IOTA/IOTA-ES occultation update for (2342) Lebedev / HIP 85254 event on 2024 Oct 15, 19:47 UT Visible from Summary ------- On 2024 Oct 15 UT, the 21.8084045555545 km diameter asteroid (2342) Lebedev will occult a 9.2 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.32 mag to 18.56 mag (the magnitude of the asteroid) for at most 0.740 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: 93 * date and approx. time of event: 2024 Oct 15, 19:44 - 2024 Oct 15, 19:51 * geocentric midpoint of event [JD]: 2460599.32477729 * magnitude of target star: 9.24 * magnitude drop [mag]: 9.32 * estimated maximum duration [s]: 0.740 * Moon: 96 % sunlit, 98° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.004", 97°) * approx speed of asteroid's shadow [km/s]: 29.8668 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 85254 by 2342 Lebedev on 2024 Oct 15 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 -153 0 0 - 9 10 24 19 44 12.6 0 113 57 - 9 17 7 - 9 3 42 - 9 23 37 .. .. .. .... -152 0 0 - 9 36 1 19 44 12.7 1 113 58 - 9 42 44 - 9 29 18 - 9 49 14 - 9 22 49 0.26 -151 0 0 -10 1 44 19 44 12.8 2 113 59 -10 8 27 - 9 55 0 -10 14 57 - 9 48 31 0.25 -150 0 0 -10 27 30 19 44 13.0 3 113 60 -10 34 14 -10 20 47 -10 40 45 -10 14 17 0.25 -149 0 0 -10 53 21 19 44 13.3 4 112 61 -11 0 5 -10 46 37 -11 6 36 -10 40 7 0.25 -148 0 0 -11 19 15 19 44 13.6 5 112 62 -11 25 59 -11 12 31 -11 32 30 -11 6 1 0.25 -147 0 0 -11 45 11 19 44 14.0 7 112 63 -11 51 56 -11 38 27 -11 58 27 -11 31 57 0.25 -146 0 0 -12 11 9 19 44 14.5 8 112 64 -12 17 54 -12 4 25 -12 24 25 -11 57 55 0.25 -145 0 0 -12 37 9 19 44 15.1 9 112 65 -12 43 54 -12 30 25 -12 50 25 -12 23 54 0.25 -144 0 0 -13 3 9 19 44 15.8 10 111 66 -13 9 54 -12 56 24 -13 16 25 -12 49 53 0.25 -143 0 0 -13 29 9 19 44 16.5 11 111 67 -13 35 54 -13 22 24 -13 42 25 -13 15 53 0.25 -142 0 0 -13 55 8 19 44 17.3 12 111 68 -14 1 53 -13 48 23 -14 8 24 -13 41 52 0.25 -141 0 0 -14 21 5 19 44 18.2 13 111 68 -14 27 50 -14 14 21 -14 34 22 -14 7 50 0.25 -140 0 0 -14 47 1 19 44 19.1 14 110 69 -14 53 46 -14 40 16 -15 0 17 -14 33 45 0.25 -139 0 0 -15 12 53 19 44 20.2 15 110 70 -15 19 38 -15 6 9 -15 26 10 -14 59 38 0.24 -138 0 0 -15 38 43 19 44 21.3 16 110 71 -15 45 27 -15 31 58 -15 51 59 -15 25 27 0.24 -137 0 0 -16 4 28 19 44 22.4 17 110 72 -16 11 12 -15 57 43 -16 17 44 -15 51 12 0.24 -136 0 0 -16 30 8 19 44 23.6 18 109 72 -16 36 53 -16 23 23 -16 43 24 -16 16 52 0.24 -135 0 0 -16 55 43 19 44 24.9 19 109 73 -17 2 27 -16 48 58 -17 8 59 -16 42 27 0.24 -134 0 0 -17 21 11 19 44 26.3 20 109 74 -17 27 56 -17 14 27 -17 34 27 -17 7 56 0.24 -133 0 0 -17 46 34 19 44 27.7 21 108 74 -17 53 18 -17 39 49 -17 59 49 -17 33 19 0.24 -132 0 0 -18 11 48 19 44 29.2 22 108 75 -18 18 32 -18 5 4 -18 25 3 -17 58 34 0.24 -131 0 0 -18 36 55 19 44 30.8 23 108 75 -18 43 39 -18 30 12 -18 50 10 -18 23 41 0.24 -130 0 0 -19 1 54 19 44 32.4 24 107 76 -19 8 37 -18 55 10 -19 15 8 -18 48 40 0.24 -129 0 0 -19 26 43 19 44 34.1 25 107 76 -19 33 27 -19 20 0 -19 39 57 -19 13 30 0.24 -128 0 0 -19 51 23 19 44 35.8 26 106 76 -19 58 6 -19 44 40 -20 4 36 -19 38 11 0.24 -127 0 0 -20 15 52 19 44 37.6 28 106 77 -20 22 35 -20 9 10 -20 29 5 -20 2 41 0.24 -126 0 0 -20 40 11 19 44 39.5 29 106 77 -20 46 54 -20 33 29 -20 53 23 -20 27 0 0.24 -125 0 0 -21 4 19 19 44 41.4 30 105 77 -21 11 1 -20 57 37 -21 17 30 -20 51 8 0.24 -124 0 0 -21 28 14 19 44 43.3 31 105 77 -21 34 56 -21 21 33 -21 41 25 -21 15 5 0.24 -123 0 0 -21 51 58 19 44 45.3 32 104 77 -21 58 39 -21 45 16 -22 5 7 -21 38 49 0.24 -122 0 0 -22 15 28 19 44 47.4 33 104 77 -22 22 9 -22 8 47 -22 28 37 -22 2 20 0.24 -121 0 0 -22 38 45 19 44 49.5 34 103 76 -22 45 26 -22 32 5 -22 51 53 -22 25 38 0.24 -120 0 0 -23 1 49 19 44 51.7 35 103 76 -23 8 29 -22 55 9 -23 14 56 -22 48 42 0.24 -119 0 0 -23 24 38 19 44 53.9 36 102 76 -23 31 18 -23 17 59 -23 37 44 -23 11 33 0.24 -118 0 0 -23 47 13 19 44 56.1 37 102 75 -23 53 52 -23 40 34 -24 0 18 -23 34 8 0.24 -117 0 0 -24 9 32 19 44 58.4 37 101 75 -24 16 11 -24 2 54 -24 22 36 -23 56 29 0.24 -116 0 0 -24 31 36 19 45 0.8 38 101 74 -24 38 14 -24 24 58 -24 44 40 -24 18 34 0.24 -115 0 0 -24 53 25 19 45 3.2 39 100 73 -25 0 2 -24 46 47 -25 6 27 -24 40 23 0.24 -114 0 0 -25 14 57 19 45 5.6 40 100 73 -25 21 34 -25 8 20 -25 27 58 -25 1 56 0.24 -113 0 0 -25 36 12 19 45 8.0 41 99 72 -25 42 49 -25 29 36 -25 49 12 -25 23 13 0.24 -112 0 0 -25 57 11 19 45 10.5 42 98 71 -26 3 47 -25 50 35 -26 10 10 -25 44 13 0.24 -111 0 0 -26 17 52 19 45 13.1 43 98 71 -26 24 27 -26 11 17 -26 30 50 -26 4 55 0.24 -110 0 0 -26 38 16 19 45 15.6 44 97 70 -26 44 51 -26 31 41 -26 51 12 -26 25 20 0.24 -109 0 0 -26 58 22 19 45 18.2 45 96 69 -27 4 56 -26 51 48 -27 11 17 -26 45 27 0.24 -108 0 0 -27 18 10 19 45 20.8 46 96 68 -27 24 43 -27 11 36 -27 31 4 -27 5 16 0.24 -107 0 0 -27 37 39 19 45 23.5 47 95 68 -27 44 12 -27 31 6 -27 50 32 -27 24 47 0.24 -106 0 0 -27 56 50 19 45 26.2 48 94 67 -28 3 22 -27 50 18 -28 9 42 -27 43 59 0.24 -105 0 0 -28 15 42 19 45 28.9 49 93 66 -28 22 14 -28 9 11 -28 28 33 -28 2 52 0.24 -104 0 0 -28 34 15 19 45 31.6 50 93 65 -28 40 46 -28 27 44 -28 47 4 -28 21 26 0.24 -103 0 0 -28 52 29 19 45 34.4 51 92 64 -28 58 59 -28 45 58 -29 5 17 -28 39 41 0.24 -102 0 0 -29 10 23 19 45 37.2 51 91 64 -29 16 52 -29 3 53 -29 23 9 -28 57 37 0.24 -101 0 0 -29 27 57 19 45 40.0 52 90 63 -29 34 26 -29 21 28 -29 40 43 -29 15 13 0.24 -100 0 0 -29 45 12 19 45 42.8 53 89 62 -29 51 40 -29 38 44 -29 57 56 -29 32 28 0.24 - 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1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.014", 0.004", 96.642° remarks: * orbital elements for (2342)Lebedev : Mean anomaly = 234.9754131785 deg Arg. of pericenter = 216.9385651422 deg Long. of node = 195.8930224669 deg Inclination = 0.3697201403 deg Eccentricity = 0.1372882273 Semimajor axis = 3.2194440560 AU Perihelion dist = 2.7774522885 AU Mag: H = 12.07, G = 0.15 Epoch of elements : MJD 60598.82477716 TDT (2024 Oct 15.8248) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,0.74,2024,10,15,19.794655,-0.012276,-0.230911,16.826218,-1.029355,0.005052,-0.000274,-0.000001,0.000000 -60.0624,-22.8939,-120.52,-8.92,False HIP 85254,17.42118728,-22.8710879,9.50,9.24,9.10,0.1,0,,17.44592003,-22.8938646,9.32,9.01,0,0,0 2342,Lebedev,18.56,22.092,3.9102,0,0,2.738,-2.31,,2.2,0 0,234.8347,2024,10,15,216.9386,195.8930,0.3697,0.13729,3.21944,2.77745,12.07,5.0,0.15 1.483,0.0143,0.0037,97,0.0038,Known errors,1.14,0,-1,-1 20241015__85254,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org