IOTA/IOTA-ES occultation update for (7773) Kyokuchiken / UCAC4 307-110118 event on 2024 Sep 15, 07:41 UT Visible from Summary ------- On 2024 Sep 15 UT, the 9.82217378991921 km diameter asteroid (7773) Kyokuchiken will occult a 11.5 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.47 mag to 17.93 mag (the magnitude of the asteroid) for at most 0.470 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: 95 * date and approx. time of event: 2024 Sep 15, 07:37 - 2024 Sep 15, 07:46 * geocentric midpoint of event [JD]: 2460568.82066042 * magnitude of target star: 11.46 * magnitude drop [mag]: 6.47 * estimated maximum duration [s]: 0.470 * Moon: 89 % sunlit, 55° distance * Sun: 86° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 0.44 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 100°) * approx speed of asteroid's shadow [km/s]: 21.3259 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 307-110118 by 7773 Kyokuchiken on 2024 Sep 15 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 71 0 0 .. .. .... .. .. .. .. .. .. 21 38 15 .. .. .. 21 35 14 .. .. .. .... 72 0 0 21 7 53 7 37 10.5 1 121 70 21 4 28 21 11 19 21 1 27 21 14 20 .... 73 0 0 20 34 6 7 37 10.7 2 122 70 20 30 41 20 37 31 20 27 40 20 40 32 -0.23 74 0 0 20 0 19 7 37 11.0 3 122 70 19 56 54 20 3 44 19 53 54 20 6 45 -0.29 75 0 0 19 26 35 7 37 11.4 4 122 70 19 23 10 19 29 59 19 20 10 19 33 0 -0.32 76 0 0 18 52 54 7 37 11.9 5 123 70 18 49 30 18 56 18 18 46 29 18 59 19 -0.34 77 0 0 18 19 17 7 37 12.5 7 123 70 18 15 53 18 22 41 18 12 53 18 25 41 -0.36 78 0 0 17 45 46 7 37 13.3 8 123 70 17 42 22 17 49 10 17 39 23 17 52 10 -0.36 79 0 0 17 12 21 7 37 14.2 9 124 70 17 8 58 17 15 45 17 5 58 17 18 44 -0.37 80 0 0 16 39 4 7 37 15.2 10 124 69 16 35 41 16 42 27 16 32 42 16 45 26 -0.38 81 0 0 16 5 55 7 37 16.4 11 124 69 16 2 33 16 9 18 15 59 34 16 12 17 -0.38 82 0 0 15 32 56 7 37 17.6 12 125 69 15 29 34 15 36 19 15 26 36 15 39 17 -0.39 83 0 0 15 0 8 7 37 19.0 13 125 68 14 56 46 15 3 30 14 53 48 15 6 28 -0.39 84 0 0 14 27 31 7 37 20.5 14 125 67 14 24 10 14 30 53 14 21 12 14 33 51 -0.39 85 0 0 13 55 7 7 37 22.1 15 125 67 13 51 46 13 58 29 13 48 49 14 1 26 -0.39 86 0 0 13 22 57 7 37 23.9 17 126 66 13 19 36 13 26 18 13 16 39 13 29 15 -0.40 87 0 0 12 51 1 7 37 25.7 18 126 66 12 47 41 12 54 22 12 44 44 12 57 18 -0.40 88 0 0 12 19 21 7 37 27.7 19 126 65 12 16 1 12 22 41 12 13 5 12 25 37 -0.40 89 0 0 11 47 57 7 37 29.8 20 127 64 11 44 38 11 51 17 11 41 42 11 54 13 -0.40 90 0 0 11 16 51 7 37 32.0 21 127 63 11 13 32 11 20 10 11 10 37 11 23 5 -0.40 91 0 0 10 46 3 7 37 34.3 22 127 62 10 42 45 10 49 21 10 39 50 10 52 17 -0.40 92 0 0 10 15 34 7 37 36.7 23 127 62 10 12 16 10 18 52 10 9 22 10 21 47 -0.40 93 0 0 9 45 25 7 37 39.3 24 128 61 9 42 8 9 48 42 9 39 14 9 51 37 -0.40 94 0 0 9 15 37 7 37 41.9 25 128 60 9 12 20 9 18 54 9 9 26 9 21 47 -0.41 95 0 0 8 46 10 7 37 44.7 26 128 59 8 42 54 8 49 26 8 40 0 8 52 20 -0.41 96 0 0 8 17 5 7 37 47.5 27 128 58 8 13 50 8 20 21 8 10 57 8 23 14 -0.41 97 0 0 7 48 24 7 37 50.5 29 129 57 7 45 9 7 51 39 7 42 16 7 54 32 -0.41 98 0 0 7 20 6 7 37 53.5 30 129 56 7 16 51 7 23 21 7 13 59 7 26 13 -0.41 99 0 0 6 52 12 7 37 56.7 31 129 55 6 48 58 6 55 27 6 46 7 6 58 18 -0.41 100 0 0 6 24 44 7 37 59.9 32 130 54 6 21 30 6 27 58 6 18 39 6 30 49 -0.41 101 0 0 5 57 41 7 38 3.3 33 130 53 5 54 28 6 0 54 5 51 38 6 3 45 -0.41 102 0 0 5 31 4 7 38 6.7 34 130 52 5 27 52 5 34 17 5 25 2 5 37 7 -0.41 103 0 0 5 4 54 7 38 10.3 35 130 51 5 1 42 5 8 7 4 58 53 5 10 56 -0.41 104 0 0 4 39 12 7 38 13.9 36 131 50 4 36 0 4 42 23 4 33 11 4 45 13 -0.41 105 0 0 4 13 57 7 38 17.6 37 131 49 4 10 46 4 17 8 4 7 58 4 19 57 -0.41 106 0 0 3 49 10 7 38 21.4 38 131 48 3 46 0 3 52 21 3 43 12 3 55 9 -0.41 107 0 0 3 24 53 7 38 25.2 39 132 47 3 21 43 3 28 3 3 18 55 3 30 50 -0.42 108 0 0 3 1 4 7 38 29.2 40 132 46 2 57 55 3 4 13 2 55 7 3 7 1 -0.42 109 0 0 2 37 45 7 38 33.2 41 133 45 2 34 36 2 40 54 2 31 49 2 43 41 -0.42 110 0 0 2 14 56 7 38 37.3 42 133 44 2 11 47 2 18 4 2 9 1 2 20 51 -0.42 111 0 0 1 52 37 7 38 41.4 43 133 43 1 49 29 1 55 45 1 46 43 1 58 31 -0.42 112 0 0 1 30 49 7 38 45.7 44 134 42 1 27 42 1 33 56 1 24 56 1 36 42 -0.42 113 0 0 1 9 32 7 38 50.0 45 134 41 1 6 25 1 12 39 1 3 40 1 15 24 -0.42 114 0 0 0 48 46 7 38 54.3 46 135 40 0 45 40 0 51 52 0 42 55 0 54 37 -0.42 115 0 0 0 28 32 7 38 58.7 47 135 39 0 25 26 0 31 38 0 22 42 0 34 22 -0.42 116 0 0 0 8 49 7 39 3.2 48 136 38 0 5 44 0 11 55 0 3 0 0 14 39 -0.42 117 0 0 - 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1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.016", 0.002", 99.68° remarks: * orbital elements for (7773)Kyokuchiken : Mean anomaly = 1.9481822479 deg Arg. of pericenter = 245.8471464107 deg Long. of node = 35.9218583586 deg Inclination = 5.6977358434 deg Eccentricity = 0.1426881421 Semimajor axis = 2.7228585033 AU Perihelion dist = 2.3343388821 AU Mag: H = 13.23, G = 0.15 Epoch of elements : MJD 60568.32066008 TDT (2024 Sep 15.3207) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.47,2024,9,15,7.695850,0.010201,0.394475,12.032772,-0.316756,0.005416,-0.000504,0.000000,0.000000 147.3797,-28.6592,63.34,2.79,False UCAC4 307-110118,17.14628795,-28.6261389,12.16,11.46,11.08,0.1,0,,17.17218124,-28.6592396,6.47,6.40,0,0,0 7773,Kyokuchiken,17.93,9.980,2.1761,0,0,3.695,-1.28,,1.6,0 0,1.8778,2024,9,15,245.8471,35.9219,5.6977,0.14269,2.72286,2.33434,13.23,5.0,0.15 1.441,0.0163,0.0015,100,0.0028,Known errors,0.86,0,-1,-1 20240915_110118,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org