IOTA/IOTA-ES occultation update for (4741) Leskov / UCAC4 327-120441 event on 2024 Jul 11, 00:55 UT Visible from Summary ------- On 2024 Jul 11 UT, the 16.7448614004337 km diameter asteroid (4741) Leskov will occult a 10.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.99 mag to 16.87 mag (the magnitude of the asteroid) for at most 1.650 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: 97 * date and approx. time of event: 2024 Jul 11, 00:44 - 2024 Jul 11, 01:05 * geocentric midpoint of event [JD]: 2460502.53823583 * magnitude of target star: 10.88 * magnitude drop [mag]: 5.99 * estimated maximum duration [s]: 1.650 * Moon: 23 % sunlit, 104° distance * Sun: 161° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 4.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.032, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.004", 91°) * approx speed of asteroid's shadow [km/s]: 10.2384 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 327-120441 by 4741 Leskov on 2024 Jul 11 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 -131 0 0 -13 16 1 1 5 11.4 0 115 18 -13 10 51 -13 21 12 -13 6 47 -13 25 16 .... -130 0 0 -13 43 54 1 5 11.2 1 115 17 -13 38 44 -13 49 5 -13 34 40 -13 53 9 0.24 -129 0 0 -14 11 42 1 5 10.8 2 115 16 -14 6 32 -14 16 53 -14 2 28 -14 20 57 0.22 -128 0 0 -14 39 25 1 5 10.2 3 115 15 -14 34 15 -14 44 36 -14 30 11 -14 48 40 0.22 -127 0 0 -15 7 3 1 5 9.4 4 114 14 -15 1 52 -15 12 13 -14 57 49 -15 16 17 0.21 -126 0 0 -15 34 33 1 5 8.4 6 114 13 -15 29 23 -15 39 44 -15 25 20 -15 43 47 0.21 -125 0 0 -16 1 57 1 5 7.1 7 114 12 -15 56 47 -16 7 7 -15 52 43 -16 11 11 0.21 -124 0 0 -16 29 12 1 5 5.7 8 114 11 -16 24 2 -16 34 22 -16 19 59 -16 38 26 0.21 -123 0 0 -16 56 19 1 5 4.0 9 113 10 -16 51 10 -17 1 29 -16 47 6 -17 5 33 0.21 -122 0 0 -17 23 17 1 5 2.1 10 113 9 -17 18 8 -17 28 27 -17 14 5 -17 32 30 0.21 -121 0 0 -17 50 5 1 5 0.0 11 113 8 -17 44 56 -17 55 15 -17 40 53 -17 59 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0 45 16.5 15 248 -32 -16 5 8 -16 15 27 -16 1 5 -16 19 31 0.22 52 0 0 -15 43 7 0 45 13.7 14 248 -31 -15 37 57 -15 48 17 -15 33 54 -15 52 21 0.22 53 0 0 -15 15 49 0 45 11.0 12 247 -30 -15 10 39 -15 20 59 -15 6 36 -15 25 3 0.23 54 0 0 -14 48 25 0 45 8.5 11 247 -29 -14 43 15 -14 53 35 -14 39 12 -14 57 39 0.23 55 0 0 -14 20 55 0 45 6.3 10 247 -28 -14 15 45 -14 26 5 -14 11 41 -14 30 9 0.23 56 0 0 -13 53 19 0 45 4.3 9 247 -27 -13 48 9 -13 58 29 -13 44 5 -14 2 33 0.23 57 0 0 -13 25 39 0 45 2.4 8 246 -26 -13 20 29 -13 30 49 -13 16 25 -13 34 53 0.24 58 0 0 -12 57 55 0 45 0.8 7 246 -25 -12 52 45 -13 3 5 -12 48 41 -13 7 9 0.24 59 0 0 -12 30 7 0 44 59.5 6 246 -24 -12 24 57 -12 35 18 -12 20 54 -12 39 22 0.25 60 0 0 -12 2 18 0 44 58.3 5 246 -23 -11 57 8 -12 7 28 -11 53 4 -12 11 32 0.26 61 0 0 -11 34 26 0 44 57.3 4 246 -22 -11 29 16 -11 39 36 -11 25 12 -11 43 40 0.27 62 0 0 -11 6 33 0 44 56.6 3 245 -21 -11 1 23 -11 11 43 -10 57 20 -11 15 47 0.30 63 0 0 -10 38 40 0 44 56.1 2 245 -20 -10 33 30 -10 43 50 -10 29 27 -10 47 54 0.35 64 0 0 -10 10 48 0 44 55.9 1 245 -19 -10 5 38 -10 15 57 -10 1 34 -10 20 1 0.59 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 327-120441 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 01 21.4967 DE: -24 41 25.841 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 01 21.4967 DE: -24 41 25.841 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4741) Leskov asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.012 distance from Earth [AU]: 1.95980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.032", 0.004", 91.21° remarks: * orbital elements for (4741)Leskov : Mean anomaly = 309.6348142563 deg Arg. of pericenter = 279.6089123302 deg Long. of node = 64.5530805276 deg Inclination = 1.5682883638 deg Eccentricity = 0.1706378551 Semimajor axis = 3.2270588020 AU Perihelion dist = 2.6764004098 AU Mag: H = 12.58, G = 0.15 Epoch of elements : MJD 60502.03823579 TDT (2024 Jul 11.0382) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr25,1.65,2024,7,11,0.917660,0.006953,-0.218650,-5.775952,-0.182964,0.001811,0.000124,0.000001,0.000000 -32.4772,-24.6917,167.63,22.06,False UCAC4 327-120441,18.02263798,-24.6905114,11.53,10.88,10.53,0.1,0,,18.04811516,-24.6916601,6.00,5.90,0,0,0 4741,Leskov,16.87,16.887,1.9598,0,0,-1.901,-0.82,,1.2,0 0,309.4583,2024,7,10,279.6089,64.5531,1.5683,0.17064,3.22706,2.67640,12.58,5.0,0.15 1.393,0.0323,0.0043,91,0.0047,Known errors,0.79,0,-1,-1 20240711_120441,60140.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org