IOTA/IOTA-ES occultation update for (943) Begonia / TYC 6284-01386-1 event on 2023 Jun 24, 15:32 UT Visible from Australia Summary ------- On 2023 Jun 24 UT, the 67.1 km diameter asteroid (943) Begonia will occult a 10.8 mag star in the constellation Sagittarius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.37 mag to 15.12 mag (the magnitude of the asteroid) for at most 4.260 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: 2023 Jun 24, 15:25 - 2023 Jun 24, 15:39 * geocentric midpoint of event [JD]: 2460120.14765179 * magnitude of target star: 10.77 * magnitude drop [mag]: 4.37 * estimated maximum duration [s]: 4.260 * Moon: 34 % sunlit, 116° distance * Sun: 170° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 70 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.002", 99°) * approx speed of asteroid's shadow [km/s]: 15.7382 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6284-01386-1 by 943 Begonia on 2023 Jun 24 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 35 0 0 -28 9 25 15 39 7.3 0 111 -10 -27 49 16 -28 29 35 -27 39 33 -28 39 20 .... 36 0 0 -28 29 44 15 39 7.2 1 110 -11 -28 9 37 -28 49 54 -27 59 56 -28 59 37 0.27 37 0 0 -28 49 46 15 39 6.9 2 110 -12 -28 29 41 -29 9 54 -28 20 0 -29 19 37 0.27 38 0 0 -29 9 30 15 39 6.6 3 109 -13 -28 49 27 -29 29 35 -28 39 47 -29 39 18 0.27 39 0 0 -29 28 55 15 39 6.1 4 109 -14 -29 8 54 -29 48 59 -28 59 15 -29 58 40 0.27 40 0 0 -29 48 2 15 39 5.6 5 108 -15 -29 28 2 -30 8 3 -29 18 24 -30 17 44 0.27 41 0 0 -30 6 49 15 39 4.9 6 108 -16 -29 46 51 -30 26 49 -29 37 14 -30 36 29 0.27 42 0 0 -30 25 18 15 39 4.1 7 107 -17 -30 5 22 -30 45 16 -29 55 46 -30 54 55 0.27 43 0 0 -30 43 28 15 39 3.3 8 107 -17 -30 23 33 -31 3 24 -30 13 58 -31 13 1 0.27 44 0 0 -31 1 18 15 39 2.3 9 106 -18 -30 41 26 -31 21 12 -30 31 51 -31 30 49 0.27 45 0 0 -31 18 49 15 39 1.2 10 106 -19 -30 58 58 -31 38 41 -30 49 25 -31 48 17 0.27 46 0 0 -31 36 0 15 39 0.0 11 105 -20 -31 16 12 -31 55 50 -31 6 39 -32 5 25 0.27 47 0 0 -31 52 52 15 38 58.8 11 105 -21 -31 33 5 -32 12 40 -31 23 34 -32 22 14 0.27 48 0 0 -32 9 24 15 38 57.4 12 104 -22 -31 49 39 -32 29 10 -31 40 8 -32 38 43 0.27 49 0 0 -32 25 36 15 38 56.0 13 104 -23 -32 5 53 -32 45 21 -31 56 23 -32 54 53 0.27 50 0 0 -32 41 28 15 38 54.5 14 103 -24 -32 21 47 -33 1 11 -32 12 18 -33 10 42 0.27 51 0 0 -32 57 0 15 38 52.8 15 103 -25 -32 37 21 -33 16 41 -32 27 53 -33 26 12 0.27 52 0 0 -33 12 13 15 38 51.1 16 102 -25 -32 52 36 -33 31 52 -32 43 8 -33 41 21 0.27 53 0 0 -33 27 5 15 38 49.3 17 102 -26 -33 7 30 -33 46 42 -32 58 3 -33 56 11 0.27 54 0 0 -33 41 37 15 38 47.5 18 101 -27 -33 22 3 -34 1 12 -33 12 38 -34 10 40 0.27 55 0 0 -33 55 49 15 38 45.5 18 100 -28 -33 36 17 -34 15 22 -33 26 52 -34 24 49 0.27 56 0 0 -34 9 40 15 38 43.5 19 100 -29 -33 50 10 -34 29 12 -33 40 47 -34 38 38 0.27 57 0 0 -34 23 12 15 38 41.4 20 99 -30 -34 3 44 -34 42 42 -33 54 21 -34 52 7 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1 25 40 - 2 24 45 0.44 -132 0 0 - 1 34 33 15 26 6.5 0 251 8 - 1 14 40 - 1 54 28 - 1 5 5 - 2 4 5 0.81 Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6284-01386-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 46 44.8633 DE: -18 38 30.556 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 46 44.8633 DE: -18 38 30.556 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (943) Begonia asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.034 distance from Earth [AU]: 2.71930 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): 0.021", 0.002", 98.733° remarks: * orbital elements for (943)Begonia : Mean anomaly = 151.3577177780 deg Arg. of pericenter = 3.8825671085 deg Long. of node = 113.7484972790 deg Inclination = 12.1101598456 deg Eccentricity = 0.2138821887 Semimajor axis = 3.1153460927 AU Perihelion dist = 2.4490290518 AU Mag: H = 9.80, G = 0.15 Epoch of elements : MJD 60119.64756944 TDT (2023 Jun 24.6476) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,4.26,2023,6,24,15.543643,0.064517,-0.259150,-8.619182,-2.149161,-0.000782,-0.000498,0.000001,0.000000 136.3495,-18.6168,-52.53,23.41,False TYC 6284-01386-1,18.77912870,-18.6418210,0.00,10.77,0.00,0.0,0,,18.80229116,-18.6167628,4.37,0.00,0,0,0 943,Begonia,15.12,67.1,2.7193,0,0,-1.961,-6.95,,3.4,0 0,151.2416,2023,6,24,3.8826,113.7485,12.1102,0.21388,3.11535,2.44903,9.81,5.0,0.15 1.241,0.0207,0.0020,99,0.0082,Known errors,-1.00,-1,-1,-1 20230624_1386-1,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org