IOTA/IOTA-ES occultation update for (1241) Dysona / TYC 7924-00134-1 event on 2024 Mar 08, 20:05 UT Visible from Summary ------- On 2024 Mar 08 UT, the 78.9175060108625 km diameter asteroid (1241) Dysona will occult a 10.9 mag star in the constellation Corona Australis for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.45 mag to 15.31 mag (the magnitude of the asteroid) for at most 2.720 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 Mar 08, 20:01 - 2024 Mar 08, 20:09 * geocentric midpoint of event [JD]: 2460378.33717683 * magnitude of target star: 10.88 * magnitude drop [mag]: 4.45 * estimated maximum duration [s]: 2.720 * Moon: 4 % sunlit, 46° distance * Sun: 68° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.027", 0.002", 65°) * approx speed of asteroid's shadow [km/s]: 29.0657 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7924-00134-1 by 1241 Dysona on 2024 Mar 8 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 77 0 0 -12 28 17 20 2 1.8 1 133 -68 -12 59 14 -11 57 27 -13 20 0 .. .. .. .... 78 0 0 -13 23 56 20 2 2.0 2 133 -66 -13 54 59 -12 53 0 -14 15 48 -12 32 23 0.31 79 0 0 -14 19 43 20 2 2.2 3 133 -65 -14 50 52 -13 48 42 -15 11 45 -13 28 1 0.31 80 0 0 -15 15 37 20 2 2.6 5 132 -64 -15 46 51 -14 44 31 -16 7 48 -14 23 47 0.31 81 0 0 -16 11 34 20 2 3.1 6 132 -62 -16 42 52 -15 40 23 -17 3 52 -15 19 36 0.31 82 0 0 -17 7 31 20 2 3.7 7 132 -61 -17 38 53 -16 36 17 -17 59 56 -16 15 27 0.31 83 0 0 -18 3 26 20 2 4.4 9 132 -60 -18 34 51 -17 32 8 -18 55 56 -17 11 16 0.31 84 0 0 -18 59 14 20 2 5.3 10 131 -58 -19 30 43 -18 27 53 -19 51 50 -18 7 0 0.31 85 0 0 -19 54 55 20 2 6.3 11 131 -57 -20 26 25 -19 23 31 -20 47 34 -19 2 36 0.31 86 0 0 -20 50 23 20 2 7.4 13 130 -56 -21 21 56 -20 18 58 -21 43 5 -19 58 2 0.31 87 0 0 -21 45 37 20 2 8.6 14 130 -54 -22 17 11 -21 14 11 -22 38 21 -20 53 14 0.31 88 0 0 -22 40 34 20 2 9.9 15 130 -53 -23 12 8 -22 9 7 -23 33 19 -21 48 9 0.31 89 0 0 -23 35 11 20 2 11.3 16 129 -52 -24 6 45 -23 3 44 -24 27 56 -22 42 46 0.31 90 0 0 -24 29 25 20 2 12.8 18 129 -50 -25 0 58 -23 57 58 -25 22 9 -23 37 1 0.31 91 0 0 -25 23 13 20 2 14.5 19 128 -49 -25 54 45 -24 51 48 -26 15 55 -24 30 51 0.31 92 0 0 -26 16 33 20 2 16.2 20 128 -48 -26 48 4 -25 45 10 -27 9 13 -25 24 14 0.31 93 0 0 -27 9 23 20 2 18.0 22 127 -47 -27 40 52 -26 38 2 -28 1 58 -26 17 8 0.31 94 0 0 -28 1 40 20 2 19.9 23 127 -45 -28 33 6 -27 30 22 -28 54 11 -27 9 29 0.31 95 0 0 -28 53 22 20 2 21.8 24 126 -44 -29 24 44 -28 22 7 -29 45 47 -28 1 17 0.31 96 0 0 -29 44 27 20 2 23.9 25 126 -43 -30 15 45 -29 13 16 -30 36 45 -28 52 28 0.31 97 0 0 -30 34 52 20 2 26.0 26 125 -42 -31 6 6 -30 3 46 -31 27 3 -29 43 2 0.31 98 0 0 -31 24 37 20 2 28.2 28 124 -40 -31 55 46 -30 53 35 -32 16 39 -30 32 55 0.31 99 0 0 -32 13 39 20 2 30.4 29 124 -39 -32 44 42 -31 42 43 -33 5 32 -31 22 6 0.31 100 0 0 -33 1 57 20 2 32.7 30 123 -38 -33 32 54 -32 31 7 -33 53 40 -32 10 33 0.31 101 0 0 -33 49 29 20 2 35.0 31 123 -37 -34 20 20 -33 18 45 -34 41 1 -32 58 16 0.31 102 0 0 -34 36 15 20 2 37.4 32 122 -36 -35 6 58 -34 5 38 -35 27 35 -33 45 13 0.31 103 0 0 -35 22 12 20 2 39.9 33 121 -35 -35 52 48 -34 51 42 -36 13 20 -34 31 22 0.31 104 0 0 -36 7 20 20 2 42.4 34 120 -34 -36 37 49 -35 36 58 -36 58 15 -35 16 43 0.31 105 0 0 -36 51 39 20 2 44.9 35 120 -33 -37 21 59 -36 21 25 -37 42 20 -36 1 15 0.31 106 0 0 -37 35 7 20 2 47.4 36 119 -31 -38 5 19 -37 5 1 -38 25 34 -36 44 57 0.31 107 0 0 -38 17 43 20 2 50.0 37 118 -30 -38 47 47 -37 47 46 -39 7 56 -37 27 48 0.31 108 0 0 -38 59 28 20 2 52.6 38 117 -29 -39 29 23 -38 29 40 -39 49 26 -38 9 47 0.31 109 0 0 -39 40 21 20 2 55.2 39 116 -28 -40 10 6 -39 10 42 -40 30 3 -38 50 56 0.31 110 0 0 -40 20 22 20 2 57.9 40 116 -27 -40 49 58 -39 50 52 -41 9 48 -39 31 12 0.31 111 0 0 -40 59 30 20 3 0.5 41 115 -26 -41 28 56 -40 30 10 -41 48 40 -40 10 36 0.31 112 0 0 -41 37 46 20 3 3.2 42 114 -25 -42 7 2 -41 8 35 -42 26 40 -40 49 8 0.31 113 0 0 -42 15 9 20 3 5.8 43 113 -24 -42 44 16 -41 46 9 -43 3 46 -41 26 48 0.31 114 0 0 -42 51 41 20 3 8.5 44 112 -23 -43 20 37 -42 22 50 -43 40 1 -42 3 36 0.31 115 0 0 -43 27 20 20 3 11.2 45 111 -22 -43 56 6 -42 58 39 -44 15 23 -42 39 32 0.31 116 0 0 -44 2 7 20 3 13.8 46 110 -22 -44 30 43 -43 33 37 -44 49 53 -43 14 37 0.31 117 0 0 -44 36 4 20 3 16.5 47 109 -21 -45 4 29 -44 7 44 -45 23 32 -43 48 50 0.31 118 0 0 -45 9 9 20 3 19.2 48 108 -20 -45 37 23 -44 40 59 -45 56 20 -44 22 12 0.31 119 0 0 -45 41 23 20 3 21.8 49 107 -19 -46 9 28 -45 13 24 -46 28 17 -44 54 44 0.31 120 0 0 -46 12 48 20 3 24.5 49 106 -18 -46 40 42 -45 44 59 -46 59 24 -45 26 26 0.31 121 0 0 -46 43 24 20 3 27.1 50 105 -17 -47 11 7 -46 15 45 -47 29 42 -45 57 19 0.31 122 0 0 -47 13 10 20 3 29.8 51 103 -16 -47 40 43 -46 45 42 -47 59 11 -46 27 22 0.31 123 0 0 -47 42 9 20 3 32.4 52 102 -15 -48 9 31 -47 14 51 -48 27 52 -46 56 38 0.31 124 0 0 -48 10 20 20 3 35.0 53 101 -15 -48 37 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37 -30 25 8 -28 40 49 0.32 -100 0 0 -28 41 36 20 8 44.1 23 233 60 -29 12 59 -28 10 21 -29 34 2 -27 49 31 0.33 - 99 0 0 -27 49 47 20 8 46.0 22 233 60 -28 21 13 -27 18 28 -28 42 19 -26 57 36 0.33 - 98 0 0 -26 57 23 20 8 47.8 20 232 60 -27 28 52 -26 26 2 -27 50 0 -26 5 8 0.33 - 97 0 0 -26 4 27 20 8 49.5 19 232 59 -26 35 59 -25 33 4 -26 57 7 -25 12 8 0.33 - 96 0 0 -25 11 2 20 8 51.1 18 231 59 -25 42 34 -24 39 36 -26 3 44 -24 18 40 0.33 - 95 0 0 -24 17 8 20 8 52.6 17 231 59 -24 48 42 -23 45 42 -25 9 52 -23 24 45 0.33 - 94 0 0 -23 22 50 20 8 54.0 15 230 59 -23 54 24 -22 51 23 -24 15 35 -22 30 26 0.34 - 93 0 0 -22 28 10 20 8 55.3 14 230 59 -22 59 44 -21 56 43 -23 20 54 -21 35 46 0.34 - 92 0 0 -21 33 10 20 8 56.5 13 230 58 -22 4 43 -21 1 44 -22 25 53 -20 40 47 0.34 - 91 0 0 -20 37 53 20 8 57.6 11 229 58 -21 9 25 -20 6 29 -21 30 34 -19 45 33 0.35 - 90 0 0 -19 42 23 20 8 58.6 10 229 57 -20 13 53 -19 11 1 -20 35 1 -18 50 6 0.35 - 89 0 0 -18 46 42 20 8 59.5 9 228 57 -19 18 9 -18 15 22 -19 39 16 -17 54 29 0.36 - 88 0 0 -17 50 53 20 9 0.2 7 228 56 -18 22 17 -17 19 36 -18 43 21 -16 58 45 0.37 - 87 0 0 -16 54 59 20 9 0.9 6 228 56 -17 26 20 -16 23 45 -17 47 21 -16 2 56 0.38 - 86 0 0 -15 59 3 20 9 1.4 5 228 55 -16 30 19 -15 27 53 -16 51 18 -15 7 7 0.40 - 85 0 0 -15 3 7 20 9 1.7 3 227 54 -15 34 19 -14 32 2 -15 55 15 -14 11 19 0.43 - 84 0 0 -14 7 16 20 9 2.0 2 227 54 -14 38 23 -13 36 16 -14 59 15 -13 15 36 0.52 - 83 0 0 -13 11 31 20 9 2.1 1 227 53 -13 42 32 -12 40 37 -14 3 21 -12 20 1 0.91 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: TYC 7924-00134-1 * constellation : Corona Australis * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 58 51.8762 DE: -42 03 44.587 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 58 51.8762 DE: -42 03 44.587 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1241) Dysona asteroid class: approx. diameter [km]: 79 approx. diameter ["]: 0.035 distance from Earth [AU]: 3.10910 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.027", 0.002", 65.4° remarks: * orbital elements for (1241)Dysona : Mean anomaly = 341.1544764043 deg Arg. of pericenter = 320.5886107182 deg Long. of node = 322.1581131813 deg Inclination = 23.5127263789 deg Eccentricity = 0.1000325614 Semimajor axis = 3.1901773691 AU Perihelion dist = 2.8710557556 AU Mag: H = 9.60, G = 0.15 Epoch of elements : MJD 60377.83717662 TDT (2024 Mar 08.8372) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,2.72,2024,3,8,20.092244,-0.001790,-0.287089,16.405015,-0.124279,-0.005304,-0.001354,-0.000001,0.000000 176.7403,-42.0288,-118.74,-4.45,False TYC 7924-00134-1,18.98107667,-42.0623853,11.55,10.88,10.52,0.1,0,,19.00927448,-42.0288492,4.45,4.37,0,0,0 1241,Dysona,15.31,79.143,3.1091,0,0,4.165,-0.35,,4.0,0 0,341.0097,2024,3,8,320.5886,322.1581,23.5127,0.10003,3.19018,2.87106,9.59,5.0,0.15 1.334,0.0273,0.0021,65,0.0117,Known errors,0.98,0,-1,-1 20240308_0134-1,60139.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org