IOTA/IOTA-ES occultation update for (438) Zeuxo / TYC 6394-00561-1 event on 2024 Oct 22, 02:29 UT Visible from Summary ------- On 2024 Oct 22 UT, the 61.1965600207572 km diameter asteroid (438) Zeuxo will occult a 9.6 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 4.63 mag to 14.23 mag (the magnitude of the asteroid) for at most 14.300 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, 02:05 - 2024 Oct 22, 02:52 * geocentric midpoint of event [JD]: 2460605.60349987 * magnitude of target star: 9.62 * magnitude drop [mag]: 4.63 * estimated maximum duration [s]: 14.300 * Moon: 72 % sunlit, 112° distance * Sun: 131° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 65 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 67°) * approx speed of asteroid's shadow [km/s]: 4.2877 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6394-00561-1 by 438 Zeuxo 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 -171 0 0 24 38 0 2 52 15.1 0 107 25 24 56 19 24 19 38 25 8 29 24 7 24 .... -170 0 0 24 20 59 2 52 14.8 1 107 24 24 39 22 24 2 33 24 51 35 23 50 17 0.28 -169 0 0 24 3 9 2 52 14.0 2 108 23 24 21 37 23 44 39 24 33 52 23 32 20 0.31 -168 0 0 23 44 30 2 52 12.7 3 108 23 24 3 2 23 25 56 24 15 20 23 13 34 0.32 -167 0 0 23 25 2 2 52 11.1 4 108 22 23 43 38 23 6 23 23 55 59 22 53 58 0.32 -166 0 0 23 4 43 2 52 8.9 5 109 21 23 23 24 22 46 0 23 35 49 22 33 31 0.33 -165 0 0 22 43 35 2 52 6.3 6 109 21 23 2 21 22 24 46 23 14 48 22 12 15 0.33 -164 0 0 22 21 35 2 52 3.2 7 109 20 22 40 27 22 2 42 22 52 58 21 50 7 0.33 -163 0 0 21 58 46 2 51 59.6 8 110 19 22 17 42 21 39 47 22 30 17 21 27 8 0.33 -162 0 0 21 35 5 2 51 55.5 9 110 18 21 54 7 21 16 1 22 6 45 21 3 18 0.33 -161 0 0 21 10 32 2 51 50.9 10 111 18 21 29 40 20 51 23 21 42 22 20 38 37 0.33 -160 0 0 20 45 9 2 51 45.8 11 111 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34 23 0.43 40 0 0 -63 44 42 2 5 54.7 2 240 4 -63 24 16 -64 5 11 -63 10 42 -64 18 50 0.45 41 0 0 -63 28 18 2 5 54.2 2 239 4 -63 7 43 -63 48 56 -62 54 3 -64 2 41 0.48 42 0 0 -63 11 16 2 5 53.8 1 238 4 -62 50 32 -63 32 4 -62 36 46 -63 45 56 0.54 43 0 0 -62 53 36 2 5 53.5 1 237 5 -62 32 42 -63 14 34 -62 18 50 -63 28 32 0.70 44 0 0 -62 35 16 2 5 53.4 0 236 5 .. .. .. -62 56 24 .. .. .. -63 10 28 2.52 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6394-00561-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 01 28.0320 DE: -15 12 37.019 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 01 28.0320 DE: -15 12 37.019 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.6 * B mag [mag]: 10.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (438) Zeuxo asteroid class: approx. diameter [km]: 61 approx. diameter ["]: 0.047 distance from Earth [AU]: 1.79850 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.017", 0.003", 66.781° remarks: * orbital elements for (438)Zeuxo : Mean anomaly = 90.4057368068 deg Arg. of pericenter = 210.1068779332 deg Long. of node = 49.0844826885 deg Inclination = 7.3675507209 deg Eccentricity = 0.0674995026 Semimajor axis = 2.5535566051 AU Perihelion dist = 2.3811928045 AU Mag: H = 10.01, G = 0.15 Epoch of elements : MJD 60605.10349995 TDT (2024 Oct 22.1035) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,14.30,2024,10,22,2.483997,-0.252360,-0.243548,-1.680530,1.741428,0.003690,0.002155,0.000001,0.000000 -82.5821,-15.0766,138.85,-11.18,False TYC 6394-00561-1,23.02445335,-15.2102829,10.20,9.62,9.31,0.1,0,,23.04651724,-15.0766043,4.63,4.49,0,0,0 438,Zeuxo,14.23,61.327,1.7985,0,0,-0.566,8.52,,4.0,0 0,90.3807,2024,10,22,210.1069,49.0845,7.3676,0.06750,2.55356,2.38119,10.01,5.0,0.15 1.333,0.0167,0.0030,67,0.0156,Known errors,1.10,0,-1,-1 20241022_0561-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org