IOTA/IOTA-ES occultation update for (9037) 1990 UJ2 / TYC 6342-02013-1 event on 2024 Oct 12, 19:20 UT Visible from Summary ------- On 2024 Oct 12 UT, the 9.71203642879547 km diameter asteroid (9037) 1990 UJ2 will occult a 10.6 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.07 mag to 17.66 mag (the magnitude of the asteroid) for at most 0.880 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: 98 * date and approx. time of event: 2024 Oct 12, 19:11 - 2024 Oct 12, 19:29 * geocentric midpoint of event [JD]: 2460596.30592083 * magnitude of target star: 10.59 * magnitude drop [mag]: 7.07 * estimated maximum duration [s]: 0.880 * Moon: 71 % sunlit, 9° distance * Sun: 107° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 10 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.003", 83°) * approx speed of asteroid's shadow [km/s]: 11.1636 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6342-02013-1 by 9037 1990 UJ2 on 2024 Oct 12 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 -100 0 0 -25 45 29 19 11 28.7 1 113 69 -25 48 32 -25 42 25 -25 50 47 -25 40 10 .... - 99 0 0 -26 8 31 19 11 28.9 2 112 68 -26 11 34 -26 5 28 -26 13 49 -26 3 13 0.33 - 98 0 0 -26 31 22 19 11 29.3 2 112 67 -26 34 25 -26 28 19 -26 36 40 -26 26 4 0.33 - 97 0 0 -26 54 1 19 11 29.8 3 112 67 -26 57 4 -26 50 58 -26 59 18 -26 48 43 0.33 - 96 0 0 -27 16 27 19 11 30.5 4 111 66 -27 19 30 -27 13 24 -27 21 44 -27 11 10 0.34 - 95 0 0 -27 38 40 19 11 31.4 5 111 65 -27 41 43 -27 35 37 -27 43 57 -27 33 23 0.34 - 94 0 0 -28 0 40 19 11 32.5 6 110 64 -28 3 42 -27 57 37 -28 5 57 -27 55 23 0.34 - 93 0 0 -28 22 26 19 11 33.7 7 110 63 -28 25 28 -28 19 24 -28 27 42 -28 17 10 0.34 - 92 0 0 -28 43 57 19 11 35.0 8 109 62 -28 47 0 -28 40 55 -28 49 14 -28 38 42 0.34 - 91 0 0 -29 5 14 19 11 36.6 9 109 61 -29 8 16 -29 2 13 -29 10 30 -28 59 59 0.34 - 90 0 0 -29 26 16 19 11 38.2 10 108 61 -29 29 18 -29 23 15 -29 31 32 -29 21 1 0.34 - 89 0 0 -29 47 3 19 11 40.1 11 108 60 -29 50 4 -29 44 2 -29 52 18 -29 41 48 0.34 - 88 0 0 -30 7 34 19 11 42.1 12 107 59 -30 10 35 -30 4 33 -30 12 48 -30 2 20 0.34 - 87 0 0 -30 27 49 19 11 44.2 13 107 58 -30 30 50 -30 24 48 -30 33 3 -30 22 35 0.34 - 86 0 0 -30 47 47 19 11 46.5 14 106 57 -30 50 48 -30 44 47 -30 53 1 -30 42 34 0.34 - 85 0 0 -31 7 29 19 11 48.9 15 106 56 -31 10 29 -31 4 29 -31 12 42 -31 2 16 0.34 - 84 0 0 -31 26 54 19 11 51.5 16 105 55 -31 29 54 -31 23 54 -31 32 6 -31 21 41 0.34 - 83 0 0 -31 46 1 19 11 54.2 17 104 54 -31 49 1 -31 43 1 -31 51 13 -31 40 49 0.34 - 82 0 0 -32 4 51 19 11 57.0 18 104 53 -32 7 50 -32 1 51 -32 10 2 -31 59 39 0.34 - 81 0 0 -32 23 23 19 12 0.0 18 103 53 -32 26 22 -32 20 24 -32 28 34 -32 18 12 0.34 - 80 0 0 -32 41 37 19 12 3.1 19 103 52 -32 44 36 -32 38 38 -32 46 48 -32 36 27 0.34 - 79 0 0 -32 59 33 19 12 6.3 20 102 51 -33 2 32 -32 56 34 -33 4 43 -32 54 23 0.34 - 78 0 0 -33 17 10 19 12 9.6 21 102 50 -33 20 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49 -16 34 6 0.36 69 0 0 -16 13 39 19 28 56.0 21 253 -66 -16 16 44 -16 10 34 -16 19 0 -16 8 18 0.36 70 0 0 -15 47 53 19 28 59.9 20 253 -66 -15 50 58 -15 44 48 -15 53 14 -15 42 32 0.36 71 0 0 -15 22 11 19 29 3.5 19 253 -66 -15 25 16 -15 19 6 -15 27 32 -15 16 50 0.36 72 0 0 -14 56 32 19 29 7.0 17 252 -66 -14 59 37 -14 53 28 -15 1 53 -14 51 12 0.36 73 0 0 -14 30 59 19 29 10.3 16 252 -66 -14 34 3 -14 27 54 -14 36 19 -14 25 38 0.36 74 0 0 -14 5 30 19 29 13.3 15 252 -66 -14 8 34 -14 2 26 -14 10 50 -14 0 10 0.36 75 0 0 -13 40 7 19 29 16.2 14 252 -66 -13 43 12 -13 37 3 -13 45 27 -13 34 48 0.36 76 0 0 -13 14 52 19 29 18.9 13 251 -66 -13 17 56 -13 11 48 -13 20 11 -13 9 32 0.37 77 0 0 -12 49 43 19 29 21.3 12 251 -66 -12 52 47 -12 46 39 -12 55 2 -12 44 24 0.37 78 0 0 -12 24 42 19 29 23.6 11 251 -66 -12 27 46 -12 21 39 -12 30 1 -12 19 24 0.37 79 0 0 -11 59 50 19 29 25.7 10 251 -65 -12 2 54 -11 56 47 -12 5 9 -11 54 32 0.37 80 0 0 -11 35 7 19 29 27.5 9 250 -65 -11 38 11 -11 32 4 -11 40 25 -11 29 50 0.38 81 0 0 -11 10 34 19 29 29.1 8 250 -65 -11 13 37 -11 7 31 -11 15 52 -11 5 17 0.38 82 0 0 -10 46 12 19 29 30.6 7 250 -64 -10 49 14 -10 43 9 -10 51 29 -10 40 55 0.39 83 0 0 -10 22 0 19 29 31.8 6 250 -64 -10 25 2 -10 18 58 -10 27 17 -10 16 43 0.40 84 0 0 - 9 58 0 19 29 32.8 5 250 -63 -10 1 2 - 9 54 58 -10 3 16 - 9 52 44 0.41 85 0 0 - 9 34 12 19 29 33.6 4 250 -63 - 9 37 14 - 9 31 10 - 9 39 28 - 9 28 56 0.43 86 0 0 - 9 10 37 19 29 34.2 3 249 -62 - 9 13 38 - 9 7 35 - 9 15 52 - 9 5 21 0.47 87 0 0 - 8 47 14 19 29 34.6 1 249 -62 - 8 50 16 - 8 44 13 - 8 52 29 - 8 42 0 0.56 88 0 0 - 8 24 6 19 29 34.8 0 249 -61 - 8 27 7 - 8 21 5 - 8 29 20 - 8 18 52 1.09 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6342-02013-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 36 40.3812 DE: -20 50 29.905 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 36 40.3812 DE: -20 50 29.905 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.6 * B mag [mag]: 11.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9037) 1990 UJ2 asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.008 distance from Earth [AU]: 1.59890 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#42 date of fit: 2023 Apr 25 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): 0.021", 0.003", 82.859° remarks: * orbital elements for (9037)1990 UJ2 : Mean anomaly = 344.5609224167 deg Arg. of pericenter = 224.5053280679 deg Long. of node = 132.9549542234 deg Inclination = 4.7973870857 deg Eccentricity = 0.2158444962 Semimajor axis = 2.6517170163 AU Perihelion dist = 2.0793584930 AU Mag: H = 13.82, G = 0.15 Epoch of elements : MJD 60595.80592063 TDT (2024 Oct 12.8059) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#422023Apr25,0.88,2024,10,12,19.342100,0.049612,-0.305453,6.218955,1.013904,0.004998,0.001371,0.000000,0.000000 -2.4595,-20.7562,-113.56,-7.80,False TYC 6342-02013-1,20.61121703,-20.8416402,11.51,10.59,10.09,0.1,0,,20.63519027,-20.7561979,7.08,7.12,0,0,0 9037,1990 UJ2,17.66,9.828,1.5989,0,0,2.440,5.58,,1.0,0 0,344.3770,2024,10,12,224.5053,132.9550,4.7974,0.21584,2.65172,2.07936,13.81,5.0,0.15 1.368,0.0207,0.0030,83,0.0031,Known errors,1.06,0,-1,-1 20241012_2013-1,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org