IOTA/IOTA-ES occultation update for (73) Klytia / TYC 6890-00050-1 event on 2024 Nov 17, 12:21 UT Visible from Summary ------- On 2024 Nov 17 UT, the 45.195021827135 km diameter asteroid (73) Klytia will occult a 9.7 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.90 mag to 14.58 mag (the magnitude of the asteroid) for at most 1.370 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: 2024 Nov 17, 12:18 - 2024 Nov 17, 12:24 * geocentric midpoint of event [JD]: 2460632.01474804 * magnitude of target star: 9.69 * magnitude drop [mag]: 4.90 * estimated maximum duration [s]: 1.370 * Moon: 96 % sunlit, 144° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 80°) * approx speed of asteroid's shadow [km/s]: 33.0479 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6890-00050-1 by 73 Klytia on 2024 Nov 17 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 - 53 0 0 -35 51 45 12 18 22.9 0 119 47 -36 7 36 -35 35 56 -36 10 56 -35 32 37 .... - 52 0 0 -36 18 24 12 18 22.9 1 118 48 -36 34 14 -36 2 36 -36 37 34 -35 59 18 0.47 - 51 0 0 -36 44 47 12 18 23.0 2 117 49 -37 0 36 -36 29 0 -37 3 56 -36 25 42 0.49 - 50 0 0 -37 10 53 12 18 23.2 3 117 49 -37 26 41 -36 55 8 -37 30 0 -36 51 49 0.50 - 49 0 0 -37 36 42 12 18 23.4 4 116 50 -37 52 29 -37 20 58 -37 55 48 -37 17 40 0.51 - 48 0 0 -38 2 13 12 18 23.7 5 116 51 -38 17 58 -37 46 30 -38 21 17 -37 43 13 0.51 - 47 0 0 -38 27 26 12 18 24.0 6 115 51 -38 43 10 -38 11 45 -38 46 28 -38 8 27 0.51 - 46 0 0 -38 52 21 12 18 24.3 7 114 52 -39 8 3 -38 36 41 -39 11 21 -38 33 24 0.51 - 45 0 0 -39 16 56 12 18 24.8 7 114 53 -39 32 37 -39 1 18 -39 35 55 -38 58 1 0.52 - 44 0 0 -39 41 12 12 18 25.2 8 113 53 -39 56 51 -39 25 35 -40 0 9 -39 22 19 0.52 - 43 0 0 -40 5 8 12 18 25.7 9 112 54 -40 20 46 -39 49 33 -40 24 3 -39 46 17 0.52 - 42 0 0 -40 28 45 12 18 26.3 10 112 54 -40 44 20 -40 13 11 -40 47 37 -40 9 55 0.52 - 41 0 0 -40 52 0 12 18 26.9 11 111 55 -41 7 34 -40 36 29 -41 10 51 -40 33 13 0.52 - 40 0 0 -41 14 56 12 18 27.5 12 110 55 -41 30 28 -40 59 26 -41 33 44 -40 56 11 0.52 - 39 0 0 -41 37 30 12 18 28.2 13 110 56 -41 53 0 -41 22 2 -41 56 16 -41 18 47 0.52 - 38 0 0 -41 59 43 12 18 28.9 13 109 56 -42 15 11 -41 44 17 -42 18 27 -41 41 3 0.52 - 37 0 0 -42 21 35 12 18 29.6 14 108 56 -42 37 1 -42 6 11 -42 40 16 -42 2 57 0.52 - 36 0 0 -42 43 5 12 18 30.4 15 108 57 -42 58 30 -42 27 43 -43 1 44 -42 24 30 0.52 - 35 0 0 -43 4 14 12 18 31.3 16 107 57 -43 19 36 -42 48 54 -43 22 50 -42 45 41 0.52 - 34 0 0 -43 25 0 12 18 32.1 17 106 58 -43 40 21 -43 9 43 -43 43 34 -43 6 30 0.52 - 33 0 0 -43 45 25 12 18 33.0 17 105 58 -44 0 43 -43 30 9 -44 3 56 -43 26 57 0.52 - 32 0 0 -44 5 28 12 18 34.0 18 105 58 -44 20 44 -43 50 14 -44 23 56 -43 47 2 0.52 - 31 0 0 -44 25 8 12 18 34.9 19 104 58 -44 40 22 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0 0 -23 20 27 12 23 52.0 20 253 -32 -23 36 16 -23 4 41 -23 39 36 -23 1 23 0.54 131 0 0 -22 50 39 12 23 53.4 19 252 -33 -23 6 26 -22 34 54 -23 9 46 -22 31 36 0.55 132 0 0 -22 20 56 12 23 54.6 18 252 -34 -22 36 42 -22 5 13 -22 40 1 -22 1 55 0.55 133 0 0 -21 51 20 12 23 55.8 17 251 -35 -22 7 4 -21 35 38 -22 10 23 -21 32 21 0.55 134 0 0 -21 21 51 12 23 57.0 16 251 -36 -21 37 34 -21 6 11 -21 40 52 -21 2 54 0.55 135 0 0 -20 52 30 12 23 58.1 15 251 -37 -21 8 12 -20 36 52 -21 11 30 -20 33 35 0.55 136 0 0 -20 23 19 12 23 59.1 14 250 -38 -20 38 59 -20 7 42 -20 42 16 -20 4 25 0.56 137 0 0 -19 54 17 12 24 0.0 13 250 -39 -20 9 55 -19 38 42 -20 13 12 -19 35 26 0.56 138 0 0 -19 25 27 12 24 0.9 12 250 -40 -19 41 3 -19 9 53 -19 44 20 -19 6 37 0.56 139 0 0 -18 56 48 12 24 1.7 11 249 -41 -19 12 22 -18 41 16 -19 15 38 -18 38 1 0.56 140 0 0 -18 28 21 12 24 2.4 10 249 -42 -18 43 53 -18 12 51 -18 47 9 -18 9 36 0.57 141 0 0 -18 0 8 12 24 3.0 9 249 -43 -18 15 38 -17 44 40 -18 18 54 -17 41 25 0.57 142 0 0 -17 32 8 12 24 3.6 8 248 -44 -17 47 37 -17 16 42 -17 50 52 -17 13 28 0.58 143 0 0 -17 4 24 12 24 4.1 7 248 -45 -17 19 50 -16 49 0 -17 23 5 -16 45 46 0.59 144 0 0 -16 36 55 12 24 4.5 5 248 -46 -16 52 19 -16 21 33 -16 55 33 -16 18 19 0.60 145 0 0 -16 9 42 12 24 4.9 4 247 -47 -16 25 4 -15 54 22 -16 28 18 -15 51 9 0.62 146 0 0 -15 42 46 12 24 5.1 3 247 -48 -15 58 6 -15 27 28 -16 1 19 -15 24 16 0.65 147 0 0 -15 16 7 12 24 5.3 2 247 -49 -15 31 25 -15 0 52 -15 34 38 -14 57 40 0.71 148 0 0 -14 49 47 12 24 5.5 1 247 -50 -15 5 3 -14 34 34 -15 8 16 -14 31 22 0.88 149 0 0 -14 23 46 12 24 5.5 0 246 -51 -14 39 0 -14 8 35 -14 42 12 -14 5 24 2.99 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6890-00050-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 42 46.0485 DE: -23 04 00.504 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 42 46.0482 DE: -23 04 00.505 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.7 * B mag [mag]: 9.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (73) Klytia asteroid class: approx. diameter [km]: 45 approx. diameter ["]: 0.020 distance from Earth [AU]: 3.08820 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 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): 0.009", 0.002", 79.934° remarks: * orbital elements for (73)Klytia : Mean anomaly = 252.9639992800 deg Arg. of pericenter = 56.3885709991 deg Long. of node = 6.8338501317 deg Inclination = 2.3694572535 deg Eccentricity = 0.0422598921 Semimajor axis = 2.6644523795 AU Perihelion dist = 2.5518529095 AU Mag: H = 9.03, G = 0.15 Epoch of elements : MJD 60631.51474776 TDT (2024 Nov 17.5147) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr24,1.37,2024,11,17,12.353953,0.094822,-0.449070,18.256673,3.825420,0.004902,0.000775,-0.000001,0.000000 53.6986,-23.0093,-9.04,-19.17,False TYC 6890-00050-1,19.71279130,-23.0668067,9.93,9.69,9.56,0.1,0,,19.73733646,-23.0093500,4.90,4.58,0,0,0 73,Klytia,14.58,45.419,3.0882,0,0,3.766,10.90,,2.4,0 0,252.8473,2024,11,17,56.3886,6.8339,2.3695,0.04226,2.66445,2.55185,9.03,5.0,0.15 1.105,0.0090,0.0021,80,0.0021,Known errors,1.01,0,-1,-1 20241117_0050-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org