IOTA/IOTA-ES occultation update for (35) Leukothea / TYC 6375-00154-1 event on 2022 May 19, 09:22 UT Visible from South America Summary ------- On 2022 May 19 UT, the 106.1 km diameter asteroid (35) Leukothea will occult a 10.9 mag star in the constellation Capricornus for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.16 mag to 14.02 mag (the magnitude of the asteroid) for at most 8.850 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: 2022 May 19, 09:13 - 2022 May 19, 09:31 * geocentric midpoint of event [JD]: 2459718.89070255 * magnitude of target star: 10.92 * magnitude drop [mag]: 3.16 * estimated maximum duration [s]: 8.850 * Moon: 86 % sunlit, 40° distance * Sun: 96° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 106 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.004", 62°) * approx speed of asteroid's shadow [km/s]: 11.9891 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6375-00154-1 by 35 Leukothea on 2022 May 19 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 -143 0 0 -11 49 47 9 13 45.2 0 111 -81 -12 20 39 .. .. .. -12 27 8 .. .. .. .... -142 0 0 -12 12 36 9 13 45.3 1 111 -82 -12 43 26 -11 41 47 -12 49 54 -11 35 19 0.11 -141 0 0 -12 35 9 9 13 45.6 2 111 -82 -13 5 56 -12 4 22 -13 12 24 -11 57 55 0.06 -140 0 0 -12 57 25 9 13 46.0 3 111 -83 -13 28 9 -12 26 41 -13 34 36 -12 20 14 0.04 -139 0 0 -13 19 23 9 13 46.7 4 110 -83 -13 50 5 -12 48 42 -13 56 31 -12 42 16 0.03 -138 0 0 -13 41 4 9 13 47.5 5 110 -84 -14 11 42 -13 10 25 -14 18 8 -13 3 59 0.03 -137 0 0 -14 2 26 9 13 48.5 6 110 -84 -14 33 2 -13 31 50 -14 39 27 -13 25 25 0.02 -136 0 0 -14 23 29 9 13 49.7 7 110 -84 -14 54 2 -13 52 56 -15 0 27 -13 46 32 0.02 -135 0 0 -14 44 14 9 13 51.0 8 109 -83 -15 14 44 -14 13 44 -15 21 8 -14 7 20 0.02 -134 0 0 -15 4 39 9 13 52.5 9 109 -83 -15 35 6 -14 34 12 -15 41 29 -14 27 48 0.01 -133 0 0 -15 24 44 9 13 54.2 11 109 -82 -15 55 8 -14 54 20 -16 1 31 -14 47 57 0.01 -132 0 0 -15 44 29 9 13 56.0 12 109 -82 -16 14 51 -15 14 8 -16 21 13 -15 7 46 0.01 -131 0 0 -16 3 54 9 13 58.0 13 108 -81 -16 34 13 -15 33 36 -16 40 34 -15 27 14 0.01 -130 0 0 -16 22 59 9 14 0.1 14 108 -80 -16 53 14 -15 52 43 -16 59 35 -15 46 22 0.01 -129 0 0 -16 41 42 9 14 2.4 15 108 -80 -17 11 54 -16 11 30 -17 18 14 -16 5 9 0.01 -128 0 0 -17 0 4 9 14 4.9 16 107 -79 -17 30 13 -16 29 55 -17 36 33 -16 23 35 0.01 -127 0 0 -17 18 5 9 14 7.5 17 107 -78 -17 48 11 -16 47 58 -17 54 30 -16 41 39 0.01 -126 0 0 -17 35 44 9 14 10.3 18 107 -77 -18 5 47 -17 5 40 -18 12 5 -16 59 22 0.01 -125 0 0 -17 53 1 9 14 13.2 19 107 -76 -18 23 1 -17 23 0 -18 29 19 -17 16 43 0.01 -124 0 0 -18 9 56 9 14 16.2 20 106 -75 -18 39 53 -17 39 58 -18 46 10 -17 33 41 0.00 -123 0 0 -18 26 28 9 14 19.4 21 106 -74 -18 56 23 -17 56 34 -19 2 39 -17 50 17 0.00 -122 0 0 -18 42 38 9 14 22.8 22 106 -73 -19 12 30 -18 12 47 -19 18 46 -18 6 31 0.00 -121 0 0 -18 58 26 9 14 26.3 23 105 -72 -19 28 14 -18 28 37 -19 34 29 -18 22 22 0.00 -120 0 0 -19 13 50 9 14 29.9 24 105 -72 -19 43 36 -18 44 4 -19 49 50 -18 37 49 0.00 -119 0 0 -19 28 51 9 14 33.7 25 105 -71 -19 58 34 -18 59 8 -20 4 48 -18 52 54 0.00 -118 0 0 -19 43 29 9 14 37.6 26 104 -70 -20 13 9 -19 13 49 -20 19 23 -19 7 36 0.00 -117 0 0 -19 57 44 9 14 41.6 27 104 -69 -20 27 21 -19 28 6 -20 33 34 -19 21 53 0.00 -116 0 0 -20 11 35 9 14 45.8 28 104 -68 -20 41 9 -19 42 0 -20 47 21 -19 35 48 0.00 -115 0 0 -20 25 2 9 14 50.1 29 103 -67 -20 54 34 -19 55 30 -21 0 46 -19 49 18 0.00 -114 0 0 -20 38 6 9 14 54.5 30 103 -66 -21 7 35 -20 8 36 -21 13 46 -20 2 25 0.00 -113 0 0 -20 50 45 9 14 59.0 31 103 -65 -21 20 12 -20 21 19 -21 26 23 -20 15 8 0.00 -112 0 0 -21 3 1 9 15 3.7 31 102 -64 -21 32 25 -20 33 37 -21 38 35 -20 27 27 0.00 -111 0 0 -21 14 53 9 15 8.5 32 102 -63 -21 44 14 -20 45 31 -21 50 24 -20 39 21 0.00 -110 0 0 -21 26 20 9 15 13.4 33 101 -62 -21 55 39 -20 57 1 -22 1 48 -20 50 52 0.00 -109 0 0 -21 37 23 9 15 18.4 34 101 -61 -22 6 40 -21 8 6 -22 12 49 -21 1 58 0.00 -108 0 0 -21 48 2 9 15 23.5 35 101 -60 -22 17 16 -21 18 47 -22 23 24 -21 12 39 0.00 -107 0 0 -21 58 16 9 15 28.7 36 100 -59 -22 27 28 -21 29 4 -22 33 36 -21 22 56 0.00 -106 0 0 -22 8 6 9 15 34.1 37 100 -58 -22 37 16 -21 38 56 -22 43 23 -21 32 49 0.00 -105 0 0 -22 17 31 9 15 39.6 38 100 -57 -22 46 39 -21 48 23 -22 52 46 -21 42 16 0.00 -104 0 0 -22 26 32 9 15 45.1 39 99 -57 -22 55 38 -21 57 26 -23 1 44 -21 51 19 0.00 -103 0 0 -22 35 8 9 15 50.8 40 99 -56 -23 4 12 -22 6 4 -23 10 18 -21 59 58 0.00 -102 0 0 -22 43 19 9 15 56.6 41 98 -55 -23 12 21 -22 14 17 -23 18 27 -22 8 11 0.00 -101 0 0 -22 51 5 9 16 2.5 42 98 -54 -23 20 6 -22 22 5 -23 26 11 -22 16 0 -0.01 -100 0 0 -22 58 27 9 16 8.5 43 98 -53 -23 27 25 -22 29 28 -23 33 30 -22 23 23 -0.01 - 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0 8 9 0.01 2 0 0 - 0 18 30 9 30 4.1 33 245 51 - 0 50 14 0 13 15 - 0 56 54 0 19 54 0.01 3 0 0 0 9 33 9 30 9.7 32 245 52 - 0 22 11 0 41 18 - 0 28 50 0 47 57 0.01 4 0 0 0 37 36 9 30 15.1 31 245 53 0 5 52 1 9 20 - 0 0 48 1 15 59 0.01 5 0 0 1 5 37 9 30 20.3 29 245 54 0 33 53 1 37 21 0 27 14 1 44 0 0.01 6 0 0 1 33 36 9 30 25.3 28 245 55 1 1 52 2 5 19 0 55 13 2 11 58 0.01 7 0 0 2 1 32 9 30 30.1 27 245 56 1 29 49 2 33 15 1 23 10 2 39 54 0.01 8 0 0 2 29 24 9 30 34.8 26 245 57 1 57 42 3 1 6 1 51 3 3 7 45 0.01 9 0 0 2 57 12 9 30 39.3 25 245 58 2 25 31 3 28 53 2 18 52 3 35 32 0.01 10 0 0 3 24 55 9 30 43.6 24 245 59 2 53 14 3 56 35 2 46 36 4 3 14 0.01 11 0 0 3 52 31 9 30 47.6 23 246 61 3 20 52 4 24 11 3 14 14 4 30 49 0.01 12 0 0 4 20 2 9 30 51.5 22 246 62 3 48 24 4 51 40 3 41 45 4 58 18 0.01 13 0 0 4 47 24 9 30 55.2 21 246 63 4 15 48 5 19 1 4 9 10 5 25 39 0.01 14 0 0 5 14 39 9 30 58.7 19 246 64 4 43 4 5 46 14 4 36 26 5 52 52 0.01 15 0 0 5 41 45 9 31 2.1 18 246 65 5 10 12 6 13 19 5 3 34 6 19 56 0.01 16 0 0 6 8 42 9 31 5.2 17 246 66 5 37 10 6 40 14 5 30 33 6 46 51 0.01 17 0 0 6 35 29 9 31 8.1 16 246 67 6 3 58 7 6 59 5 57 22 7 13 35 0.01 18 0 0 7 2 5 9 31 10.8 15 246 68 6 30 36 7 33 33 6 24 0 7 40 9 0.01 19 0 0 7 28 29 9 31 13.4 14 246 69 6 57 3 7 59 55 6 50 27 8 6 31 0.02 20 0 0 7 54 42 9 31 15.7 13 246 70 7 23 18 8 26 6 7 16 42 8 32 42 0.02 21 0 0 8 20 42 9 31 17.9 12 247 71 7 49 20 8 52 4 7 42 45 8 58 39 0.02 22 0 0 8 46 30 9 31 19.8 11 247 72 8 15 10 9 17 49 8 8 35 9 24 24 0.02 23 0 0 9 12 3 9 31 21.6 10 247 73 8 40 46 9 43 21 8 34 12 9 49 55 0.02 24 0 0 9 37 23 9 31 23.1 8 247 74 9 6 8 10 8 38 8 59 34 10 15 11 0.02 25 0 0 10 2 28 9 31 24.5 7 247 75 9 31 15 10 33 40 9 24 42 10 40 13 0.02 26 0 0 10 27 18 9 31 25.7 6 247 76 9 56 7 10 58 27 9 49 35 11 5 0 0.03 27 0 0 10 51 52 9 31 26.7 5 248 77 10 20 44 11 22 59 10 14 12 11 29 31 0.03 28 0 0 11 16 10 9 31 27.5 4 248 78 10 45 5 11 47 14 10 38 34 11 53 46 0.04 29 0 0 11 40 11 9 31 28.1 3 248 79 11 9 9 12 11 13 11 2 38 12 17 44 0.05 30 0 0 12 3 56 9 31 28.6 2 248 80 11 32 56 12 34 55 11 26 26 12 41 25 0.07 31 0 0 12 27 23 9 31 28.9 1 248 81 11 56 27 12 58 19 11 49 57 13 4 49 0.13 Uncertainty in time = +/- 3 secs Prediction of 2022 Apr 15.8 Data for the target star ------------------------ * name: TYC 6375-00154-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 46 07.3618 DE: -20 53 47.166 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 46 07.3620 DE: -20 53 47.165 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (35) Leukothea asteroid class: approx. diameter [km]: 106 approx. diameter ["]: 0.056 distance from Earth [AU]: 2.59210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#68 date of fit: 2022 Apr 11 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): 0.016", 0.004", 62.043° remarks: * orbital elements for (35)Leukothea : Mean anomaly = 67.9473769033 deg Arg. of pericenter = 213.5106435940 deg Long. of node = 353.7151285409 deg Inclination = 7.9335265716 deg Eccentricity = 0.2248151877 Semimajor axis = 2.9932188145 AU Perihelion dist = 2.3202977649 AU Mag: H = 8.74, G = 0.15 Epoch of elements : MJD 59718.39083333 TDT (2022 May 19.3908) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#682022Apr11,8.85,2022,5,19,9.376861,-0.002777,0.009532,6.590926,1.533434,-0.005277,-0.001799,0.000000,0.000000 -50.8435,-20.7936,38.47,19.80,False TYC 6375-00154-1,21.76871165,-20.8964349,0.00,10.92,0.00,0.0,0,,21.78935008,-20.7936214,3.16,0.00,0,0,0 35,Leukothea,14.02,106.1,2.5921,0,0,1.595,5.21,,6.0 0,67.8730,2022,5,19,213.5106,353.7151,7.9335,0.22482,2.99322,2.32030,8.64,5.0,0.15 1.105,0.0163,0.0043,62,0.0059,Known errors,-1.00,-1,-1,-1 20220519_0154-1,59684.83 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Apr 15, 19:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org