: 12.31 * magnitude drop [mag]: 0.22 * estimated maximum duration [s]: 20.240 * Moon: 5 % sunlit, 147° distance * Sun: 146° distance * rough path description: Japan Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 131 * 1 sigma uncertainty interval [path widths]: +/- 0.18 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.036, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.036", 0.005", 81°) * approx speed of asteroid's shadow [km/s]: 6.3845 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 476-090238 by 393 Lampetia on 2023 Jun 20 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 101 0 0 47 21 26 12 9 59.7 0 83 9 47 56 59 46 45 50 48 9 52 46 32 54 .... 102 0 0 47 26 19 12 9 59.6 1 83 8 48 1 48 46 50 47 48 14 39 46 37 52 0.06 103 0 0 47 30 35 12 9 59.4 2 84 7 48 6 0 46 55 6 48 18 50 46 42 13 0.11 104 0 0 47 34 15 12 9 59.0 2 85 7 48 9 37 46 58 49 48 22 26 46 45 57 0.13 105 0 0 47 37 18 12 9 58.4 3 86 6 48 12 38 47 1 55 48 25 26 46 49 4 0.13 106 0 0 47 39 46 12 9 57.8 4 86 6 48 15 3 47 4 25 48 27 50 46 51 35 0.14 107 0 0 47 41 38 12 9 57.0 4 87 5 48 16 54 47 6 18 48 29 40 46 53 29 0.14 108 0 0 47 42 54 12 9 56.0 5 88 5 48 18 9 47 7 36 48 30 55 46 54 47 0.14 109 0 0 47 43 35 12 9 54.9 6 89 4 48 18 49 47 8 17 48 31 34 46 55 29 0.15 110 0 0 47 43 40 12 9 53.7 6 89 3 48 18 54 47 8 23 48 31 39 46 55 34 0.15 111 0 0 47 43 10 12 9 52.3 7 90 3 48 18 24 47 7 53 48 31 10 46 55 4 0.15 112 0 0 47 42 5 12 9 50.8 8 91 2 48 17 20 47 6 47 48 30 6 46 53 58 0.15 113 0 0 47 40 25 12 9 49.2 8 92 2 48 15 40 47 5 6 48 28 27 46 52 17 0.15 114 0 0 47 38 9 12 9 47.4 9 92 1 48 13 26 47 2 49 48 26 13 46 49 59 0.15 115 0 0 47 35 18 12 9 45.5 10 93 1 48 10 37 46 59 56 48 23 25 46 47 5 0.15 116 0 0 47 31 52 12 9 43.5 10 94 0 48 7 13 46 56 27 48 20 2 46 43 36 0.15 117 0 0 47 27 50 12 9 41.3 11 94 -1 48 3 14 46 52 22 48 16 3 46 39 30 0.15 118 0 0 47 23 12 12 9 39.0 12 95 -1 47 58 40 46 47 41 48 11 30 46 34 48 0.15 119 0 0 47 17 59 12 9 36.5 12 96 -2 47 53 30 46 42 24 48 6 22 46 29 29 0.15 120 0 0 47 12 9 12 9 33.9 13 97 -2 47 47 44 46 36 30 48 0 38 46 23 34 0.15 121 0 0 47 5 43 12 9 31.1 14 97 -3 47 41 23 46 30 0 47 54 18 46 17 1 0.15 122 0 0 46 58 40 12 9 28.2 14 98 -4 47 34 25 46 22 52 47 47 22 46 9 52 0.15 123 0 0 46 51 1 12 9 25.1 15 99 -4 47 26 51 46 15 7 47 39 50 46 2 5 0.15 124 0 0 46 42 44 12 9 21.9 16 99 -5 47 18 40 46 6 44 47 31 41 45 53 40 0.15 125 0 0 46 33 49 12 9 18.5 16 100 -5 47 9 52 45 57 43 47 22 56 45 44 37 0.14 126 0 0 46 24 17 12 9 14.9 17 101 -6 47 0 26 45 48 4 47 13 32 45 34 55 0.14 127 0 0 46 14 6 12 9 11.2 18 102 -7 46 50 23 45 37 45 47 3 31 45 24 34 0.14 128 0 0 46 3 16 12 9 7.3 19 102 -7 46 39 40 45 26 48 46 52 52 45 13 33 0.14 129 0 0 45 51 46 12 9 3.3 19 103 -8 46 28 19 45 15 10 46 41 33 45 1 53 0.14 130 0 0 45 39 37 12 8 59.0 20 104 -8 46 16 18 45 2 52 46 29 36 44 49 31 0.14 131 0 0 45 26 47 12 8 54.6 21 104 -9 46 3 38 44 49 53 46 16 58 44 36 29 0.14 132 0 0 45 13 16 12 8 50.0 21 105 -10 45 50 16 44 36 12 46 3 40 44 22 45 0.14 133 0 0 44 59 3 12 8 45.3 22 106 -10 45 36 13 44 21 50 45 49 41 44 8 19 0.14 134 0 0 44 44 8 12 8 40.3 23 106 -11 45 21 29 44 6 44 45 35 1 43 53 9 0.14 135 0 0 44 28 30 12 8 35.1 24 107 -12 45 6 2 43 50 55 45 19 37 43 37 16 0.14 136 0 0 44 12 8 12 8 29.7 24 108 -12 44 49 51 43 34 22 45 3 31 43 20 39 0.14 137 0 0 43 55 2 12 8 24.1 25 108 -13 44 32 57 43 17 3 44 46 41 43 3 16 0.14 138 0 0 43 37 10 12 8 18.3 26 109 -14 44 15 17 42 58 59 44 29 6 42 45 7 0.14 139 0 0 43 18 32 12 8 12.3 27 110 -14 43 56 52 42 40 8 44 10 45 42 26 12 0.14 140 0 0 42 59 7 12 8 6.0 27 110 -15 43 37 40 42 20 30 43 51 38 42 6 29 0.14 141 0 0 42 38 54 12 7 59.5 28 111 -16 43 17 41 42 0 3 43 31 44 41 45 57 0.14 142 0 0 42 17 53 12 7 52.8 29 111 -16 42 56 54 41 38 47 43 11 2 41 24 36 0.14 143 0 0 41 56 1 12 7 45.8 30 112 -17 42 35 18 41 16 41 42 49 31 41 2 25 0.14 144 0 0 41 33 19 12 7 38.6 31 113 -18 42 12 51 40 53 44 42 27 10 40 39 22 0.14 145 0 0 41 9 46 12 7 31.0 31 113 -18 41 49 33 40 29 55 42 3 58 40 15 27 0.13 146 0 0 40 45 19 12 7 23.3 32 114 -19 41 25 23 40 5 12 41 39 53 39 50 38 0.13 147 0 0 40 19 59 12 7 15.2 33 114 -20 41 0 19 39 39 35 41 14 56 39 24 55 0.13 148 0 0 39 53 44 12 7 6.8 34 115 -21 40 34 21 39 13 3 40 49 4 38 58 17 0.13 149 0 0 39 26 33 12 6 58.2 35 115 -21 40 7 28 38 45 35 40 22 17 38 30 42 0.13 150 0 0 38 58 25 12 6 49.2 36 116 -22 39 39 38 38 17 8 39 54 34 38 2 9 0.13 151 0 0 38 29 19 12 6 39.9 37 117 -23 39 10 50 37 47 44 39 25 53 37 32 37 0.13 152 0 0 37 59 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0 0 29 48 47 12 3 50.6 50 122 -35 30 35 24 29 2 4 30 52 17 28 45 6 0.13 166 0 0 29 2 44 12 3 35.3 52 122 -36 29 49 46 28 15 37 30 6 48 27 58 30 0.13 167 0 0 28 15 25 12 3 19.5 53 122 -37 29 2 52 27 27 53 29 20 3 27 10 37 0.13 168 0 0 27 26 49 12 3 3.2 54 122 -38 28 14 41 26 38 51 28 32 1 26 21 26 0.13 169 0 0 26 36 54 12 2 46.4 55 123 -39 27 25 12 25 48 31 27 42 41 25 30 56 0.13 170 0 0 25 45 41 12 2 29.1 56 123 -40 26 34 24 24 56 51 26 52 2 24 39 7 0.13 171 0 0 24 53 8 12 2 11.3 57 123 -41 25 42 17 24 3 52 26 0 5 23 45 59 0.13 172 0 0 23 59 15 12 1 53.0 58 122 -42 24 48 50 23 9 33 25 6 47 22 51 30 0.13 173 0 0 23 4 2 12 1 34.2 60 122 -43 23 54 3 22 13 54 24 12 10 21 55 41 0.13 174 0 0 22 7 28 12 1 14.8 61 122 -44 22 57 55 21 16 54 23 16 12 20 58 31 0.13 175 0 0 21 9 34 12 0 54.9 62 122 -45 22 0 28 20 18 33 22 18 53 20 0 1 0.13 176 0 0 20 10 19 12 0 34.5 63 121 -46 21 1 39 19 18 52 21 20 15 19 0 10 0.13 177 0 0 19 9 44 12 0 13.5 65 121 -47 20 1 31 18 17 50 20 20 16 17 58 59 0.13 178 0 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Uncertainty in time = +/- 4 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 476-090238 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 07 33.7100 DE: +05 02 24.768 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 07 33.7100 DE: +05 02 24.769 * 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 ["]: 0.183 distance from Earth [AU]: 0.97430 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#127 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): 0.036", 0.005", 80.591° remarks: * orbital elements for (393)Lampetia : Mean anomaly = 348.1438365054 deg Arg. of pericenter = 90.8717102277 deg Long. of node = 212.3932345890 deg Inclination = 14.8773388883 deg Eccentricity = 0.3299586626 Semimajor axis = 2.7795895830 AU Perihelion dist = 1.8624399215 AU Mag: H = 8.42, G = 0.15 Epoch of elements : MJD 60115.49562500 TDT (2023 Jun 20.4956) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1272023Apr24,20.24,2023,6,20,11.892820,-0.126664,-0.084903,-2.005466,2.993972,-0.001424,-0.002358,0.000001,0.000000 -159.6467,5.0761,2.00,23.43,False UCAC4 476-090238,19.12603054,5.0402131,0.00,12.31,0.00,0.0,0,,19.14554974,5.0760890,0.22,0.00,0,0,0 393,Lampetia,10.70,129.2,0.9743,0,0,-1.212,27.01,,8.4,0 0,348.0384,2023,6,20,90.8717,212.3932,14.8773,0.32996,2.77959,1.86244,8.45,5.0,0.15 1.181,0.0363,0.0053,81,0.0332,Known errors,-1.00,-1,-1,-1 20230620_090238,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org