IOTA/IOTA-ES occultation update for (52) Europa / UCAC4 369-126651 event on 2023 May 16, 07:39 UT Visible from South America Summary ------- On 2023 May 16 UT, the 325.6 km diameter asteroid (52) Europa will occult a 13.5 mag star in the constellation Sagittarius for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.24 mag to 11.97 mag (the magnitude of the asteroid) for at most 43.740 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 May 16, 07:26 - 2023 May 16, 07:53 * geocentric midpoint of event [JD]: 2460080.81948721 * magnitude of target star: 13.50 * magnitude drop [mag]: 0.24 * estimated maximum duration [s]: 43.740 * Moon: 12 % sunlit, 99° distance * Sun: 139° distance * rough path description: South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 362 * 1 sigma uncertainty interval [path widths]: +/- 0.01 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.001", 94°) * approx speed of asteroid's shadow [km/s]: 7.4444 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 369-126651 by 52 Europa on 2023 May 16 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 -174 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -24 48 43 .. .. .. -24 50 28 .... -173 0 0 -23 23 20 7 52 52.9 0 108 -40 -21 41 36 -25 6 36 -21 39 55 -25 8 20 .... -172 0 0 -23 41 13 7 52 52.6 1 107 -41 -21 59 26 -25 24 30 -21 57 45 -25 26 14 0.40 -171 0 0 -23 59 6 7 52 52.0 2 107 -42 -22 17 18 -25 42 24 -22 15 36 -25 44 9 0.43 -170 0 0 -24 16 59 7 52 51.2 3 106 -43 -22 35 10 -26 0 20 -22 33 29 -26 2 4 0.44 -169 0 0 -24 34 53 7 52 50.1 4 106 -44 -22 53 2 -26 18 15 -22 51 21 -26 19 59 0.45 -168 0 0 -24 52 46 7 52 48.8 5 106 -44 -23 10 55 -26 36 9 -23 9 13 -26 37 54 0.45 -167 0 0 -25 10 39 7 52 47.2 6 105 -45 -23 28 46 -26 54 3 -23 27 5 -26 55 47 0.45 -166 0 0 -25 28 30 7 52 45.4 7 105 -46 -23 46 37 -27 11 55 -23 44 56 -27 13 40 0.46 -165 0 0 -25 46 21 7 52 43.3 8 104 -47 -24 4 27 -27 29 46 -24 2 45 -27 31 30 0.46 -164 0 0 -26 4 9 7 52 40.9 9 104 -48 -24 22 15 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32 -31 25 44 -27 58 51 -31 27 28 0.51 20 0 0 -29 25 14 7 27 23.7 8 256 24 -27 43 22 -31 8 37 -27 41 41 -31 10 22 0.51 21 0 0 -29 7 59 7 27 21.7 7 255 24 -27 26 6 -30 51 24 -27 24 24 -30 53 9 0.52 22 0 0 -28 50 38 7 27 19.9 6 255 25 -27 8 44 -30 34 5 -27 7 2 -30 35 50 0.53 23 0 0 -28 33 12 7 27 18.4 5 254 26 -26 51 16 -30 16 40 -26 49 34 -30 18 25 0.54 24 0 0 -28 15 40 7 27 17.1 4 254 27 -26 33 43 -29 59 9 -26 32 2 -30 0 54 0.55 25 0 0 -27 58 4 7 27 16.1 3 253 28 -26 16 5 -29 41 34 -26 14 24 -29 43 19 0.57 26 0 0 -27 40 22 7 27 15.3 2 253 29 -25 58 23 -29 23 53 -25 56 42 -29 25 38 0.61 27 0 0 -27 22 37 7 27 14.7 2 252 29 -25 40 37 -29 6 8 -25 38 55 -29 7 53 0.70 28 0 0 -27 4 47 7 27 14.4 1 252 30 -25 22 47 -28 48 19 -25 21 5 -28 50 4 1.08 29 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -28 30 26 .. .. .. -28 32 11 .... Uncertainty in time = +/- 5 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 369-126651 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 21 19.9766 DE: -16 21 40.863 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 21 19.9766 DE: -16 21 40.863 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 13.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (52) Europa asteroid class: ShapeModel approx. diameter [km]: 326 approx. diameter ["]: 0.175 distance from Earth [AU]: 2.55810 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#121 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): 0.020", 0.001", 94.443° remarks: * orbital elements for (52)Europa : Mean anomaly = 145.8199698681 deg Arg. of pericenter = 342.9419083030 deg Long. of node = 128.5836286923 deg Inclination = 7.4787229112 deg Eccentricity = 0.1111084166 Semimajor axis = 3.0937336410 AU Perihelion dist = 2.7499937946 AU Mag: H = 6.56, G = 0.18 Epoch of elements : MJD 60080.31888889 TDT (2023 May 16.3189) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1212023Apr24,43.74,2023,5,16,7.667693,-0.014660,-0.438607,-4.199482,0.140456,-0.003720,-0.000679,0.000001,0.000000 -73.1092,-16.3514,64.08,19.07,False UCAC4 369-126651,18.35554904,-16.3613508,0.00,13.50,0.00,0.0,0,,18.37814657,-16.3513686,0.24,0.00,0,0,1 52,Europa,11.97,325.6,2.5581,0,0,-1.003,0.48,,16.4,0 0,145.7622,2023,5,16,342.9419,128.5836,7.4787,0.11111,3.09373,2.74999,6.58,5.0,0.15 1.008,0.0197,0.0012,94,0.0015,Known errors,-1.00,-1,-1,-1 20230516_126651,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org