IOTA/IOTA-ES occultation update for (2393) Suzuki / TYC 6243-00049-1 event on 2023 Mar 18, 18:31 UT Visible from Australia Summary ------- On 2023 Mar 18 UT, the 50.3 km diameter asteroid (2393) Suzuki will occult a 10.0 mag star in the constellation Ophiuchus 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 6.59 mag to 16.55 mag (the magnitude of the asteroid) for at most 3.180 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 18, 18:24 - 2023 Mar 18, 18:38 * geocentric midpoint of event [JD]: 2460022.27211729 * magnitude of target star: 9.96 * magnitude drop [mag]: 6.59 * estimated maximum duration [s]: 3.180 * Moon: 13 % sunlit, 53° distance * Sun: 94° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.004", 86°) * approx speed of asteroid's shadow [km/s]: 15.7997 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6243-00049-1 by 2393 Suzuki on 2023 Mar 18 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 76 0 0 -15 54 23 18 25 7.8 0 110 -71 -16 8 55 -15 39 51 -16 14 53 -15 33 54 .... 77 0 0 -16 15 19 18 25 7.9 1 110 -71 -16 29 49 -16 0 48 -16 35 46 -15 54 51 0.12 78 0 0 -16 35 57 18 25 8.2 2 109 -71 -16 50 26 -16 21 27 -16 56 23 -16 15 31 0.09 79 0 0 -16 56 17 18 25 8.6 3 109 -71 -17 10 45 -16 41 49 -17 16 41 -16 35 53 0.08 80 0 0 -17 16 19 18 25 9.1 4 109 -71 -17 30 45 -17 1 52 -17 36 41 -16 55 56 0.07 81 0 0 -17 36 2 18 25 9.7 6 108 -71 -17 50 27 -17 21 37 -17 56 22 -17 15 42 0.07 82 0 0 -17 55 26 18 25 10.4 7 108 -71 -18 9 50 -17 41 2 -18 15 45 -17 35 8 0.07 83 0 0 -18 14 32 18 25 11.3 8 108 -71 -18 28 54 -18 0 9 -18 34 48 -17 54 15 0.06 84 0 0 -18 33 17 18 25 12.3 9 108 -71 -18 47 39 -18 18 56 -18 53 32 -18 13 3 0.06 85 0 0 -18 51 44 18 25 13.4 10 107 -70 -19 6 4 -18 37 24 -19 11 57 -18 31 31 0.06 86 0 0 -19 9 50 18 25 14.6 11 107 -70 -19 24 9 -18 55 31 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jan 27.8 Data for the target star ------------------------ * name: TYC 6243-00049-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 32 48.9480 DE: -19 14 30.318 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 32 48.9481 DE: -19 14 30.318 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2393) Suzuki asteroid class: approx. diameter [km]: 50 approx. diameter ["]: 0.024 distance from Earth [AU]: 2.90470 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2022 Nov 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): 0.017", 0.004", 85.56° remarks: * orbital elements for (2393)Suzuki : Mean anomaly = 289.2177541621 deg Arg. of pericenter = 114.3200968450 deg Long. of node = 223.9168759783 deg Inclination = 10.2898780326 deg Eccentricity = 0.1926504870 Semimajor axis = 3.2250289670 AU Perihelion dist = 2.6037255659 AU Mag: H = 10.78, G = 0.15 Epoch of elements : MJD 60021.77215278 TDT (2023 Mar 18.7722) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542022Nov25,3.18,2023,3,18,18.530815,0.010625,-0.042619,8.649229,2.172172,-0.005898,0.000241,0.000000,0.000000 169.5222,-19.2592,-95.95,-0.84,False TYC 6243-00049-1,17.54692997,-19.2417549,0.00,9.96,0.00,0.0,0,,17.56957282,-19.2591603,6.59,0.00,0,0,0 2393,Suzuki,16.55,50.3,2.9047,0,0,1.850,6.57,,3.0,0 0,289.0864,2023,3,18,114.3201,223.9169,10.2899,0.19265,3.22503,2.60373,10.80,5.0,0.15 1.205,0.0173,0.0040,86,0.0049,Known errors,-1.00,-1,-1,-1 20230318_0049-1,59971.82 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jan 27, 19:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org