IOTA/IOTA-ES occultation update for (2147) Kharadze / UCAC4 377-078072 event on 2024 Sep 17, 08:01 UT Visible from Summary ------- On 2024 Sep 17 UT, the 23.9063588579461 km diameter asteroid (2147) Kharadze will occult a 10.9 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 7.52 mag to 18.37 mag (the magnitude of the asteroid) for at most 1.150 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: 99 * date and approx. time of event: 2024 Sep 17, 07:56 - 2024 Sep 17, 08:06 * geocentric midpoint of event [JD]: 2460570.83448016 * magnitude of target star: 10.85 * magnitude drop [mag]: 7.52 * estimated maximum duration [s]: 1.150 * Moon: 99 % sunlit, 88° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 100°) * approx speed of asteroid's shadow [km/s]: 21.0627 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 377-078072 by 2147 Kharadze on 2024 Sep 17 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 49 0 0 - 3 31 59 7 57 1.0 1 105 78 - 3 39 24 - 3 24 35 - 3 43 40 - 3 20 20 .... 50 0 0 - 3 48 30 7 57 1.1 2 105 79 - 3 55 56 - 3 41 5 - 4 0 12 - 3 36 50 0.37 51 0 0 - 4 5 28 7 57 1.4 3 105 80 - 4 12 54 - 3 58 2 - 4 17 11 - 3 53 45 0.40 52 0 0 - 4 22 51 7 57 1.8 4 105 80 - 4 30 18 - 4 15 24 - 4 34 35 - 4 11 7 0.41 53 0 0 - 4 40 39 7 57 2.2 5 104 81 - 4 48 7 - 4 33 11 - 4 52 25 - 4 28 54 0.41 54 0 0 - 4 58 53 7 57 2.8 6 104 81 - 5 6 22 - 4 51 24 - 5 10 40 - 4 47 6 0.42 55 0 0 - 5 17 32 7 57 3.5 7 104 82 - 5 25 2 - 5 10 2 - 5 29 21 - 5 5 44 0.42 56 0 0 - 5 36 36 7 57 4.3 8 104 82 - 5 44 7 - 5 29 5 - 5 48 26 - 5 24 46 0.42 57 0 0 - 5 56 4 7 57 5.2 9 104 82 - 6 3 36 - 5 48 33 - 6 7 56 - 5 44 13 0.43 58 0 0 - 6 15 57 7 57 6.2 10 104 82 - 6 23 29 - 6 8 24 - 6 27 50 - 6 4 4 0.43 59 0 0 - 6 36 13 7 57 7.4 11 104 81 - 6 43 47 - 6 28 40 - 6 48 8 - 6 24 19 0.43 60 0 0 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254 -49 -43 21 7 -43 6 9 -43 25 26 -43 1 51 0.49 -125 0 0 -42 59 19 8 6 15.9 4 254 -49 -43 6 49 -42 51 49 -43 11 8 -42 47 30 0.51 -124 0 0 -42 44 38 8 6 16.2 3 253 -49 -42 52 10 -42 37 7 -42 56 29 -42 32 48 0.52 -123 0 0 -42 29 37 8 6 16.4 2 252 -50 -42 37 9 -42 22 5 -42 41 29 -42 17 46 0.55 -122 0 0 -42 14 14 8 6 16.6 2 252 -50 -42 21 48 -42 6 42 -42 26 8 -42 2 22 0.61 -121 0 0 -41 58 31 8 6 16.7 1 251 -50 -42 6 5 -41 50 57 -42 10 27 -41 46 37 0.76 -120 0 0 -41 42 27 8 6 16.7 0 250 -50 -41 50 2 -41 34 52 -41 54 24 -41 30 31 2.81 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 377-078072 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 58 38.1294 DE: -14 43 42.711 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 58 38.1293 DE: -14 43 42.711 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2147) Kharadze asteroid class: approx. diameter [km]: 24 approx. diameter ["]: 0.010 distance from Earth [AU]: 3.37310 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.015", 0.001", 100.23° remarks: * orbital elements for (2147)Kharadze : Mean anomaly = 175.6795963241 deg Arg. of pericenter = 311.6474940401 deg Long. of node = 144.1418789944 deg Inclination = 10.0849469323 deg Eccentricity = 0.0583930084 Semimajor axis = 3.1727269164 AU Perihelion dist = 2.9874618470 AU Mag: H = 12.19, G = 0.15 Epoch of elements : MJD 60570.33448005 TDT (2024 Sep 17.3345) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,1.15,2024,9,17,8.027524,-0.134611,-0.371801,11.178565,-4.046395,0.005669,-0.000457,0.000000,0.000000 137.8457,-14.7662,58.18,2.01,False UCAC4 377-078072,16.97725818,-14.7285310,11.80,10.85,10.34,0.1,0,,17.00058319,-14.7661995,7.52,7.58,0,0,0 2147,Kharadze,18.37,24.151,3.3731,0,0,2.009,-10.55,,1.4,0 0,175.6213,2024,9,17,311.6475,144.1419,10.0849,0.05839,3.17273,2.98746,12.19,5.0,0.15 1.287,0.0153,0.0012,100,0.0028,Known errors,1.09,0,-1,-1 20240917_078072,60140.57 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org