IOTA/IOTA-ES occultation update for (3597) Kakkuri / UCAC4 328-183609 event on 2024 Sep 21, 21:04 UT Visible from Summary ------- On 2024 Sep 21 UT, the 17.5583007536464 km diameter asteroid (3597) Kakkuri will occult a 11.2 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 6.24 mag to 17.41 mag (the magnitude of the asteroid) for at most 2.200 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: 94 * date and approx. time of event: 2024 Sep 21, 20:51 - 2024 Sep 21, 21:18 * geocentric midpoint of event [JD]: 2460575.37825425 * magnitude of target star: 11.17 * magnitude drop [mag]: 6.24 * estimated maximum duration [s]: 2.200 * Moon: 80 % sunlit, 129° distance * Sun: 105° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.46 * 1 sigma uncertainty interval [seconds]: +/- 5.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.004", 87°) * approx speed of asteroid's shadow [km/s]: 8.0476 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 328-183609 by 3597 Kakkuri on 2024 Sep 21 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 -121 0 0 - 6 47 54 20 51 28.6 0 115 75 - 6 53 12 - 6 42 36 - 6 58 3 - 6 37 45 .... -120 0 0 - 7 15 15 20 51 28.7 1 114 74 - 7 20 32 - 7 9 57 - 7 25 24 - 7 5 6 0.13 -119 0 0 - 7 42 27 20 51 29.2 2 114 72 - 7 47 44 - 7 37 10 - 7 52 35 - 7 32 19 0.08 -118 0 0 - 8 9 30 20 51 30.0 3 114 71 - 8 14 47 - 8 4 13 - 8 19 37 - 7 59 22 0.07 -117 0 0 - 8 36 22 20 51 31.1 5 114 70 - 8 41 39 - 8 31 6 - 8 46 29 - 8 26 15 0.06 -116 0 0 - 9 3 4 20 51 32.4 6 114 69 - 9 8 20 - 8 57 48 - 9 13 11 - 8 52 58 0.05 -115 0 0 - 9 29 35 20 51 34.0 7 114 68 - 9 34 51 - 9 24 19 - 9 39 40 - 9 19 29 0.05 -114 0 0 - 9 55 53 20 51 35.9 8 114 67 -10 1 9 - 9 50 37 -10 5 58 - 9 45 48 0.05 -113 0 0 -10 21 58 20 51 38.1 9 113 66 -10 27 14 -10 16 43 -10 32 3 -10 11 54 0.04 -112 0 0 -10 47 51 20 51 40.6 10 113 65 -10 53 6 -10 42 36 -10 57 54 -10 37 47 0.04 -111 0 0 -11 13 29 20 51 43.3 11 113 64 -11 18 44 -11 8 15 -11 23 32 -11 3 26 0.04 -110 0 0 -11 38 53 20 51 46.3 12 113 63 -11 44 7 -11 33 39 -11 48 55 -11 28 51 0.04 -109 0 0 -12 4 1 20 51 49.6 13 113 62 -12 9 15 -11 58 48 -12 14 3 -11 54 0 0.04 -108 0 0 -12 28 54 20 51 53.1 14 112 61 -12 34 7 -12 23 41 -12 38 55 -12 18 54 0.04 -107 0 0 -12 53 31 20 51 56.9 15 112 59 -12 58 44 -12 48 18 -13 3 30 -12 43 31 0.04 -106 0 0 -13 17 50 20 52 1.0 16 112 58 -13 23 3 -13 12 38 -13 27 49 -13 7 52 0.03 -105 0 0 -13 41 53 20 52 5.3 17 112 57 -13 47 5 -13 36 41 -13 51 51 -13 31 55 0.03 -104 0 0 -14 5 37 20 52 9.9 19 111 56 -14 10 49 -14 0 26 -14 15 34 -13 55 40 0.03 -103 0 0 -14 29 3 20 52 14.7 20 111 55 -14 34 14 -14 23 52 -14 38 59 -14 19 8 0.03 -102 0 0 -14 52 11 20 52 19.8 21 111 54 -14 57 21 -14 47 0 -15 2 5 -14 42 16 0.03 -101 0 0 -15 14 58 20 52 25.1 22 111 53 -15 20 8 -15 9 49 -15 24 52 -15 5 5 0.03 -100 0 0 -15 37 27 20 52 30.6 23 110 52 -15 42 36 -15 32 17 -15 47 19 -15 27 34 0.03 - 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4 18 57 - 4 8 16 - 4 23 51 - 4 3 22 0.04 32 0 0 - 3 44 40 21 16 51.1 23 245 -82 - 3 50 1 - 3 39 20 - 3 54 55 - 3 34 26 0.04 33 0 0 - 3 15 40 21 16 57.0 22 245 -83 - 3 21 1 - 3 10 20 - 3 25 55 - 3 5 26 0.04 34 0 0 - 2 46 37 21 17 2.7 21 245 -84 - 2 51 58 - 2 41 17 - 2 56 52 - 2 36 23 0.04 35 0 0 - 2 17 33 21 17 8.0 20 245 -86 - 2 22 54 - 2 12 12 - 2 27 48 - 2 7 18 0.04 36 0 0 - 1 48 27 21 17 13.1 18 245 -87 - 1 53 48 - 1 43 6 - 1 58 42 - 1 38 12 0.04 37 0 0 - 1 19 21 21 17 17.9 17 245 -88 - 1 24 41 - 1 14 0 - 1 29 35 - 1 9 6 0.04 38 0 0 - 0 50 15 21 17 22.4 16 245 -89 - 0 55 36 - 0 44 54 - 1 0 30 - 0 40 0 0.04 39 0 0 - 0 21 10 21 17 26.5 15 245 -90 - 0 26 31 - 0 15 50 - 0 31 25 - 0 10 56 0.04 40 0 0 0 7 52 21 17 30.4 14 245 -89 0 2 31 0 13 13 - 0 2 23 0 18 6 0.04 41 0 0 0 36 51 21 17 34.0 13 245 -88 0 31 31 0 42 12 0 26 37 0 47 6 0.04 42 0 0 1 5 47 21 17 37.3 12 245 -87 1 0 26 1 11 7 0 55 33 1 16 1 0.05 43 0 0 1 34 38 21 17 40.2 11 245 -85 1 29 18 1 39 58 1 24 24 1 44 52 0.05 44 0 0 2 3 24 21 17 42.9 9 245 -84 1 58 4 2 8 44 1 53 10 2 13 37 0.05 45 0 0 2 32 4 21 17 45.3 8 245 -83 2 26 44 2 37 23 2 21 51 2 42 17 0.05 46 0 0 3 0 37 21 17 47.3 7 245 -82 2 55 17 3 5 56 2 50 24 3 10 49 0.05 47 0 0 3 29 2 21 17 49.1 6 245 -81 3 23 43 3 34 21 3 18 50 3 39 14 0.06 48 0 0 3 57 19 21 17 50.6 5 245 -80 3 52 0 4 2 38 3 47 8 4 7 31 0.06 49 0 0 4 25 28 21 17 51.8 4 245 -79 4 20 9 4 30 46 4 15 16 4 35 39 0.07 50 0 0 4 53 26 21 17 52.6 3 245 -78 4 48 8 4 58 45 4 43 16 5 3 37 0.09 51 0 0 5 21 15 21 17 53.2 2 245 -77 5 15 57 5 26 33 5 11 5 5 31 25 0.13 52 0 0 5 48 52 21 17 53.5 1 245 -75 5 43 34 5 54 10 5 38 43 5 59 1 0.32 Uncertainty in time = +/- 6 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 328-183609 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 02 19.6962 DE: -24 26 12.446 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 02 19.6962 DE: -24 26 12.446 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 12.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3597) Kakkuri asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.57420 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.024", 0.004", 87.04° remarks: * orbital elements for (3597)Kakkuri : Mean anomaly = 296.1178387778 deg Arg. of pericenter = 302.2867879450 deg Long. of node = 86.1364673413 deg Inclination = 2.5174862406 deg Eccentricity = 0.1914197158 Semimajor axis = 3.1592561975 AU Perihelion dist = 2.5545122741 AU Mag: H = 12.02, G = 0.15 Epoch of elements : MJD 60574.87825375 TDT (2024 Sep 21.8783) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,2.20,2024,9,21,21.078102,0.000668,-0.006358,4.508752,0.550983,0.005488,0.000649,0.000000,0.000000 -31.4400,-24.4020,-137.98,0.25,False UCAC4 328-183609,19.03880453,-24.4367904,12.04,11.17,10.70,0.1,0,,19.06400964,-24.4020282,6.24,6.26,0,0,0 3597,Kakkuri,17.41,17.745,2.5742,0,0,1.128,1.89,,1.8,0 0,295.9637,2024,9,21,302.2868,86.1365,2.5175,0.19142,3.15926,2.55451,12.01,5.0,0.15 1.458,0.0243,0.0040,87,0.0043,Known errors,1.05,0,-1,-1 20240921_183609,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org