IOTA/IOTA-ES occultation update for (1574) Meyer / UCAC4 321-082072 event on 2023 Mar 05, 17:19 UT Visible from New Zealand, Australia Summary ------- On 2023 Mar 05 UT, the 58.6 km diameter asteroid (1574) Meyer will occult a 12.3 mag star in the constellation Scorpius for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.78 mag to 16.05 mag (the magnitude of the asteroid) for at most 6.540 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 Mar 05, 17:07 - 2023 Mar 05, 17:30 * geocentric midpoint of event [JD]: 2460009.22153737 * magnitude of target star: 12.30 * magnitude drop [mag]: 3.78 * estimated maximum duration [s]: 6.540 * Moon: 97 % sunlit, 98° distance * Sun: 102° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 62 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.005", 86°) * approx speed of asteroid's shadow [km/s]: 8.9588 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 321-082072 by 1574 Meyer on 2023 Mar 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 82 0 0 .. .. .... .. .. .. .. .. .. -15 25 23 .. .. .. -15 33 6 .. .. .. .... 83 0 0 -15 36 3 17 7 49.1 1 117 -59 -15 55 8 -15 17 0 -16 2 52 -15 9 19 .... 84 0 0 -16 5 53 17 7 49.5 2 116 -59 -16 25 0 -15 46 49 -16 32 44 -15 39 7 0.36 85 0 0 -16 35 49 17 7 50.2 3 116 -59 -16 54 57 -16 16 43 -17 2 42 -16 9 1 0.36 86 0 0 -17 5 49 17 7 51.1 4 116 -60 -17 24 58 -16 46 42 -17 32 44 -16 39 0 0.37 87 0 0 -17 35 53 17 7 52.3 5 116 -60 -17 55 3 -17 16 45 -18 2 49 -17 9 2 0.37 88 0 0 -18 6 0 17 7 53.8 6 115 -60 -18 25 11 -17 46 51 -18 32 57 -17 39 8 0.37 89 0 0 -18 36 9 17 7 55.5 8 115 -60 -18 55 21 -18 16 59 -19 3 7 -18 9 15 0.37 90 0 0 -19 6 18 17 7 57.5 9 115 -61 -19 25 31 -18 47 8 -19 33 18 -18 39 24 0.37 91 0 0 -19 36 28 17 7 59.8 10 114 -61 -19 55 42 -19 17 17 -20 3 29 -19 9 33 0.37 92 0 0 -20 6 37 17 8 2.3 11 114 -61 -20 25 52 -19 47 26 -20 33 39 -19 39 41 0.37 93 0 0 -20 36 45 17 8 5.1 12 114 -61 -20 56 0 -20 17 33 -21 3 47 -20 9 48 0.37 94 0 0 -21 6 50 17 8 8.1 13 113 -61 -21 26 5 -20 47 38 -21 33 53 -20 39 53 0.37 95 0 0 -21 36 52 17 8 11.4 14 113 -61 -21 56 7 -21 17 39 -22 3 55 -21 9 54 0.37 96 0 0 -22 6 49 17 8 14.9 15 112 -60 -22 26 4 -21 47 36 -22 33 52 -21 39 51 0.37 97 0 0 -22 36 41 17 8 18.6 16 112 -60 -22 55 56 -22 17 28 -23 3 44 -22 9 43 0.37 98 0 0 -23 6 27 17 8 22.6 17 112 -60 -23 25 42 -22 47 15 -23 33 30 -22 39 30 0.37 99 0 0 -23 36 6 17 8 26.9 18 111 -60 -23 55 21 -23 16 54 -24 3 9 -23 9 9 0.37 100 0 0 -24 5 38 17 8 31.3 19 111 -60 -24 24 52 -23 46 26 -24 32 40 -23 38 41 0.37 101 0 0 -24 35 0 17 8 36.0 20 110 -59 -24 54 15 -24 15 49 -25 2 2 -24 8 4 0.37 102 0 0 -25 4 14 17 8 40.9 21 110 -59 -25 23 27 -24 45 3 -25 31 14 -24 37 18 0.37 103 0 0 -25 33 17 17 8 46.0 22 109 -58 -25 52 30 -25 14 7 -26 0 16 -25 6 22 0.37 104 0 0 -26 2 9 17 8 51.3 23 109 -58 -26 21 21 -25 42 59 -26 29 7 -25 35 16 0.37 105 0 0 -26 30 49 17 8 56.8 24 108 -58 -26 50 0 -26 11 40 -26 57 46 -26 3 57 0.37 106 0 0 -26 59 16 17 9 2.5 25 108 -57 -27 18 26 -26 40 9 -27 26 12 -26 32 26 0.37 107 0 0 -27 27 31 17 9 8.4 26 107 -57 -27 46 39 -27 8 24 -27 54 24 -27 0 42 0.37 108 0 0 -27 55 31 17 9 14.5 27 107 -56 -28 14 38 -27 36 26 -28 22 23 -27 28 44 0.37 109 0 0 -28 23 16 17 9 20.8 28 106 -56 -28 42 22 -28 4 12 -28 50 6 -27 56 31 0.37 110 0 0 -28 50 46 17 9 27.2 29 105 -55 -29 9 51 -28 31 44 -29 17 34 -28 24 3 0.37 111 0 0 -29 18 0 17 9 33.8 30 105 -54 -29 37 3 -28 58 59 -29 44 46 -28 51 19 0.37 112 0 0 -29 44 57 17 9 40.6 31 104 -54 -30 3 58 -29 25 58 -30 11 40 -29 18 18 0.37 113 0 0 -30 11 36 17 9 47.5 32 103 -53 -30 30 36 -29 52 39 -30 38 17 -29 45 0 0.37 114 0 0 -30 37 58 17 9 54.6 33 103 -53 -30 56 56 -30 19 3 -31 4 37 -30 11 24 0.37 115 0 0 -31 4 1 17 10 1.8 34 102 -52 -31 22 57 -30 45 8 -31 30 37 -30 37 30 0.37 116 0 0 -31 29 46 17 10 9.2 35 101 -51 -31 48 40 -31 10 54 -31 56 19 -31 3 17 0.37 117 0 0 -31 55 10 17 10 16.7 36 101 -51 -32 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.... Uncertainty in time = +/- 3 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 321-082072 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 57 30.5348 DE: -25 54 49.060 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 57 30.5348 DE: -25 54 49.060 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1574) Meyer asteroid class: approx. diameter [km]: 59 approx. diameter ["]: 0.025 distance from Earth [AU]: 3.17650 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Feb 07 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): 0.012", 0.005", 86.454° remarks: * orbital elements for (1574)Meyer : Mean anomaly = 76.9387173865 deg Arg. of pericenter = 259.5551031252 deg Long. of node = 245.6021471294 deg Inclination = 14.4756905407 deg Eccentricity = 0.0342664710 Semimajor axis = 3.5408213477 AU Perihelion dist = 3.4194898957 AU Mag: H = 9.91, G = 0.15 Epoch of elements : MJD 60008.72152778 TDT (2023 Mar 05.7215) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Feb07,6.54,2023,3,5,17.316897,-0.014266,-0.329821,5.051759,-0.220814,-0.005686,0.001285,0.000000,0.000000 176.7768,-25.9801,-76.88,-5.96,False UCAC4 321-082072,15.95848186,-25.9136276,0.00,12.30,0.00,0.0,0,,15.98175355,-25.9800902,3.78,0.00,0,0,0 1574,Meyer,16.05,58.6,3.1765,0,0,1.037,-0.61,,3.8,0 0,76.8320,2023,3,5,259.5551,245.6021,14.4757,0.03427,3.54082,3.41949,9.94,5.0,0.15 1.202,0.0123,0.0050,86,0.0051,Known errors,-1.00,-1,-1,-1 20230305_082072,59990.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org