IOTA/IOTA-ES occultation update for (7773) Kyokuchiken / UCAC4 307-136994 event on 2024 Oct 11, 15:44 UT Visible from Summary ------- On 2024 Oct 11 UT, the 9.967 km diameter asteroid (7773) Kyokuchiken will occult a 11.8 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 6.39 mag to 18.16 mag (the magnitude of the asteroid) for at most 0.330 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 11, 15:41 - 2024 Oct 11, 15:48 * geocentric midpoint of event [JD]: 2460595.15605088 * magnitude of target star: 11.77 * magnitude drop [mag]: 6.39 * estimated maximum duration [s]: 0.330 * Moon: 60 % sunlit, 31° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 94°) * approx speed of asteroid's shadow [km/s]: 29.9675 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 307-136994 by 7773 Kyokuchiken on 2024 Oct 11 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 - 72 0 0 8 12 4 15 41 14.4 1 119 70 8 8 55 8 15 13 8 6 28 8 17 41 .... - 71 0 0 7 39 3 15 41 14.6 2 119 71 7 35 54 7 42 12 7 33 27 7 44 40 -0.06 - 70 0 0 7 6 7 15 41 14.7 3 119 72 7 2 58 7 9 16 7 0 31 7 11 43 -0.11 - 69 0 0 6 33 17 15 41 15.0 4 119 73 6 30 8 6 36 25 6 27 41 6 38 53 -0.13 - 68 0 0 6 0 33 15 41 15.4 5 120 74 5 57 25 6 3 42 5 54 58 6 6 9 -0.15 - 67 0 0 5 27 58 15 41 15.8 7 120 75 5 24 50 5 31 6 5 22 23 5 33 33 -0.16 - 66 0 0 4 55 31 15 41 16.4 8 120 76 4 52 23 4 58 39 4 49 56 5 1 6 -0.16 - 65 0 0 4 23 14 15 41 17.0 9 120 77 4 20 7 4 26 22 4 17 40 4 28 48 -0.17 - 64 0 0 3 51 8 15 41 17.7 10 120 78 3 48 1 3 54 15 3 45 34 3 56 42 -0.17 - 63 0 0 3 19 13 15 41 18.5 11 120 78 3 16 6 3 22 20 3 13 40 3 24 47 -0.17 - 62 0 0 2 47 31 15 41 19.3 12 120 79 2 44 24 2 50 38 2 41 58 2 53 4 -0.18 - 61 0 0 2 16 2 15 41 20.3 13 120 80 2 12 56 2 19 9 2 10 30 2 21 34 -0.18 - 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9 57 22 -10 5 29 - 9 55 5 -0.20 50 0 0 - 9 39 15 15 46 56.2 49 237 -18 - 9 42 10 - 9 36 19 - 9 44 28 - 9 34 2 -0.20 51 0 0 - 9 17 44 15 46 59.2 48 237 -19 - 9 20 40 - 9 14 48 - 9 22 58 - 9 12 30 -0.20 52 0 0 - 8 55 45 15 47 2.2 47 237 -20 - 8 58 41 - 8 52 48 - 9 0 59 - 8 50 30 -0.20 53 0 0 - 8 33 17 15 47 5.1 46 237 -21 - 8 36 14 - 8 30 20 - 8 38 33 - 8 28 2 -0.20 54 0 0 - 8 10 22 15 47 8.0 45 237 -23 - 8 13 20 - 8 7 25 - 8 15 38 - 8 5 6 -0.20 55 0 0 - 7 46 59 15 47 10.8 44 237 -24 - 7 49 57 - 7 44 2 - 7 52 16 - 7 41 42 -0.20 56 0 0 - 7 23 9 15 47 13.6 43 237 -25 - 7 26 8 - 7 20 11 - 7 28 27 - 7 17 52 -0.20 57 0 0 - 6 58 53 15 47 16.4 42 238 -26 - 7 1 51 - 6 55 54 - 7 4 11 - 6 53 34 -0.20 58 0 0 - 6 34 10 15 47 19.1 40 238 -27 - 6 37 9 - 6 31 10 - 6 39 29 - 6 28 50 -0.20 59 0 0 - 6 9 0 15 47 21.7 39 238 -28 - 6 12 0 - 6 6 1 - 6 14 20 - 6 3 40 -0.20 60 0 0 - 5 43 25 15 47 24.3 38 238 -29 - 5 46 25 - 5 40 25 - 5 48 46 - 5 38 4 -0.20 61 0 0 - 5 17 25 15 47 26.8 37 238 -30 - 5 20 25 - 5 14 24 - 5 22 46 - 5 12 3 -0.20 62 0 0 - 4 51 0 15 47 29.3 36 238 -31 - 4 54 1 - 4 47 59 - 4 56 22 - 4 45 38 -0.20 63 0 0 - 4 24 11 15 47 31.8 35 238 -32 - 4 27 12 - 4 21 9 - 4 29 34 - 4 18 47 -0.20 64 0 0 - 3 56 58 15 47 34.1 34 238 -33 - 3 59 59 - 3 53 56 - 4 2 21 - 3 51 34 -0.20 65 0 0 - 3 29 21 15 47 36.4 33 238 -34 - 3 32 23 - 3 26 19 - 3 34 46 - 3 23 57 -0.20 66 0 0 - 3 1 22 15 47 38.7 32 238 -35 - 3 4 25 - 2 58 20 - 3 6 48 - 2 55 57 -0.20 67 0 0 - 2 33 1 15 47 40.9 31 238 -36 - 2 36 4 - 2 29 58 - 2 38 27 - 2 27 35 -0.20 68 0 0 - 2 4 19 15 47 43.0 30 238 -38 - 2 7 22 - 2 1 15 - 2 9 45 - 1 58 52 -0.20 69 0 0 - 1 35 15 15 47 45.1 28 238 -39 - 1 38 19 - 1 32 11 - 1 40 43 - 1 29 48 -0.20 70 0 0 - 1 5 52 15 47 47.0 27 238 -40 - 1 8 56 - 1 2 48 - 1 11 20 - 1 0 23 -0.20 71 0 0 - 0 36 9 15 47 49.0 26 238 -41 - 0 39 13 - 0 33 4 - 0 41 38 - 0 30 40 -0.20 72 0 0 - 0 6 7 15 47 50.8 25 238 -42 - 0 9 12 - 0 3 2 - 0 11 36 - 0 0 37 -0.20 73 0 0 0 24 13 15 47 52.6 24 238 -43 0 21 7 0 27 18 0 18 43 0 29 43 -0.20 74 0 0 0 54 50 15 47 54.3 23 238 -44 0 51 44 0 57 55 0 49 19 1 0 21 -0.20 75 0 0 1 25 43 15 47 55.9 22 238 -45 1 22 37 1 28 49 1 20 12 1 31 15 -0.20 76 0 0 1 56 52 15 47 57.4 21 238 -46 1 53 46 1 59 59 1 51 20 2 2 24 -0.20 77 0 0 2 28 16 15 47 58.9 19 238 -47 2 25 10 2 31 23 2 22 44 2 33 49 -0.20 78 0 0 2 59 54 15 48 0.3 18 238 -48 2 56 47 3 3 1 2 54 21 3 5 27 -0.20 79 0 0 3 31 45 15 48 1.6 17 239 -49 3 28 38 3 34 52 3 26 12 3 37 19 -0.20 80 0 0 4 3 48 15 48 2.8 16 239 -50 4 0 41 4 6 56 3 58 14 4 9 22 -0.20 81 0 0 4 36 3 15 48 4.0 15 239 -51 4 32 55 4 39 11 4 30 28 4 41 37 -0.20 82 0 0 5 8 28 15 48 5.1 14 239 -53 5 5 20 5 11 36 5 2 53 5 14 3 -0.19 83 0 0 5 41 2 15 48 6.0 13 239 -54 5 37 54 5 44 10 5 35 27 5 46 37 -0.19 84 0 0 6 13 45 15 48 6.9 12 239 -55 6 10 36 6 16 53 6 8 9 6 19 21 -0.19 85 0 0 6 46 35 15 48 7.8 10 239 -56 6 43 26 6 49 44 6 40 59 6 52 11 -0.19 86 0 0 7 19 32 15 48 8.5 9 239 -57 7 16 23 7 22 41 7 13 55 7 25 8 -0.19 87 0 0 7 52 34 15 48 9.2 8 239 -58 7 49 25 7 55 43 7 46 57 7 58 11 -0.19 88 0 0 8 25 41 15 48 9.7 7 240 -59 8 22 32 8 28 50 8 20 4 8 31 18 -0.19 89 0 0 8 58 52 15 48 10.2 6 240 -60 8 55 42 9 2 1 8 53 14 9 4 29 -0.19 90 0 0 9 32 5 15 48 10.6 5 240 -61 9 28 55 9 35 14 9 26 27 9 37 42 -0.19 91 0 0 10 5 20 15 48 10.9 4 240 -62 10 2 10 10 8 29 9 59 42 10 10 57 -0.18 92 0 0 10 38 35 15 48 11.1 2 240 -63 10 35 25 10 41 45 10 32 57 10 44 13 -0.18 93 0 0 11 11 50 15 48 11.3 1 240 -63 11 8 40 11 15 0 11 6 12 11 17 28 -0.16 94 0 0 11 45 3 15 48 11.3 0 241 -64 11 41 54 11 48 13 11 39 26 11 50 41 0.05 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 307-136994 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 52 31.1519 DE: -28 38 09.900 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 52 31.1518 DE: -28 38 09.900 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7773) Kyokuchiken asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.48500 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 25 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): 0.015", 0.002", 94.122° remarks: * orbital elements for (7773)Kyokuchiken : Mean anomaly = 7.7275115168 deg Arg. of pericenter = 245.8449164342 deg Long. of node = 35.9214386965 deg Inclination = 5.6977226462 deg Eccentricity = 0.1426685806 Semimajor axis = 2.7227949071 AU Perihelion dist = 2.3343376225 AU Mag: H = 13.23, G = 0.15 Epoch of elements : MJD 60594.65605058 TDT (2024 Oct 11.6561) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.33,2024,10,11,15.745221,-0.006878,0.201307,16.905801,0.542138,0.005217,-0.000228,-0.000001,0.000000 11.6186,-28.6432,-59.53,-7.37,False UCAC4 307-136994,17.87532001,-28.6360833,12.37,11.77,11.45,0.0,0,,17.90129260,-28.6431898,6.40,6.27,0,0,0 7773,Kyokuchiken,18.16,9.967,2.4850,0,0,4.545,1.92,,1.6,0 0,7.5836,2024,10,11,245.8449,35.9214,5.6977,0.14267,2.72279,2.33434,13.23,5.0,0.15 1.391,0.0147,0.0016,94,0.0022,Known errors,0.70,0,-1,-1 20241011_136994,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org