IOTA/IOTA-ES occultation update for (75) Eurydike / TYC 6786-01543-1 event on 2023 May 17, 00:53 UT Visible from S Africa, South America Summary ------- On 2023 May 17 UT, the 58.7 km diameter asteroid (75) Eurydike will occult a 10.0 mag star in the constellation Scorpius for observers along a path across S Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.58 mag to 12.50 mag (the magnitude of the asteroid) for at most 5.310 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 17, 00:44 - 2023 May 17, 01:03 * geocentric midpoint of event [JD]: 2460081.53767109 * magnitude of target star: 10.03 * magnitude drop [mag]: 2.58 * estimated maximum duration [s]: 5.310 * Moon: 8 % sunlit, 142° distance * Sun: 171° distance * rough path description: S Africa, South America Additional comments ------------------- duplicated source flag The occultation path -------------------- * approximate projected width [km]: 59 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.005", 103°) * approx speed of asteroid's shadow [km/s]: 11.0456 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6786-01543-1 by 75 Eurydike on 2023 May 17 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 -104 0 0 - 3 5 52 1 3 45.9 0 117 -4 - 2 47 47 - 3 23 59 - 2 44 10 - 3 27 35 .... -103 0 0 - 3 37 18 1 3 45.8 1 117 -5 - 3 19 11 - 3 55 25 - 3 15 35 - 3 59 2 0.20 -102 0 0 - 4 8 48 1 3 45.4 2 117 -6 - 3 50 41 - 4 26 57 - 3 47 5 - 4 30 33 0.16 -101 0 0 - 4 40 24 1 3 44.8 4 117 -7 - 4 22 16 - 4 58 33 - 4 18 39 - 5 2 10 0.15 -100 0 0 - 5 12 3 1 3 44.0 5 117 -8 - 4 53 55 - 5 30 13 - 4 50 18 - 5 33 50 0.15 - 99 0 0 - 5 43 45 1 3 42.9 6 117 -9 - 5 25 36 - 6 1 55 - 5 21 59 - 6 5 32 0.14 - 98 0 0 - 6 15 29 1 3 41.6 7 117 -10 - 5 57 20 - 6 33 40 - 5 53 43 - 6 37 17 0.14 - 97 0 0 - 6 47 14 1 3 40.2 8 117 -11 - 6 29 5 - 7 5 25 - 6 25 28 - 7 9 2 0.14 - 96 0 0 - 7 19 0 1 3 38.5 9 117 -13 - 7 0 50 - 7 37 10 - 6 57 13 - 7 40 48 0.14 - 95 0 0 - 7 50 44 1 3 36.5 10 117 -14 - 7 32 34 - 8 8 55 - 7 28 57 - 8 12 33 0.14 - 94 0 0 - 8 22 27 1 3 34.4 11 116 -15 - 8 4 17 - 8 40 38 - 8 0 40 - 8 44 15 0.14 - 93 0 0 - 8 54 7 1 3 32.1 12 116 -16 - 8 35 57 - 9 12 18 - 8 32 20 - 9 15 56 0.14 - 92 0 0 - 9 25 44 1 3 29.5 14 116 -17 - 9 7 34 - 9 43 55 - 9 3 57 - 9 47 33 0.14 - 91 0 0 - 9 57 17 1 3 26.7 15 116 -18 - 9 39 7 -10 15 28 - 9 35 30 -10 19 5 0.14 - 90 0 0 -10 28 45 1 3 23.8 16 116 -19 -10 10 35 -10 46 55 -10 6 58 -10 50 32 0.14 - 89 0 0 -11 0 6 1 3 20.6 17 116 -20 -10 41 57 -11 18 16 -10 38 20 -11 21 53 0.14 - 88 0 0 -11 31 21 1 3 17.3 18 115 -21 -11 13 13 -11 49 31 -11 9 36 -11 53 8 0.14 - 87 0 0 -12 2 29 1 3 13.7 19 115 -22 -11 44 20 -12 20 37 -11 40 44 -12 24 14 0.14 - 86 0 0 -12 33 28 1 3 10.0 20 115 -23 -12 15 20 -12 51 36 -12 11 44 -12 55 13 0.13 - 85 0 0 -13 4 17 1 3 6.0 21 115 -24 -12 46 11 -13 22 25 -12 42 34 -13 26 2 0.13 - 84 0 0 -13 34 57 1 3 1.9 22 114 -26 -13 16 51 -13 53 4 -13 13 15 -13 56 41 0.13 - 83 0 0 -14 5 27 1 2 57.7 23 114 -27 -13 47 22 -14 23 33 -13 43 46 -14 27 9 0.13 - 82 0 0 -14 35 45 1 2 53.2 24 114 -28 -14 17 41 -14 53 50 -14 14 5 -14 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69 0 0 -20 47 33 1 1 41.5 38 109 -41 -20 29 48 -21 5 20 -20 26 15 -21 8 52 0.14 - 68 0 0 -21 14 8 1 1 35.1 39 109 -42 -20 56 24 -21 31 53 -20 52 52 -21 35 25 0.14 - 67 0 0 -21 40 23 1 1 28.6 40 108 -43 -21 22 41 -21 58 6 -21 19 9 -22 1 38 0.14 - 66 0 0 -22 6 18 1 1 21.9 41 108 -44 -21 48 38 -22 23 59 -21 45 7 -22 27 31 0.14 - 65 0 0 -22 31 53 1 1 15.2 42 107 -44 -22 14 15 -22 49 32 -22 10 44 -22 53 3 0.14 - 64 0 0 -22 57 7 1 1 8.4 43 107 -45 -22 39 31 -23 14 44 -22 36 0 -23 18 15 0.14 - 63 0 0 -23 22 0 1 1 1.5 44 106 -46 -23 4 25 -23 39 35 -23 0 55 -23 43 5 0.14 - 62 0 0 -23 46 31 1 0 54.5 45 106 -47 -23 28 59 -24 4 5 -23 25 29 -24 7 35 0.14 - 61 0 0 -24 10 41 1 0 47.4 46 105 -48 -23 53 11 -24 28 13 -23 49 42 -24 31 42 0.14 - 60 0 0 -24 34 30 1 0 40.3 47 105 -49 -24 17 1 -24 51 59 -24 13 32 -24 55 28 0.14 - 59 0 0 -24 57 56 1 0 33.1 48 104 -50 -24 40 29 -25 15 23 -24 37 1 -25 18 52 0.14 - 58 0 0 -25 20 59 1 0 25.8 49 104 -51 -25 3 35 -25 38 24 -25 0 7 -25 41 53 0.14 - 57 0 0 -25 43 41 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-17 26 12 0 44 55.4 11 245 -6 -17 8 12 -17 44 13 -17 4 37 -17 47 48 0.15 79 0 0 -16 56 48 0 44 53.3 10 244 -4 -16 38 47 -17 14 50 -16 35 12 -17 18 26 0.15 80 0 0 -16 27 8 0 44 51.4 9 244 -3 -16 9 6 -16 45 12 -16 5 30 -16 48 48 0.15 81 0 0 -15 57 13 0 44 49.8 8 244 -2 -15 39 9 -16 15 18 -15 35 33 -16 18 54 0.16 82 0 0 -15 27 4 0 44 48.3 7 243 -1 -15 8 58 -15 45 10 -15 5 22 -15 48 46 0.16 83 0 0 -14 56 40 0 44 47.0 6 243 0 -14 38 34 -15 14 47 -14 34 57 -15 18 24 0.17 84 0 0 -14 26 3 0 44 45.9 5 243 1 -14 7 56 -14 44 12 -14 4 19 -14 47 49 0.18 85 0 0 -13 55 14 0 44 45.1 4 243 2 -13 37 6 -14 13 24 -13 33 29 -14 17 1 0.19 86 0 0 -13 24 13 0 44 44.4 3 242 3 -13 6 4 -13 42 24 -13 2 27 -13 46 1 0.21 87 0 0 -12 53 2 0 44 44.0 2 242 4 -12 34 51 -13 11 13 -12 31 14 -13 14 50 0.27 88 0 0 -12 21 40 0 44 43.8 1 242 5 -12 3 29 -12 39 52 -11 59 51 -12 43 29 0.54 Uncertainty in time = +/- 2 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6786-01543-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 49 50.4611 DE: -27 21 03.156 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 49 50.4611 DE: -27 21 03.157 * 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: (75) Eurydike asteroid class: approx. diameter [km]: 59 approx. diameter ["]: 0.052 distance from Earth [AU]: 1.55580 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#104 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): 0.018", 0.005", 102.689° remarks: * orbital elements for (75)Eurydike : Mean anomaly = 295.3558073199 deg Arg. of pericenter = 339.5117031760 deg Long. of node = 359.3198904476 deg Inclination = 4.9915349040 deg Eccentricity = 0.3035789064 Semimajor axis = 2.6741515955 AU Perihelion dist = 1.8623355786 AU Mag: H = 9.12, G = 0.23 Epoch of elements : MJD 60081.03729167 TDT (2023 May 17.0373) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1042023Apr24,5.31,2023,5,17,0.904106,-0.013078,-0.146699,-6.209795,0.553530,-0.000406,0.000790,0.000001,0.000000 -10.2164,-27.4228,165.54,19.23,False TYC 6786-01543-1,15.83068363,-27.3508767,0.00,10.03,0.00,0.0,0,,15.85460549,-27.4228033,2.58,0.00,0,0,0 75,Eurydike,12.50,58.7,1.5558,0,0,-2.636,3.13,,3.0,0 0,295.1220,2023,5,16,339.5117,359.3199,4.9915,0.30358,2.67415,1.86234,9.16,5.0,0.15 1.100,0.0177,0.0047,103,0.0052,Known errors,-1.00,-1,-1,-1 20230517_1543-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org