IOTA/IOTA-ES occultation update for (3597) Kakkuri / UCAC4 331-194819 event on 2024 Jul 23, 05:10 UT Visible from Summary ------- On 2024 Jul 23 UT, the 17.654 km diameter asteroid (3597) Kakkuri will occult a 12.0 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 4.54 mag to 16.48 mag (the magnitude of the asteroid) for at most 1.450 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: 93 * date and approx. time of event: 2024 Jul 23, 05:01 - 2024 Jul 23, 05:19 * geocentric midpoint of event [JD]: 2460514.71543829 * magnitude of target star: 11.96 * magnitude drop [mag]: 4.54 * estimated maximum duration [s]: 1.450 * Moon: 96 % sunlit, 36° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.47 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.032, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.005", 85°) * approx speed of asteroid's shadow [km/s]: 12.1446 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 331-194819 by 3597 Kakkuri on 2024 Jul 23 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 179 0 0 - 0 39 13 5 18 51.3 1 114 12 - 0 33 53 - 0 44 32 - 0 28 51 - 0 49 33 .... -180 0 0 - 1 5 35 5 18 51.1 2 114 11 - 1 0 16 - 1 10 54 - 0 55 15 - 1 15 55 -0.04 -179 0 0 - 1 31 41 5 18 50.7 3 114 10 - 1 26 22 - 1 36 59 - 1 21 22 - 1 41 59 -0.10 -178 0 0 - 1 57 29 5 18 50.2 4 114 9 - 1 52 11 - 2 2 46 - 1 47 11 - 2 7 46 -0.13 -177 0 0 - 2 22 59 5 18 49.4 5 114 8 - 2 17 41 - 2 28 16 - 2 12 42 - 2 33 15 -0.14 -176 0 0 - 2 48 10 5 18 48.4 6 114 6 - 2 42 53 - 2 53 26 - 2 37 54 - 2 58 25 -0.15 -175 0 0 - 3 13 2 5 18 47.3 7 114 5 - 3 7 46 - 3 18 18 - 3 2 48 - 3 23 16 -0.15 -174 0 0 - 3 37 35 5 18 45.9 8 114 4 - 3 32 19 - 3 42 50 - 3 27 22 - 3 47 48 -0.16 -173 0 0 - 4 1 48 5 18 44.4 9 114 3 - 3 56 33 - 4 7 2 - 3 51 35 - 4 11 59 -0.16 -172 0 0 - 4 25 40 5 18 42.7 10 113 2 - 4 20 26 - 4 30 54 - 4 15 29 - 4 35 51 -0.17 -171 0 0 - 4 49 12 5 18 40.9 11 113 1 - 4 43 58 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31 26 2 47 12 2 26 23 -0.18 - 38 0 0 3 4 16 5 3 12.7 35 238 -48 3 9 38 2 58 55 3 14 41 2 53 51 -0.19 - 37 0 0 3 31 56 5 3 7.0 34 238 -47 3 37 17 3 26 34 3 42 21 3 21 30 -0.19 - 36 0 0 3 59 45 5 3 1.5 33 238 -46 4 5 7 3 54 23 4 10 11 3 49 19 -0.19 - 35 0 0 4 27 43 5 2 56.1 32 238 -44 4 33 6 4 22 21 4 38 10 4 17 16 -0.19 - 34 0 0 4 55 50 5 2 50.9 31 239 -43 5 1 13 4 50 27 5 6 18 4 45 22 -0.19 - 33 0 0 5 24 4 5 2 45.9 30 239 -42 5 29 28 5 18 41 5 34 33 5 13 36 -0.19 - 32 0 0 5 52 26 5 2 41.0 28 239 -41 5 57 50 5 47 3 6 2 55 5 41 58 -0.19 - 31 0 0 6 20 54 5 2 36.3 27 239 -40 6 26 18 6 15 31 6 31 24 6 10 25 -0.19 - 30 0 0 6 49 28 5 2 31.8 26 239 -39 6 54 52 6 44 4 6 59 58 6 38 59 -0.19 - 29 0 0 7 18 7 5 2 27.4 25 239 -38 7 23 31 7 12 43 7 28 37 7 7 37 -0.19 - 28 0 0 7 46 50 5 2 23.2 24 239 -37 7 52 15 7 41 26 7 57 21 7 36 20 -0.19 - 27 0 0 8 15 37 5 2 19.1 23 240 -36 8 21 1 8 10 12 8 26 8 8 5 6 -0.19 - 26 0 0 8 44 26 5 2 15.3 22 240 -35 8 49 51 8 39 1 8 54 58 8 33 55 -0.19 - 25 0 0 9 13 18 5 2 11.6 21 240 -34 9 18 43 9 7 53 9 23 50 9 2 46 -0.19 - 24 0 0 9 42 10 5 2 8.1 20 240 -33 9 47 36 9 36 45 9 52 43 9 31 39 -0.19 - 23 0 0 10 11 4 5 2 4.8 19 240 -32 10 16 29 10 5 39 10 21 36 10 0 32 -0.19 - 22 0 0 10 39 57 5 2 1.6 18 241 -31 10 45 22 10 34 32 10 50 29 10 29 25 -0.19 - 21 0 0 11 8 49 5 1 58.7 17 241 -29 11 14 14 11 3 24 11 19 22 10 58 17 -0.19 - 20 0 0 11 37 39 5 1 55.9 16 241 -28 11 43 5 11 32 14 11 48 12 11 27 7 -0.19 - 19 0 0 12 6 27 5 1 53.3 14 241 -27 12 11 53 12 1 2 12 17 0 11 55 55 -0.19 - 18 0 0 12 35 12 5 1 50.9 13 241 -26 12 40 37 12 29 47 12 45 45 12 24 40 -0.19 - 17 0 0 13 3 53 5 1 48.7 12 242 -25 13 9 18 12 58 28 13 14 25 12 53 21 -0.19 - 16 0 0 13 32 29 5 1 46.7 11 242 -24 13 37 54 13 27 4 13 43 1 13 21 57 -0.18 - 15 0 0 14 0 59 5 1 44.8 10 242 -23 14 6 24 13 55 34 14 11 31 13 50 27 -0.18 - 14 0 0 14 29 23 5 1 43.2 9 242 -22 14 34 48 14 23 58 14 39 55 14 18 52 -0.18 - 13 0 0 14 57 41 5 1 41.7 8 243 -21 15 3 6 14 52 16 15 8 12 14 47 9 -0.18 - 12 0 0 15 25 50 5 1 40.4 7 243 -20 15 31 15 15 20 26 15 36 22 15 15 19 -0.18 - 11 0 0 15 53 52 5 1 39.3 6 243 -19 15 59 16 15 48 27 16 4 23 15 43 21 -0.18 - 10 0 0 16 21 44 5 1 38.4 5 243 -18 16 27 8 16 16 20 16 32 14 16 11 14 -0.18 - 9 0 0 16 49 26 5 1 37.7 4 244 -17 16 54 50 16 44 2 16 59 56 16 38 56 -0.18 - 8 0 0 17 16 58 5 1 37.1 3 244 -16 17 22 22 17 11 34 17 27 28 17 6 29 -0.17 - 7 0 0 17 44 19 5 1 36.8 2 244 -14 17 49 42 17 38 55 17 54 48 17 33 50 -0.16 - 6 0 0 18 11 28 5 1 36.6 1 245 -13 18 16 51 18 6 5 18 21 56 18 1 0 -0.10 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 331-194819 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 17 37.4233 DE: -23 51 57.339 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 17 37.4233 DE: -23 51 57.339 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3597) Kakkuri asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.012 distance from Earth [AU]: 2.11300 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): 0.032", 0.005", 84.884° remarks: * orbital elements for (3597)Kakkuri : Mean anomaly = 285.4889495259 deg Arg. of pericenter = 302.2697229402 deg Long. of node = 86.1362577169 deg Inclination = 2.5174714668 deg Eccentricity = 0.1914347453 Semimajor axis = 3.1594569036 AU Perihelion dist = 2.5546270761 AU Mag: H = 12.02, G = 0.15 Epoch of elements : MJD 60514.21543870 TDT (2024 Jul 23.2154) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.45,2024,7,23,5.170519,-0.030411,0.167904,-6.744960,-1.221946,0.001195,0.000320,0.000001,0.000000 -89.2111,-23.8217,104.08,19.97,False UCAC4 331-194819,19.29372871,-23.8659274,12.58,11.96,11.63,0.0,0,,19.31888611,-23.8217322,4.53,4.42,0,0,0 3597,Kakkuri,16.48,17.654,2.1130,0,0,-2.045,-5.09,,1.8,0 0,285.4511,2024,7,23,302.2697,86.1363,2.5175,0.19143,3.15946,2.55463,12.01,5.0,0.15 1.472,0.0317,0.0047,85,0.0055,Known errors,1.02,0,-1,-1 20240723_194819,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org