IOTA/IOTA-ES occultation update for (6545) Leitus / UCAC4 565-025997 event on 2023 Jan 24, 18:39 UT Visible from China, SW Asia, Africa Summary ------- On 2023 Jan 24 UT, the 52.1 km diameter asteroid (6545) Leitus will occult a 11.6 mag star in the constellation Gemini for observers along a path across China, SW Asia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.62 mag to 17.23 mag (the magnitude of the asteroid) for at most 3.930 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: 85 * date and approx. time of event: 2023 Jan 24, 18:31 - 2023 Jan 24, 18:47 * geocentric midpoint of event [JD]: 2459969.27737150 * magnitude of target star: 11.62 * magnitude drop [mag]: 5.62 * estimated maximum duration [s]: 3.930 * Moon: 12 % sunlit, 110° distance * Sun: 150° distance * rough path description: China, SW Asia, Africa The occultation path -------------------- * approximate projected width [km]: 53 * 1 sigma uncertainty interval [path widths]: +/- 0.60 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.003", 105°) * approx speed of asteroid's shadow [km/s]: 13.2561 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 565-025997 by 6545 Leitus on 2023 Jan 24 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 - 40 0 0 0 21 42 18 47 18.9 1 67 29 0 37 15 0 6 10 0 55 54 - 0 12 25 .... - 39 0 0 0 47 21 18 47 18.7 2 67 28 1 2 55 0 31 47 1 21 35 0 13 11 -0.19 - 38 0 0 1 13 11 18 47 18.3 3 67 27 1 28 47 0 57 37 1 47 28 0 38 59 -0.18 - 37 0 0 1 39 13 18 47 17.8 4 67 26 1 54 49 1 23 37 2 13 32 1 4 58 -0.17 - 36 0 0 2 5 25 18 47 17.1 5 67 25 2 21 3 1 49 49 2 39 46 1 31 8 -0.17 - 35 0 0 2 31 48 18 47 16.2 6 67 24 2 47 26 2 16 10 3 6 10 1 57 28 -0.17 - 34 0 0 2 58 19 18 47 15.1 7 67 23 3 13 58 2 42 41 3 32 44 2 23 58 -0.17 - 33 0 0 3 24 59 18 47 13.9 8 67 22 3 40 39 3 9 20 3 59 26 2 50 36 -0.17 - 32 0 0 3 51 47 18 47 12.5 9 67 20 4 7 28 3 36 7 4 26 16 3 17 23 -0.17 - 31 0 0 4 18 43 18 47 10.9 10 68 19 4 34 24 4 3 2 4 53 13 3 44 16 -0.17 - 30 0 0 4 45 45 18 47 9.1 11 68 18 5 1 27 4 30 3 5 20 17 4 11 17 -0.17 - 29 0 0 5 12 53 18 47 7.2 13 68 17 5 28 36 4 57 11 5 47 26 4 38 23 -0.17 - 28 0 0 5 40 6 18 47 5.1 14 68 16 5 55 49 5 24 23 6 14 40 5 5 35 -0.16 - 27 0 0 6 7 23 18 47 2.8 15 68 15 6 23 8 5 51 40 6 41 59 5 32 51 -0.16 - 26 0 0 6 34 45 18 47 0.4 16 68 14 6 50 29 6 19 1 7 9 22 6 0 12 -0.16 - 25 0 0 7 2 9 18 46 57.8 17 68 13 7 17 54 6 46 25 7 36 47 6 27 35 -0.16 - 24 0 0 7 29 36 18 46 55.0 18 68 12 7 45 22 7 13 52 8 4 15 6 55 1 -0.16 - 23 0 0 7 57 5 18 46 52.1 19 69 11 8 12 51 7 41 20 8 31 44 7 22 29 -0.16 - 22 0 0 8 24 35 18 46 49.0 20 69 10 8 40 21 8 8 49 8 59 14 7 49 59 -0.16 - 21 0 0 8 52 5 18 46 45.8 21 69 9 9 7 51 8 36 19 9 26 45 8 17 28 -0.16 - 20 0 0 9 19 34 18 46 42.4 22 69 7 9 35 21 9 3 49 9 54 15 8 44 57 -0.16 - 19 0 0 9 47 3 18 46 38.8 23 69 6 10 2 49 9 31 17 10 21 43 9 12 26 -0.16 - 18 0 0 10 14 30 18 46 35.1 24 69 5 10 30 16 9 58 44 10 49 10 9 39 52 -0.16 - 17 0 0 10 41 54 18 46 31.3 25 70 4 10 57 40 10 26 8 11 16 35 10 7 17 -0.16 - 16 0 0 11 9 15 18 46 27.3 27 70 3 11 25 1 10 53 29 11 43 56 10 34 38 -0.16 - 15 0 0 11 36 32 18 46 23.1 28 70 2 11 52 19 11 20 47 12 11 13 11 1 56 -0.16 - 14 0 0 12 3 45 18 46 18.9 29 70 1 12 19 31 11 48 0 12 38 25 11 29 9 -0.16 - 13 0 0 12 30 53 18 46 14.4 30 71 0 12 46 39 12 15 8 13 5 33 11 56 18 -0.16 - 12 0 0 12 57 56 18 46 9.9 31 71 -1 13 13 41 12 42 11 13 32 34 12 23 21 -0.16 - 11 0 0 13 24 51 18 46 5.2 32 71 -2 13 40 36 13 9 7 13 59 29 12 50 17 -0.16 - 10 0 0 13 51 40 18 46 0.4 33 72 -3 14 7 25 13 35 56 14 26 17 13 17 7 -0.16 - 9 0 0 14 18 21 18 45 55.5 34 72 -4 14 34 6 14 2 38 14 52 57 13 43 50 -0.16 - 8 0 0 14 44 55 18 45 50.5 35 72 -5 15 0 38 14 29 12 15 19 29 14 10 24 -0.16 - 7 0 0 15 11 19 18 45 45.3 36 73 -6 15 27 2 14 55 37 15 45 52 14 36 49 -0.16 - 6 0 0 15 37 34 18 45 40.0 37 73 -7 15 53 16 15 21 52 16 12 6 15 3 6 -0.16 - 5 0 0 16 3 39 18 45 34.7 38 73 -8 16 19 20 15 47 58 16 38 9 15 29 12 -0.17 - 4 0 0 16 29 33 18 45 29.2 39 74 -9 16 45 14 16 13 53 17 4 2 15 55 8 -0.17 - 3 0 0 16 55 17 18 45 23.6 40 74 -10 17 10 57 16 39 37 17 29 44 16 20 54 -0.17 - 2 0 0 17 20 49 18 45 17.9 41 74 -11 17 36 28 17 5 10 17 55 14 16 46 27 -0.17 - 1 0 0 17 46 9 18 45 12.1 42 75 -12 18 1 47 17 30 31 18 20 32 17 11 49 -0.17 0 0 0 18 11 16 18 45 6.2 43 75 -13 18 26 54 17 55 40 18 45 38 17 36 59 -0.17 1 0 0 18 36 11 18 45 0.3 44 76 -14 18 51 48 18 20 35 19 10 30 18 1 55 -0.17 2 0 0 19 0 52 18 44 54.2 45 76 -15 19 16 28 18 45 17 19 35 9 18 26 39 -0.17 3 0 0 19 25 19 18 44 48.1 46 77 -16 19 40 54 19 9 45 19 59 34 18 51 8 -0.17 4 0 0 19 49 32 18 44 41.9 47 77 -17 20 5 6 19 33 59 20 23 45 19 15 23 -0.17 5 0 0 20 13 30 18 44 35.6 48 78 -18 20 29 3 19 57 59 20 47 40 19 39 24 -0.17 6 0 0 20 37 13 18 44 29.3 49 78 -19 20 52 45 20 21 43 21 11 21 20 3 9 -0.17 7 0 0 21 0 41 18 44 22.8 50 79 -20 21 16 11 20 45 11 21 34 46 20 26 39 -0.17 8 0 0 21 23 52 18 44 16.4 51 80 -21 21 39 21 21 8 24 21 57 55 20 49 54 -0.17 9 0 0 21 46 48 18 44 9.8 52 80 -22 22 2 15 21 31 21 22 20 47 21 12 52 -0.17 10 0 0 22 9 27 18 44 3.2 53 81 -23 22 24 53 21 54 1 22 43 23 21 35 33 -0.17 11 0 0 22 31 49 18 43 56.5 54 82 -24 22 47 14 22 16 24 23 5 43 21 57 58 -0.17 12 0 0 22 53 53 18 43 49.8 55 82 -25 23 9 17 22 38 30 23 27 44 22 20 6 -0.17 13 0 0 23 15 41 18 43 43.1 56 83 -26 23 31 3 23 0 19 23 49 29 22 41 56 -0.17 14 0 0 23 37 10 18 43 36.3 57 84 -27 23 52 31 23 21 50 24 10 55 23 3 28 -0.17 15 0 0 23 58 21 18 43 29.4 57 85 -28 24 13 41 23 43 2 24 32 4 23 24 43 -0.17 16 0 0 24 19 15 18 43 22.5 58 85 -29 24 34 33 24 3 57 24 52 54 23 45 39 -0.17 17 0 0 24 39 49 18 43 15.6 59 86 -30 24 55 6 24 24 33 25 13 25 24 6 17 -0.17 18 0 0 25 0 5 18 43 8.7 60 87 -31 25 15 21 24 44 50 25 33 38 24 26 35 -0.17 19 0 0 25 20 2 18 43 1.7 61 88 -32 25 35 16 25 4 48 25 53 32 24 46 35 -0.17 20 0 0 25 39 40 18 42 54.7 62 89 -33 25 54 52 25 24 28 26 13 6 25 6 16 -0.17 21 0 0 25 58 58 18 42 47.6 63 90 -33 26 14 9 25 43 47 26 32 22 25 25 38 -0.17 22 0 0 26 17 57 18 42 40.6 64 91 -34 26 33 7 26 2 48 26 51 17 25 44 40 -0.17 23 0 0 26 36 36 18 42 33.5 65 92 -35 26 51 45 26 21 28 27 9 53 26 3 22 -0.17 24 0 0 26 54 56 18 42 26.4 65 93 -36 27 10 3 26 39 49 27 28 10 26 21 45 -0.17 25 0 0 27 12 55 18 42 19.2 66 95 -37 27 28 0 26 57 50 27 46 6 26 39 47 -0.17 26 0 0 27 30 34 18 42 12.1 67 96 -38 27 45 38 27 15 31 28 3 42 26 57 30 -0.17 27 0 0 27 47 53 18 42 5.0 68 97 -39 28 2 56 27 32 51 28 20 58 27 14 52 -0.17 28 0 0 28 4 52 18 41 57.8 69 99 -40 28 19 53 27 49 52 28 37 53 27 31 54 -0.17 29 0 0 28 21 30 18 41 50.6 69 100 -40 28 36 30 28 6 31 28 54 28 27 48 36 -0.17 30 0 0 28 37 48 18 41 43.5 70 102 -41 28 52 46 28 22 50 29 10 43 28 4 56 -0.17 31 0 0 28 53 45 18 41 36.3 71 104 -42 29 8 42 28 38 49 29 26 37 28 20 57 -0.17 32 0 0 29 9 22 18 41 29.1 72 106 -43 29 24 17 28 54 27 29 42 10 28 36 36 -0.17 33 0 0 29 24 37 18 41 21.9 73 108 -44 29 39 31 29 9 44 29 57 23 28 51 55 -0.17 34 0 0 29 39 32 18 41 14.8 73 110 -45 29 54 25 29 24 40 30 12 15 29 6 53 -0.17 35 0 0 29 54 6 18 41 7.6 74 112 -46 30 8 58 29 39 16 30 26 46 29 21 30 -0.17 36 0 0 30 8 19 18 41 0.4 75 114 -46 30 23 9 29 53 30 30 40 56 29 35 46 -0.18 37 0 0 30 22 12 18 40 53.2 75 117 -47 30 37 0 30 7 24 30 54 45 29 49 41 -0.18 38 0 0 30 35 43 18 40 46.1 76 120 -48 30 50 30 30 20 56 31 8 13 30 3 15 -0.18 39 0 0 30 48 53 18 40 38.9 76 123 -49 31 3 39 30 34 8 31 21 21 30 16 28 -0.18 40 0 0 31 1 42 18 40 31.8 77 126 -50 31 16 27 30 46 58 31 34 7 30 29 20 -0.18 41 0 0 31 14 10 18 40 24.7 78 130 -50 31 28 54 30 59 27 31 46 32 30 41 51 -0.18 42 0 0 31 26 17 18 40 17.5 78 134 -51 31 40 59 31 11 36 31 58 36 30 54 1 -0.18 43 0 0 31 38 3 18 40 10.4 78 138 -52 31 52 44 31 23 23 32 10 20 31 5 50 -0.18 44 0 0 31 49 28 18 40 3.4 79 142 -53 32 4 7 31 34 49 32 21 42 31 17 17 -0.18 45 0 0 32 0 31 18 39 56.3 79 147 -54 32 15 10 31 45 54 32 32 43 31 28 23 -0.18 46 0 0 32 11 14 18 39 49.2 79 151 -54 32 25 51 31 56 37 32 43 23 31 39 8 -0.18 47 0 0 32 21 35 18 39 42.2 80 156 -55 32 36 12 32 7 0 32 53 42 31 49 32 -0.18 48 0 0 32 31 36 18 39 35.2 80 162 -56 32 46 11 32 17 1 33 3 40 31 59 35 -0.18 49 0 0 32 41 15 18 39 28.2 80 167 -57 32 55 49 32 26 42 33 13 17 32 9 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0 23 8 47 18 31 42.8 12 290 -40 23 24 12 22 53 23 23 42 40 22 34 57 -0.18 140 0 0 22 46 26 18 31 41.0 12 290 -39 23 1 52 22 31 0 23 20 22 22 12 33 -0.18 141 0 0 22 23 46 18 31 39.4 11 290 -38 22 39 14 22 8 19 22 57 45 21 49 50 -0.18 142 0 0 22 0 48 18 31 37.9 10 291 -37 22 16 17 21 45 20 22 34 50 21 26 49 -0.19 143 0 0 21 37 32 18 31 36.6 9 291 -36 21 53 2 21 22 2 22 11 37 21 3 30 -0.19 144 0 0 21 13 58 18 31 35.4 8 292 -35 21 29 30 20 58 27 21 48 7 20 39 53 -0.19 145 0 0 20 50 7 18 31 34.3 7 292 -34 21 5 40 20 34 35 21 24 19 20 15 59 -0.20 146 0 0 20 25 59 18 31 33.4 5 292 -33 20 41 34 20 10 25 21 0 14 19 51 48 -0.20 147 0 0 20 1 35 18 31 32.6 4 293 -32 20 17 10 19 46 0 20 35 52 19 27 21 -0.21 148 0 0 19 36 54 18 31 32.0 3 293 -31 19 52 31 19 21 18 20 11 14 19 2 38 -0.23 149 0 0 19 11 58 18 31 31.6 2 293 -30 19 27 36 18 56 20 19 46 20 18 37 39 -0.25 150 0 0 18 46 46 18 31 31.3 1 294 -29 19 2 25 18 31 8 19 21 11 18 12 25 -0.32 151 0 0 18 21 20 18 31 31.1 0 294 -28 18 37 0 18 5 40 18 55 47 17 46 56 -0.81 Uncertainty in time = +/- 5 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: UCAC4 565-025997 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 19 07.4696 DE: +22 49 55.202 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 19 07.4696 DE: +22 49 55.202 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6545) Leitus asteroid class: approx. diameter [km]: 52 approx. diameter ["]: 0.018 distance from Earth [AU]: 4.05220 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 date of fit: 2022 Nov 23 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): 0.024", 0.003", 105.32° remarks: * orbital elements for (6545)Leitus : Mean anomaly = 30.5084140038 deg Arg. of pericenter = 148.3585160243 deg Long. of node = 278.0261618389 deg Inclination = 11.9798860014 deg Eccentricity = 0.0527649752 Semimajor axis = 5.1615377680 AU Perihelion dist = 4.8891893556 AU Mag: H = 10.26, G = 0.15 Epoch of elements : MJD 59968.77722222 TDT (2023 Jan 24.7772) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442022Nov23,3.93,2023,1,24,18.656916,-0.029208,0.169601,-7.373299,-1.271291,0.003098,-0.000058,0.000001,0.000000 51.4544,22.8227,-96.83,-19.13,False UCAC4 565-025997,6.31874157,22.8320006,0.00,11.62,0.00,0.0,0,,6.34221833,22.8227392,5.62,0.00,0,0,0 6545,Leitus,17.23,52.1,4.0522,0,0,-1.157,-2.76,,4.6,0 0,30.4431,2023,1,24,148.3585,278.0262,11.9799,0.05276,5.16154,4.88919,10.27,5.0,0.15 1.599,0.0243,0.0027,105,0.0106,Known errors,-1.00,-1,-1,-1 20230124_025997,59914.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org