IOTA/IOTA-ES occultation update for (4821) Bianucci / TYC 838-00392-1 event on 2024 Oct 18, 08:40 UT Visible from Summary ------- On 2024 Oct 18 UT, the 15.077 km diameter asteroid (4821) Bianucci will occult a 11.3 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.14 mag to 18.48 mag (the magnitude of the asteroid) for at most 0.410 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: 98 * date and approx. time of event: 2024 Oct 18, 08:38 - 2024 Oct 18, 08:43 * geocentric midpoint of event [JD]: 2460601.86161700 * magnitude of target star: 11.34 * magnitude drop [mag]: 7.14 * estimated maximum duration [s]: 0.410 * Moon: 99 % sunlit, 117° distance * Sun: 51° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.002", 109°) * approx speed of asteroid's shadow [km/s]: 36.8122 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 838-00392-1 by 4821 Bianucci on 2024 Oct 18 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 - 88 0 0 -10 18 35 8 38 15.8 1 80 -41 -10 23 27 -10 13 44 -10 26 55 -10 10 17 .... - 87 0 0 -10 8 59 8 38 15.9 2 80 -40 -10 13 50 -10 4 8 -10 17 17 -10 0 41 0.41 - 86 0 0 - 9 59 50 8 38 16.1 3 80 -39 -10 4 40 - 9 54 59 -10 8 8 - 9 51 32 0.48 - 85 0 0 - 9 51 8 8 38 16.3 4 80 -38 - 9 55 58 - 9 46 17 - 9 59 25 - 9 42 51 0.52 - 84 0 0 - 9 42 53 8 38 16.6 5 79 -37 - 9 47 44 - 9 38 4 - 9 51 11 - 9 34 37 0.54 - 83 0 0 - 9 35 7 8 38 16.9 6 79 -36 - 9 39 57 - 9 30 17 - 9 43 23 - 9 26 51 0.55 - 82 0 0 - 9 27 48 8 38 17.3 7 79 -35 - 9 32 38 - 9 22 59 - 9 36 4 - 9 19 33 0.56 - 81 0 0 - 9 20 57 8 38 17.7 8 79 -35 - 9 25 47 - 9 16 8 - 9 29 13 - 9 12 42 0.57 - 80 0 0 - 9 14 35 8 38 18.2 9 79 -34 - 9 19 24 - 9 9 46 - 9 22 50 - 9 6 20 0.57 - 79 0 0 - 9 8 40 8 38 18.8 10 78 -33 - 9 13 29 - 9 3 51 - 9 16 55 - 9 0 26 0.57 - 78 0 0 - 9 3 13 8 38 19.4 11 78 -32 - 9 8 2 - 8 58 25 - 9 11 28 - 8 54 59 0.58 - 77 0 0 - 8 58 15 8 38 20.1 12 78 -31 - 9 3 4 - 8 53 27 - 9 6 29 - 8 50 1 0.58 - 76 0 0 - 8 53 46 8 38 20.9 13 78 -30 - 8 58 34 - 8 48 57 - 9 2 0 - 8 45 32 0.58 - 75 0 0 - 8 49 44 8 38 21.7 14 78 -29 - 8 54 33 - 8 44 56 - 8 57 58 - 8 41 31 0.59 - 74 0 0 - 8 46 12 8 38 22.6 15 78 -28 - 8 51 0 - 8 41 24 - 8 54 25 - 8 37 59 0.59 - 73 0 0 - 8 43 7 8 38 23.5 16 77 -27 - 8 47 55 - 8 38 19 - 8 51 21 - 8 34 55 0.59 - 72 0 0 - 8 40 32 8 38 24.5 17 77 -26 - 8 45 20 - 8 35 44 - 8 48 45 - 8 32 19 0.59 - 71 0 0 - 8 38 25 8 38 25.5 18 77 -25 - 8 43 13 - 8 33 37 - 8 46 38 - 8 30 12 0.59 - 70 0 0 - 8 36 47 8 38 26.6 19 77 -24 - 8 41 35 - 8 31 59 - 8 45 0 - 8 28 34 0.59 - 69 0 0 - 8 35 37 8 38 27.8 20 77 -23 - 8 40 25 - 8 30 50 - 8 43 50 - 8 27 25 0.60 - 68 0 0 - 8 34 57 8 38 29.0 21 76 -22 - 8 39 45 - 8 30 9 - 8 43 10 - 8 26 45 0.60 - 67 0 0 - 8 34 45 8 38 30.3 22 76 -21 - 8 39 33 - 8 29 58 - 8 42 58 - 8 26 33 0.60 - 66 0 0 - 8 35 2 8 38 31.6 23 76 -20 - 8 39 50 - 8 30 15 - 8 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43 0.61 - 53 0 0 - 9 22 30 8 38 53.6 35 71 -8 - 9 27 20 - 9 17 40 - 9 30 46 - 9 14 14 0.61 - 52 0 0 - 9 29 30 8 38 55.7 36 71 -7 - 9 34 20 - 9 24 40 - 9 37 47 - 9 21 14 0.61 - 51 0 0 - 9 36 59 8 38 57.7 37 70 -6 - 9 41 49 - 9 32 9 - 9 45 16 - 9 28 42 0.61 - 50 0 0 - 9 44 56 8 38 59.9 37 70 -5 - 9 49 47 - 9 40 5 - 9 53 14 - 9 36 39 0.61 - 49 0 0 - 9 53 21 8 39 2.1 38 69 -4 - 9 58 12 - 9 48 30 -10 1 40 - 9 45 3 0.61 - 48 0 0 -10 2 15 8 39 4.3 39 69 -3 -10 7 6 - 9 57 24 -10 10 34 - 9 53 56 0.61 - 47 0 0 -10 11 36 8 39 6.6 40 68 -2 -10 16 28 -10 6 45 -10 19 56 -10 3 17 0.61 - 46 0 0 -10 21 26 8 39 8.9 41 68 -1 -10 26 18 -10 16 34 -10 29 47 -10 13 6 0.61 - 45 0 0 -10 31 44 8 39 11.3 42 67 0 -10 36 36 -10 26 51 -10 40 5 -10 23 23 0.61 - 44 0 0 -10 42 29 8 39 13.7 43 66 1 -10 47 22 -10 37 36 -10 50 51 -10 34 8 0.61 - 43 0 0 -10 53 42 8 39 16.1 43 65 2 -10 58 36 -10 48 49 -11 2 5 -10 45 20 0.61 - 42 0 0 -11 5 23 8 39 18.6 44 65 3 -11 10 17 -11 0 29 -11 13 46 -10 57 0 0.61 - 41 0 0 -11 17 31 8 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22 10 -34 11 24 -34 26 1 -34 7 34 0.61 22 0 0 -34 42 32 8 42 19.5 40 329 57 -34 47 55 -34 37 9 -34 51 46 -34 33 19 0.61 23 0 0 -35 8 9 8 42 21.6 40 328 57 -35 13 32 -35 2 46 -35 17 22 -34 58 56 0.61 24 0 0 -35 33 36 8 42 23.7 39 327 58 -35 38 59 -35 28 14 -35 42 50 -35 24 24 0.61 25 0 0 -35 58 54 8 42 25.7 38 326 58 -36 4 17 -35 53 32 -36 8 8 -35 49 42 0.61 26 0 0 -36 24 2 8 42 27.7 37 325 58 -36 29 25 -36 18 40 -36 33 15 -36 14 50 0.61 27 0 0 -36 48 59 8 42 29.6 36 324 58 -36 54 22 -36 43 37 -36 58 12 -36 39 48 0.61 28 0 0 -37 13 45 8 42 31.5 36 323 58 -37 19 8 -37 8 23 -37 22 57 -37 4 34 0.61 29 0 0 -37 38 19 8 42 33.3 35 322 58 -37 43 41 -37 32 57 -37 47 31 -37 29 8 0.61 30 0 0 -38 2 40 8 42 35.1 34 321 59 -38 8 2 -37 57 18 -38 11 52 -37 53 29 0.61 31 0 0 -38 26 49 8 42 36.8 33 320 59 -38 32 10 -38 21 27 -38 36 0 -38 17 38 0.61 32 0 0 -38 50 44 8 42 38.5 32 319 59 -38 56 5 -38 45 22 -38 59 54 -38 41 34 0.61 33 0 0 -39 14 25 8 42 40.2 32 319 59 -39 19 46 -39 9 4 -39 23 35 -39 5 15 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-47 51 3 8 43 7.0 11 298 50 -47 56 11 -47 45 56 -47 59 50 -47 42 17 0.62 60 0 0 -48 6 42 8 43 7.5 11 298 50 -48 11 49 -48 1 35 -48 15 28 -47 57 57 0.62 61 0 0 -48 22 2 8 43 8.0 10 297 49 -48 27 8 -48 16 56 -48 30 46 -48 13 18 0.62 62 0 0 -48 37 2 8 43 8.4 9 296 49 -48 42 7 -48 31 56 -48 45 45 -48 28 19 0.62 63 0 0 -48 51 42 8 43 8.8 9 295 48 -48 56 47 -48 46 37 -49 0 24 -48 43 0 0.62 64 0 0 -49 6 3 8 43 9.2 8 295 48 -49 11 7 -49 0 59 -49 14 44 -48 57 22 0.62 65 0 0 -49 20 4 8 43 9.5 7 294 47 -49 25 8 -49 15 1 -49 28 45 -49 11 25 0.62 66 0 0 -49 33 46 8 43 9.8 7 293 47 -49 38 50 -49 28 44 -49 42 26 -49 25 8 0.62 67 0 0 -49 47 9 8 43 10.0 6 292 46 -49 52 12 -49 42 7 -49 55 47 -49 38 32 0.62 68 0 0 -50 0 12 8 43 10.3 5 292 46 -50 5 14 -49 55 11 -50 8 50 -49 51 36 0.63 69 0 0 -50 12 57 8 43 10.5 5 291 45 -50 17 58 -50 7 56 -50 21 33 -50 4 21 0.63 70 0 0 -50 25 22 8 43 10.6 4 290 45 -50 30 22 -50 20 21 -50 33 57 -50 16 47 0.63 71 0 0 -50 37 27 8 43 10.8 3 289 44 -50 42 27 -50 32 27 -50 46 1 -50 28 54 0.64 72 0 0 -50 49 14 8 43 10.9 3 288 44 -50 54 14 -50 44 15 -50 57 47 -50 40 42 0.65 73 0 0 -51 0 42 8 43 11.0 2 288 43 -51 5 41 -50 55 43 -51 9 14 -50 52 11 0.66 74 0 0 -51 11 51 8 43 11.1 1 287 43 -51 16 49 -51 6 52 -51 20 22 -51 3 20 0.69 75 0 0 -51 22 41 8 43 11.1 1 286 42 -51 27 38 -51 17 43 -51 31 11 -51 14 11 0.79 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 838-00392-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 23 33.0186 DE: +09 44 30.097 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 23 33.0187 DE: +09 44 30.097 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4821) Bianucci asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.20420 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#45 date of fit: 2023 Feb 10 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): 0.018", 0.002", 109.277° remarks: * orbital elements for (4821)Bianucci : Mean anomaly = 11.6243364356 deg Arg. of pericenter = 327.7377668916 deg Long. of node = 153.8272777296 deg Inclination = 1.1883597114 deg Eccentricity = 0.1489466157 Semimajor axis = 3.1468375192 AU Perihelion dist = 2.6781267205 AU Mag: H = 12.91, G = 0.15 Epoch of elements : MJD 60601.36161692 TDT (2024 Oct 18.3616) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#452023Feb10,0.41,2024,10,18,8.678808,-0.185481,-0.487192,19.413143,-7.405903,-0.004147,0.001600,-0.000001,0.000000 -1.3027,9.6182,46.09,-9.85,False TYC 838-00392-1,10.39250514,9.7416939,11.75,11.34,11.12,0.0,0,,10.41407588,9.6182039,7.14,6.91,0,0,0 4821,Bianucci,18.48,15.077,3.2042,0,0,3.603,-20.33,,1.4,0 0,11.5605,2024,10,18,327.7378,153.8273,1.1884,0.14895,3.14684,2.67813,12.91,5.0,0.15 1.356,0.0177,0.0023,109,0.0023,Known errors,0.82,0,-1,-1 20241018_0392-1,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org