IOTA/IOTA-ES occultation update for (1586) Thiele / TYC 5823-00960-1 event on 2024 Oct 22, 22:45 UT Visible from Summary ------- On 2024 Oct 22 UT, the 12.7573517014782 km diameter asteroid (1586) Thiele will occult a 9.5 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.96 mag to 16.45 mag (the magnitude of the asteroid) for at most 3.500 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: 2024 Oct 22, 22:22 - 2024 Oct 22, 23:08 * geocentric midpoint of event [JD]: 2460606.44829458 * magnitude of target star: 9.49 * magnitude drop [mag]: 6.96 * estimated maximum duration [s]: 3.500 * Moon: 63 % sunlit, 122° distance * Sun: 133° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 5.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 71°) * approx speed of asteroid's shadow [km/s]: 3.6865 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5823-00960-1 by 1586 Thiele on 2024 Oct 22 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 -135 0 0 -49 59 58 23 8 15.5 1 106 41 -49 55 25 -50 4 31 -49 53 32 -50 6 24 .... -134 0 0 -50 11 30 23 8 15.1 1 105 41 -50 6 57 -50 16 3 -50 5 5 -50 17 56 0.64 -133 0 0 -50 22 48 23 8 14.4 2 105 40 -50 18 16 -50 27 21 -50 16 23 -50 29 14 0.68 -132 0 0 -50 33 52 23 8 13.3 3 104 40 -50 29 20 -50 38 25 -50 27 27 -50 40 17 0.70 -131 0 0 -50 44 42 23 8 12.0 3 103 39 -50 40 10 -50 49 14 -50 38 17 -50 51 7 0.71 -130 0 0 -50 55 17 23 8 10.4 4 102 38 -50 50 46 -50 59 49 -50 48 53 -51 1 42 0.72 -129 0 0 -51 5 39 23 8 8.6 5 102 38 -51 1 7 -51 10 10 -50 59 15 -51 12 3 0.72 -128 0 0 -51 15 46 23 8 6.4 5 101 37 -51 11 15 -51 20 18 -51 9 23 -51 22 10 0.73 -127 0 0 -51 25 39 23 8 4.1 6 100 37 -51 21 9 -51 30 11 -51 19 17 -51 32 3 0.73 -126 0 0 -51 35 19 23 8 1.4 6 99 36 -51 30 48 -51 39 50 -51 28 56 -51 41 42 0.73 -125 0 0 -51 44 44 23 7 58.5 7 99 35 -51 40 14 -51 49 15 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0.88 71 0 0 -25 11 58 22 22 52.6 2 259 -29 -25 7 30 -25 16 27 -25 5 39 -25 18 18 0.93 72 0 0 -24 59 46 22 22 51.4 1 259 -28 -24 55 18 -25 4 15 -24 53 27 -25 6 6 1.05 73 0 0 -24 47 49 22 22 50.7 1 258 -27 -24 43 21 -24 52 17 -24 41 30 -24 54 8 1.53 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5823-00960-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 03 10.7205 DE: -11 01 23.857 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 03 10.7203 DE: -11 01 23.858 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.5 * B mag [mag]: 9.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1586) Thiele asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.009 distance from Earth [AU]: 1.88410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.015", 0.001", 71.17° remarks: * orbital elements for (1586)Thiele : Mean anomaly = 207.8381299343 deg Arg. of pericenter = 30.0290187291 deg Long. of node = 125.8411270872 deg Inclination = 4.0589180930 deg Eccentricity = 0.1062889298 Semimajor axis = 2.4287237896 AU Perihelion dist = 2.1705773371 AU Mag: H = 12.08, G = 0.15 Epoch of elements : MJD 60605.94829466 TDT (2024 Oct 22.9483) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,3.50,2024,10,22,22.759070,0.137770,-0.598686,-2.028216,-0.464778,0.003743,0.001911,0.000001,0.000000 -27.1161,-10.8890,-165.30,-11.48,False TYC 5823-00960-1,23.05297792,-11.0232935,9.83,9.49,9.31,0.1,0,,23.07483716,-10.8890335,6.96,6.69,0,0,0 1586,Thiele,16.45,12.894,1.8841,0,0,-0.641,-2.16,,0.8,0 0,207.5912,2024,10,22,30.0290,125.8411,4.0589,0.10629,2.42872,2.17058,12.08,5.0,0.15 1.207,0.0147,0.0012,71,0.0019,Known errors,1.06,0,-1,-1 20241022_0960-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org