IOTA/IOTA-ES occultation update for (398) Admete / TYC 6754-01143-1 event on 2023 May 06, 16:47 UT Visible from Australia Summary ------- On 2023 May 06 UT, the 49.9 km diameter asteroid (398) Admete will occult a 10.4 mag star in the constellation Hydra 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 4.67 mag to 15.02 mag (the magnitude of the asteroid) for at most 3.410 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 May 06, 16:39 - 2023 May 06, 16:54 * geocentric midpoint of event [JD]: 2460071.19938000 * magnitude of target star: 10.36 * magnitude drop [mag]: 4.67 * estimated maximum duration [s]: 3.410 * Moon: 99 % sunlit, 14° distance * Sun: 169° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.006", 105°) * approx speed of asteroid's shadow [km/s]: 14.6157 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6754-01143-1 by 398 Admete on 2023 May 6 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 28 0 0 24 46 42 16 54 20.9 0 121 -4 .. .. .. 24 30 52 .. .. .. 24 24 30 .... 29 0 0 24 13 38 16 54 20.8 1 121 -5 24 29 32 23 57 45 24 35 56 23 51 22 0.10 30 0 0 23 40 3 16 54 20.6 2 122 -6 23 55 59 23 24 7 24 2 24 23 17 42 0.00 31 0 0 23 5 55 16 54 20.2 3 122 -7 23 21 55 22 49 56 23 28 21 22 43 31 -0.04 32 0 0 22 31 17 16 54 19.7 4 122 -8 22 47 19 22 15 15 22 53 46 22 8 48 -0.05 33 0 0 21 56 8 16 54 19.0 5 123 -9 22 12 13 21 40 3 22 18 41 21 33 35 -0.06 34 0 0 21 20 29 16 54 18.1 7 123 -10 21 36 37 21 4 21 21 43 6 20 57 52 -0.07 35 0 0 20 44 21 16 54 17.1 8 124 -11 21 0 32 20 28 11 21 7 2 20 21 41 -0.07 36 0 0 20 7 44 16 54 15.9 9 124 -12 20 23 58 19 51 32 20 30 29 19 45 1 -0.08 37 0 0 19 30 41 16 54 14.5 10 124 -14 19 46 56 19 14 25 19 53 29 19 7 53 -0.08 38 0 0 18 53 10 16 54 12.9 11 125 -15 19 9 28 18 36 52 19 16 2 18 30 19 -0.08 39 0 0 18 15 14 16 54 11.2 12 125 -16 18 31 34 17 58 54 18 38 9 17 52 20 -0.09 40 0 0 17 36 53 16 54 9.3 13 125 -17 17 53 15 17 20 31 17 59 51 17 13 56 -0.09 41 0 0 16 58 8 16 54 7.2 14 126 -18 17 14 33 16 41 44 17 21 9 16 35 8 -0.09 42 0 0 16 19 0 16 54 5.0 16 126 -19 16 35 27 16 2 34 16 42 4 15 55 58 -0.09 43 0 0 15 39 31 16 54 2.5 17 126 -20 15 56 0 15 23 4 16 2 37 15 16 27 -0.09 44 0 0 14 59 42 16 53 59.9 18 126 -21 15 16 12 14 43 12 15 22 50 14 36 35 -0.09 45 0 0 14 19 33 16 53 57.1 19 127 -23 14 36 5 14 3 2 14 42 44 13 56 24 -0.09 46 0 0 13 39 6 16 53 54.1 20 127 -24 13 55 39 13 22 34 14 2 19 13 15 55 -0.09 47 0 0 12 58 23 16 53 50.9 21 127 -25 13 14 57 12 41 49 13 21 37 12 35 10 -0.09 48 0 0 12 17 24 16 53 47.5 23 127 -26 12 33 59 12 0 49 12 40 40 11 54 10 -0.09 49 0 0 11 36 11 16 53 44.0 24 128 -27 11 52 47 11 19 35 11 59 28 11 12 55 -0.09 50 0 0 10 54 45 16 53 40.3 25 128 -28 11 11 22 10 38 9 11 18 4 10 31 28 -0.10 51 0 0 10 13 8 16 53 36.4 26 128 -30 10 29 46 9 56 31 10 36 27 9 49 50 -0.10 52 0 0 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35 58 -21 17 54 -0.09 -163 0 0 -20 30 43 16 39 58.3 10 244 -8 -20 15 42 -20 45 44 -20 9 40 -20 51 45 -0.09 -162 0 0 -20 3 53 16 39 57.0 9 244 -7 -19 48 48 -20 18 56 -19 42 45 -20 25 0 -0.09 -161 0 0 -19 36 25 16 39 55.9 8 243 -6 -19 21 17 -19 51 32 -19 15 12 -19 57 37 -0.09 -160 0 0 -19 8 20 16 39 54.9 7 243 -5 -18 53 9 -19 23 31 -18 47 3 -19 29 37 -0.09 -159 0 0 -18 39 39 16 39 54.0 6 243 -4 -18 24 24 -18 54 53 -18 18 16 -19 1 0 -0.09 -158 0 0 -18 10 20 16 39 53.3 5 242 -3 -17 55 2 -18 25 38 -17 48 53 -18 31 47 -0.08 -157 0 0 -17 40 25 16 39 52.7 4 242 -1 -17 25 3 -17 55 46 -17 18 53 -18 1 57 -0.08 -156 0 0 -17 9 53 16 39 52.2 2 242 0 -16 54 28 -17 25 18 -16 48 16 -17 31 30 -0.06 -155 0 0 -16 38 45 16 39 52.0 1 241 1 -16 23 16 -16 54 13 -16 17 2 -17 0 26 -0.03 -154 0 0 -16 7 0 16 39 51.8 0 241 2 -15 51 27 -16 22 32 -15 45 12 -16 28 46 0.28 Uncertainty in time = +/- 2 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6754-01143-1 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 45 56.3073 DE: -27 42 29.069 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 45 56.3073 DE: -27 42 29.069 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (398) Admete asteroid class: approx. diameter [km]: 50 approx. diameter ["]: 0.031 distance from Earth [AU]: 2.19970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.014", 0.006", 104.543° remarks: * orbital elements for (398)Admete : Mean anomaly = 129.5681347831 deg Arg. of pericenter = 160.5737704441 deg Long. of node = 279.7956438160 deg Inclination = 9.5533637037 deg Eccentricity = 0.2239741840 Semimajor axis = 2.7382644748 AU Perihelion dist = 2.1249639234 AU Mag: H = 10.41, G = 0.15 Epoch of elements : MJD 60070.69930556 TDT (2023 May 06.6993) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,3.41,2023,5,6,16.785120,0.034484,0.080923,-7.588873,3.234695,0.000148,0.001110,0.000001,0.000000 105.7706,-27.8073,-72.62,16.60,False TYC 6754-01143-1,14.76564092,-27.7080746,0.00,10.36,0.00,0.0,0,,14.78875018,-27.8073311,4.68,0.00,0,0,0 398,Admete,15.02,49.9,2.1997,0,0,-2.286,12.93,,2.4,0 0,129.4160,2023,5,6,160.5738,279.7956,9.5534,0.22397,2.73826,2.12496,10.45,5.0,0.15 1.201,0.0140,0.0060,105,0.0063,Known errors,-1.00,-1,-1,-1 20230506_1143-1,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org