IOTA/IOTA-ES occultation update for (1381) Danubia / UCAC4 328-202226 event on 2024 Jul 02, 10:56 UT Visible from Summary ------- On 2024 Jul 02 UT, the 20.94 km diameter asteroid (1381) Danubia will occult a 11.8 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 3.96 mag to 15.71 mag (the magnitude of the asteroid) for at most 3.320 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 Jul 02, 10:39 - 2024 Jul 02, 11:13 * geocentric midpoint of event [JD]: 2460493.95590579 * magnitude of target star: 11.78 * magnitude drop [mag]: 3.96 * estimated maximum duration [s]: 3.320 * Moon: 14 % sunlit, 109° distance * Sun: 152° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.004", 74°) * approx speed of asteroid's shadow [km/s]: 6.3102 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 328-202226 by 1381 Danubia on 2024 Jul 2 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 121 0 0 -26 37 10 11 13 3.4 1 117 -26 -26 30 42 -26 43 37 -26 28 18 -26 46 1 .... 122 0 0 -27 4 42 11 13 2.9 2 117 -27 -26 58 16 -27 11 9 -26 55 52 -27 13 33 0.20 123 0 0 -27 31 47 11 13 2.2 3 116 -28 -27 25 22 -27 38 12 -27 22 58 -27 40 36 0.18 124 0 0 -27 58 24 11 13 1.2 4 116 -28 -27 52 0 -28 4 48 -27 49 37 -28 7 12 0.17 125 0 0 -28 24 33 11 12 59.9 5 115 -29 -28 18 10 -28 30 56 -28 15 47 -28 33 19 0.17 126 0 0 -28 50 14 11 12 58.3 6 115 -30 -28 43 52 -28 56 36 -28 41 29 -28 58 59 0.17 127 0 0 -29 15 26 11 12 56.4 7 114 -31 -29 9 5 -29 21 48 -29 6 43 -29 24 10 0.17 128 0 0 -29 40 10 11 12 54.2 8 114 -32 -29 33 50 -29 46 31 -29 31 29 -29 48 53 0.17 129 0 0 -30 4 26 11 12 51.8 9 113 -33 -29 58 7 -30 10 45 -29 55 46 -30 13 7 0.16 130 0 0 -30 28 14 11 12 49.1 10 113 -34 -30 21 56 -30 34 32 -30 19 35 -30 36 53 0.16 131 0 0 -30 51 32 11 12 46.2 10 112 -35 -30 45 15 -30 57 50 -30 42 55 -31 0 10 0.16 132 0 0 -31 14 23 11 12 43.0 11 112 -36 -31 8 7 -31 20 39 -31 5 47 -31 22 59 0.16 133 0 0 -31 36 45 11 12 39.6 12 111 -37 -31 30 30 -31 43 0 -31 28 10 -31 45 20 0.16 134 0 0 -31 58 39 11 12 36.0 13 111 -38 -31 52 25 -32 4 53 -31 50 5 -32 7 12 0.16 135 0 0 -32 20 4 11 12 32.1 14 110 -38 -32 13 51 -32 26 17 -32 11 32 -32 28 36 0.16 136 0 0 -32 41 1 11 12 28.1 15 110 -39 -32 34 49 -32 47 13 -32 32 30 -32 49 32 0.16 137 0 0 -33 1 30 11 12 23.8 16 109 -40 -32 55 19 -33 7 41 -32 53 1 -33 10 0 0.16 138 0 0 -33 21 31 11 12 19.3 17 109 -41 -33 15 21 -33 27 41 -33 13 3 -33 29 59 0.17 139 0 0 -33 41 4 11 12 14.6 18 108 -42 -33 34 55 -33 47 13 -33 32 37 -33 49 31 0.17 140 0 0 -34 0 9 11 12 9.7 19 107 -43 -33 54 1 -34 6 17 -33 51 44 -34 8 35 0.17 141 0 0 -34 18 46 11 12 4.6 19 107 -43 -34 12 39 -34 24 54 -34 10 22 -34 27 11 0.17 142 0 0 -34 36 56 11 11 59.4 20 106 -44 -34 30 50 -34 43 3 -34 28 33 -34 45 19 0.17 143 0 0 -34 54 38 11 11 53.9 21 106 -45 -34 48 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5 2 33 4 49 45 5 4 56 4 47 22 0.19 - 46 0 0 5 25 24 10 39 59.2 4 245 23 5 31 46 5 19 1 5 34 9 5 16 38 0.20 - 45 0 0 5 54 17 10 39 57.9 3 245 24 6 0 39 5 47 55 6 3 1 5 45 32 0.22 - 44 0 0 6 22 48 10 39 56.9 2 245 25 6 29 9 6 16 26 6 31 31 6 14 4 0.25 - 43 0 0 6 50 56 10 39 56.4 1 245 26 6 57 16 6 44 35 6 59 38 6 42 13 0.35 - 42 0 0 7 18 40 10 39 56.1 0 245 28 7 25 0 7 12 21 7 27 21 7 9 59 2.65 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 328-202226 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 48 01.3614 DE: -24 32 56.707 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 48 01.3614 DE: -24 32 56.707 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 11.8 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1381) Danubia asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.020 distance from Earth [AU]: 1.42100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 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): 0.021", 0.004", 74.133° remarks: * orbital elements for (1381)Danubia : Mean anomaly = 295.4827294917 deg Arg. of pericenter = 29.3795352335 deg Long. of node = 351.7691210972 deg Inclination = 4.6964869250 deg Eccentricity = 0.1804627600 Semimajor axis = 2.4886050420 AU Perihelion dist = 2.0395045077 AU Mag: H = 12.38, G = 0.15 Epoch of elements : MJD 60493.45590708 TDT (2024 Jul 02.4559) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr24,3.32,2024,7,2,10.941739,0.057459,-0.171935,-3.378237,-1.128173,-0.002528,-0.000152,0.000001,0.000000 -132.7301,-24.4578,16.92,22.98,False UCAC4 328-202226,20.80037815,-24.5490854,12.41,11.78,11.44,0.0,0,,20.82471265,-24.4578100,3.96,3.85,0,0,0 1381,Danubia,15.71,20.940,1.4210,0,0,-1.531,-6.98,,1.6,0 0,295.3683,2024,7,2,29.3795,351.7691,4.6965,0.18046,2.48861,2.03950,12.37,5.0,0.15 1.187,0.0210,0.0037,74,0.0038,Known errors,2.29,0,-1,-1 20240702_202226,60140.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org