IOTA/IOTA-ES occultation update for (1782) Schneller / UCAC4 359-199336 event on 2024 Oct 10, 21:33 UT Visible from Summary ------- On 2024 Oct 10 UT, the 22.541 km diameter asteroid (1782) Schneller will occult a 12.0 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.02 mag to 17.00 mag (the magnitude of the asteroid) for at most 2.560 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: 96 * date and approx. time of event: 2024 Oct 10, 21:21 - 2024 Oct 10, 21:44 * geocentric midpoint of event [JD]: 2460594.39793425 * magnitude of target star: 11.99 * magnitude drop [mag]: 5.02 * estimated maximum duration [s]: 2.560 * Moon: 50 % sunlit, 19° distance * Sun: 109° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 4.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.005", 78°) * approx speed of asteroid's shadow [km/s]: 8.8067 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 359-199336 by 1782 Schneller on 2024 Oct 10 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 -129 0 0 -23 55 37 21 21 20.5 0 110 68 -24 2 22 -23 48 53 -24 7 50 -23 43 25 .... -128 0 0 -24 15 28 21 21 20.6 1 109 67 -24 22 12 -24 8 44 -24 27 40 -24 3 17 0.27 -127 0 0 -24 35 7 21 21 21.0 2 109 66 -24 41 50 -24 28 23 -24 47 18 -24 22 56 0.27 -126 0 0 -24 54 32 21 21 21.6 3 109 65 -25 1 15 -24 47 49 -25 6 43 -24 42 22 0.27 -125 0 0 -25 13 45 21 21 22.4 4 108 65 -25 20 28 -25 7 2 -25 25 55 -25 1 36 0.27 -124 0 0 -25 32 44 21 21 23.4 5 108 64 -25 39 26 -25 26 2 -25 44 53 -25 20 36 0.27 -123 0 0 -25 51 30 21 21 24.7 6 107 63 -25 58 12 -25 44 48 -26 3 38 -25 39 22 0.27 -122 0 0 -26 10 1 21 21 26.1 7 107 62 -26 16 43 -26 3 20 -26 22 8 -25 57 54 0.27 -121 0 0 -26 28 18 21 21 27.7 8 106 61 -26 34 59 -26 21 37 -26 40 25 -26 16 12 0.27 -120 0 0 -26 46 20 21 21 29.5 9 106 60 -26 53 1 -26 39 40 -26 58 26 -26 34 16 0.27 -119 0 0 -27 4 8 21 21 31.6 10 105 59 -27 10 48 -26 57 28 -27 16 13 -26 52 4 0.27 -118 0 0 -27 21 40 21 21 33.8 11 105 58 -27 28 19 -27 15 1 -27 33 44 -27 9 37 0.27 -117 0 0 -27 38 57 21 21 36.2 12 105 57 -27 45 36 -27 32 18 -27 50 59 -27 26 54 0.27 -116 0 0 -27 55 57 21 21 38.8 13 104 57 -28 2 36 -27 49 19 -28 7 59 -27 43 56 0.27 -115 0 0 -28 12 42 21 21 41.6 14 104 56 -28 19 20 -28 6 4 -28 24 43 -28 0 42 0.27 -114 0 0 -28 29 10 21 21 44.5 15 103 55 -28 35 48 -28 22 33 -28 41 10 -28 17 11 0.27 -113 0 0 -28 45 22 21 21 47.7 15 103 54 -28 51 59 -28 38 46 -28 57 21 -28 33 24 0.27 -112 0 0 -29 1 17 21 21 51.0 16 102 53 -29 7 54 -28 54 41 -29 13 15 -28 49 20 0.27 -111 0 0 -29 16 55 21 21 54.5 17 102 52 -29 23 31 -29 10 20 -29 28 53 -29 4 59 0.27 -110 0 0 -29 32 16 21 21 58.2 18 101 51 -29 38 52 -29 25 41 -29 44 13 -29 20 21 0.27 -109 0 0 -29 47 20 21 22 2.0 19 100 50 -29 53 55 -29 40 45 -29 59 15 -29 35 26 0.27 -108 0 0 -30 2 6 21 22 6.0 20 100 49 -30 8 40 -29 55 32 -30 14 0 -29 50 13 0.27 -107 0 0 -30 16 34 21 22 10.2 21 99 48 -30 23 8 -30 10 1 -30 28 27 -30 4 42 0.27 -106 0 0 -30 30 45 21 22 14.6 22 99 48 -30 37 18 -30 24 12 -30 42 37 -30 18 53 0.27 -105 0 0 -30 44 37 21 22 19.1 23 98 47 -30 51 9 -30 38 5 -30 56 28 -30 32 46 0.27 -104 0 0 -30 58 11 21 22 23.7 24 98 46 -31 4 43 -30 51 39 -31 10 1 -30 46 22 0.27 -103 0 0 -31 11 27 21 22 28.6 25 97 45 -31 17 58 -31 4 55 -31 23 16 -30 59 38 0.27 -102 0 0 -31 24 24 21 22 33.5 25 97 44 -31 30 55 -31 17 53 -31 36 12 -31 12 36 0.27 -101 0 0 -31 37 3 21 22 38.7 26 96 43 -31 43 33 -31 30 32 -31 48 50 -31 25 16 0.27 -100 0 0 -31 49 22 21 22 43.9 27 95 42 -31 55 52 -31 42 53 -32 1 9 -31 37 37 0.27 - 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9 57 32 -10 16 40 - 9 52 0 0.29 38 0 0 - 9 41 15 21 44 8.0 17 254 -72 - 9 48 3 - 9 34 27 - 9 53 35 - 9 28 56 0.29 39 0 0 - 9 18 18 21 44 12.0 16 254 -72 - 9 25 6 - 9 11 30 - 9 30 37 - 9 5 59 0.29 40 0 0 - 8 55 28 21 44 15.9 15 253 -71 - 9 2 16 - 8 48 41 - 9 7 47 - 8 43 11 0.29 41 0 0 - 8 32 48 21 44 19.4 14 253 -71 - 8 39 35 - 8 26 1 - 8 45 6 - 8 20 31 0.30 42 0 0 - 8 10 17 21 44 22.7 13 253 -71 - 8 17 3 - 8 3 30 - 8 22 34 - 7 58 0 0.30 43 0 0 - 7 47 55 21 44 25.8 12 253 -71 - 7 54 42 - 7 41 9 - 8 0 12 - 7 35 40 0.30 44 0 0 - 7 25 44 21 44 28.6 11 253 -70 - 7 32 30 - 7 18 58 - 7 38 0 - 7 13 29 0.30 45 0 0 - 7 3 44 21 44 31.1 10 253 -70 - 7 10 29 - 6 56 58 - 7 15 58 - 6 51 30 0.30 46 0 0 - 6 41 55 21 44 33.4 9 253 -69 - 6 48 40 - 6 35 10 - 6 54 9 - 6 29 42 0.31 47 0 0 - 6 20 17 21 44 35.4 8 252 -69 - 6 27 2 - 6 13 33 - 6 32 30 - 6 8 5 0.31 48 0 0 - 5 58 52 21 44 37.2 7 252 -68 - 6 5 36 - 5 52 8 - 6 11 4 - 5 46 41 0.32 49 0 0 - 5 37 40 21 44 38.7 6 252 -68 - 5 44 23 - 5 30 56 - 5 49 51 - 5 25 29 0.32 50 0 0 - 5 16 40 21 44 40.0 5 252 -67 - 5 23 23 - 5 9 57 - 5 28 51 - 5 4 31 0.33 51 0 0 - 4 55 54 21 44 41.0 4 252 -66 - 5 2 37 - 4 49 12 - 5 8 4 - 4 43 46 0.35 52 0 0 - 4 35 22 21 44 41.7 3 252 -66 - 4 42 5 - 4 28 41 - 4 47 31 - 4 23 15 0.38 53 0 0 - 4 15 5 21 44 42.2 1 252 -65 - 4 21 46 - 4 8 24 - 4 27 12 - 4 2 58 0.45 54 0 0 - 3 55 2 21 44 42.4 0 252 -64 - 4 1 43 - 3 48 21 - 4 7 8 - 3 42 56 0.88 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 359-199336 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 35 57.1464 DE: -18 14 45.623 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 35 57.1463 DE: -18 14 45.623 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1782) Schneller asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.013 distance from Earth [AU]: 2.35740 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.023", 0.005", 78.176° remarks: * orbital elements for (1782)Schneller : Mean anomaly = 47.5729655588 deg Arg. of pericenter = 106.5724951576 deg Long. of node = 157.3677607480 deg Inclination = 1.5451952591 deg Eccentricity = 0.1520107435 Semimajor axis = 3.1172037686 AU Perihelion dist = 2.6433553061 AU Mag: H = 11.90, G = 0.15 Epoch of elements : MJD 60593.89793388 TDT (2024 Oct 10.8979) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,2.56,2024,10,10,21.550422,0.045892,-0.245926,4.886950,0.908891,0.005304,0.001373,0.000000,0.000000 -33.8892,-18.1606,-146.56,-7.09,False UCAC4 359-199336,20.59920736,-18.2460063,12.39,11.99,11.77,0.0,0,,20.62282135,-18.1606265,5.02,4.79,0,0,0 1782,Schneller,17.00,22.541,2.3574,0,0,1.280,3.39,,1.8,0 0,47.4122,2024,10,10,106.5725,157.3678,1.5452,0.15201,3.11720,2.64336,11.89,5.0,0.15 1.406,0.0230,0.0053,78,0.0054,Known errors,0.81,0,-1,-1 20241010_199336,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org