IOTA/IOTA-ES occultation update for (7773) Kyokuchiken / UCAC4 307-111582 event on 2024 Sep 15, 22:58 UT Visible from Summary ------- On 2024 Sep 15 UT, the 9.92062258400192 km diameter asteroid (7773) Kyokuchiken will occult a 11.3 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 6.59 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, 22:53 - 2024 Sep 15, 23:03 * geocentric midpoint of event [JD]: 2460569.45731650 * magnitude of target star: 11.34 * magnitude drop [mag]: 6.59 * estimated maximum duration [s]: 0.470 * Moon: 93 % sunlit, 64° distance * Sun: 86° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.43 * 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]: 21.5454 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 307-111582 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 -163 0 0 12 24 52 22 53 44.1 1 120 80 12 21 39 12 28 5 12 18 53 12 30 52 .... -162 0 0 11 51 34 22 53 44.2 2 120 80 11 48 21 11 54 47 11 45 35 11 57 34 -0.08 -161 0 0 11 18 16 22 53 44.5 3 120 81 11 15 3 11 21 29 11 12 17 11 24 15 -0.13 -160 0 0 10 44 58 22 53 44.9 4 120 81 10 41 46 10 48 11 10 38 59 10 50 58 -0.16 -159 0 0 10 11 43 22 53 45.4 5 120 80 10 8 30 10 14 55 10 5 44 10 17 42 -0.17 -158 0 0 9 38 30 22 53 46.0 7 121 80 9 35 17 9 41 42 9 32 31 9 44 28 -0.18 -157 0 0 9 5 20 22 53 46.8 8 121 80 9 2 8 9 8 33 8 59 22 9 11 19 -0.19 -156 0 0 8 32 16 22 53 47.6 9 121 79 8 29 4 8 35 28 8 26 18 8 38 14 -0.19 -155 0 0 7 59 17 22 53 48.6 10 121 79 7 56 5 8 2 29 7 53 20 8 5 15 -0.19 -154 0 0 7 26 25 22 53 49.7 11 121 78 7 23 14 7 29 37 7 20 28 7 32 23 -0.20 -153 0 0 6 53 41 22 53 50.9 12 121 78 6 50 30 6 56 53 6 47 44 6 59 38 -0.20 -152 0 0 6 21 6 22 53 52.3 13 121 77 6 17 55 6 24 17 6 15 9 6 27 2 -0.20 -151 0 0 5 48 40 22 53 53.7 15 122 76 5 45 29 5 51 51 5 42 44 5 54 36 -0.20 -150 0 0 5 16 25 22 53 55.3 16 122 75 5 13 14 5 19 36 5 10 30 5 22 20 -0.21 -149 0 0 4 44 21 22 53 57.0 17 122 74 4 41 11 4 47 32 4 38 27 4 50 16 -0.21 -148 0 0 4 12 30 22 53 58.8 18 122 73 4 9 20 4 15 41 4 6 36 4 18 25 -0.21 -147 0 0 3 40 53 22 54 0.7 19 122 72 3 37 43 3 44 3 3 34 59 3 46 47 -0.21 -146 0 0 3 9 30 22 54 2.7 20 122 71 3 6 20 3 12 39 3 3 37 3 15 23 -0.21 -145 0 0 2 38 21 22 54 4.8 21 122 70 2 35 12 2 41 31 2 32 29 2 44 14 -0.21 -144 0 0 2 7 29 22 54 7.1 22 122 69 2 4 21 2 10 38 2 1 38 2 13 21 -0.21 -143 0 0 1 36 54 22 54 9.4 24 122 68 1 33 46 1 40 2 1 31 3 1 42 45 -0.21 -142 0 0 1 6 36 22 54 11.9 25 122 67 1 3 28 1 9 44 1 0 46 1 12 27 -0.21 -141 0 0 0 36 37 22 54 14.4 26 123 66 0 33 29 0 39 45 0 30 47 0 42 27 -0.22 -140 0 0 0 6 57 22 54 17.1 27 123 65 0 3 50 0 10 4 0 1 8 0 12 46 -0.22 -139 0 0 - 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51 0 0 -12 8 12 23 1 3.3 56 236 -25 -12 11 6 -12 5 19 -12 13 36 -12 2 49 -0.23 - 50 0 0 -11 53 14 23 1 7.8 55 236 -27 -11 56 8 -11 50 20 -11 58 38 -11 47 50 -0.23 - 49 0 0 -11 37 44 23 1 12.2 54 236 -28 -11 40 38 -11 34 50 -11 43 9 -11 32 20 -0.23 - 48 0 0 -11 21 44 23 1 16.6 53 237 -29 -11 24 38 -11 18 49 -11 27 9 -11 16 19 -0.23 - 47 0 0 -11 5 13 23 1 21.0 52 237 -30 -11 8 8 -11 2 18 -11 10 39 -10 59 47 -0.23 - 46 0 0 -10 48 11 23 1 25.3 51 237 -31 -10 51 7 -10 45 16 -10 53 38 -10 42 45 -0.23 - 45 0 0 -10 30 39 23 1 29.6 50 237 -32 -10 33 35 -10 27 44 -10 36 7 -10 25 12 -0.23 - 44 0 0 -10 12 37 23 1 33.8 49 237 -33 -10 15 33 -10 9 41 -10 18 5 -10 7 9 -0.23 - 43 0 0 - 9 54 5 23 1 38.0 48 238 -34 - 9 57 1 - 9 51 8 - 9 59 33 - 9 48 36 -0.23 - 42 0 0 - 9 35 2 23 1 42.1 47 238 -35 - 9 37 59 - 9 32 5 - 9 40 32 - 9 29 32 -0.23 - 41 0 0 - 9 15 30 23 1 46.2 46 238 -36 - 9 18 27 - 9 12 32 - 9 21 0 - 9 9 59 -0.23 - 40 0 0 - 8 55 28 23 1 50.2 45 238 -37 - 8 58 25 - 8 52 30 - 9 0 59 - 8 49 57 -0.23 - 39 0 0 - 8 34 56 23 1 54.1 44 238 -38 - 8 37 54 - 8 31 58 - 8 40 28 - 8 29 24 -0.23 - 38 0 0 - 8 13 56 23 1 58.0 43 238 -39 - 8 16 54 - 8 10 57 - 8 19 28 - 8 8 23 -0.23 - 37 0 0 - 7 52 26 23 2 1.8 42 238 -40 - 7 55 25 - 7 49 27 - 7 58 0 - 7 46 52 -0.23 - 36 0 0 - 7 30 28 23 2 5.6 41 238 -41 - 7 33 27 - 7 27 28 - 7 36 2 - 7 24 53 -0.23 - 35 0 0 - 7 8 1 23 2 9.3 40 238 -42 - 7 11 1 - 7 5 1 - 7 13 36 - 7 2 26 -0.23 - 34 0 0 - 6 45 6 23 2 12.9 39 238 -43 - 6 48 6 - 6 42 6 - 6 50 42 - 6 39 30 -0.23 - 33 0 0 - 6 21 43 23 2 16.4 38 238 -44 - 6 24 44 - 6 18 43 - 6 27 20 - 6 16 6 -0.23 - 32 0 0 - 5 57 53 23 2 19.9 37 238 -45 - 6 0 54 - 5 54 52 - 6 3 31 - 5 52 15 -0.23 - 31 0 0 - 5 33 36 23 2 23.3 36 238 -46 - 5 36 38 - 5 30 34 - 5 39 14 - 5 27 57 -0.23 - 30 0 0 - 5 8 52 23 2 26.6 34 238 -47 - 5 11 54 - 5 5 50 - 5 14 31 - 5 3 13 -0.23 - 29 0 0 - 4 43 42 23 2 29.9 33 239 -48 - 4 46 44 - 4 40 39 - 4 49 22 - 4 38 1 -0.23 - 28 0 0 - 4 18 6 23 2 33.0 32 239 -49 - 4 21 9 - 4 15 3 - 4 23 47 - 4 12 24 -0.23 - 27 0 0 - 3 52 4 23 2 36.1 31 239 -50 - 3 55 7 - 3 49 1 - 3 57 46 - 3 46 22 -0.23 - 26 0 0 - 3 25 38 23 2 39.1 30 239 -51 - 3 28 41 - 3 22 34 - 3 31 20 - 3 19 55 -0.23 - 25 0 0 - 2 58 47 23 2 42.0 29 239 -52 - 3 1 51 - 2 55 42 - 3 4 30 - 2 53 3 -0.23 - 24 0 0 - 2 31 32 23 2 44.8 28 239 -53 - 2 34 37 - 2 28 27 - 2 37 16 - 2 25 48 -0.23 - 23 0 0 - 2 3 54 23 2 47.5 27 239 -54 - 2 6 59 - 2 0 49 - 2 9 39 - 1 58 9 -0.23 - 22 0 0 - 1 35 53 23 2 50.1 26 239 -55 - 1 38 59 - 1 32 47 - 1 41 39 - 1 30 7 -0.23 - 21 0 0 - 1 7 30 23 2 52.6 25 239 -56 - 1 10 36 - 1 4 24 - 1 13 17 - 1 1 43 -0.22 - 20 0 0 - 0 38 46 23 2 55.1 24 239 -57 - 0 41 52 - 0 35 39 - 0 44 33 - 0 32 58 -0.22 - 19 0 0 - 0 9 40 23 2 57.4 22 239 -58 - 0 12 47 - 0 6 33 - 0 15 28 - 0 3 52 -0.22 - 18 0 0 0 19 45 23 2 59.6 21 239 -59 0 16 38 0 22 52 0 13 56 0 25 34 -0.22 - 17 0 0 0 49 30 23 3 1.7 20 239 -60 0 46 22 0 52 38 0 43 40 0 55 20 -0.22 - 16 0 0 1 19 34 23 3 3.7 19 239 -61 1 16 26 1 22 42 1 13 43 1 25 24 -0.22 - 15 0 0 1 49 55 23 3 5.6 18 239 -62 1 46 47 1 53 4 1 44 4 1 55 46 -0.22 - 14 0 0 2 20 34 23 3 7.4 17 239 -63 2 17 25 2 23 43 2 14 42 2 26 26 -0.22 - 13 0 0 2 51 29 23 3 9.1 16 239 -64 2 48 20 2 54 38 2 45 37 2 57 22 -0.22 - 12 0 0 3 22 40 23 3 10.6 15 239 -64 3 19 30 3 25 49 3 16 47 3 28 33 -0.22 - 11 0 0 3 54 5 23 3 12.1 13 239 -65 3 50 55 3 57 15 3 48 11 3 59 59 -0.22 - 10 0 0 4 25 44 23 3 13.4 12 239 -66 4 22 34 4 28 54 4 19 50 4 31 38 -0.22 - 9 0 0 4 57 36 23 3 14.6 11 239 -67 4 54 26 5 0 47 4 51 41 5 3 31 -0.22 - 8 0 0 5 29 40 23 3 15.8 10 240 -68 5 26 30 5 32 51 5 23 45 5 35 36 -0.22 - 7 0 0 6 1 56 23 3 16.7 9 240 -68 5 58 45 6 5 7 5 56 0 6 7 52 -0.22 - 6 0 0 6 34 21 23 3 17.6 8 240 -69 6 31 10 6 37 32 6 28 25 6 40 17 -0.22 - 5 0 0 7 6 56 23 3 18.4 7 240 -70 7 3 44 7 10 7 7 0 59 7 12 53 -0.22 - 4 0 0 7 39 39 23 3 19.0 6 240 -70 7 36 27 7 42 51 7 33 42 7 45 36 -0.22 - 3 0 0 8 12 29 23 3 19.5 4 240 -71 8 9 17 8 15 41 8 6 32 8 18 27 -0.21 - 2 0 0 8 45 26 23 3 19.9 3 240 -71 8 42 14 8 48 38 8 39 28 8 51 24 -0.21 - 1 0 0 9 18 28 23 3 20.2 2 241 -72 9 15 16 9 21 40 9 12 30 9 24 26 -0.20 0 0 0 9 51 34 23 3 20.4 1 241 -72 9 48 22 9 54 47 9 45 36 9 57 33 -0.18 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 307-111582 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 09 43.2602 DE: -28 37 54.636 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 09 43.2601 DE: -28 37 54.636 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.3 * B mag [mag]: 12.5 * Diameter [mas]: 0.10 * 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]: 2.18370 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): 0.016", 0.002", 99.559° remarks: * orbital elements for (7773)Kyokuchiken : Mean anomaly = 2.0878945178 deg Arg. of pericenter = 245.8470880820 deg Long. of node = 35.9218487113 deg Inclination = 5.6977354674 deg Eccentricity = 0.1426877062 Semimajor axis = 2.7228571005 AU Perihelion dist = 2.3343388666 AU Mag: H = 13.23, G = 0.15 Epoch of elements : MJD 60568.95731641 TDT (2024 Sep 15.9573) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.47,2024,9,15,22.975596,0.005498,0.228073,12.156947,-0.307131,0.005412,-0.000499,0.000000,0.000000 -82.2080,-28.6644,-165.91,2.55,False UCAC4 307-111582,17.16201674,-28.6318434,12.48,11.34,10.72,0.1,0,,17.18791438,-28.6644038,6.60,6.76,0,0,0 7773,Kyokuchiken,17.93,10.079,2.1837,0,0,3.720,-1.24,,1.6,0 0,1.8779,2024,9,15,245.8471,35.9218,5.6977,0.14269,2.72286,2.33434,13.23,5.0,0.15 1.432,0.0163,0.0015,100,0.0028,Known errors,0.83,0,-1,-1 20240915_111582,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org