IOTA/IOTA-ES occultation update for (455) Bruchsalia / UCAC4 394-002055 event on 2022 Oct 05, 13:34 UT Visible from New Zealand, S Australia Summary ------- On 2022 Oct 05 UT, the 84.2 km diameter asteroid (455) Bruchsalia will occult a 12.0 mag star in the constellation Cetus for observers along a path across New Zealand, S Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.37 mag to 10.97 mag (the magnitude of the asteroid) for at most 13.740 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 05, 13:18 - 2022 Oct 05, 13:50 * geocentric midpoint of event [JD]: 2459858.06559475 * magnitude of target star: 11.95 * magnitude drop [mag]: 0.37 * estimated maximum duration [s]: 13.740 * Moon: 78 % sunlit, 64° distance * Sun: 157° distance * rough path description: New Zealand, S Australia Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 0.28 * 1 sigma uncertainty interval [seconds]: +/- 6.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.057, +/- 0.036) * 1 sigma uncertainty ellipse (major, minor, PA): (0.067", 0.006", 58°) * approx speed of asteroid's shadow [km/s]: 6.1272 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 394-002055 by 455 Bruchsalia on 2022 Oct 5 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 71 0 0 -28 25 54 13 49 53.4 1 102 -8 -27 59 50 -28 52 3 -27 45 13 -29 6 49 .... 72 0 0 -28 37 55 13 49 53.0 2 102 -8 -28 11 52 -29 4 4 -27 57 14 -29 18 50 0.41 73 0 0 -28 49 53 13 49 52.3 3 101 -9 -28 23 50 -29 16 2 -28 9 12 -29 30 48 0.44 74 0 0 -29 1 47 13 49 51.3 3 101 -10 -28 35 45 -29 27 56 -28 21 7 -29 42 42 0.46 75 0 0 -29 13 38 13 49 50.1 4 100 -11 -28 47 36 -29 39 47 -28 32 59 -29 54 33 0.46 76 0 0 -29 25 25 13 49 48.5 5 100 -12 -28 59 23 -29 51 34 -28 44 46 -30 6 20 0.47 77 0 0 -29 37 9 13 49 46.7 6 99 -13 -29 11 6 -30 3 17 -28 56 30 -30 18 2 0.47 78 0 0 -29 48 48 13 49 44.7 7 99 -13 -29 22 46 -30 14 56 -29 8 9 -30 29 41 0.48 79 0 0 -30 0 22 13 49 42.3 8 99 -14 -29 34 21 -30 26 30 -29 19 44 -30 41 15 0.48 80 0 0 -30 11 52 13 49 39.7 9 98 -15 -29 45 51 -30 38 0 -29 31 14 -30 52 45 0.48 81 0 0 -30 23 17 13 49 36.9 10 97 -16 -29 57 16 -30 49 24 -29 42 40 -31 4 9 0.48 82 0 0 -30 34 38 13 49 33.7 10 97 -16 -30 8 37 -31 0 44 -29 54 1 -31 15 29 0.48 83 0 0 -30 45 53 13 49 30.4 11 96 -17 -30 19 52 -31 11 59 -30 5 17 -31 26 44 0.48 84 0 0 -30 57 3 13 49 26.7 12 96 -18 -30 31 3 -31 23 9 -30 16 27 -31 37 53 0.49 85 0 0 -31 8 7 13 49 22.9 13 95 -19 -30 42 8 -31 34 13 -30 27 32 -31 48 57 0.49 86 0 0 -31 19 6 13 49 18.8 14 95 -19 -30 53 7 -31 45 11 -30 38 32 -31 59 55 0.49 87 0 0 -31 29 59 13 49 14.4 15 94 -20 -31 4 0 -31 56 4 -30 49 25 -32 10 48 0.49 88 0 0 -31 40 46 13 49 9.8 16 94 -21 -31 14 48 -32 6 51 -31 0 13 -32 21 34 0.49 89 0 0 -31 51 27 13 49 5.0 16 93 -22 -31 25 29 -32 17 32 -31 10 55 -32 32 15 0.49 90 0 0 -32 2 2 13 48 59.9 17 93 -22 -31 36 5 -32 28 6 -31 21 30 -32 42 49 0.49 91 0 0 -32 12 31 13 48 54.7 18 92 -23 -31 46 34 -32 38 34 -31 31 59 -32 53 17 0.49 92 0 0 -32 22 53 13 48 49.2 19 92 -24 -31 56 56 -32 48 56 -31 42 22 -33 3 38 0.49 93 0 0 -32 33 8 13 48 43.4 20 91 -24 -32 7 12 -32 59 11 -31 52 38 -33 13 53 0.49 94 0 0 -32 43 17 13 48 37.5 21 90 -25 -32 17 21 -33 9 19 -32 2 48 -33 24 1 0.49 95 0 0 -32 53 19 13 48 31.4 21 90 -26 -32 27 23 -33 19 20 -32 12 50 -33 34 2 0.49 96 0 0 -33 3 14 13 48 25.0 22 89 -26 -32 37 19 -33 29 15 -32 22 46 -33 43 56 0.49 97 0 0 -33 13 1 13 48 18.5 23 89 -27 -32 47 7 -33 39 2 -32 32 34 -33 53 43 0.49 98 0 0 -33 22 42 13 48 11.7 24 88 -28 -32 56 48 -33 48 42 -32 42 15 -34 3 23 0.49 99 0 0 -33 32 15 13 48 4.8 25 87 -28 -33 6 21 -33 58 14 -32 51 49 -34 12 55 0.49 100 0 0 -33 41 40 13 47 57.6 25 87 -29 -33 15 47 -34 7 40 -33 1 15 -34 22 20 0.49 101 0 0 -33 50 58 13 47 50.3 26 86 -30 -33 25 6 -34 16 57 -33 10 34 -34 31 37 0.50 102 0 0 -34 0 9 13 47 42.8 27 85 -30 -33 34 17 -34 26 7 -33 19 45 -34 40 47 0.50 103 0 0 -34 9 11 13 47 35.1 28 85 -31 -33 43 20 -34 35 9 -33 28 49 -34 49 49 0.50 104 0 0 -34 18 6 13 47 27.2 29 84 -31 -33 52 15 -34 44 4 -33 37 44 -34 58 43 0.50 105 0 0 -34 26 53 13 47 19.2 29 84 -32 -34 1 2 -34 52 50 -33 46 32 -35 7 29 0.50 106 0 0 -34 35 32 13 47 10.9 30 83 -33 -34 9 42 -35 1 28 -33 55 11 -35 16 7 0.50 107 0 0 -34 44 3 13 47 2.5 31 82 -33 -34 18 13 -35 9 58 -34 3 43 -35 24 37 0.50 108 0 0 -34 52 25 13 46 54.0 32 81 -34 -34 26 36 -35 18 20 -34 12 6 -35 32 58 0.50 109 0 0 -35 0 39 13 46 45.3 32 81 -34 -34 34 50 -35 26 34 -34 20 21 -35 41 12 0.50 110 0 0 -35 8 45 13 46 36.4 33 80 -35 -34 42 57 -35 34 39 -34 28 28 -35 49 17 0.50 111 0 0 -35 16 42 13 46 27.4 34 79 -35 -34 50 55 -35 42 36 -34 36 26 -35 57 13 0.50 112 0 0 -35 24 31 13 46 18.2 35 79 -36 -34 58 44 -35 50 24 -34 44 15 -36 5 2 0.50 113 0 0 -35 32 12 13 46 8.9 35 78 -36 -35 6 25 -35 58 4 -34 51 56 -36 12 41 0.50 114 0 0 -35 39 43 13 45 59.4 36 77 -37 -35 13 57 -36 5 35 -34 59 29 -36 20 12 0.50 115 0 0 -35 47 6 13 45 49.8 37 76 -37 -35 21 20 -36 12 58 -35 6 53 -36 27 34 0.50 116 0 0 -35 54 20 13 45 40.0 38 75 -38 -35 28 35 -36 20 12 -35 14 8 -36 34 47 0.50 117 0 0 -36 1 26 13 45 30.1 38 75 -38 -35 35 41 -36 27 16 -35 21 14 -36 41 52 0.50 118 0 0 -36 8 22 13 45 20.1 39 74 -39 -35 42 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20 -29 32 54 0.51 -109 0 0 -28 40 15 13 19 49.1 16 266 6 -28 14 13 -29 6 24 -27 59 36 -29 21 10 0.51 -108 0 0 -28 28 28 13 19 44.1 16 265 7 -28 2 26 -28 54 37 -27 47 49 -29 9 23 0.51 -107 0 0 -28 16 38 13 19 39.3 15 265 7 -27 50 36 -28 42 47 -27 35 59 -28 57 33 0.52 -106 0 0 -28 4 46 13 19 34.8 14 264 8 -27 38 43 -28 30 55 -27 24 6 -28 45 41 0.52 -105 0 0 -27 52 51 13 19 30.6 13 264 9 -27 26 48 -28 19 0 -27 12 11 -28 33 46 0.52 -104 0 0 -27 40 54 13 19 26.6 12 263 10 -27 14 51 -28 7 3 -27 0 14 -28 21 49 0.52 -103 0 0 -27 28 55 13 19 22.9 11 263 11 -27 2 52 -27 55 4 -26 48 15 -28 9 50 0.52 -102 0 0 -27 16 54 13 19 19.5 10 263 12 -26 50 51 -27 43 3 -26 36 14 -27 57 49 0.52 -101 0 0 -27 4 51 13 19 16.3 9 262 13 -26 38 49 -27 31 0 -26 24 11 -27 45 46 0.53 -100 0 0 -26 52 48 13 19 13.4 9 262 14 -26 26 45 -27 18 57 -26 12 8 -27 33 42 0.53 - 99 0 0 -26 40 43 13 19 10.8 8 261 14 -26 14 40 -27 6 52 -26 0 3 -27 21 37 0.54 - 98 0 0 -26 28 37 13 19 8.5 7 261 15 -26 2 34 -26 54 46 -25 47 57 -27 9 32 0.54 - 97 0 0 -26 16 31 13 19 6.5 6 260 16 -25 50 28 -26 42 39 -25 35 51 -26 57 25 0.55 - 96 0 0 -26 4 24 13 19 4.7 5 260 17 -25 38 21 -26 30 32 -25 23 44 -26 45 18 0.56 - 95 0 0 -25 52 17 13 19 3.3 4 259 18 -25 26 14 -26 18 25 -25 11 37 -26 33 11 0.57 - 94 0 0 -25 40 10 13 19 2.1 3 259 19 -25 14 7 -26 6 18 -24 59 30 -26 21 4 0.60 - 93 0 0 -25 28 3 13 19 1.3 2 259 20 -25 2 1 -25 54 11 -24 47 24 -26 8 57 0.64 - 92 0 0 -25 15 57 13 19 0.7 1 258 21 -24 49 55 -25 42 5 -24 35 18 -25 56 51 0.76 - 91 0 0 -25 3 52 13 19 0.4 0 258 22 -24 37 50 -25 30 0 -24 23 13 -25 44 45 1.65 Uncertainty in time = +/- 8 secs Prediction of 2022 Aug 20.1 Data for the target star ------------------------ * name: UCAC4 394-002055 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 01 50 40.5190 DE: -11 22 58.534 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 01 50 40.5190 DE: -11 22 58.534 * position source: Gaia14_DR2 * standard error: RA,DE [mas]: (0.600,0.400) * V mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (455) Bruchsalia asteroid class: approx. diameter [km]: 84 approx. diameter ["]: 0.121 distance from Earth [AU]: 0.95640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#100 date of fit: 2022 Aug 01 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): 0.067", 0.006", 58.092° remarks: * orbital elements for (455)Bruchsalia : Mean anomaly = 13.8833013257 deg Arg. of pericenter = 273.4800929133 deg Long. of node = 76.0787293731 deg Inclination = 12.0158239333 deg Eccentricity = 0.2953295277 Semimajor axis = 2.6559961712 AU Perihelion dist = 1.8716020765 AU Mag: H = 8.94, G = 0.15 Epoch of elements : MJD 59857.56562500 TDT (2022 Oct 05.5656) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1002022Aug01,13.74,2022,10,5,13.574274,0.012925,-0.454251,-3.456915,-0.100157,-0.001443,0.001404,0.000001,0.000001 170.1283,-11.2687,-26.51,-4.86,False UCAC4 394-002055,1.84458859,-11.3829259,0.00,11.95,0.00,0.0,0,,1.86340833,-11.2687467,0.37,0.00,0,0,0 455,Bruchsalia,10.97,84.2,0.9564,0,0,-2.161,-0.91,,4.4,0 0,13.7545,2022,10,5,273.4801,76.0787,12.0158,0.29533,2.65600,1.87160,8.94,5.0,0.15 1.281,0.0670,0.0060,58,0.0342,Known errors,-1.00,-1,-1,-1 20221005_002055,59811.11 ------ 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