IOTA/IOTA-ES occultation update for (3319) Kibi / UCAC4 350-171275 event on 2024 Oct 12, 23:35 UT Visible from Summary ------- On 2024 Oct 12 UT, the 18.948 km diameter asteroid (3319) Kibi will occult a 11.9 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 6.00 mag to 17.86 mag (the magnitude of the asteroid) for at most 1.070 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 Oct 12, 23:30 - 2024 Oct 12, 23:40 * geocentric midpoint of event [JD]: 2460596.48300275 * magnitude of target star: 11.86 * magnitude drop [mag]: 6.00 * estimated maximum duration [s]: 1.070 * Moon: 73 % sunlit, 31° distance * Sun: 86° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.002", 79°) * approx speed of asteroid's shadow [km/s]: 17.7397 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 350-171275 by 3319 Kibi on 2024 Oct 12 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 170 0 0 -32 17 3 23 30 13.0 0 114 62 -32 23 25 -32 10 41 -32 27 33 -32 6 34 .... 171 0 0 -32 39 38 23 30 13.1 1 113 62 -32 46 0 -32 33 17 -32 50 8 -32 29 10 0.45 172 0 0 -33 2 5 23 30 13.3 2 113 63 -33 8 27 -32 55 43 -33 12 34 -32 51 36 0.49 173 0 0 -33 24 22 23 30 13.6 3 112 63 -33 30 44 -33 18 1 -33 34 52 -33 13 54 0.50 174 0 0 -33 46 30 23 30 14.0 4 112 63 -33 52 52 -33 40 9 -33 56 59 -33 36 3 0.51 175 0 0 -34 8 28 23 30 14.5 5 111 63 -34 14 50 -34 2 8 -34 18 57 -33 58 1 0.52 176 0 0 -34 30 16 23 30 15.1 6 111 62 -34 36 37 -34 23 55 -34 40 44 -34 19 49 0.52 177 0 0 -34 51 52 23 30 15.8 7 110 62 -34 58 13 -34 45 32 -35 2 20 -34 41 26 0.52 178 0 0 -35 13 18 23 30 16.5 7 109 62 -35 19 38 -35 6 58 -35 23 45 -35 2 52 0.52 179 0 0 -35 34 31 23 30 17.4 8 109 62 -35 40 51 -35 28 11 -35 44 57 -35 24 6 0.52 -180 0 0 -35 55 32 23 30 18.4 9 108 62 -36 1 52 -35 49 13 -36 5 58 -35 45 7 0.52 -179 0 0 -36 16 21 23 30 19.4 10 108 62 -36 22 40 -36 10 2 -36 26 46 -36 5 57 0.52 -178 0 0 -36 36 56 23 30 20.6 11 107 61 -36 43 15 -36 30 38 -36 47 21 -36 26 33 0.52 -177 0 0 -36 57 19 23 30 21.8 12 106 61 -37 3 37 -36 51 1 -37 7 43 -36 46 56 0.53 -176 0 0 -37 17 27 23 30 23.1 13 106 61 -37 23 45 -37 11 10 -37 27 51 -37 7 5 0.53 -175 0 0 -37 37 22 23 30 24.5 14 105 60 -37 43 40 -37 31 5 -37 47 44 -37 27 1 0.53 -174 0 0 -37 57 2 23 30 26.0 14 104 60 -38 3 19 -37 50 46 -38 7 24 -37 46 42 0.53 -173 0 0 -38 16 28 23 30 27.6 15 104 60 -38 22 45 -38 10 12 -38 26 49 -38 6 8 0.53 -172 0 0 -38 35 39 23 30 29.2 16 103 59 -38 41 55 -38 29 23 -38 45 59 -38 25 20 0.53 -171 0 0 -38 54 35 23 30 30.9 17 102 59 -39 0 50 -38 48 19 -39 4 54 -38 44 16 0.53 -170 0 0 -39 13 15 23 30 32.7 18 102 58 -39 19 30 -39 7 0 -39 23 33 -39 2 57 0.53 -169 0 0 -39 31 39 23 30 34.6 19 101 58 -39 37 54 -39 25 25 -39 41 57 -39 21 23 0.53 -168 0 0 -39 49 48 23 30 36.5 19 100 57 -39 56 2 -39 43 34 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-22 17 55 -22 5 18 -22 22 1 -22 1 13 0.59 2 0 0 -21 48 19 23 40 47.7 6 251 -60 -21 54 38 -21 42 1 -21 58 43 -21 37 56 0.60 3 0 0 -21 25 10 23 40 48.4 5 250 -61 -21 31 28 -21 18 52 -21 35 33 -21 14 48 0.62 4 0 0 -21 2 9 23 40 49.0 4 250 -61 -21 8 26 -20 55 52 -21 12 31 -20 51 48 0.64 5 0 0 -20 39 17 23 40 49.4 3 250 -61 -20 45 34 -20 33 0 -20 49 38 -20 28 56 0.68 6 0 0 -20 16 34 23 40 49.7 2 249 -62 -20 22 51 -20 10 18 -20 26 55 -20 6 14 0.76 7 0 0 -19 54 1 23 40 49.9 1 249 -62 -20 0 17 -19 47 46 -20 4 21 -19 43 43 1.02 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 350-171275 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 09 07.6862 DE: -20 09 13.944 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 09 07.6861 DE: -20 09 13.944 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3319) Kibi asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.94510 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): 0.022", 0.002", 79.011° remarks: * orbital elements for (3319)Kibi : Mean anomaly = 292.6681913482 deg Arg. of pericenter = 119.9907624911 deg Long. of node = 269.6648551018 deg Inclination = 3.8391349594 deg Eccentricity = 0.1511638152 Semimajor axis = 3.1679639127 AU Perihelion dist = 2.6890824013 AU Mag: H = 12.12, G = 0.15 Epoch of elements : MJD 60595.98300271 TDT (2024 Oct 12.9830) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.07,2024,10,12,23.592066,0.054970,-0.459618,9.942382,1.185404,0.005765,0.000719,0.000000,0.000000 -88.2645,-20.1149,-177.32,-7.87,False UCAC4 350-171275,19.15213508,-20.1538733,12.18,11.86,11.69,0.0,0,K,19.17645612,-20.1148953,6.00,5.72,0,0,0 3319,Kibi,17.86,18.948,2.9451,0,0,2.108,3.54,,1.8,0 0,292.4964,2024,10,12,119.9908,269.6649,3.8391,0.15116,3.16796,2.68908,12.12,5.0,0.15 1.324,0.0220,0.0024,79,0.0029,Known errors,0.77,0,-1,-1 20241012_171275,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org