IOTA/IOTA-ES occultation update for (319) Leona / TYC 0726-00981-1 event on 2023 Sep 14, 20:58 UT Visible from China Summary ------- On 2023 Sep 14 UT, the 60.8 km diameter asteroid (319) Leona will occult a 10.9 mag star in the constellation Taurus for observers along a path across China. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.60 mag to 15.49 mag (the magnitude of the asteroid) for at most 2.910 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 Sep 14, 20:53 - 2023 Sep 14, 21:03 * geocentric midpoint of event [JD]: 2460202.37400784 * magnitude of target star: 10.91 * magnitude drop [mag]: 4.60 * estimated maximum duration [s]: 2.910 * Moon: 0 % sunlit, 83° distance * Sun: 85° distance * rough path description: China The occultation path -------------------- * approximate projected width [km]: 66 * 1 sigma uncertainty interval [path widths]: +/- 0.06 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.000) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.000", 90°) * approx speed of asteroid's shadow [km/s]: 20.9125 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0726-00981-1 by 319 Leona on 2023 Sep 14 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 40 0 0 35 6 45 20 53 52.2 1 73 -51 34 48 9 35 25 23 34 45 48 35 27 45 .... 41 0 0 35 21 36 20 53 52.2 1 74 -51 35 3 2 35 40 13 35 0 41 35 42 35 -0.36 42 0 0 35 36 13 20 53 52.4 2 74 -51 35 17 40 35 54 48 35 15 19 35 57 10 -0.38 43 0 0 35 50 33 20 53 52.6 3 75 -51 35 32 2 36 9 7 35 29 41 36 11 29 -0.39 44 0 0 36 4 39 20 53 52.9 4 76 -51 35 46 9 36 23 11 35 43 48 36 25 33 -0.40 45 0 0 36 18 28 20 53 53.3 5 76 -51 36 0 0 36 36 59 35 57 39 36 39 21 -0.40 46 0 0 36 32 2 20 53 53.7 6 77 -50 36 13 35 36 50 32 36 11 14 36 52 53 -0.40 47 0 0 36 45 20 20 53 54.2 6 77 -50 36 26 54 37 3 48 36 24 34 37 6 9 -0.40 48 0 0 36 58 21 20 53 54.8 7 78 -50 36 39 57 37 16 48 36 37 37 37 19 9 -0.40 49 0 0 37 11 7 20 53 55.5 8 79 -50 36 52 44 37 29 33 36 50 24 37 31 53 -0.40 50 0 0 37 23 36 20 53 56.2 9 79 -49 37 5 15 37 42 1 37 2 55 37 44 21 -0.40 51 0 0 37 35 49 20 53 56.9 10 80 -49 37 17 29 37 54 12 37 15 10 37 56 32 -0.40 52 0 0 37 47 46 20 53 57.8 11 81 -49 37 29 27 38 6 7 37 27 8 38 8 27 -0.40 53 0 0 37 59 26 20 53 58.7 11 81 -48 37 41 8 38 17 46 37 38 49 38 20 5 -0.41 54 0 0 38 10 49 20 53 59.6 12 82 -48 37 52 33 38 29 7 37 50 14 38 31 27 -0.41 55 0 0 38 21 55 20 54 0.6 13 82 -48 38 3 41 38 40 13 38 1 22 38 42 32 -0.41 56 0 0 38 32 45 20 54 1.7 14 83 -47 38 14 32 38 51 1 38 12 13 38 53 20 -0.41 57 0 0 38 43 18 20 54 2.9 15 84 -47 38 25 6 39 1 33 38 22 48 39 3 52 -0.41 58 0 0 38 53 35 20 54 4.0 15 84 -46 38 35 24 39 11 48 38 33 5 39 14 7 -0.41 59 0 0 39 3 34 20 54 5.3 16 85 -46 38 45 24 39 21 46 38 43 6 39 24 4 -0.41 60 0 0 39 13 16 20 54 6.6 17 86 -46 38 55 8 39 31 27 38 52 50 39 33 45 -0.41 61 0 0 39 22 41 20 54 8.0 18 86 -45 39 4 35 39 40 51 39 2 17 39 43 9 -0.41 62 0 0 39 31 50 20 54 9.4 19 87 -45 39 13 44 39 49 58 39 11 26 39 52 16 -0.41 63 0 0 39 40 41 20 54 10.9 19 88 -44 39 22 36 39 58 48 39 20 19 40 1 6 -0.41 64 0 0 39 49 15 20 54 12.4 20 88 -44 39 31 12 40 7 21 39 28 54 40 9 39 -0.41 65 0 0 39 57 32 20 54 14.0 21 89 -43 39 39 30 40 15 37 39 37 13 40 17 54 -0.41 66 0 0 40 5 32 20 54 15.6 22 90 -43 39 47 31 40 23 35 39 45 14 40 25 53 -0.41 67 0 0 40 13 15 20 54 17.3 22 90 -42 39 55 15 40 31 17 39 52 58 40 33 34 -0.41 68 0 0 40 20 40 20 54 19.1 23 91 -42 40 2 41 40 38 41 40 0 25 40 40 59 -0.41 69 0 0 40 27 49 20 54 20.8 24 92 -41 40 9 51 40 45 49 40 7 34 40 48 6 -0.41 70 0 0 40 34 40 20 54 22.7 25 93 -41 40 16 43 40 52 39 40 14 26 40 54 56 -0.41 71 0 0 40 41 14 20 54 24.6 25 93 -40 40 23 18 40 59 12 40 21 1 41 1 29 -0.41 72 0 0 40 47 30 20 54 26.5 26 94 -40 40 29 35 41 5 27 40 27 19 41 7 44 -0.41 73 0 0 40 53 29 20 54 28.5 27 95 -39 40 35 35 41 11 26 40 33 19 41 13 42 -0.41 74 0 0 40 59 12 20 54 30.5 28 95 -39 40 41 18 41 17 7 40 39 2 41 19 23 -0.41 75 0 0 41 4 36 20 54 32.6 28 96 -38 40 46 44 41 22 31 40 44 28 41 24 47 -0.41 76 0 0 41 9 44 20 54 34.7 29 97 -38 40 51 52 41 27 38 40 49 37 41 29 54 -0.41 77 0 0 41 14 34 20 54 36.9 30 98 -37 40 56 43 41 32 27 40 54 28 41 34 43 -0.41 78 0 0 41 19 7 20 54 39.1 31 99 -36 41 1 17 41 36 59 40 59 2 41 39 16 -0.41 79 0 0 41 23 23 20 54 41.4 31 99 -36 41 5 34 41 41 14 41 3 18 41 43 31 -0.41 80 0 0 41 27 21 20 54 43.7 32 100 -35 41 9 33 41 45 12 41 7 17 41 47 28 -0.41 81 0 0 41 31 3 20 54 46.1 33 101 -35 41 13 14 41 48 53 41 10 59 41 51 9 -0.41 82 0 0 41 34 26 20 54 48.5 34 102 -34 41 16 39 41 52 16 41 14 24 41 54 32 -0.41 83 0 0 41 37 33 20 54 50.9 34 102 -34 41 19 46 41 55 22 41 17 31 41 57 38 -0.41 84 0 0 41 40 22 20 54 53.4 35 103 -33 41 22 36 41 58 11 41 20 20 42 0 27 -0.41 85 0 0 41 42 54 20 54 55.9 36 104 -32 41 25 8 42 0 42 41 22 53 42 2 58 -0.41 86 0 0 41 45 8 20 54 58.5 37 105 -32 41 27 23 42 2 56 41 25 8 42 5 12 -0.41 87 0 0 41 47 6 20 55 1.1 37 106 -31 41 29 20 42 4 53 41 27 5 42 7 9 -0.41 88 0 0 41 48 46 20 55 3.8 38 107 -31 41 31 0 42 6 33 41 28 45 42 8 48 -0.41 89 0 0 41 50 8 20 55 6.5 39 108 -30 41 32 23 42 7 55 41 30 8 42 10 11 -0.41 90 0 0 41 51 13 20 55 9.2 39 108 -29 41 33 29 42 9 0 41 31 14 42 11 16 -0.41 91 0 0 41 52 1 20 55 12.0 40 109 -29 41 34 17 42 9 48 41 32 2 42 12 3 -0.41 92 0 0 41 52 32 20 55 14.8 41 110 -28 41 34 47 42 10 18 41 32 32 42 12 34 -0.41 93 0 0 41 52 45 20 55 17.6 42 111 -27 41 35 0 42 10 31 41 32 45 42 12 47 -0.41 94 0 0 41 52 40 20 55 20.5 42 112 -27 41 34 56 42 10 27 41 32 41 42 12 42 -0.41 95 0 0 41 52 19 20 55 23.5 43 113 -26 41 34 34 42 10 5 41 32 19 42 12 21 -0.41 96 0 0 41 51 40 20 55 26.5 44 114 -26 41 33 55 42 9 26 41 31 40 42 11 42 -0.41 97 0 0 41 50 43 20 55 29.5 44 115 -25 41 32 59 42 8 30 41 30 44 42 10 45 -0.41 98 0 0 41 49 29 20 55 32.5 45 116 -24 41 31 45 42 7 16 41 29 30 42 9 32 -0.41 99 0 0 41 47 58 20 55 35.6 46 117 -24 41 30 13 42 5 45 41 27 58 42 8 1 -0.41 100 0 0 41 46 9 20 55 38.8 46 118 -23 41 28 24 42 3 57 41 26 9 42 6 12 -0.41 101 0 0 41 44 3 20 55 41.9 47 119 -22 41 26 18 42 1 51 41 24 3 42 4 6 -0.41 102 0 0 41 41 39 20 55 45.2 48 120 -22 41 23 54 41 59 27 41 21 38 42 1 43 -0.41 103 0 0 41 38 58 20 55 48.4 48 121 -21 41 21 12 41 56 47 41 18 57 41 59 2 -0.41 104 0 0 41 36 0 20 55 51.7 49 122 -20 41 18 13 41 53 49 41 15 58 41 56 4 -0.41 105 0 0 41 32 44 20 55 55.0 50 123 -20 41 14 56 41 50 33 41 12 41 41 52 49 -0.41 106 0 0 41 29 10 20 55 58.4 50 124 -19 41 11 22 41 47 0 41 9 7 41 49 16 -0.41 107 0 0 41 25 19 20 56 1.8 51 125 -18 41 7 30 41 43 9 41 5 15 41 45 25 -0.41 108 0 0 41 21 10 20 56 5.2 52 127 -18 41 3 21 41 39 1 41 1 6 41 41 17 -0.41 109 0 0 41 16 44 20 56 8.7 52 128 -17 40 58 54 41 34 35 40 56 39 41 36 52 -0.41 110 0 0 41 12 0 20 56 12.2 53 129 -16 40 54 10 41 29 52 40 51 54 41 32 9 -0.41 111 0 0 41 6 58 20 56 15.8 54 130 -15 40 49 7 41 24 52 40 46 52 41 27 8 -0.41 112 0 0 41 1 39 20 56 19.4 54 131 -15 40 43 48 41 19 33 40 41 32 41 21 50 -0.41 113 0 0 40 56 3 20 56 23.0 55 133 -14 40 38 10 41 13 58 40 35 54 41 16 14 -0.41 114 0 0 40 50 8 20 56 26.7 56 134 -13 40 32 15 41 8 4 40 29 59 41 10 21 -0.41 115 0 0 40 43 57 20 56 30.4 56 135 -13 40 26 2 41 1 53 40 23 46 41 4 10 -0.41 116 0 0 40 37 27 20 56 34.1 57 137 -12 40 19 32 40 55 25 40 17 16 40 57 42 -0.41 117 0 0 40 30 40 20 56 37.9 57 138 -11 40 12 44 40 48 38 40 10 27 40 50 55 -0.41 118 0 0 40 23 35 20 56 41.7 58 140 -11 40 5 38 40 41 35 40 3 21 40 43 52 -0.41 119 0 0 40 16 13 20 56 45.5 59 141 -10 39 58 14 40 34 13 39 55 58 40 36 31 -0.41 120 0 0 40 8 33 20 56 49.4 59 143 -9 39 50 33 40 26 34 39 48 16 40 28 52 -0.41 121 0 0 40 0 35 20 56 53.3 60 144 -8 39 42 34 40 18 38 39 40 17 40 20 55 -0.41 122 0 0 39 52 19 20 56 57.3 60 146 -8 39 34 18 40 10 23 39 32 1 40 12 41 -0.41 123 0 0 39 43 46 20 57 1.3 61 148 -7 39 25 44 40 1 51 39 23 26 40 4 9 -0.41 124 0 0 39 34 56 20 57 5.3 61 149 -6 39 16 52 39 53 2 39 14 34 39 55 20 -0.41 125 0 0 39 25 47 20 57 9.3 62 151 -5 39 7 42 39 43 55 39 5 24 39 46 13 -0.41 126 0 0 39 16 21 20 57 13.4 62 153 -5 38 58 15 39 34 30 38 55 57 39 36 48 -0.41 127 0 0 39 6 38 20 57 17.5 63 155 -4 38 48 30 39 24 48 38 46 12 39 27 6 -0.41 128 0 0 38 56 36 20 57 21.7 63 157 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58 44 15 41 25 -0.43 -154 0 0 14 59 31 21 2 49.2 24 279 69 14 40 37 15 18 27 14 38 13 15 20 52 -0.43 -153 0 0 14 39 8 21 2 51.5 22 279 70 14 20 16 14 58 4 14 17 52 15 0 28 -0.43 -152 0 0 14 18 56 21 2 53.7 21 280 71 14 0 4 14 37 50 13 57 41 14 40 14 -0.43 -151 0 0 13 58 54 21 2 55.9 20 280 72 13 40 4 14 17 47 13 37 41 14 20 11 -0.43 -150 0 0 13 39 3 21 2 57.9 19 280 73 13 20 14 13 57 55 13 17 51 14 0 19 -0.43 -149 0 0 13 19 24 21 2 59.8 18 280 74 13 0 36 13 38 14 12 58 13 13 40 38 -0.43 -148 0 0 12 59 57 21 3 1.7 17 281 75 12 41 10 13 18 46 12 38 47 13 21 9 -0.43 -147 0 0 12 40 42 21 3 3.4 16 281 76 12 21 57 12 59 29 12 19 34 13 1 53 -0.43 -146 0 0 12 21 39 21 3 5.0 15 281 77 12 2 56 12 40 26 12 0 33 12 42 49 -0.43 -145 0 0 12 2 51 21 3 6.5 14 282 78 11 44 8 12 21 35 11 41 46 12 23 58 -0.44 -144 0 0 11 44 15 21 3 7.9 13 282 79 11 25 34 12 2 59 11 23 12 12 5 22 -0.44 -143 0 0 11 25 54 21 3 9.3 12 282 80 11 7 14 11 44 36 11 4 53 11 46 59 -0.44 -142 0 0 11 7 47 21 3 10.5 11 282 81 10 49 9 11 26 28 10 46 47 11 28 50 -0.44 -141 0 0 10 49 55 21 3 11.6 10 282 81 10 31 18 11 8 34 10 28 57 11 10 57 -0.45 -140 0 0 10 32 18 21 3 12.6 9 283 82 10 13 43 10 50 56 10 11 21 10 53 18 -0.45 -139 0 0 10 14 57 21 3 13.5 8 283 83 9 56 23 10 33 33 9 54 2 10 35 55 -0.45 -138 0 0 9 57 51 21 3 14.2 7 283 83 9 39 18 10 16 26 9 36 57 10 18 48 -0.46 -137 0 0 9 41 1 21 3 14.9 6 283 84 9 22 30 9 59 35 9 20 10 10 1 57 -0.47 -136 0 0 9 24 28 21 3 15.5 5 283 84 9 5 59 9 43 1 9 3 38 9 45 22 -0.48 -135 0 0 9 8 12 21 3 16.0 4 283 84 8 49 44 9 26 43 8 47 24 9 29 4 -0.49 -134 0 0 8 52 13 21 3 16.3 3 284 84 8 33 46 9 10 42 8 31 26 9 13 3 -0.52 -133 0 0 8 36 31 21 3 16.6 2 284 83 8 18 6 8 54 59 8 15 46 8 57 20 -0.57 -132 0 0 8 21 7 21 3 16.7 1 284 83 8 2 43 8 39 34 8 0 23 8 41 54 -0.73 -131 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 8 24 26 .. .. .. 8 26 46 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: TYC 0726-00981-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 44 04.7392 DE: +13 53 36.689 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 44 04.7393 DE: +13 53 36.689 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (319) Leona asteroid class: approx. diameter [km]: 61 approx. diameter ["]: 0.033 distance from Earth [AU]: 2.57490 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#69 date of fit: 2023 Aug 23 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): 0.009", 0.000", 90.205° remarks: * orbital elements for (319)Leona : Mean anomaly = 7.8554045389 deg Arg. of pericenter = 227.0489718679 deg Long. of node = 184.8619549313 deg Inclination = 10.5635752195 deg Eccentricity = 0.2151478959 Semimajor axis = 3.4119343258 AU Perihelion dist = 2.6778638347 AU Mag: H = 10.23, G = 0.15 Epoch of elements : MJD 60201.87409722 TDT (2023 Sep 14.8741) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#692023Aug23,2.91,2023,9,14,20.976188,0.090044,0.365869,11.461149,-2.822499,-0.005650,-0.000222,0.000000,0.000000 138.1340,13.9056,-135.76,3.26,False TYC 0726-00981-1,5.73464975,13.8935246,0.00,10.91,0.00,0.0,0,,5.75690167,13.9056094,4.60,0.00,0,0,0 319,Leona,15.49,60.800,2.5749,0,0,2.688,-9.64,,3.0,0 0,7.7187,2023,9,14,227.0490,184.8620,10.5636,0.21515,3.41193,2.67786,10.23,5.0,0.15 1.063,0.0087,0.0003,90,0.0087,Known errors,-1.00,0,-1,-1 20230914_0981-1,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org