IOTA/IOTA-ES occultation update for (593) Titania / UCAC4 291-224268 event on 2023 Jun 25, 07:43 UT Visible from South America Summary ------- On 2023 Jun 25 UT, the 79 km diameter asteroid (593) Titania will occult a 12.8 mag star in the constellation Piscis Austrinus 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 2.09 mag to 14.72 mag (the magnitude of the asteroid) for at most 7.570 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 Jun 25, 07:32 - 2023 Jun 25, 07:53 * geocentric midpoint of event [JD]: 2460120.82166987 * magnitude of target star: 12.80 * magnitude drop [mag]: 2.09 * estimated maximum duration [s]: 7.570 * Moon: 41 % sunlit, 142° distance * Sun: 134° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 79 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.005", 71°) * approx speed of asteroid's shadow [km/s]: 10.4391 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 291-224268 by 593 Titania on 2023 Jun 25 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 156 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -50 3 5 .... 157 0 0 -50 6 19 7 53 19.6 0 144 -21 .. .. .. -50 42 46 .. .. .. -50 56 31 .... 158 0 0 -50 58 9 7 53 19.4 2 143 -21 -50 22 23 -51 33 50 -50 8 52 -51 47 17 0.00 159 0 0 -51 47 24 7 53 19.0 3 142 -22 -51 12 23 -52 22 22 -50 59 8 -52 35 33 -0.05 160 0 0 -52 34 16 7 53 18.4 4 142 -23 -51 59 57 -53 8 32 -51 46 58 -53 21 28 -0.06 161 0 0 -53 18 52 7 53 17.6 5 141 -24 -52 45 12 -53 52 29 -52 32 28 -54 5 10 -0.07 162 0 0 -54 1 21 7 53 16.7 5 140 -24 -53 28 18 -54 34 19 -53 15 49 -54 46 46 -0.08 163 0 0 -54 41 48 7 53 15.7 6 139 -25 -54 9 22 -55 14 11 -53 57 6 -55 26 24 -0.08 164 0 0 -55 20 22 7 53 14.6 7 138 -26 -54 48 30 -55 52 11 -54 36 27 -56 4 11 -0.09 165 0 0 -55 57 8 7 53 13.4 8 138 -26 -55 25 49 -56 28 25 -55 13 59 -56 40 13 -0.09 166 0 0 -56 32 13 7 53 12.1 9 137 -27 -56 1 25 -57 2 58 -55 49 47 -57 14 34 -0.09 167 0 0 -57 5 41 7 53 10.7 10 136 -27 -56 35 24 -57 35 57 -56 23 56 -57 47 22 -0.09 168 0 0 -57 37 39 7 53 9.3 10 135 -28 -57 7 49 -58 7 25 -56 56 33 -58 18 40 -0.09 169 0 0 -58 8 9 7 53 7.8 11 134 -28 -57 38 47 -58 37 29 -57 27 41 -58 48 33 -0.09 170 0 0 -58 37 18 7 53 6.3 12 133 -29 -58 8 22 -59 6 12 -57 57 25 -59 17 6 -0.09 171 0 0 -59 5 8 7 53 4.7 13 133 -29 -58 36 37 -59 33 37 -58 25 50 -59 44 22 -0.09 172 0 0 -59 31 44 7 53 3.1 13 132 -30 -59 3 37 -59 59 50 -58 52 59 -60 10 26 -0.09 173 0 0 -59 57 10 7 53 1.4 14 131 -30 -59 29 25 -60 24 52 -59 18 56 -60 35 20 -0.09 174 0 0 -60 21 28 7 52 59.7 14 130 -31 -59 54 5 -60 48 49 -59 43 44 -60 59 8 -0.09 175 0 0 -60 44 42 7 52 58.0 15 129 -31 -60 17 40 -61 11 42 -60 7 26 -61 21 54 -0.09 176 0 0 -61 6 54 7 52 56.2 16 128 -32 -60 40 12 -61 33 35 -60 30 6 -61 43 39 -0.09 177 0 0 -61 28 8 7 52 54.5 16 128 -32 -61 1 45 -61 54 29 -60 51 46 -62 4 26 -0.09 178 0 0 -61 48 25 7 52 52.7 17 127 -32 -61 22 21 -62 14 29 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Uncertainty in time = +/- 2 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 291-224268 * constellation : Piscis Austrinus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 38 00.6598 DE: -31 58 59.120 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 38 00.6599 DE: -31 58 59.120 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (593) Titania asteroid class: approx. diameter [km]: 79 approx. diameter ["]: 0.045 distance from Earth [AU]: 2.44540 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.010", 0.005", 70.718° remarks: * orbital elements for (593)Titania : Mean anomaly = 207.1170812046 deg Arg. of pericenter = 30.8210853407 deg Long. of node = 75.9375389509 deg Inclination = 16.9054537259 deg Eccentricity = 0.2173550429 Semimajor axis = 2.6973262015 AU Perihelion dist = 2.1110487494 AU Mag: H = 9.42, G = 0.06 Epoch of elements : MJD 60120.32173611 TDT (2023 Jun 25.3217) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,7.57,2023,6,25,7.720077,-0.081971,0.032030,-2.144191,-5.488148,-0.004016,-0.000170,0.000001,0.000001 -64.1424,-31.8760,64.86,23.39,False UCAC4 291-224268,21.63351661,-31.9830889,0.00,12.80,0.00,0.0,0,,21.65688693,-31.8759574,2.09,0.00,0,0,0 593,Titania,14.72,79.0,2.4454,0,0,-0.606,-19.74,,4.0,0 0,207.0455,2023,6,25,30.8211,75.9375,16.9055,0.21736,2.69733,2.11105,9.47,5.0,0.15 1.189,0.0103,0.0047,71,0.0084,Known errors,-1.00,-1,-1,-1 20230625_224268,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org