IOTA/IOTA-ES occultation update for (2209) Tianjin / TYC 4972-01334-1 event on 2024 Jul 09, 00:38 UT Visible from Summary ------- On 2024 Jul 09 UT, the 16.554 km diameter asteroid (2209) Tianjin will occult a 11.6 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.24 mag to 16.83 mag (the magnitude of the asteroid) for at most 1.450 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 Jul 09, 00:28 - 2024 Jul 09, 00:47 * geocentric midpoint of event [JD]: 2460500.52665429 * magnitude of target star: 11.60 * magnitude drop [mag]: 5.24 * estimated maximum duration [s]: 1.450 * Moon: 9 % sunlit, 63° distance * Sun: 98° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.001", 109°) * approx speed of asteroid's shadow [km/s]: 11.4462 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4972-01334-1 by 2209 Tianjin on 2024 Jul 9 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 -176 0 0 24 42 9 0 29 5.9 0 98 80 24 37 37 24 46 41 24 35 20 24 48 58 .... -175 0 0 24 33 59 0 29 6.0 1 99 80 24 29 27 24 38 31 24 27 9 24 40 49 0.06 -174 0 0 24 25 23 0 29 6.2 2 99 79 24 20 50 24 29 55 24 18 33 24 32 13 0.04 -173 0 0 24 16 20 0 29 6.7 3 99 78 24 11 47 24 20 53 24 9 30 24 23 11 0.04 -172 0 0 24 6 51 0 29 7.2 4 100 77 24 2 18 24 11 25 24 0 0 24 13 43 0.04 -171 0 0 23 56 56 0 29 7.9 5 100 76 23 52 22 24 1 30 23 50 4 24 3 48 0.04 -170 0 0 23 46 34 0 29 8.8 6 101 75 23 42 0 23 51 8 23 39 42 23 53 27 0.03 -169 0 0 23 35 46 0 29 9.8 7 101 74 23 31 11 23 40 20 23 28 53 23 42 39 0.03 -168 0 0 23 24 31 0 29 11.0 8 101 73 23 19 56 23 29 5 23 17 37 23 31 24 0.03 -167 0 0 23 12 49 0 29 12.3 9 102 72 23 8 14 23 17 24 23 5 55 23 19 43 0.03 -166 0 0 23 0 40 0 29 13.7 10 102 71 22 56 5 23 5 16 22 53 45 23 7 35 0.03 -165 0 0 22 48 5 0 29 15.4 11 103 71 22 43 29 22 52 41 22 41 10 22 55 1 0.03 -164 0 0 22 35 3 0 29 17.2 12 103 70 22 30 27 22 39 40 22 28 7 22 42 0 0.03 -163 0 0 22 21 34 0 29 19.1 13 103 69 22 16 57 22 26 12 22 14 37 22 28 32 0.03 -162 0 0 22 7 39 0 29 21.2 14 104 68 22 3 1 22 12 16 22 0 41 22 14 37 0.03 -161 0 0 21 53 16 0 29 23.5 14 104 67 21 48 38 21 57 54 21 46 17 22 0 15 0.03 -160 0 0 21 38 27 0 29 25.9 15 105 66 21 33 48 21 43 5 21 31 27 21 45 26 0.03 -159 0 0 21 23 10 0 29 28.5 16 105 65 21 18 31 21 27 49 21 16 10 21 30 10 0.03 -158 0 0 21 7 27 0 29 31.3 17 105 64 21 2 47 21 12 7 21 0 26 21 14 28 0.03 -157 0 0 20 51 17 0 29 34.2 18 106 63 20 46 36 20 55 57 20 44 15 20 58 19 0.03 -156 0 0 20 34 39 0 29 37.3 19 106 62 20 29 58 20 39 20 20 27 36 20 41 42 0.03 -155 0 0 20 17 35 0 29 40.6 20 106 61 20 12 54 20 22 17 20 10 31 20 24 39 0.03 -154 0 0 20 0 4 0 29 44.0 21 107 60 19 55 22 20 4 46 19 53 0 20 7 9 0.03 -153 0 0 19 42 7 0 29 47.7 22 107 59 19 37 24 19 46 49 19 35 1 19 49 12 0.03 -152 0 0 19 23 42 0 29 51.5 23 107 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-27 59 7 -28 10 21 -27 56 51 0.02 - 14 0 0 -28 1 40 0 47 27.4 12 268 -83 -28 6 9 -27 57 10 -28 8 25 -27 54 54 0.02 - 13 0 0 -27 59 17 0 47 29.1 11 267 -84 -28 3 46 -27 54 48 -28 6 2 -27 52 32 0.02 - 12 0 0 -27 56 29 0 47 30.7 10 267 -84 -28 0 59 -27 52 0 -28 3 15 -27 49 44 0.02 - 11 0 0 -27 53 16 0 47 32.1 9 267 -84 -27 57 45 -27 48 46 -28 0 1 -27 46 30 0.02 - 10 0 0 -27 49 37 0 47 33.5 8 266 -84 -27 54 7 -27 45 7 -27 56 23 -27 42 51 0.03 - 9 0 0 -27 45 33 0 47 34.7 7 266 -84 -27 50 3 -27 41 3 -27 52 19 -27 38 47 0.03 - 8 0 0 -27 41 3 0 47 35.7 7 265 -84 -27 45 33 -27 36 33 -27 47 50 -27 34 17 0.03 - 7 0 0 -27 36 8 0 47 36.7 6 265 -84 -27 40 39 -27 31 38 -27 42 55 -27 29 22 0.03 - 6 0 0 -27 30 48 0 47 37.4 5 264 -83 -27 35 19 -27 26 18 -27 37 35 -27 24 1 0.03 - 5 0 0 -27 25 3 0 47 38.1 4 264 -83 -27 29 33 -27 20 32 -27 31 50 -27 18 15 0.04 - 4 0 0 -27 18 52 0 47 38.6 3 263 -82 -27 23 23 -27 14 21 -27 25 40 -27 12 4 0.04 - 3 0 0 -27 12 16 0 47 39.0 2 263 -81 -27 16 47 -27 7 45 -27 19 4 -27 5 28 0.05 - 2 0 0 -27 5 14 0 47 39.3 1 262 -81 -27 9 46 -27 0 43 -27 12 3 -26 58 26 0.07 - 1 0 0 -26 57 48 0 47 39.4 0 262 -80 -27 2 20 -26 53 16 -27 4 37 -26 50 59 0.24 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 4972-01334-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 38 31.1839 DE: -07 13 10.592 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 38 31.1837 DE: -07 13 10.592 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.100) * V mag [mag]: 11.6 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2209) Tianjin asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.70400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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", 0.001", 109.346° remarks: * orbital elements for (2209)Tianjin : Mean anomaly = 169.6907936705 deg Arg. of pericenter = 263.2381871317 deg Long. of node = 150.7702326804 deg Inclination = 2.6187402834 deg Eccentricity = 0.0635065441 Semimajor axis = 2.8474341077 AU Perihelion dist = 2.6666034079 AU Mag: H = 11.29, G = 0.15 Epoch of elements : MJD 60500.02665433 TDT (2024 Jul 09.0267) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,1.45,2024,7,9,0.639703,-0.007982,-0.017307,5.810864,-2.823608,0.005183,-0.002052,0.000000,0.000000 -92.0955,-7.3443,171.73,22.32,False TYC 4972-01334-1,13.64199553,-7.2196091,11.97,11.60,11.40,0.0,0,,13.66342846,-7.3443487,5.24,5.00,0,0,0 2209,Tianjin,16.83,16.554,2.7040,0,0,1.271,-9.19,,1.2,0 0,169.4802,2024,7,8,263.2382,150.7702,2.6187,0.06351,2.84743,2.66660,11.29,5.0,0.15 1.253,0.0143,0.0014,109,0.0021,Known errors,1.24,0,-1,-1 20240709_1334-1,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org