IOTA/IOTA-ES occultation update for (1680) Per / UCAC4 335-214390 event on 2024 Oct 06, 21:13 UT Visible from Summary ------- On 2024 Oct 06 UT, the 14.544 km diameter asteroid (1680) Per will occult a 11.0 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 4.78 mag to 15.78 mag (the magnitude of the asteroid) for at most 2.060 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 06, 20:58 - 2024 Oct 06, 21:28 * geocentric midpoint of event [JD]: 2460590.38434821 * magnitude of target star: 11.01 * magnitude drop [mag]: 4.78 * estimated maximum duration [s]: 2.060 * Moon: 14 % sunlit, 70° distance * Sun: 114° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.001", 78°) * approx speed of asteroid's shadow [km/s]: 7.0770 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 335-214390 by 1680 Per on 2024 Oct 6 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 -122 0 0 -30 4 2 20 58 32.7 1 116 61 -30 8 28 -29 59 35 -30 11 40 -29 56 23 .... -121 0 0 -30 29 42 20 58 33.1 2 116 61 -30 34 8 -30 25 16 -30 37 19 -30 22 5 0.18 -120 0 0 -30 54 51 20 58 33.8 3 115 60 -30 59 15 -30 50 26 -31 2 26 -30 47 15 0.17 -119 0 0 -31 19 28 20 58 34.7 4 115 59 -31 23 51 -31 15 4 -31 27 2 -31 11 53 0.16 -118 0 0 -31 43 33 20 58 35.8 5 114 58 -31 47 56 -31 39 10 -31 51 5 -31 36 0 0.16 -117 0 0 -32 7 6 20 58 37.2 6 114 57 -32 11 28 -32 2 44 -32 14 37 -31 59 35 0.15 -116 0 0 -32 30 7 20 58 38.8 7 113 56 -32 34 28 -32 25 45 -32 37 36 -32 22 37 0.15 -115 0 0 -32 52 36 20 58 40.6 8 113 56 -32 56 56 -32 48 15 -33 0 4 -32 45 8 0.15 -114 0 0 -33 14 33 20 58 42.7 8 112 55 -33 18 52 -33 10 13 -33 21 59 -33 7 6 0.15 -113 0 0 -33 35 57 20 58 44.9 9 111 54 -33 40 16 -33 31 39 -33 43 23 -33 28 32 0.15 -112 0 0 -33 56 50 20 58 47.4 10 111 53 -34 1 8 -33 52 32 -34 4 14 -33 49 26 0.14 -111 0 0 -34 17 11 20 58 50.1 11 110 52 -34 21 27 -34 12 54 -34 24 33 -34 9 48 0.14 -110 0 0 -34 36 59 20 58 53.0 12 110 51 -34 41 15 -34 32 43 -34 44 20 -34 29 38 0.14 -109 0 0 -34 56 16 20 58 56.1 13 109 50 -35 0 31 -34 52 0 -35 3 35 -34 48 56 0.14 -108 0 0 -35 15 0 20 58 59.3 14 109 50 -35 19 15 -35 10 46 -35 22 18 -35 7 42 0.14 -107 0 0 -35 33 13 20 59 2.8 15 108 49 -35 37 27 -35 28 59 -35 40 30 -35 25 57 0.14 -106 0 0 -35 50 54 20 59 6.5 16 107 48 -35 55 7 -35 46 41 -35 58 9 -35 43 39 0.14 -105 0 0 -36 8 3 20 59 10.3 16 107 47 -36 12 16 -36 3 51 -36 15 17 -36 0 50 0.14 -104 0 0 -36 24 41 20 59 14.3 17 106 46 -36 28 53 -36 20 30 -36 31 54 -36 17 29 0.14 -103 0 0 -36 40 48 20 59 18.5 18 106 46 -36 44 58 -36 36 37 -36 47 59 -36 33 37 0.14 -102 0 0 -36 56 23 20 59 22.8 19 105 45 -37 0 33 -36 52 13 -37 3 33 -36 49 13 0.14 -101 0 0 -37 11 27 20 59 27.4 20 104 44 -37 15 36 -37 7 18 -37 18 36 -37 4 18 0.13 -100 0 0 -37 26 0 20 59 32.0 21 104 43 -37 30 8 -37 21 51 -37 33 7 -37 18 52 0.13 - 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9 38 44 21 22 29.9 52 245 -61 - 9 43 39 - 9 33 48 - 9 47 12 - 9 30 16 0.14 13 0 0 - 8 55 33 21 22 45.7 51 244 -63 - 9 0 28 - 8 50 38 - 9 4 1 - 8 47 5 0.15 14 0 0 - 8 12 18 21 23 1.2 50 244 -64 - 8 17 13 - 8 7 23 - 8 20 46 - 8 3 50 0.15 15 0 0 - 7 29 1 21 23 16.4 48 243 -65 - 7 33 57 - 7 24 6 - 7 37 29 - 7 20 34 0.15 16 0 0 - 6 45 45 21 23 31.4 47 243 -66 - 6 50 39 - 6 40 50 - 6 54 12 - 6 37 17 0.15 17 0 0 - 6 2 29 21 23 46.0 46 243 -68 - 6 7 24 - 5 57 35 - 6 10 57 - 5 54 2 0.15 18 0 0 - 5 19 18 21 24 0.3 45 243 -69 - 5 24 12 - 5 14 23 - 5 27 45 - 5 10 51 0.15 19 0 0 - 4 36 12 21 24 14.3 43 242 -70 - 4 41 6 - 4 31 18 - 4 44 38 - 4 27 46 0.15 20 0 0 - 3 53 13 21 24 28.0 42 242 -72 - 3 58 6 - 3 48 19 - 4 1 38 - 3 44 47 0.15 21 0 0 - 3 10 23 21 24 41.3 41 242 -73 - 3 15 16 - 3 5 29 - 3 18 47 - 3 1 58 0.15 22 0 0 - 2 27 43 21 24 54.2 40 242 -74 - 2 32 36 - 2 22 50 - 2 36 7 - 2 19 19 0.15 23 0 0 - 1 45 16 21 25 6.8 38 242 -75 - 1 50 9 - 1 40 24 - 1 53 39 - 1 36 53 0.15 24 0 0 - 1 3 3 21 25 19.0 37 242 -77 - 1 7 55 - 0 58 12 - 1 11 26 - 0 54 42 0.15 25 0 0 - 0 21 6 21 25 30.8 36 241 -78 - 0 25 57 - 0 16 15 - 0 29 27 - 0 12 45 0.15 26 0 0 0 20 34 21 25 42.2 35 241 -79 0 15 43 0 25 24 0 12 14 0 28 54 0.16 27 0 0 1 1 55 21 25 53.3 33 241 -80 0 57 5 1 6 45 0 53 37 1 10 14 0.16 28 0 0 1 42 57 21 26 3.9 32 241 -82 1 38 8 1 47 46 1 34 39 1 51 14 0.16 29 0 0 2 23 36 21 26 14.1 31 241 -83 2 18 48 2 28 25 2 15 20 2 31 52 0.16 30 0 0 3 3 53 21 26 24.0 30 241 -84 2 59 6 3 8 41 2 55 39 3 12 8 0.16 31 0 0 3 43 46 21 26 33.4 28 241 -85 3 39 0 3 48 33 3 35 33 3 52 0 0.16 32 0 0 4 23 14 21 26 42.4 27 241 -86 4 18 29 4 28 0 4 15 3 4 31 26 0.16 33 0 0 5 2 16 21 26 51.0 26 241 -88 4 57 31 5 7 1 4 54 6 5 10 26 0.16 34 0 0 5 40 50 21 26 59.2 25 241 -89 5 36 6 5 45 34 5 32 42 5 48 59 0.16 35 0 0 6 18 56 21 27 6.9 23 241 -89 6 14 13 6 23 39 6 10 49 6 27 3 0.16 36 0 0 6 56 33 21 27 14.3 22 242 -88 6 51 51 7 1 15 6 48 28 7 4 38 0.16 37 0 0 7 33 40 21 27 21.3 21 242 -87 7 28 59 7 38 21 7 25 36 7 41 43 0.16 38 0 0 8 10 16 21 27 27.8 20 242 -86 8 5 35 8 14 56 8 2 13 8 18 17 0.16 39 0 0 8 46 20 21 27 34.0 19 242 -85 8 41 41 8 50 59 8 38 20 8 54 20 0.16 40 0 0 9 21 52 21 27 39.7 18 242 -84 9 17 14 9 26 30 9 13 53 9 29 50 0.16 41 0 0 9 56 51 21 27 45.1 16 242 -83 9 52 14 10 1 28 9 48 54 10 4 48 0.16 42 0 0 10 31 17 21 27 50.0 15 242 -81 10 26 41 10 35 53 10 23 22 10 39 12 0.16 43 0 0 11 5 9 21 27 54.6 14 243 -80 11 0 34 11 9 44 10 57 16 11 13 2 0.17 44 0 0 11 38 27 21 27 58.8 13 243 -79 11 33 53 11 43 1 11 30 36 11 46 18 0.17 45 0 0 12 11 10 21 28 2.7 12 243 -78 12 6 37 12 15 43 12 3 20 12 19 0 0.17 46 0 0 12 43 18 21 28 6.1 11 243 -77 12 38 46 12 47 50 12 35 30 12 51 6 0.17 47 0 0 13 14 51 21 28 9.2 10 243 -76 13 10 20 13 19 22 13 7 5 13 22 37 0.17 48 0 0 13 45 48 21 28 12.0 8 244 -75 13 41 18 13 50 18 13 38 4 13 53 32 0.17 49 0 0 14 16 10 21 28 14.4 7 244 -74 14 11 41 14 20 38 14 8 27 14 23 52 0.18 50 0 0 14 45 55 21 28 16.4 6 244 -73 14 41 27 14 50 23 14 38 14 14 53 36 0.18 51 0 0 15 15 5 21 28 18.1 5 244 -71 15 10 38 15 19 31 15 7 25 15 22 44 0.19 52 0 0 15 43 38 21 28 19.5 4 245 -70 15 39 12 15 48 4 15 36 0 15 51 15 0.20 53 0 0 16 11 35 21 28 20.5 3 245 -69 16 7 10 16 16 0 16 3 59 16 19 10 0.22 54 0 0 16 38 56 21 28 21.2 2 245 -68 16 34 32 16 43 19 16 31 22 16 46 29 0.25 55 0 0 17 5 40 21 28 21.6 1 246 -67 17 1 17 17 10 3 16 58 8 17 13 12 0.37 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 335-214390 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 45 06.4040 DE: -23 09 12.671 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 45 06.4038 DE: -23 09 12.672 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.0 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1680) Per asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.010 distance from Earth [AU]: 2.04100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.014", 0.001", 77.971° remarks: * orbital elements for (1680)Per : Mean anomaly = 66.2196422346 deg Arg. of pericenter = 158.0886826500 deg Long. of node = 83.3271637952 deg Inclination = 4.2599071364 deg Eccentricity = 0.1817420999 Semimajor axis = 2.7249400300 AU Perihelion dist = 2.2297037068 AU Mag: H = 11.13, G = 0.15 Epoch of elements : MJD 60589.88434779 TDT (2024 Oct 06.8843) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,2.06,2024,10,6,21.224357,0.050960,-0.105039,3.601250,1.728224,0.004998,0.001581,0.000001,0.000000 -22.7441,-23.0643,-141.40,-5.56,False UCAC4 335-214390,20.75177892,-23.1535197,11.27,11.01,10.87,0.0,0,,20.77602908,-23.0642758,4.78,4.48,0,0,0 1680,Per,15.78,14.544,2.0410,0,0,1.125,7.45,,1.0,0 0,66.0259,2024,10,6,158.0887,83.3272,4.2599,0.18174,2.72494,2.22970,11.13,5.0,0.15 1.360,0.0143,0.0011,78,0.0036,Known errors,1.13,0,-1,-1 20241006_214390,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org