IOTA/IOTA-ES occultation update for (125) Liberatrix / TYC 1315-00303-1 event on 2023 Dec 19, 12:14 UT Visible from SE Australia Summary ------- On 2023 Dec 19 UT, the 44.6 km diameter asteroid (125) Liberatrix will occult a 10.9 mag star in the constellation Orion for observers along a path across SE Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.43 mag to 13.18 mag (the magnitude of the asteroid) for at most 3.320 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 Dec 19, 12:09 - 2023 Dec 19, 12:20 * geocentric midpoint of event [JD]: 2460298.01023438 * magnitude of target star: 10.87 * magnitude drop [mag]: 2.43 * estimated maximum duration [s]: 3.320 * Moon: 48 % sunlit, 100° distance * Sun: 170° distance * rough path description: SE Australia The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.001", 91°) * approx speed of asteroid's shadow [km/s]: 13.4405 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1315-00303-1 by 125 Liberatrix on 2023 Dec 19 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 108 0 0 -41 46 32 12 20 14.8 0 67 -1 -41 27 42 -42 5 28 -41 25 57 -42 7 15 .... 109 0 0 -41 27 59 12 20 14.7 1 67 -2 -41 9 11 -41 46 54 -41 7 26 -41 48 40 0.42 110 0 0 -41 9 31 12 20 14.5 2 66 -2 -40 50 44 -41 28 24 -40 48 59 -41 30 10 0.70 111 0 0 -40 51 8 12 20 14.1 3 65 -3 -40 32 23 -41 10 0 -40 30 39 -41 11 46 0.81 112 0 0 -40 32 52 12 20 13.6 3 65 -4 -40 14 8 -40 51 42 -40 12 24 -40 53 28 0.86 113 0 0 -40 14 42 12 20 13.0 4 64 -5 -39 56 0 -40 33 30 -39 54 15 -40 35 16 0.90 114 0 0 -39 56 38 12 20 12.2 5 64 -6 -39 37 58 -40 15 25 -39 36 14 -40 17 11 0.92 115 0 0 -39 38 43 12 20 11.3 6 63 -6 -39 20 4 -39 57 28 -39 18 20 -39 59 13 0.94 116 0 0 -39 20 55 12 20 10.2 7 62 -7 -39 2 18 -39 39 38 -39 0 34 -39 41 23 0.95 117 0 0 -39 3 15 12 20 9.0 8 62 -8 -38 44 40 -39 21 57 -38 42 57 -39 23 42 0.96 118 0 0 -38 45 45 12 20 7.7 8 61 -9 -38 27 12 -39 4 25 -38 25 28 -39 6 9 0.97 119 0 0 -38 28 24 12 20 6.2 9 60 -9 -38 9 52 -38 47 2 -38 8 9 -38 48 46 0.98 120 0 0 -38 11 12 12 20 4.5 10 60 -10 -37 52 42 -38 29 48 -37 50 59 -38 31 33 0.98 121 0 0 -37 54 11 12 20 2.8 11 59 -11 -37 35 43 -38 12 45 -37 34 0 -38 14 29 0.99 122 0 0 -37 37 20 12 20 0.9 12 58 -12 -37 18 54 -37 55 52 -37 17 11 -37 57 37 0.99 123 0 0 -37 20 40 12 19 58.8 12 58 -13 -37 2 16 -37 39 11 -37 0 34 -37 40 55 0.99 124 0 0 -37 4 12 12 19 56.6 13 57 -13 -36 45 50 -37 22 41 -36 44 8 -37 24 25 1.00 125 0 0 -36 47 56 12 19 54.3 14 56 -14 -36 29 36 -37 6 23 -36 27 53 -37 8 6 1.00 126 0 0 -36 31 52 12 19 51.8 15 56 -15 -36 13 34 -36 50 17 -36 11 51 -36 52 0 1.00 127 0 0 -36 16 1 12 19 49.2 16 55 -16 -35 57 44 -36 34 23 -35 56 2 -36 36 7 1.00 128 0 0 -36 0 22 12 19 46.4 16 55 -16 -35 42 8 -36 18 43 -35 40 26 -36 20 26 1.00 129 0 0 -35 44 57 12 19 43.5 17 54 -17 -35 26 45 -36 3 16 -35 25 3 -36 4 59 1.01 130 0 0 -35 29 46 12 19 40.5 18 53 -18 -35 11 36 -35 48 3 -35 9 54 -35 49 46 1.01 131 0 0 -35 14 49 12 19 37.4 19 53 -19 -34 56 40 -35 33 5 -34 54 59 -35 34 47 1.01 132 0 0 -35 0 7 12 19 34.1 20 52 -19 -34 42 0 -35 18 20 -34 40 19 -35 20 3 1.01 133 0 0 -34 45 39 12 19 30.6 20 51 -20 -34 27 34 -35 3 51 -34 25 53 -35 5 33 1.01 134 0 0 -34 31 27 12 19 27.1 21 51 -21 -34 13 23 -34 49 36 -34 11 42 -34 51 18 1.01 135 0 0 -34 17 30 12 19 23.4 22 50 -21 -33 59 28 -34 35 37 -33 57 47 -34 37 19 1.01 136 0 0 -34 3 48 12 19 19.6 23 49 -22 -33 45 49 -34 21 54 -33 44 8 -34 23 36 1.01 137 0 0 -33 50 23 12 19 15.6 23 48 -23 -33 32 25 -34 8 27 -33 30 45 -34 10 9 1.02 138 0 0 -33 37 14 12 19 11.6 24 48 -23 -33 19 18 -33 55 17 -33 17 38 -33 56 58 1.02 139 0 0 -33 24 22 12 19 7.4 25 47 -24 -33 6 28 -33 42 23 -33 4 48 -33 44 4 1.02 140 0 0 -33 11 47 12 19 3.1 26 46 -25 -32 53 54 -33 29 46 -32 52 15 -33 31 27 1.02 141 0 0 -32 59 29 12 18 58.6 26 46 -25 -32 41 38 -33 17 26 -32 39 58 -33 19 7 1.02 142 0 0 -32 47 29 12 18 54.1 27 45 -26 -32 29 39 -33 5 24 -32 28 0 -33 7 5 1.02 143 0 0 -32 35 46 12 18 49.4 28 44 -27 -32 17 58 -32 53 40 -32 16 19 -32 55 20 1.02 144 0 0 -32 24 21 12 18 44.7 29 43 -27 -32 6 35 -32 42 13 -32 4 55 -32 43 53 1.02 145 0 0 -32 13 14 12 18 39.8 29 42 -28 -31 55 29 -32 31 4 -31 53 50 -32 32 45 1.02 146 0 0 -32 2 26 12 18 34.8 30 42 -28 -31 44 42 -32 20 14 -31 43 3 -32 21 54 1.02 147 0 0 -31 51 56 12 18 29.7 31 41 -29 -31 34 14 -32 9 43 -31 32 35 -32 11 23 1.02 148 0 0 -31 41 44 12 18 24.5 31 40 -29 -31 24 4 -31 59 30 -31 22 26 -32 1 10 1.02 149 0 0 -31 31 52 12 18 19.2 32 39 -30 -31 14 13 -31 49 37 -31 12 35 -31 51 16 1.02 150 0 0 -31 22 19 12 18 13.8 33 38 -30 -31 4 42 -31 40 2 -31 3 3 -31 41 42 1.02 151 0 0 -31 13 5 12 18 8.3 33 37 -31 -30 55 29 -31 30 47 -30 53 51 -31 32 26 1.02 152 0 0 -31 4 11 12 18 2.7 34 37 -31 -30 46 36 -31 21 52 -30 44 58 -31 23 31 1.02 153 0 0 -30 55 37 12 17 57.1 35 36 -32 -30 38 3 -31 13 16 -30 36 25 -31 14 55 1.02 154 0 0 -30 47 22 12 17 51.3 35 35 -32 -30 29 50 -31 5 0 -30 28 12 -31 6 39 1.02 155 0 0 -30 39 27 12 17 45.5 36 34 -33 -30 21 56 -30 57 4 -30 20 18 -30 58 43 1.02 156 0 0 -30 31 52 12 17 39.5 36 33 -33 -30 14 22 -30 49 28 -30 12 45 -30 51 7 1.02 157 0 0 -30 24 38 12 17 33.5 37 32 -34 -30 7 9 -30 42 12 -30 5 31 -30 43 51 1.02 158 0 0 -30 17 43 12 17 27.5 37 31 -34 -30 0 15 -30 35 17 -29 58 38 -30 36 55 1.02 159 0 0 -30 11 9 12 17 21.3 38 30 -34 -29 53 42 -30 28 42 -29 52 5 -30 30 20 1.02 160 0 0 -30 4 56 12 17 15.1 38 29 -35 -29 47 30 -30 22 28 -29 45 53 -30 24 6 1.02 161 0 0 -29 59 3 12 17 8.8 39 28 -35 -29 41 38 -30 16 34 -29 40 1 -30 18 12 1.02 162 0 0 -29 53 31 12 17 2.4 39 27 -35 -29 36 7 -30 11 1 -29 34 30 -30 12 39 1.02 163 0 0 -29 48 20 12 16 56.0 40 26 -36 -29 30 57 -30 5 49 -29 29 20 -30 7 28 1.02 164 0 0 -29 43 30 12 16 49.5 40 25 -36 -29 26 7 -30 0 58 -29 24 30 -30 2 37 1.02 165 0 0 -29 39 1 12 16 43.0 41 23 -36 -29 21 39 -29 56 29 -29 20 2 -29 58 7 1.02 166 0 0 -29 34 53 12 16 36.4 41 22 -36 -29 17 31 -29 52 20 -29 15 54 -29 53 58 1.02 167 0 0 -29 31 6 12 16 29.8 41 21 -37 -29 13 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28 29 -42 48 48 -43 30 16 1.09 -108 0 0 -43 28 12 12 9 15.9 5 298 6 -43 9 17 -43 47 15 -43 7 31 -43 49 2 1.09 -107 0 0 -43 46 59 12 9 15.2 4 297 7 -43 28 2 -44 6 2 -43 26 16 -44 7 49 1.10 -106 0 0 -44 5 46 12 9 14.7 3 296 7 -43 46 48 -44 24 51 -43 45 3 -44 26 38 1.12 -105 0 0 -44 24 34 12 9 14.3 2 296 8 -44 5 36 -44 43 40 -44 3 50 -44 45 28 1.14 -104 0 0 -44 43 23 12 9 14.0 1 295 9 -44 24 23 -45 2 30 -44 22 37 -45 4 17 1.20 -103 0 0 -45 2 11 12 9 13.9 1 294 10 -44 43 10 -45 21 19 -44 41 24 -45 23 6 1.39 0 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -45 0 11 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Nov 13.9 Data for the target star ------------------------ * name: TYC 1315-00303-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 19 59.2721 DE: +16 35 12.648 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 19 59.2721 DE: +16 35 12.648 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (125) Liberatrix asteroid class: approx. diameter [km]: 45 approx. diameter ["]: 0.031 distance from Earth [AU]: 1.98930 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#102 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): 0.012", 0.001", 91.315° remarks: * orbital elements for (125)Liberatrix : Mean anomaly = 172.2251722756 deg Arg. of pericenter = 109.8696917947 deg Long. of node = 168.9447455872 deg Inclination = 4.6651005814 deg Eccentricity = 0.0809670153 Semimajor axis = 2.7422232142 AU Perihelion dist = 2.5201935852 AU Mag: H = 8.99, G = 0.33 Epoch of elements : MJD 60297.51013889 TDT (2023 Dec 19.5101) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1022023Oct09,3.32,2023,12,19,12.245625,-0.023398,-0.715095,-7.582157,0.247764,-0.000755,0.000731,0.000001,0.000000 -176.1771,16.5770,-4.44,-23.41,False TYC 1315-00303-1,6.33313113,16.5868468,0.00,10.87,0.00,0.0,0,,6.35652147,16.5769858,2.44,0.00,0,0,0 125,Liberatrix,13.18,44.600,1.9893,0,0,-2.331,1.10,,2.6,0 0,172.1144,2023,12,19,109.8697,168.9447,4.6651,0.08097,2.74222,2.52019,9.00,5.0,0.15 1.047,0.0123,0.0014,91,0.0124,Known errors,-1.00,0,-1,-1 20231219_0303-1,60261.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Nov 13, 20:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org