IOTA/IOTA-ES occultation update for (320) Katharina / HIP 64356 event on 2024 Dec 22, 21:03 UT Visible from Summary ------- On 2024 Dec 22 UT, the 24.4682088218325 km diameter asteroid (320) Katharina will occult a 8.7 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.39 mag to 17.10 mag (the magnitude of the asteroid) for at most 0.990 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: 98 * date and approx. time of event: 2024 Dec 22, 20:59 - 2024 Dec 22, 21:07 * geocentric midpoint of event [JD]: 2460667.37751742 * magnitude of target star: 8.71 * magnitude drop [mag]: 8.39 * estimated maximum duration [s]: 0.990 * Moon: 50 % sunlit, 21° distance * Sun: 70° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.003", 106°) * approx speed of asteroid's shadow [km/s]: 24.8685 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 64356 by 320 Katharina on 2024 Dec 22 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 64 0 0 7 13 24 20 59 30.4 1 103 -65 7 6 15 7 20 33 7 1 12 7 25 36 .... 65 0 0 6 58 42 20 59 30.5 2 103 -65 6 51 32 7 5 51 6 46 29 7 10 55 0.24 66 0 0 6 43 33 20 59 30.7 3 104 -64 6 36 22 6 50 43 6 31 18 6 55 47 0.25 67 0 0 6 27 57 20 59 31.0 4 104 -63 6 20 46 6 35 8 6 15 41 6 40 12 0.26 68 0 0 6 11 54 20 59 31.4 5 104 -62 6 4 42 6 19 6 5 59 36 6 24 11 0.26 69 0 0 5 55 24 20 59 31.9 6 104 -61 5 48 12 6 2 37 5 43 6 6 7 43 0.26 70 0 0 5 38 28 20 59 32.4 7 104 -60 5 31 15 5 45 42 5 26 8 5 50 48 0.26 71 0 0 5 21 6 20 59 33.0 8 104 -59 5 13 52 5 28 20 5 8 44 5 33 27 0.27 72 0 0 5 3 18 20 59 33.7 9 104 -58 4 56 2 5 10 33 4 50 54 5 15 40 0.27 73 0 0 4 45 3 20 59 34.6 10 104 -57 4 37 47 4 52 19 4 32 38 4 57 27 0.27 74 0 0 4 26 23 20 59 35.5 11 104 -56 4 19 6 4 33 40 4 13 56 4 38 48 0.27 75 0 0 4 7 17 20 59 36.4 12 104 -55 3 59 59 4 14 34 3 54 49 4 19 44 0.27 76 0 0 3 47 45 20 59 37.5 13 104 -54 3 40 26 3 55 4 3 35 16 4 0 14 0.27 77 0 0 3 27 49 20 59 38.7 14 104 -53 3 20 29 3 35 8 3 15 18 3 40 19 0.27 78 0 0 3 7 27 20 59 40.0 15 105 -52 3 0 6 3 14 48 2 54 55 3 19 59 0.27 79 0 0 2 46 41 20 59 41.3 16 105 -51 2 39 19 2 54 2 2 34 7 2 59 14 0.27 80 0 0 2 25 30 20 59 42.7 18 105 -50 2 18 8 2 32 53 2 12 55 2 38 5 0.27 81 0 0 2 3 56 20 59 44.3 19 105 -49 1 56 32 2 11 19 1 51 18 2 16 32 0.27 82 0 0 1 41 57 20 59 45.9 20 105 -48 1 34 33 1 49 21 1 29 18 1 54 35 0.27 83 0 0 1 19 35 20 59 47.6 21 105 -47 1 12 10 1 27 1 1 6 55 1 32 15 0.27 84 0 0 0 56 50 20 59 49.4 22 105 -46 0 49 24 1 4 17 0 44 9 1 9 32 0.27 85 0 0 0 33 43 20 59 51.3 23 105 -45 0 26 16 0 41 10 0 20 59 0 46 26 0.27 86 0 0 0 10 13 20 59 53.3 24 104 -44 0 2 45 0 17 41 - 0 2 32 0 22 57 0.27 87 0 0 - 0 13 39 20 59 55.4 25 104 -43 - 0 21 8 - 0 6 10 - 0 26 26 - 0 0 53 0.27 88 0 0 - 0 37 52 20 59 57.6 26 104 -42 - 0 45 22 - 0 30 22 - 0 50 40 - 0 25 5 0.27 89 0 0 - 1 2 26 20 59 59.8 27 104 -41 - 1 9 57 - 0 54 56 - 1 15 16 - 0 49 37 0.27 90 0 0 - 1 27 21 21 0 2.2 28 104 -39 - 1 34 53 - 1 19 50 - 1 40 13 - 1 14 31 0.27 91 0 0 - 1 52 36 21 0 4.6 29 104 -38 - 2 0 9 - 1 45 4 - 2 5 29 - 1 39 44 0.27 92 0 0 - 2 18 10 21 0 7.1 30 104 -37 - 2 25 44 - 2 10 37 - 2 31 5 - 2 5 17 0.27 93 0 0 - 2 44 4 21 0 9.7 32 104 -36 - 2 51 38 - 2 36 30 - 2 57 0 - 2 31 9 0.27 94 0 0 - 3 10 15 21 0 12.4 33 104 -35 - 3 17 51 - 3 2 40 - 3 23 13 - 2 57 19 0.27 95 0 0 - 3 36 45 21 0 15.2 34 103 -34 - 3 44 21 - 3 29 9 - 3 49 44 - 3 23 47 0.27 96 0 0 - 4 3 32 21 0 18.1 35 103 -33 - 4 11 9 - 3 55 55 - 4 16 32 - 3 50 32 0.27 97 0 0 - 4 30 35 21 0 21.1 36 103 -32 - 4 38 13 - 4 22 58 - 4 43 37 - 4 17 34 0.27 98 0 0 - 4 57 55 21 0 24.1 37 103 -31 - 5 5 33 - 4 50 16 - 5 10 58 - 4 44 52 0.27 99 0 0 - 5 25 29 21 0 27.2 38 102 -30 - 5 33 9 - 5 17 50 - 5 38 34 - 5 12 26 0.27 100 0 0 - 5 53 19 21 0 30.4 39 102 -29 - 6 0 59 - 5 45 39 - 6 6 24 - 5 40 14 0.27 101 0 0 - 6 21 22 21 0 33.7 40 102 -27 - 6 29 3 - 6 13 41 - 6 34 29 - 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-111 0 0 -36 25 25 21 7 45.8 0 254 64 -36 32 38 -36 18 12 -36 37 45 -36 13 6 1.70 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: HIP 64356 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 11 28.9779 DE: -13 00 00.756 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 11 28.9785 DE: -13 00 00.759 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.7 * B mag [mag]: 9.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (320) Katharina asteroid class: approx. diameter [km]: 24 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.56820 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.010", 0.003", 106.057° remarks: * orbital elements for (320)Katharina : Mean anomaly = 175.9944673197 deg Arg. of pericenter = 148.4737498987 deg Long. of node = 219.7659580267 deg Inclination = 9.3892818803 deg Eccentricity = 0.1156404724 Semimajor axis = 3.0110368624 AU Perihelion dist = 2.6628391372 AU Mag: H = 10.84, G = 0.15 Epoch of elements : MJD 60666.87751758 TDT (2024 Dec 22.8775) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,0.99,2024,12,22,21.060418,-0.100697,-0.236035,12.973097,-5.359294,-0.005330,0.001984,-0.000001,0.000000 150.3842,-13.1319,-136.16,-23.43,False HIP 64356,13.19138273,-13.0002099,8.98,8.71,8.56,0.1,0,,13.21322489,-13.1319208,8.39,8.09,0,0,0 320,Katharina,17.10,24.727,3.5682,0,0,2.189,-13.21,,1.4,0 0,175.8289,2024,12,22,148.4737,219.7660,9.3893,0.11564,3.01104,2.66284,10.84,5.0,0.15 1.353,0.0097,0.0032,106,0.0034,Known errors,1.05,0,-1,-1 20241222__64356,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org