IOTA/IOTA-ES occultation update for (104) Klymene / G164444.5-230502 event on 2023 Jan 30, 16:54 UT Visible from New Zealand, SE Australia Summary ------- On 2023 Jan 30 UT, the 133.9 km diameter asteroid (104) Klymene will occult a 7.6 mag star in the constellation Ophiuchus for observers along a path across New Zealand, SE Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.53 mag to 15.14 mag (the magnitude of the asteroid) for at most 4.430 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 Jan 30, 16:51 - 2023 Jan 30, 16:57 * geocentric midpoint of event [JD]: 2459975.20469154 * magnitude of target star: 7.61 * magnitude drop [mag]: 7.53 * estimated maximum duration [s]: 4.430 * Moon: 71 % sunlit, 172° distance * Sun: 57° distance * rough path description: New Zealand, SE Australia The occultation path -------------------- * approximate projected width [km]: 163 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 99°) * approx speed of asteroid's shadow [km/s]: 30.2524 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G164444.5-230502 by 104 Klymene on 2023 Jan 30 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 128 0 0 .. .. .... .. .. .. .. .. .. -24 31 20 .. .. .. -24 34 39 .. .. .. .... 129 0 0 -24 8 14 16 51 52.5 1 115 -45 -24 57 49 -23 19 11 -25 1 9 -23 15 56 .... 130 0 0 -24 34 52 16 51 52.6 2 115 -44 -25 24 35 -23 45 41 -25 27 55 -23 42 26 0.61 131 0 0 -25 1 45 16 51 52.8 3 114 -43 -25 51 36 -24 12 27 -25 54 56 -24 9 11 0.65 132 0 0 -25 28 53 16 51 53.1 4 114 -42 -26 18 52 -24 39 28 -26 22 13 -24 36 12 0.66 133 0 0 -25 56 15 16 51 53.4 5 113 -41 -26 46 22 -25 6 43 -26 49 43 -25 3 27 0.67 134 0 0 -26 23 51 16 51 53.8 6 113 -40 -27 14 5 -25 34 12 -27 17 27 -25 30 55 0.68 135 0 0 -26 51 40 16 51 54.4 7 112 -40 -27 42 0 -26 1 53 -27 45 23 -25 58 36 0.68 136 0 0 -27 19 40 16 51 54.9 8 112 -39 -28 10 7 -26 29 47 -28 13 30 -26 26 28 0.68 137 0 0 -27 47 50 16 51 55.6 9 111 -38 -28 38 25 -26 57 51 -28 41 48 -26 54 32 0.69 138 0 0 -28 16 11 16 51 56.4 10 111 -37 -29 6 53 -27 26 5 -29 10 17 -27 22 46 0.69 139 0 0 -28 44 42 16 51 57.2 11 110 -36 -29 35 29 -27 54 29 -29 38 54 -27 51 10 0.69 140 0 0 -29 13 20 16 51 58.1 12 110 -35 -30 4 14 -28 23 2 -30 7 39 -28 19 42 0.69 141 0 0 -29 42 6 16 51 59.0 13 109 -34 -30 33 6 -28 51 42 -30 36 31 -28 48 21 0.69 142 0 0 -30 10 59 16 52 0.1 14 109 -33 -31 2 5 -29 20 28 -31 5 30 -29 17 8 0.69 143 0 0 -30 39 57 16 52 1.2 15 108 -33 -31 31 8 -29 49 21 -31 34 34 -29 46 0 0.70 144 0 0 -31 9 0 16 52 2.4 16 108 -32 -32 0 17 -30 18 19 -32 3 43 -30 14 57 0.70 145 0 0 -31 38 6 16 52 3.6 17 107 -31 -32 29 29 -30 47 20 -32 32 55 -30 43 59 0.70 146 0 0 -32 7 16 16 52 4.9 18 107 -30 -32 58 43 -31 16 25 -33 2 10 -31 13 3 0.70 147 0 0 -32 36 27 16 52 6.3 19 106 -29 -33 27 59 -31 45 32 -33 31 26 -31 42 10 0.70 148 0 0 -33 5 40 16 52 7.8 20 105 -28 -33 57 16 -32 14 41 -34 0 44 -32 11 18 0.70 149 0 0 -33 34 52 16 52 9.3 21 105 -27 -34 26 33 -32 43 49 -34 30 0 -32 40 27 0.70 150 0 0 -34 4 4 16 52 10.8 22 104 -26 -34 55 48 -33 12 58 -34 59 16 -33 9 35 0.70 151 0 0 -34 33 15 16 52 12.4 22 103 -25 -35 25 2 -33 42 5 -35 28 30 -33 38 41 0.70 152 0 0 -35 2 22 16 52 14.1 23 103 -24 -35 54 13 -34 11 9 -35 57 41 -34 7 46 0.70 153 0 0 -35 31 26 16 52 15.9 24 102 -23 -36 23 19 -34 40 11 -36 26 48 -34 36 47 0.70 154 0 0 -36 0 26 16 52 17.7 25 101 -22 -36 52 21 -35 9 8 -36 55 50 -35 5 44 0.70 155 0 0 -36 29 20 16 52 19.5 26 101 -21 -37 21 17 -35 38 0 -37 24 46 -35 34 36 0.70 156 0 0 -36 58 8 16 52 21.4 27 100 -21 -37 50 7 -36 6 47 -37 53 36 -36 3 23 0.70 157 0 0 -37 26 49 16 52 23.3 28 99 -20 -38 18 49 -36 35 26 -38 22 18 -36 32 2 0.70 158 0 0 -37 55 22 16 52 25.3 29 98 -19 -38 47 23 -37 3 58 -38 50 52 -37 0 34 0.70 159 0 0 -38 23 46 16 52 27.3 30 97 -18 -39 15 48 -37 32 22 -39 19 17 -37 28 58 0.70 160 0 0 -38 52 1 16 52 29.4 30 97 -17 -39 44 3 -38 0 36 -39 47 32 -37 57 12 0.70 161 0 0 -39 20 5 16 52 31.5 31 96 -16 -40 12 7 -38 28 41 -40 15 37 -38 25 17 0.70 162 0 0 -39 47 58 16 52 33.6 32 95 -15 -40 40 0 -38 56 35 -40 43 29 -38 53 11 0.70 163 0 0 -40 15 40 16 52 35.8 33 94 -14 -41 7 41 -39 24 17 -41 11 10 -39 20 53 0.70 164 0 0 -40 43 9 16 52 38.0 34 93 -13 -41 35 8 -39 51 47 -41 38 37 -39 48 23 0.70 165 0 0 -41 10 24 16 52 40.2 34 92 -12 -42 2 22 -40 19 4 -42 5 51 -40 15 40 0.70 166 0 0 -41 37 26 16 52 42.5 35 91 -12 -42 29 22 -40 46 7 -42 32 51 -40 42 43 0.70 167 0 0 -42 4 13 16 52 44.8 36 90 -11 -42 56 7 -41 12 56 -42 59 35 -41 9 33 0.70 168 0 0 -42 30 45 16 52 47.1 37 89 -10 -43 22 36 -41 39 31 -43 26 4 -41 36 7 0.70 169 0 0 -42 57 1 16 52 49.4 37 88 -9 -43 48 49 -42 5 49 -43 52 17 -42 2 26 0.70 170 0 0 -43 23 0 16 52 51.8 38 87 -8 -44 14 45 -42 31 52 -44 18 13 -42 28 29 0.70 171 0 0 -43 48 43 16 52 54.2 39 86 -7 -44 40 24 -42 57 38 -44 43 52 -42 54 15 0.70 172 0 0 -44 14 8 16 52 56.6 39 85 -6 -45 5 45 -43 23 7 -45 9 13 -43 19 45 0.70 173 0 0 -44 39 15 16 52 59.0 40 84 -6 -45 30 48 -43 48 19 -45 34 16 -43 44 56 0.70 174 0 0 -45 4 4 16 53 1.4 41 83 -5 -45 55 33 -44 13 12 -45 59 0 -44 9 50 0.70 175 0 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28.8 15 252 51 -48 22 18 -46 41 6 -48 25 42 -46 37 47 0.73 - 39 0 0 -47 8 47 16 57 29.7 14 251 50 -47 59 47 -46 18 24 -48 3 12 -46 15 3 0.74 - 38 0 0 -46 45 50 16 57 30.6 14 251 50 -47 36 55 -45 55 21 -47 40 21 -45 52 1 0.74 - 37 0 0 -46 22 33 16 57 31.4 13 250 50 -47 13 44 -45 31 59 -47 17 10 -45 28 38 0.74 - 36 0 0 -45 58 57 16 57 32.2 12 249 49 -46 50 13 -45 8 17 -46 53 39 -45 4 56 0.74 - 35 0 0 -45 35 1 16 57 32.9 11 248 49 -46 26 22 -44 44 17 -46 29 49 -44 40 56 0.75 - 34 0 0 -45 10 47 16 57 33.6 10 248 49 -46 2 12 -44 19 58 -46 5 39 -44 16 36 0.75 - 33 0 0 -44 46 14 16 57 34.2 10 247 48 -45 37 44 -43 55 21 -45 41 11 -43 51 59 0.75 - 32 0 0 -44 21 23 16 57 34.8 9 246 48 -45 12 57 -43 30 26 -45 16 24 -43 27 4 0.76 - 31 0 0 -43 56 15 16 57 35.4 8 246 47 -44 47 52 -43 5 14 -44 51 20 -43 1 52 0.77 - 30 0 0 -43 30 49 16 57 35.9 7 245 47 -44 22 30 -42 39 45 -44 25 58 -42 36 22 0.77 - 29 0 0 -43 5 7 16 57 36.3 6 244 46 -43 56 51 -42 14 0 -44 0 19 -42 10 37 0.78 - 28 0 0 -42 39 9 16 57 36.7 5 243 46 -43 30 56 -41 47 59 -43 34 24 -41 44 36 0.80 - 27 0 0 -42 12 55 16 57 37.1 5 243 45 -43 4 44 -41 21 43 -43 8 13 -41 18 20 0.82 - 26 0 0 -41 46 26 16 57 37.4 4 242 45 -42 38 18 -40 55 12 -42 41 46 -40 51 49 0.84 - 25 0 0 -41 19 43 16 57 37.6 3 241 44 -42 11 36 -40 28 27 -42 15 5 -40 25 4 0.89 - 24 0 0 -40 52 46 16 57 37.8 2 241 43 -41 44 41 -40 1 29 -41 48 10 -39 58 6 0.97 - 23 0 0 -40 25 36 16 57 37.9 1 240 43 -41 17 32 -39 34 18 -41 21 1 -39 30 55 1.19 - 22 0 0 -39 58 14 16 57 37.9 0 239 42 -40 50 11 .. .. .. -40 53 40 .. .. .. 3.52 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: G164444.5-230502 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 44 44.5448 DE: -23 05 00.717 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 44 44.5449 DE: -23 05 00.717 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 7.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (104) Klymene asteroid class: approx. diameter [km]: 134 approx. diameter ["]: 0.045 distance from Earth [AU]: 4.06800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#117 date of fit: 2022 Nov 26 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): 0.013", 0.001", 99.295° remarks: * orbital elements for (104)Klymene : Mean anomaly = 161.2489978152 deg Arg. of pericenter = 31.6525892339 deg Long. of node = 41.6595817471 deg Inclination = 2.7899041833 deg Eccentricity = 0.1617520659 Semimajor axis = 3.1458163608 AU Perihelion dist = 2.6369740654 AU Mag: H = 8.50, G = 0.15 Epoch of elements : MJD 59974.70465278 TDT (2023 Jan 30.7047) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1172022Nov26,4.43,2023,1,30,16.912597,-0.089717,-0.564520,16.862198,-2.689347,-0.005100,0.000604,-0.000001,0.000000 -131.8294,-23.1257,-70.37,-17.60,False G164444.5-230502,16.74570686,-23.0835325,0.00,7.61,0.00,0.0,0,,16.76845604,-23.1256689,7.53,0.00,0,0,0 104,Klymene,15.14,133.9,4.0680,0,0,2.643,-5.81,,6.8,0 0,161.1245,2023,1,30,31.6526,41.6596,2.7899,0.16175,3.14582,2.63697,8.52,5.0,0.15 1.033,0.0130,0.0015,99,0.0015,Known errors,-1.00,-1,-1,-1 20230130_230502,59914.10 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org