IOTA/IOTA-ES occultation update for (3439) Lebofsky / TYC 5251-00956-1 event on 2024 Dec 30, 05:22 UT Visible from Summary ------- On 2024 Dec 30 UT, the 8.896 km diameter asteroid (3439) Lebofsky will occult a 10.4 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.37 mag to 17.80 mag (the magnitude of the asteroid) for at most 0.340 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: 2024 Dec 30, 05:18 - 2024 Dec 30, 05:26 * geocentric midpoint of event [JD]: 2460674.72411917 * magnitude of target star: 10.43 * magnitude drop [mag]: 7.37 * estimated maximum duration [s]: 0.340 * Moon: 1 % sunlit, 82° distance * Sun: 75° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 9 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.001", 62°) * approx speed of asteroid's shadow [km/s]: 26.1909 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5251-00956-1 by 3439 Lebofsky on 2024 Dec 30 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 85 0 0 - 8 57 3 5 18 51.3 0 92 69 - 8 59 35 - 8 54 32 - 9 0 47 - 8 53 19 .... 86 0 0 - 8 58 52 5 18 51.3 1 92 70 - 9 1 23 - 8 56 20 - 9 2 36 - 8 55 8 -0.18 87 0 0 - 9 0 11 5 18 51.5 2 92 71 - 9 2 43 - 8 57 40 - 9 3 55 - 8 56 27 -0.24 88 0 0 - 9 1 2 5 18 51.7 3 92 71 - 9 3 34 - 8 58 31 - 9 4 46 - 8 57 18 -0.26 89 0 0 - 9 1 24 5 18 52.0 4 91 72 - 9 3 55 - 8 58 52 - 9 5 8 - 8 57 40 -0.27 90 0 0 - 9 1 16 5 18 52.3 5 91 72 - 9 3 48 - 8 58 45 - 9 5 0 - 8 57 32 -0.28 91 0 0 - 9 0 40 5 18 52.8 6 91 73 - 9 3 12 - 8 58 9 - 9 4 24 - 8 56 56 -0.29 92 0 0 - 8 59 35 5 18 53.3 7 91 73 - 9 2 6 - 8 57 3 - 9 3 19 - 8 55 51 -0.29 93 0 0 - 8 58 0 5 18 53.9 8 91 74 - 9 0 32 - 8 55 29 - 9 1 45 - 8 54 16 -0.29 94 0 0 - 8 55 57 5 18 54.5 9 91 74 - 8 58 29 - 8 53 25 - 8 59 41 - 8 52 13 -0.30 95 0 0 - 8 53 24 5 18 55.3 10 91 75 - 8 55 56 - 8 50 52 - 8 57 9 - 8 49 40 -0.30 96 0 0 - 8 50 22 5 18 56.1 11 90 75 - 8 52 54 - 8 47 51 - 8 54 7 - 8 46 38 -0.30 97 0 0 - 8 46 51 5 18 57.0 12 90 75 - 8 49 23 - 8 44 20 - 8 50 36 - 8 43 7 -0.30 98 0 0 - 8 42 51 5 18 58.0 13 90 75 - 8 45 23 - 8 40 19 - 8 46 36 - 8 39 7 -0.30 99 0 0 - 8 38 22 5 18 59.0 14 90 75 - 8 40 54 - 8 35 50 - 8 42 7 - 8 34 37 -0.30 100 0 0 - 8 33 24 5 19 0.1 15 90 75 - 8 35 56 - 8 30 51 - 8 37 8 - 8 29 38 -0.30 101 0 0 - 8 27 56 5 19 1.3 16 90 75 - 8 30 28 - 8 25 23 - 8 31 41 - 8 24 11 -0.31 102 0 0 - 8 21 59 5 19 2.6 17 90 75 - 8 24 31 - 8 19 26 - 8 25 44 - 8 18 13 -0.31 103 0 0 - 8 15 33 5 19 3.9 18 90 75 - 8 18 5 - 8 13 0 - 8 19 18 - 8 11 47 -0.31 104 0 0 - 8 8 37 5 19 5.4 19 89 75 - 8 11 10 - 8 6 4 - 8 12 23 - 8 4 51 -0.31 105 0 0 - 8 1 12 5 19 6.9 20 89 74 - 8 3 45 - 7 58 39 - 8 4 58 - 7 57 26 -0.31 106 0 0 - 7 53 18 5 19 8.4 21 89 74 - 7 55 51 - 7 50 45 - 7 57 5 - 7 49 32 -0.31 107 0 0 - 7 44 55 5 19 10.1 22 89 73 - 7 47 29 - 7 42 22 - 7 48 42 - 7 41 9 -0.31 108 0 0 - 7 36 3 5 19 11.8 23 89 73 - 7 38 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38 4 45 5 26 5.0 28 242 -41 38 2 5 38 7 24 38 0 49 38 8 41 -0.31 -135 0 0 38 20 37 5 26 6.7 28 242 -42 38 17 58 38 23 16 38 16 42 38 24 32 -0.31 -134 0 0 38 36 6 5 26 8.4 27 243 -43 38 33 27 38 38 45 38 32 11 38 40 1 -0.31 -133 0 0 38 51 11 5 26 10.1 26 244 -43 38 48 32 38 53 49 38 47 17 38 55 5 -0.31 -132 0 0 39 5 52 5 26 11.6 25 245 -44 39 3 14 39 8 30 39 1 59 39 9 46 -0.31 -131 0 0 39 20 10 5 26 13.1 24 245 -45 39 17 32 39 22 48 39 16 17 39 24 3 -0.31 -130 0 0 39 34 5 5 26 14.6 24 246 -46 39 31 27 39 36 42 39 30 12 39 37 57 -0.31 -129 0 0 39 47 35 5 26 16.0 23 247 -46 39 44 58 39 50 13 39 43 43 39 51 28 -0.31 -128 0 0 40 0 43 5 26 17.4 22 247 -47 39 58 6 40 3 20 39 56 51 40 4 35 -0.31 -127 0 0 40 13 27 5 26 18.7 21 248 -48 40 10 51 40 16 4 40 9 36 40 17 19 -0.31 -126 0 0 40 25 48 5 26 19.9 20 249 -48 40 23 12 40 28 25 40 21 57 40 29 39 -0.31 -125 0 0 40 37 46 5 26 21.1 20 249 -49 40 35 10 40 40 22 40 33 56 40 41 37 -0.31 -124 0 0 40 49 21 5 26 22.3 19 250 -50 40 46 45 40 51 57 40 45 31 40 53 11 -0.31 -123 0 0 41 0 33 5 26 23.4 18 251 -51 40 57 57 41 3 8 40 56 43 41 4 23 -0.31 -122 0 0 41 11 22 5 26 24.4 17 251 -51 41 8 47 41 13 57 41 7 33 41 15 11 -0.31 -121 0 0 41 21 48 5 26 25.4 16 252 -52 41 19 13 41 24 23 41 17 59 41 25 37 -0.31 -120 0 0 41 31 51 5 26 26.4 16 253 -53 41 29 17 41 34 26 41 28 3 41 35 40 -0.31 -119 0 0 41 41 32 5 26 27.3 15 253 -53 41 38 58 41 44 6 41 37 44 41 45 20 -0.31 -118 0 0 41 50 50 5 26 28.1 14 254 -54 41 48 16 41 53 24 41 47 3 41 54 38 -0.31 -117 0 0 41 59 46 5 26 28.9 13 255 -55 41 57 12 42 2 20 41 55 59 42 3 34 -0.31 -116 0 0 42 8 19 5 26 29.7 13 255 -55 42 5 46 42 10 53 42 4 32 42 12 7 -0.31 -115 0 0 42 16 30 5 26 30.4 12 256 -56 42 13 57 42 19 4 42 12 44 42 20 17 -0.31 -114 0 0 42 24 19 5 26 31.1 11 257 -56 42 21 46 42 26 53 42 20 33 42 28 6 -0.31 -113 0 0 42 31 46 5 26 31.7 10 257 -57 42 29 13 42 34 19 42 28 0 42 35 32 -0.32 -112 0 0 42 38 51 5 26 32.3 10 258 -58 42 36 18 42 41 23 42 35 5 42 42 37 -0.32 -111 0 0 42 45 33 5 26 32.8 9 259 -58 42 43 1 42 48 6 42 41 48 42 49 19 -0.32 -110 0 0 42 51 54 5 26 33.3 8 260 -59 42 49 22 42 54 27 42 48 9 42 55 39 -0.32 -109 0 0 42 57 53 5 26 33.8 7 260 -59 42 55 21 43 0 25 42 54 8 43 1 38 -0.32 -108 0 0 43 3 30 5 26 34.2 7 261 -60 43 0 58 43 6 2 42 59 45 43 7 15 -0.32 -107 0 0 43 8 46 5 26 34.5 6 262 -61 43 6 14 43 11 18 43 5 1 43 12 30 -0.32 -106 0 0 43 13 40 5 26 34.8 5 262 -61 43 11 8 43 16 11 43 9 55 43 17 24 -0.32 -105 0 0 43 18 12 5 26 35.1 4 263 -62 43 15 40 43 20 44 43 14 28 43 21 56 -0.33 -104 0 0 43 22 23 5 26 35.4 4 264 -62 43 19 51 43 24 54 43 18 38 43 26 7 -0.33 -103 0 0 43 26 12 5 26 35.5 3 264 -63 43 23 40 43 28 44 43 22 28 43 29 56 -0.34 -102 0 0 43 29 40 5 26 35.7 2 265 -63 43 27 9 43 32 12 43 25 56 43 33 24 -0.35 -101 0 0 43 32 47 5 26 35.8 2 266 -64 43 30 15 43 35 18 43 29 3 43 36 30 -0.37 -100 0 0 43 35 32 5 26 35.9 1 266 -64 43 33 1 43 38 3 43 31 48 43 39 16 -0.42 - 99 0 0 43 37 56 5 26 35.9 0 267 -65 43 35 25 43 40 27 43 34 13 43 41 40 -1.32 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 5251-00956-1 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 34 18.7394 DE: -02 12 44.266 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 34 18.7392 DE: -02 12 44.268 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * B mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3439) Lebofsky asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.004 distance from Earth [AU]: 2.73170 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2023 Apr 24 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): 0.012", 0.001", 61.584° remarks: * orbital elements for (3439)Lebofsky : Mean anomaly = 67.5205424460 deg Arg. of pericenter = 283.6029186916 deg Long. of node = 7.7590590367 deg Inclination = 4.7313107708 deg Eccentricity = 0.1372996644 Semimajor axis = 2.7424038427 AU Perihelion dist = 2.3658727154 AU Mag: H = 12.47, G = 0.15 Epoch of elements : MJD 60674.22411921 TDT (2024 Dec 30.2241) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr24,0.34,2024,12,30,5.378860,-0.130564,0.266834,13.267380,6.519935,0.005256,0.002282,0.000000,0.000000 174.0655,-2.0748,99.97,-23.13,False TYC 5251-00956-1,23.57187209,-2.2122960,10.82,10.43,10.22,0.0,0,,23.59316817,-2.0748043,7.37,7.13,0,0,0 3439,Lebofsky,17.80,8.896,2.7317,0,0,2.850,20.99,,0.8,0 0,67.4719,2024,12,30,283.6029,7.7591,4.7313,0.13730,2.74240,2.36587,12.47,5.0,0.15 1.239,0.0123,0.0010,62,0.0011,Known errors,0.94,0,-1,-1 20241230_0956-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org