IOTA/IOTA-ES occultation update for (829) Academia / TYC 7353-01950-1 event on 2023 Jun 14, 11:22 UT Visible from New Zealand, Australia Summary ------- On 2023 Jun 14 UT, the 42.1 km diameter asteroid (829) Academia will occult a 9.9 mag star in the constellation Scorpius for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.07 mag to 14.99 mag (the magnitude of the asteroid) for at most 3.600 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: 84 * date and approx. time of event: 2023 Jun 14, 11:13 - 2023 Jun 14, 11:31 * geocentric midpoint of event [JD]: 2460109.97402417 * magnitude of target star: 9.93 * magnitude drop [mag]: 5.07 * estimated maximum duration [s]: 3.600 * Moon: 14 % sunlit, 145° distance * Sun: 163° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 0.62 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.034, +/- 0.021) * 1 sigma uncertainty ellipse (major, minor, PA): (0.035", 0.020", 102°) * approx speed of asteroid's shadow [km/s]: 11.7085 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7353-01950-1 by 829 Academia on 2023 Jun 14 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 84 0 0 0 54 11 11 31 31.9 0 125 12 1 8 18 0 40 4 1 25 49 0 22 30 .... 85 0 0 0 11 42 11 31 31.7 2 125 11 0 25 50 - 0 2 28 0 43 24 - 0 20 4 0.21 86 0 0 - 0 31 7 11 31 31.3 3 125 10 - 0 16 56 - 0 45 18 0 0 40 - 1 2 57 0.19 87 0 0 - 1 14 12 11 31 30.6 4 125 9 - 0 59 59 - 1 28 25 - 0 42 21 - 1 46 6 0.18 88 0 0 - 1 57 32 11 31 29.6 5 125 8 - 1 43 18 - 2 11 47 - 1 25 37 - 2 29 31 0.17 89 0 0 - 2 41 7 11 31 28.4 6 125 6 - 2 26 51 - 2 55 23 - 2 9 8 - 3 13 9 0.17 90 0 0 - 3 24 54 11 31 26.9 8 125 5 - 3 10 36 - 3 39 12 - 2 52 52 - 3 56 59 0.17 91 0 0 - 4 8 51 11 31 25.2 9 125 4 - 3 54 33 - 4 23 11 - 3 36 46 - 4 41 0 0.17 92 0 0 - 4 52 58 11 31 23.2 10 125 3 - 4 38 38 - 5 7 19 - 4 20 50 - 5 25 9 0.16 93 0 0 - 5 37 12 11 31 21.0 11 125 2 - 5 22 51 - 5 51 34 - 5 5 2 - 6 9 26 0.16 94 0 0 - 6 21 33 11 31 18.5 13 124 0 - 6 7 10 - 6 35 56 - 5 49 20 - 6 53 49 0.16 95 0 0 - 7 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-22 36 21 0.19 - 85 0 0 -21 23 26 11 13 42.9 6 235 -14 -21 9 7 -21 37 45 -20 51 22 -21 55 33 0.20 - 84 0 0 -20 42 5 11 13 41.8 5 234 -13 -20 27 45 -20 56 26 -20 9 57 -21 14 17 0.21 - 83 0 0 -20 0 18 11 13 40.9 4 234 -12 -19 45 56 -20 14 41 -19 28 6 -20 32 34 0.23 - 82 0 0 -19 18 6 11 13 40.3 3 234 -11 -19 3 42 -19 32 30 -18 45 50 -19 50 25 0.26 - 81 0 0 -18 35 29 11 13 39.9 1 233 -10 -18 21 3 -18 49 55 -18 3 9 -19 7 52 0.35 - 80 0 0 -17 52 29 11 13 39.7 0 233 -8 -17 38 2 -18 6 56 .. .. .. -18 24 55 1.19 Uncertainty in time = +/- 4 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 7353-01950-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 31 44.7955 DE: -34 54 22.114 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 31 44.7955 DE: -34 54 22.115 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (829) Academia asteroid class: approx. diameter [km]: 42 approx. diameter ["]: 0.033 distance from Earth [AU]: 1.77350 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.035", 0.020", 101.637° remarks: * orbital elements for (829)Academia : Mean anomaly = 228.9158580504 deg Arg. of pericenter = 42.4430599408 deg Long. of node = 352.3325365377 deg Inclination = 8.2779521614 deg Eccentricity = 0.0989129649 Semimajor axis = 2.5799110724 AU Perihelion dist = 2.3247244191 AU Mag: H = 11.04, G = 0.15 Epoch of elements : MJD 60109.47395833 TDT (2023 Jun 14.4740) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,3.60,2023,6,14,11.376580,-0.035097,-0.172727,-6.476009,1.317196,0.001238,0.001044,0.000001,0.000000 175.1737,-34.9573,9.42,23.26,False TYC 7353-01950-1,16.52910988,-34.9061428,0.00,9.93,0.00,0.0,0,,16.55498401,-34.9573403,5.07,0.00,0,0,0 829,Academia,14.99,42.1,1.7735,0,0,-2.611,6.54,,2.0,0 0,228.8031,2023,6,14,42.4431,352.3325,8.2780,0.09891,2.57991,2.32472,11.06,5.0,0.15 1.621,0.0347,0.0203,102,0.0203,Known errors,-1.00,-1,-1,-1 20230614_1950-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org