IOTA/IOTA-ES occultation update for (40) Harmonia / TYC 6892-02019-1 event on 2024 Jul 27, 23:35 UT Visible from Summary ------- On 2024 Jul 27 UT, the 113.632 km diameter asteroid (40) Harmonia will occult a 11.3 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 0.24 mag to 9.79 mag (the magnitude of the asteroid) for at most 12.610 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: 2024 Jul 27, 23:23 - 2024 Jul 27, 23:47 * geocentric midpoint of event [JD]: 2460519.48307333 * magnitude of target star: 11.32 * magnitude drop [mag]: 0.24 * estimated maximum duration [s]: 12.610 * Moon: 51 % sunlit, 97° distance * Sun: 171° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 114 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.026, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.003", 82°) * approx speed of asteroid's shadow [km/s]: 9.0141 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6892-02019-1 by 40 Harmonia on 2024 Jul 27 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 - 99 0 0 -15 30 19 23 47 24.3 1 115 8 -14 56 18 -16 4 18 -14 53 16 -16 7 20 .... - 98 0 0 -15 56 58 23 47 24.0 2 115 6 -15 23 2 -16 30 52 -15 20 1 -16 33 53 0.03 - 97 0 0 -16 23 8 23 47 23.5 3 114 5 -15 49 18 -16 56 56 -15 46 17 -16 59 57 -0.01 - 96 0 0 -16 48 50 23 47 22.7 4 114 4 -16 15 5 -17 22 32 -16 12 5 -17 25 33 -0.02 - 95 0 0 -17 14 2 23 47 21.7 5 114 3 -16 40 24 -17 47 40 -16 37 24 -17 50 39 -0.03 - 94 0 0 -17 38 46 23 47 20.5 6 113 2 -17 5 13 -18 12 18 -17 2 13 -18 15 17 -0.04 - 93 0 0 -18 3 1 23 47 19.0 7 113 1 -17 29 33 -18 36 27 -17 26 34 -18 39 26 -0.04 - 92 0 0 -18 26 46 23 47 17.4 8 113 0 -17 53 24 -19 0 6 -17 50 25 -19 3 5 -0.04 - 91 0 0 -18 50 2 23 47 15.5 9 113 -1 -18 16 45 -19 23 17 -18 13 47 -19 26 15 -0.05 - 90 0 0 -19 12 48 23 47 13.4 10 112 -2 -18 39 37 -19 45 58 -18 36 39 -19 48 55 -0.05 - 89 0 0 -19 35 5 23 47 11.1 11 112 -3 -19 1 59 -20 8 9 -18 59 2 -20 11 6 -0.05 - 88 0 0 -19 56 52 23 47 8.7 12 112 -4 -19 23 51 -20 29 51 -19 20 55 -20 32 47 -0.05 - 87 0 0 -20 18 9 23 47 6.0 13 111 -5 -19 45 14 -20 51 3 -19 42 18 -20 53 59 -0.05 - 86 0 0 -20 38 57 23 47 3.1 14 111 -6 -20 6 7 -21 11 46 -20 3 11 -21 14 41 -0.05 - 85 0 0 -20 59 15 23 47 0.1 15 111 -7 -20 26 31 -21 31 59 -20 23 35 -21 34 54 -0.05 - 84 0 0 -21 19 4 23 46 56.8 16 110 -8 -20 46 24 -21 51 43 -20 43 29 -21 54 37 -0.05 - 83 0 0 -21 38 23 23 46 53.4 17 110 -9 -21 5 48 -22 10 57 -21 2 54 -22 13 51 -0.05 - 82 0 0 -21 57 13 23 46 49.8 18 109 -10 -21 24 43 -22 29 41 -21 21 48 -22 32 35 -0.05 - 81 0 0 -22 15 32 23 46 46.0 19 109 -11 -21 43 7 -22 47 56 -21 40 14 -22 50 50 -0.05 - 80 0 0 -22 33 23 23 46 42.1 20 109 -12 -22 1 2 -23 5 42 -21 58 9 -23 8 35 -0.05 - 79 0 0 -22 50 44 23 46 38.0 21 108 -13 -22 18 28 -23 22 59 -22 15 35 -23 25 51 -0.05 - 78 0 0 -23 7 36 23 46 33.8 22 108 -13 -22 35 24 -23 39 46 -22 32 32 -23 42 38 -0.05 - 77 0 0 -23 23 58 23 46 29.3 23 108 -14 -22 51 51 -23 56 4 -22 48 59 -23 58 56 -0.05 - 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Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6892-02019-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 59 26.7764 DE: -24 10 53.377 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 59 26.7764 DE: -24 10 53.378 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (40) Harmonia asteroid class: approx. diameter [km]: 114 approx. diameter ["]: 0.130 distance from Earth [AU]: 1.20650 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#135 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): 0.026", 0.003", 82.045° remarks: * orbital elements for (40)Harmonia : Mean anomaly = 301.9525128654 deg Arg. of pericenter = 269.3040079532 deg Long. of node = 94.1560444317 deg Inclination = 4.2558573603 deg Eccentricity = 0.0461101142 Semimajor axis = 2.2672207896 AU Perihelion dist = 2.1626789800 AU Mag: H = 7.29, G = 0.15 Epoch of elements : MJD 60518.98307346 TDT (2024 Jul 27.9831) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1352023Apr24,12.61,2024,7,27,23.593760,-0.014283,0.041681,-4.807586,-1.665186,0.000621,0.000453,0.000001,0.000000 0.1932,-24.1142,-172.27,18.92,False TYC 6892-02019-1,19.99077123,-24.1814935,11.78,11.32,11.07,0.0,0,,20.01569425,-24.1141723,0.24,0.20,0,0,0 40,Harmonia,9.79,113.632,1.2065,0,0,-2.559,-12.13,,5.8,0 0,301.6687,2024,7,27,269.3040,94.1560,4.2559,0.04611,2.26722,2.16268,7.29,5.0,0.15 1.045,0.0260,0.0029,82,0.0058,Known errors,1.11,0,-1,-1 20240727_2019-1,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org