IOTA/IOTA-ES occultation update for (1807) Slovakia / TYC 5764-01226-1 event on 2024 Oct 13, 15:30 UT Visible from Summary ------- On 2024 Oct 13 UT, the 9.131 km diameter asteroid (1807) Slovakia will occult a 10.7 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.02 mag to 15.73 mag (the magnitude of the asteroid) for at most 0.960 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: 97 * date and approx. time of event: 2024 Oct 13, 15:22 - 2024 Oct 13, 15:39 * geocentric midpoint of event [JD]: 2460597.14642929 * magnitude of target star: 10.72 * magnitude drop [mag]: 5.02 * estimated maximum duration [s]: 0.960 * Moon: 80 % sunlit, 20° distance * Sun: 110° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 72°) * approx speed of asteroid's shadow [km/s]: 9.5195 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5764-01226-1 by 1807 Slovakia on 2024 Oct 13 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 - 45 0 0 -45 56 14 15 22 37.1 0 108 51 -45 59 47 -45 52 41 -46 2 29 -45 50 0 .... - 44 0 0 -46 10 15 15 22 37.2 1 108 51 -46 13 49 -46 6 42 -46 16 30 -46 4 1 0.67 - 43 0 0 -46 24 11 15 22 37.4 2 107 51 -46 27 44 -46 20 38 -46 30 26 -46 17 57 0.80 - 42 0 0 -46 38 1 15 22 37.8 2 106 50 -46 41 34 -46 34 28 -46 44 15 -46 31 48 0.84 - 41 0 0 -46 51 45 15 22 38.3 3 106 50 -46 55 18 -46 48 12 -46 57 59 -46 45 32 0.86 - 40 0 0 -47 5 23 15 22 39.0 4 105 49 -47 8 56 -47 1 50 -47 11 37 -46 59 9 0.87 - 39 0 0 -47 18 54 15 22 39.8 4 104 49 -47 22 27 -47 15 21 -47 25 8 -47 12 41 0.88 - 38 0 0 -47 32 18 15 22 40.8 5 103 48 -47 35 51 -47 28 46 -47 38 32 -47 26 5 0.89 - 37 0 0 -47 45 35 15 22 41.9 6 103 48 -47 49 8 -47 42 3 -47 51 49 -47 39 22 0.89 - 36 0 0 -47 58 45 15 22 43.1 7 102 47 -48 2 18 -47 55 13 -48 4 58 -47 52 33 0.90 - 35 0 0 -48 11 48 15 22 44.4 7 101 47 -48 15 20 -48 8 15 -48 18 0 -48 5 35 0.90 - 34 0 0 -48 24 42 15 22 45.9 8 100 46 -48 28 14 -48 21 10 -48 30 55 -48 18 30 0.90 - 33 0 0 -48 37 29 15 22 47.5 9 100 46 -48 41 1 -48 33 57 -48 43 41 -48 31 17 0.90 - 32 0 0 -48 50 8 15 22 49.3 9 99 45 -48 53 40 -48 46 36 -48 56 20 -48 43 56 0.91 - 31 0 0 -49 2 38 15 22 51.1 10 98 45 -49 6 10 -48 59 7 -49 8 50 -48 56 27 0.91 - 30 0 0 -49 15 0 15 22 53.1 11 97 44 -49 18 32 -49 11 29 -49 21 12 -49 8 49 0.91 - 29 0 0 -49 27 13 15 22 55.2 11 96 44 -49 30 45 -49 23 42 -49 33 24 -49 21 2 0.91 - 28 0 0 -49 39 17 15 22 57.4 12 96 43 -49 42 49 -49 35 46 -49 45 28 -49 33 7 0.91 - 27 0 0 -49 51 13 15 22 59.8 13 95 43 -49 54 44 -49 47 42 -49 57 23 -49 45 3 0.91 - 26 0 0 -50 2 59 15 23 2.2 13 94 42 -50 6 30 -49 59 28 -50 9 9 -49 56 49 0.91 - 25 0 0 -50 14 35 15 23 4.8 14 93 41 -50 18 6 -50 11 5 -50 20 45 -50 8 26 0.91 - 24 0 0 -50 26 3 15 23 7.4 15 92 41 -50 29 33 -50 22 32 -50 32 12 -50 19 54 0.91 - 23 0 0 -50 37 20 15 23 10.2 15 92 40 -50 40 51 -50 33 50 -50 43 30 -50 31 12 0.91 - 22 0 0 -50 48 28 15 23 13.1 16 91 40 -50 51 58 -50 44 58 -50 54 37 -50 42 20 0.91 - 21 0 0 -50 59 26 15 23 16.0 17 90 39 -51 2 56 -50 55 56 -51 5 34 -50 53 18 0.91 - 20 0 0 -51 10 14 15 23 19.1 17 89 39 -51 13 43 -51 6 44 -51 16 22 -51 4 6 0.91 - 19 0 0 -51 20 51 15 23 22.3 18 88 38 -51 24 21 -51 17 22 -51 26 59 -51 14 44 0.91 - 18 0 0 -51 31 19 15 23 25.5 19 87 37 -51 34 48 -51 27 50 -51 37 26 -51 25 12 0.91 - 17 0 0 -51 41 36 15 23 28.9 19 87 37 -51 45 5 -51 38 7 -51 47 43 -51 35 29 0.91 - 16 0 0 -51 51 42 15 23 32.3 20 86 36 -51 55 11 -51 48 14 -51 57 49 -51 45 36 0.91 - 15 0 0 -52 1 38 15 23 35.9 20 85 36 -52 5 7 -51 58 10 -52 7 44 -51 55 32 0.91 - 14 0 0 -52 11 23 15 23 39.5 21 84 35 -52 14 52 -52 7 55 -52 17 29 -52 5 18 0.91 - 13 0 0 -52 20 58 15 23 43.2 22 83 34 -52 24 26 -52 17 30 -52 27 3 -52 14 53 0.91 - 12 0 0 -52 30 21 15 23 47.0 22 82 34 -52 33 49 -52 26 54 -52 36 26 -52 24 17 0.91 - 11 0 0 -52 39 34 15 23 50.8 23 81 33 -52 43 2 -52 36 7 -52 45 39 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1.05 150 0 0 -37 26 26 15 39 4.7 3 256 -37 -37 29 58 -37 22 55 -37 32 37 -37 20 15 1.08 151 0 0 -37 12 8 15 39 5.4 2 256 -37 -37 15 39 -37 8 37 -37 18 19 -37 5 58 1.14 152 0 0 -36 57 56 15 39 5.8 2 255 -37 -37 1 27 -36 54 25 -37 4 7 -36 51 46 1.25 153 0 0 -36 43 51 15 39 6.1 1 255 -37 -36 47 22 -36 40 20 -36 50 1 -36 37 41 1.60 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 5764-01226-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 45 40.3844 DE: -12 54 00.908 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 45 40.3843 DE: -12 54 00.909 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1807) Slovakia asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.010 distance from Earth [AU]: 1.29800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.016", 0.001", 72.242° remarks: * orbital elements for (1807)Slovakia : Mean anomaly = 334.3384827328 deg Arg. of pericenter = 140.5273452947 deg Long. of node = 236.2773179855 deg Inclination = 3.4913175683 deg Eccentricity = 0.1779610478 Semimajor axis = 2.2261035734 AU Perihelion dist = 1.8299438489 AU Mag: H = 12.50, G = 0.15 Epoch of elements : MJD 60596.64642909 TDT (2024 Oct 13.6464) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr24,0.96,2024,10,13,15.514303,0.057539,-0.670018,5.353401,0.459304,0.004705,0.001147,0.000000,0.000000 56.3619,-12.8099,-56.19,-8.12,False TYC 5764-01226-1,20.76121793,-12.9002522,10.95,10.72,10.60,0.0,0,,20.78405142,-12.8098948,5.02,4.70,0,0,0 1807,Slovakia,15.73,9.131,1.2980,0,0,2.481,3.12,,0.8,0 0,334.1467,2024,10,13,140.5273,236.2773,3.4913,0.17796,2.22610,1.82994,12.49,5.0,0.15 1.378,0.0157,0.0012,72,0.0037,Known errors,0.94,0,-1,-1 20241013_1226-1,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org