IOTA/IOTA-ES occultation update for (732) Tjilaki / UCAC4 373-128149 event on 2024 Nov 02, 12:12 UT Visible from Summary ------- On 2024 Nov 02 UT, the 33.2860982007619 km diameter asteroid (732) Tjilaki will occult a 11.1 mag star in the constellation Scutum for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.63 mag to 15.70 mag (the magnitude of the asteroid) for at most 0.930 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: 2024 Nov 02, 12:09 - 2024 Nov 02, 12:15 * geocentric midpoint of event [JD]: 2460617.00895862 * magnitude of target star: 11.09 * magnitude drop [mag]: 4.63 * estimated maximum duration [s]: 0.930 * Moon: 1 % sunlit, 47° distance * Sun: 56° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.002", 92°) * approx speed of asteroid's shadow [km/s]: 35.8994 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 373-128149 by 732 Tjilaki on 2024 Nov 2 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 - 36 0 0 3 52 47 12 9 56.5 1 105 55 3 43 21 4 2 13 3 40 29 4 5 5 .... - 35 0 0 3 36 2 12 9 56.6 2 106 56 3 26 36 3 45 28 3 23 44 3 48 21 0.06 - 34 0 0 3 19 12 12 9 56.7 3 106 57 3 9 46 3 28 38 3 6 54 3 31 31 0.04 - 33 0 0 3 2 18 12 9 56.9 4 106 58 2 52 52 3 11 44 2 49 59 3 14 37 0.03 - 32 0 0 2 45 19 12 9 57.1 5 106 59 2 35 52 2 54 45 2 33 0 2 57 38 0.03 - 31 0 0 2 28 16 12 9 57.4 6 106 60 2 18 49 2 37 43 2 15 57 2 40 35 0.02 - 30 0 0 2 11 9 12 9 57.8 7 106 61 2 1 43 2 20 36 1 58 50 2 23 29 0.02 - 29 0 0 1 54 0 12 9 58.2 8 106 62 1 44 33 2 3 26 1 41 40 2 6 19 0.02 - 28 0 0 1 36 47 12 9 58.7 9 106 63 1 27 20 1 46 14 1 24 27 1 49 7 0.02 - 27 0 0 1 19 31 12 9 59.2 10 106 64 1 10 4 1 28 58 1 7 11 1 31 51 0.02 - 26 0 0 1 2 14 12 9 59.8 11 106 65 0 52 47 1 11 41 0 49 54 1 14 34 0.02 - 25 0 0 0 44 54 12 10 0.5 12 106 66 0 35 27 0 54 21 0 32 34 0 57 14 0.01 - 24 0 0 0 27 33 12 10 1.2 13 106 67 0 18 6 0 37 1 0 15 13 0 39 54 0.01 - 23 0 0 0 10 11 12 10 2.0 14 106 68 0 0 44 0 19 39 - 0 2 9 0 22 32 0.01 - 22 0 0 - 0 7 11 12 10 2.8 15 106 69 - 0 16 39 0 2 16 - 0 19 32 0 5 9 0.01 - 21 0 0 - 0 24 34 12 10 3.7 16 106 70 - 0 34 2 - 0 15 7 - 0 36 55 - 0 12 14 0.01 - 20 0 0 - 0 41 57 12 10 4.6 17 106 71 - 0 51 25 - 0 32 30 - 0 54 18 - 0 29 37 0.01 - 19 0 0 - 0 59 20 12 10 5.6 18 106 71 - 1 8 47 - 0 49 53 - 1 11 40 - 0 47 0 0.01 - 18 0 0 - 1 16 42 12 10 6.7 20 106 72 - 1 26 9 - 1 7 15 - 1 29 2 - 1 4 22 0.01 - 17 0 0 - 1 34 3 12 10 7.8 21 106 73 - 1 43 30 - 1 24 36 - 1 46 23 - 1 21 42 0.01 - 16 0 0 - 1 51 22 12 10 9.0 22 106 74 - 2 0 49 - 1 41 55 - 2 3 42 - 1 39 2 0.01 - 15 0 0 - 2 8 39 12 10 10.2 23 106 75 - 2 18 6 - 1 59 12 - 2 20 59 - 1 56 19 0.01 - 14 0 0 - 2 25 54 12 10 11.5 24 106 75 - 2 35 21 - 2 16 27 - 2 38 14 - 2 13 34 0.01 - 13 0 0 - 2 43 7 12 10 12.8 25 106 76 - 2 52 33 - 2 33 40 - 2 55 26 - 2 30 47 0.01 - 12 0 0 - 3 0 16 12 10 14.2 26 106 77 - 3 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0.02 136 0 0 - 6 4 56 12 15 50.8 6 255 -49 - 6 14 20 - 5 55 32 - 6 17 12 - 5 52 40 0.02 137 0 0 - 5 48 51 12 15 51.1 5 255 -50 - 5 58 15 - 5 39 26 - 6 1 7 - 5 36 34 0.03 138 0 0 - 5 32 39 12 15 51.4 4 255 -51 - 5 42 3 - 5 23 14 - 5 44 55 - 5 20 22 0.03 139 0 0 - 5 16 20 12 15 51.6 3 255 -52 - 5 25 45 - 5 6 55 - 5 28 37 - 5 4 3 0.04 140 0 0 - 4 59 55 12 15 51.7 2 255 -53 - 5 9 20 - 4 50 30 - 5 12 13 - 4 47 38 0.06 141 0 0 - 4 43 24 12 15 51.8 1 255 -54 - 4 52 50 - 4 33 59 - 4 55 42 - 4 31 7 0.12 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 373-128149 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 26 01.9358 DE: -15 24 25.321 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 26 01.9358 DE: -15 24 25.322 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.1 * B mag [mag]: 12.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (732) Tjilaki asteroid class: approx. diameter [km]: 33 approx. diameter ["]: 0.016 distance from Earth [AU]: 2.79760 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.012", 0.002", 91.993° remarks: * orbital elements for (732)Tjilaki : Mean anomaly = 55.2381948117 deg Arg. of pericenter = 63.3307887866 deg Long. of node = 173.2933675876 deg Inclination = 11.0026079715 deg Eccentricity = 0.0448863958 Semimajor axis = 2.4561550382 AU Perihelion dist = 2.3459070911 AU Mag: H = 10.56, G = 0.15 Epoch of elements : MJD 60616.50895838 TDT (2024 Nov 02.5090) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,0.93,2024,11,2,12.215007,-0.000891,-0.003485,20.202366,-1.561234,0.004715,0.000667,-0.000001,0.000000 51.3732,-15.3930,-7.33,-14.99,False UCAC4 373-128149,18.43387111,-15.4070336,12.30,11.09,10.44,0.1,0,,18.45732753,-15.3930060,4.62,4.82,0,0,0 732,Tjilaki,15.70,33.489,2.7976,0,0,4.392,-4.90,,1.8,0 0,55.1079,2024,11,2,63.3308,173.2934,11.0026,0.04489,2.45616,2.34591,10.56,5.0,0.15 1.153,0.0120,0.0025,92,0.0025,Known errors,0.88,0,-1,-1 20241102_128149,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org