IOTA/IOTA-ES occultation update for (786) Bredichina / UCAC4 300-227811 event on 2022 Oct 06, 21:52 UT Visible from South America Summary ------- On 2022 Oct 06 UT, the 106.8 km diameter asteroid (786) Bredichina will occult a 10.6 mag star in the constellation Sagittarius for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.11 mag to 14.68 mag (the magnitude of the asteroid) for at most 5.140 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: 2022 Oct 06, 21:47 - 2022 Oct 06, 21:57 * geocentric midpoint of event [JD]: 2459859.41128296 * magnitude of target star: 10.60 * magnitude drop [mag]: 4.11 * estimated maximum duration [s]: 5.140 * Moon: 89 % sunlit, 58° distance * Sun: 84° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 109 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 105°) * approx speed of asteroid's shadow [km/s]: 20.7791 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 300-227811 by 786 Bredichina on 2022 Oct 6 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 -147 0 0 9 59 49 21 47 13.7 1 121 74 9 25 30 10 34 13 9 18 22 10 41 23 .... -146 0 0 9 24 42 21 47 13.9 2 121 75 8 50 24 9 59 4 8 43 16 10 6 14 -0.07 -145 0 0 8 49 37 21 47 14.2 3 121 75 8 15 21 9 23 58 8 8 14 9 31 8 -0.12 -144 0 0 8 14 37 21 47 14.6 4 121 75 7 40 22 8 48 56 7 33 15 8 56 5 -0.14 -143 0 0 7 39 41 21 47 15.2 6 121 75 7 5 29 8 13 58 6 58 22 8 21 7 -0.15 -142 0 0 7 4 51 21 47 15.8 7 122 75 6 30 41 7 39 6 6 23 35 7 46 14 -0.16 -141 0 0 6 30 8 21 47 16.6 8 122 75 5 56 0 7 4 20 5 48 55 7 11 28 -0.17 -140 0 0 5 55 33 21 47 17.6 9 122 75 5 21 28 6 29 43 5 14 23 6 36 50 -0.17 -139 0 0 5 21 7 21 47 18.6 10 122 75 4 47 5 5 55 14 4 40 0 6 2 21 -0.18 -138 0 0 4 46 51 21 47 19.8 11 122 74 4 12 52 5 20 55 4 5 48 5 28 1 -0.18 -137 0 0 4 12 47 21 47 21.1 13 122 74 3 38 51 4 46 48 3 31 48 4 53 53 -0.18 -136 0 0 3 38 55 21 47 22.5 14 122 74 3 5 2 4 12 52 2 58 0 4 19 57 -0.19 -135 0 0 3 5 16 21 47 24.1 15 122 73 2 31 27 3 39 10 2 24 25 3 46 14 -0.19 -134 0 0 2 31 51 21 47 25.8 16 122 72 1 58 6 3 5 41 1 51 5 3 12 44 -0.19 -133 0 0 1 58 41 21 47 27.5 17 122 72 1 25 0 2 32 28 1 18 0 2 39 30 -0.19 -132 0 0 1 25 48 21 47 29.5 18 122 71 0 52 10 1 59 30 0 45 11 2 6 32 -0.19 -131 0 0 0 53 12 21 47 31.5 19 122 70 0 19 38 1 26 50 0 12 39 1 33 50 -0.19 -130 0 0 0 20 53 21 47 33.6 21 122 69 - 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33 0 0 -13 6 57 21 54 56.5 55 235 -26 -13 37 49 -12 36 1 -13 44 15 -12 29 34 -0.21 - 32 0 0 -12 49 6 21 55 1.1 54 236 -27 -13 20 3 -12 18 6 -13 26 29 -12 11 38 -0.21 - 31 0 0 -12 30 43 21 55 5.7 53 236 -28 -13 1 45 -11 59 38 -13 8 12 -11 53 9 -0.21 - 30 0 0 -12 11 48 21 55 10.2 52 236 -30 -12 42 54 -11 40 39 -12 49 22 -11 34 9 -0.21 - 29 0 0 -11 52 22 21 55 14.7 51 236 -31 -12 23 32 -11 21 7 -12 30 1 -11 14 36 -0.21 - 28 0 0 -11 32 23 21 55 19.2 50 236 -32 -12 3 39 -11 1 4 -12 10 9 -10 54 32 -0.21 - 27 0 0 -11 11 54 21 55 23.6 49 236 -33 -11 43 14 -10 40 29 -11 49 45 -10 33 56 -0.21 - 26 0 0 -10 50 52 21 55 28.0 48 237 -34 -11 22 18 -10 19 23 -11 28 50 -10 12 49 -0.21 - 25 0 0 -10 29 20 21 55 32.3 47 237 -35 -11 0 50 - 9 57 46 -11 7 23 - 9 51 11 -0.21 - 24 0 0 -10 7 16 21 55 36.5 46 237 -36 -10 38 52 - 9 35 37 -10 45 26 - 9 29 1 -0.21 - 23 0 0 - 9 44 42 21 55 40.7 45 237 -37 -10 16 23 - 9 12 58 -10 22 58 - 9 6 21 -0.21 - 22 0 0 - 9 21 38 21 55 44.8 44 237 -38 - 9 53 23 - 8 49 48 - 9 59 59 - 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1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.017", 0.003", 105.029° remarks: * orbital elements for (786)Bredichina : Mean anomaly = 57.0371515839 deg Arg. of pericenter = 133.7177234028 deg Long. of node = 89.7528424246 deg Inclination = 14.5181069701 deg Eccentricity = 0.1591719850 Semimajor axis = 3.1746965806 AU Perihelion dist = 2.6693738242 AU Mag: H = 9.02, G = 0.15 Epoch of elements : MJD 59858.91131944 TDT (2022 Oct 06.9113) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542022Aug03,5.14,2022,10,6,21.870791,0.003465,0.212599,11.728257,0.035456,0.005726,0.000256,0.000000,0.000000 -65.2881,-30.0553,-151.06,-5.38,False UCAC4 300-227811,18.52994229,-30.0703747,0.00,10.60,0.00,0.0,0,,18.55392134,-30.0553114,4.10,0.00,0,0,0 786,Bredichina,14.68,106.8,2.9024,0,0,2.737,0.11,,5.4,0 0,56.8784,2022,10,6,133.7177,89.7528,14.5181,0.15917,3.17470,2.66937,9.02,5.0,0.15 1.104,0.0173,0.0028,105,0.0053,Known errors,-1.00,-1,-1,-1 20221006_227811,59811.11 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 20, 02:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org