IOTA/IOTA-ES occultation update for (1815) Beethoven / UCAC4 336-187989 event on 2024 Oct 19, 00:40 UT Visible from Summary ------- On 2024 Oct 19 UT, the 30.7008783418854 km diameter asteroid (1815) Beethoven will occult a 11.9 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 6.01 mag to 17.90 mag (the magnitude of the asteroid) for at most 1.710 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 Oct 19, 00:34 - 2024 Oct 19, 00:45 * geocentric midpoint of event [JD]: 2460602.52789900 * magnitude of target star: 11.89 * magnitude drop [mag]: 6.01 * estimated maximum duration [s]: 1.710 * Moon: 96 % sunlit, 121° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.002", 86°) * approx speed of asteroid's shadow [km/s]: 18.1374 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 336-187989 by 1815 Beethoven on 2024 Oct 19 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 149 0 0 -30 43 33 0 34 57.2 1 116 63 -30 54 8 -30 32 59 -30 58 11 -30 28 57 .... 150 0 0 -31 9 34 0 34 57.4 2 116 63 -31 20 10 -30 59 0 -31 24 12 -30 54 59 0.47 151 0 0 -31 35 28 0 34 57.6 3 115 64 -31 46 3 -31 24 54 -31 50 5 -31 20 52 0.49 152 0 0 -32 1 12 0 34 58.0 4 115 64 -32 11 47 -31 50 38 -32 15 49 -31 46 37 0.50 153 0 0 -32 26 46 0 34 58.5 5 114 64 -32 37 21 -32 16 13 -32 41 23 -32 12 12 0.50 154 0 0 -32 52 11 0 34 59.1 6 114 64 -33 2 45 -32 41 38 -33 6 47 -32 37 37 0.50 155 0 0 -33 17 24 0 34 59.8 7 113 64 -33 27 58 -33 6 51 -33 32 0 -33 2 50 0.51 156 0 0 -33 42 26 0 35 0.6 7 112 64 -33 52 59 -33 31 54 -33 57 1 -33 27 53 0.51 157 0 0 -34 7 16 0 35 1.4 8 112 64 -34 17 49 -33 56 44 -34 21 50 -33 52 43 0.51 158 0 0 -34 31 53 0 35 2.4 9 111 64 -34 42 26 -34 21 22 -34 46 27 -34 17 22 0.51 159 0 0 -34 56 17 0 35 3.5 10 111 64 -35 6 49 -34 45 47 -35 10 50 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17 0 0 -21 16 37 0 45 22.6 5 248 -59 -21 27 5 -21 6 10 -21 31 5 -21 2 12 0.60 - 16 0 0 -20 50 11 0 45 23.1 4 247 -59 -21 0 38 -20 39 45 -21 4 37 -20 35 47 0.62 - 15 0 0 -20 23 53 0 45 23.6 3 247 -60 -20 34 19 -20 13 28 -20 38 18 -20 9 30 0.66 - 14 0 0 -19 57 44 0 45 23.9 2 246 -60 -20 8 9 -19 47 20 -20 12 8 -19 43 23 0.72 - 13 0 0 -19 31 45 0 45 24.1 1 246 -60 -19 42 9 -19 21 22 -19 46 8 -19 17 25 0.92 - 12 0 0 -19 5 57 0 45 24.2 0 246 -61 -19 16 20 .. .. .. -19 20 18 .. .. .. 11.32 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 336-187989 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 14 45.0884 DE: -22 53 01.203 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 14 45.0884 DE: -22 53 01.204 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.9 * B mag [mag]: 12.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1815) Beethoven asteroid class: approx. diameter [km]: 31 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.75200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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", 0.002", 85.97° remarks: * orbital elements for (1815)Beethoven : Mean anomaly = 199.2604383598 deg Arg. of pericenter = 358.3423091263 deg Long. of node = 110.7927150658 deg Inclination = 2.7412780332 deg Eccentricity = 0.1928597340 Semimajor axis = 3.1513116401 AU Perihelion dist = 2.5435505155 AU Mag: H = 11.32, G = 0.15 Epoch of elements : MJD 60602.02789904 TDT (2024 Oct 19.0279) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,1.71,2024,10,19,0.669576,0.048422,-0.448909,10.177303,1.106132,0.005810,0.000750,0.000000,0.000000 -108.9729,-22.8418,166.20,-10.09,False UCAC4 336-187989,19.24585792,-22.8836676,12.84,11.89,11.38,0.1,0,,19.27060815,-22.8417638,6.01,6.07,0,0,0 1815,Beethoven,17.90,30.973,3.7520,0,0,1.726,2.60,,2.0,0 0,199.0793,2024,10,18,358.3423,110.7927,2.7413,0.19286,3.15131,2.54355,11.32,5.0,0.15 1.190,0.0117,0.0021,86,0.0022,Known errors,1.11,0,-1,-1 20241019_187989,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org