IOTA/IOTA-ES occultation update for (253) Mathilde / TYC 634-00707-1 event on 2023 Jun 10, 19:37 UT Visible from Australia Summary ------- On 2023 Jun 10 UT, the 57.8065629865785 km diameter asteroid (253) Mathilde will occult a 9.5 mag star in the constellation Aries for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.62 mag to 15.11 mag (the magnitude of the asteroid) for at most 1.380 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: 2023 Jun 10, 19:35 - 2023 Jun 10, 19:40 * geocentric midpoint of event [JD]: 2460106.31781329 * magnitude of target star: 9.50 * magnitude drop [mag]: 5.62 * estimated maximum duration [s]: 1.380 * Moon: 50 % sunlit, 47° distance * Sun: 43° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 63 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.001", 73°) * approx speed of asteroid's shadow [km/s]: 42.0136 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 634-00707-1 by 253 Mathilde on 2023 Jun 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 122 0 0 -36 54 3 19 35 19.2 0 74 -40 -37 11 45 -36 36 24 -37 12 49 -36 35 20 .... 123 0 0 -36 40 29 19 35 19.2 1 74 -39 -36 58 12 -36 22 48 -36 59 16 -36 21 44 0.19 124 0 0 -36 26 39 19 35 19.3 2 73 -39 -36 44 23 -36 8 57 -36 45 27 -36 7 52 0.28 125 0 0 -36 12 32 19 35 19.4 3 73 -38 -36 30 18 -35 54 49 -36 31 22 -35 53 45 0.32 126 0 0 -35 58 10 19 35 19.5 4 72 -37 -36 15 57 -35 40 26 -36 17 2 -35 39 22 0.34 127 0 0 -35 43 33 19 35 19.7 5 71 -36 -36 1 21 -35 25 47 -36 2 26 -35 24 43 0.35 128 0 0 -35 28 40 19 35 19.9 5 71 -35 -35 46 29 -35 10 53 -35 47 34 -35 9 48 0.36 129 0 0 -35 13 31 19 35 20.2 6 70 -35 -35 31 22 -34 55 43 -35 32 27 -34 54 38 0.37 130 0 0 -34 58 8 19 35 20.5 7 70 -34 -35 16 0 -34 40 18 -35 17 5 -34 39 13 0.38 131 0 0 -34 42 29 19 35 20.8 8 69 -33 -35 0 22 -34 24 38 -35 1 27 -34 23 33 0.38 132 0 0 -34 26 35 19 35 21.2 9 68 -32 -34 44 30 -34 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Apr 21.3 Data for the target star ------------------------ * name: TYC 634-00707-1 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 18 05.2953 DE: +12 11 47.430 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 18 05.2955 DE: +12 11 47.431 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.5 * B mag [mag]: 9.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (253) Mathilde asteroid class: approx. diameter [km]: 58 approx. diameter ["]: 0.030 distance from Earth [AU]: 2.66710 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#232 date of fit: 2023 Feb 09 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): 0.007", 0.001", 72.895° remarks: * orbital elements for (253)Mathilde : Mean anomaly = 22.7869254873 deg Arg. of pericenter = 157.8574881564 deg Long. of node = 179.5336265619 deg Inclination = 6.7415774310 deg Eccentricity = 0.2639284204 Semimajor axis = 2.6488012520 AU Perihelion dist = 1.9497073215 AU Mag: H = 10.41, G = 0.15 Epoch of elements : MJD 60105.81780417 TDT (2023 Jun 10.8178) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#2322023Feb09,1.38,2023,6,10,19.627519,0.100862,-0.372982,22.896686,6.170897,-0.003253,-0.001228,-0.000001,0.000000 -158.4798,12.3029,-114.54,23.04,False TYC 634-00707-1,2.30147086,12.1965081,9.90,9.50,9.28,0.1,0,,2.32211132,12.3029042,5.61,5.38,0,0,0 253,Mathilde,15.11,58.0,2.6671,0,0,5.152,20.35,,0.6,0 0,22.6000,2023,6,10,157.8575,179.5336,6.7416,0.26393,2.64880,1.94971,10.43,5.0,0.15 1.030,0.0070,0.0009,73,0.0009,Known errors,-1.00,-1,-1,-1 20230610_0707-1,60055.27 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 21, 06:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org