IOTA/IOTA-ES occultation update for (786) Bredichina / TYC 6272-00922-1 event on 2022 Mar 10, 08:37 UT Visible from South America Summary ------- On 2022 Mar 10 UT, the 106.8 km diameter asteroid (786) Bredichina will occult a 8.6 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 5.73 mag to 14.35 mag (the magnitude of the asteroid) for at most 4.350 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: 100 * date and approx. time of event: 2022 Mar 10, 08:33 - 2022 Mar 10, 08:41 * geocentric midpoint of event [JD]: 2459648.85937083 * magnitude of target star: 8.63 * magnitude drop [mag]: 5.73 * estimated maximum duration [s]: 4.350 * Moon: 50 % sunlit, 165° distance * Sun: 76° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 107 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.004", 107°) * approx speed of asteroid's shadow [km/s]: 24.5794 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6272-00922-1 by 786 Bredichina on 2022 Mar 10 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 -111 0 0 3 27 8 8 33 10.6 1 109 -75 2 56 27 3 57 49 2 50 25 4 3 51 .... -110 0 0 3 6 12 8 33 10.7 2 109 -74 2 35 30 3 36 54 2 29 28 3 42 56 0.10 -109 0 0 2 45 10 8 33 10.9 3 109 -73 2 14 27 3 15 52 2 8 24 3 21 55 0.07 -108 0 0 2 24 1 8 33 11.2 4 109 -72 1 53 17 2 54 44 1 47 14 3 0 47 0.06 -107 0 0 2 2 47 8 33 11.5 5 109 -71 1 32 2 2 33 31 1 25 59 2 39 33 0.05 -106 0 0 1 41 27 8 33 12.0 6 109 -70 1 10 41 2 12 12 1 4 38 2 18 15 0.05 -105 0 0 1 20 2 8 33 12.5 7 109 -69 0 49 16 1 50 48 0 43 13 1 56 51 0.05 -104 0 0 0 58 33 8 33 13.1 8 109 -68 0 27 46 1 29 19 0 21 43 1 35 23 0.05 -103 0 0 0 37 0 8 33 13.9 9 109 -67 0 6 13 1 7 47 0 0 9 1 13 50 0.04 -102 0 0 0 15 24 8 33 14.7 10 109 -66 - 0 15 24 0 46 11 - 0 21 28 0 52 15 0.04 -101 0 0 - 0 6 15 8 33 15.5 11 109 -65 - 0 37 4 0 24 33 - 0 43 7 0 30 36 0.04 -100 0 0 - 0 27 57 8 33 16.5 12 109 -64 - 0 58 45 0 2 52 - 1 4 49 0 8 55 0.04 - 99 0 0 - 0 49 40 8 33 17.6 13 109 -63 - 1 20 29 - 0 18 52 - 1 26 33 - 0 12 48 0.04 - 98 0 0 - 1 11 25 8 33 18.8 14 109 -62 - 1 42 14 - 0 40 36 - 1 48 18 - 0 34 32 0.04 - 97 0 0 - 1 33 10 8 33 20.0 15 109 -61 - 2 4 0 - 1 2 21 - 2 10 3 - 0 56 18 0.04 - 96 0 0 - 1 54 56 8 33 21.3 17 109 -60 - 2 25 46 - 1 24 7 - 2 31 49 - 1 18 4 0.04 - 95 0 0 - 2 16 42 8 33 22.8 18 109 -59 - 2 47 31 - 1 45 53 - 2 53 35 - 1 39 50 0.04 - 94 0 0 - 2 38 27 8 33 24.3 19 109 -58 - 3 9 16 - 2 7 38 - 3 15 20 - 2 1 35 0.04 - 93 0 0 - 3 0 11 8 33 25.9 20 109 -56 - 3 31 0 - 2 29 22 - 3 37 4 - 2 23 19 0.04 - 92 0 0 - 3 21 53 8 33 27.5 21 109 -55 - 3 52 42 - 2 51 5 - 3 58 46 - 2 45 1 0.04 - 91 0 0 - 3 43 33 8 33 29.3 22 109 -54 - 4 14 22 - 3 12 45 - 4 20 25 - 3 6 42 0.04 - 90 0 0 - 4 5 10 8 33 31.1 23 109 -53 - 4 35 59 - 3 34 23 - 4 42 2 - 3 28 20 0.04 - 89 0 0 - 4 26 45 8 33 33.1 24 109 -52 - 4 57 32 - 3 55 58 - 5 3 36 - 3 49 54 0.04 - 88 0 0 - 4 48 15 8 33 35.1 25 109 -51 - 5 19 2 - 4 17 28 - 5 25 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8 41 47.1 8 252 81 - 9 31 59 - 8 30 53 - 9 37 59 - 8 24 53 0.05 61 0 0 - 8 41 31 8 41 47.7 7 252 80 - 9 12 5 - 8 10 57 - 9 18 6 - 8 4 56 0.05 62 0 0 - 8 21 26 8 41 48.2 6 252 79 - 8 52 2 - 7 50 51 - 8 58 3 - 7 44 50 0.06 63 0 0 - 8 1 13 8 41 48.6 5 251 78 - 8 31 50 - 7 30 37 - 8 37 52 - 7 24 36 0.06 64 0 0 - 7 40 52 8 41 48.9 3 251 78 - 8 11 30 - 7 10 15 - 8 17 32 - 7 4 13 0.07 65 0 0 - 7 20 23 8 41 49.2 2 251 77 - 7 51 2 - 6 49 44 - 7 57 4 - 6 43 43 0.09 66 0 0 - 6 59 46 8 41 49.3 1 251 76 - 7 30 26 - 6 29 7 - 7 36 28 - 6 23 5 0.13 67 0 0 - 6 39 3 8 41 49.4 0 251 75 - 7 9 44 - 6 8 22 - 7 15 46 - 6 2 20 0.47 Uncertainty in time = +/- 1 secs Prediction of 2022 Jan 16.0 Data for the target star ------------------------ * name: TYC 6272-00922-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 12 45.5978 DE: -19 00 30.972 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 12 45.5978 DE: -19 00 30.972 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (786) Bredichina asteroid class: approx. diameter [km]: 107 approx. diameter ["]: 0.053 distance from Earth [AU]: 2.76830 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 date of fit: 2021 Aug 25 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): 0.015", 0.004", 107.1° remarks: * orbital elements for (786)Bredichina : Mean anomaly = 20.3557111147 deg Arg. of pericenter = 133.6991180624 deg Long. of node = 89.7530617369 deg Inclination = 14.5178312597 deg Eccentricity = 0.1593279320 Semimajor axis = 3.1750234328 AU Perihelion dist = 2.6691535151 AU Mag: H = 8.95, G = 0.15 Epoch of elements : MJD 59648.35937500 TDT (2022 Mar 10.3594) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512021Aug25,4.35,2022,3,10,8.6249,-0.004309,-0.026385,13.812802,-1.294042,-0.005656,-0.000037,0.000000,0.000000 -23.8666,-19.0035,53.21,-4.06,False TYC 6272-00922-1,18.21266604,-19.0086034,0.00,8.63,0.00,0.0,4,,18.23408624,-19.0034945,5.73,0.00,0,0,0 786,Bredichina,14.35,106.8,2.7683,0,0,3.095,-4.11,,5.4 0,20.2931,2022,3,10,133.6991,89.7531,14.5178,0.15933,3.17502,2.66915,8.95,5.0,0.15 1.098,0.0150,0.0043,107,0.0052,Known errors,-1.00,-1,-1,-1 20220310_0922-1,59595.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jan 16, 00:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org