IOTA/IOTA-ES occultation update for (328) Gudrun / TYC 6723-01097-1 event on 2024 Jul 24, 09:17 UT Visible from Summary ------- On 2024 Jul 24 UT, the 129.355 km diameter asteroid (328) Gudrun will occult a 11.6 mag star in the constellation Hydra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.35 mag to 14.88 mag (the magnitude of the asteroid) for at most 9.180 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 24, 09:10 - 2024 Jul 24, 09:24 * geocentric midpoint of event [JD]: 2460515.88729867 * magnitude of target star: 11.58 * magnitude drop [mag]: 3.35 * estimated maximum duration [s]: 9.180 * Moon: 89 % sunlit, 124° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 138 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.004", 124°) * approx speed of asteroid's shadow [km/s]: 14.0855 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6723-01097-1 by 328 Gudrun on 2024 Jul 24 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 49 0 0 20 47 24 9 10 37.7 0 120 85 20 4 39 .. .. .. 19 51 8 .. .. .. .... 50 0 0 20 15 3 9 10 37.9 1 120 84 19 32 19 20 58 0 19 18 49 21 11 40 -0.09 51 0 0 19 42 38 9 10 38.2 3 121 83 18 59 55 20 25 34 18 46 25 20 39 14 -0.20 52 0 0 19 10 11 9 10 38.6 4 121 82 18 27 29 19 53 6 18 13 59 20 6 45 -0.25 53 0 0 18 37 41 9 10 39.3 5 121 81 17 55 1 19 20 35 17 41 32 19 34 13 -0.27 54 0 0 18 5 11 9 10 40.1 6 122 80 17 22 32 18 48 2 17 9 3 19 1 41 -0.29 55 0 0 17 32 40 9 10 41.1 7 122 79 16 50 4 18 15 30 16 36 35 18 29 7 -0.30 56 0 0 17 0 11 9 10 42.3 8 122 78 16 17 36 17 42 58 16 4 9 17 56 35 -0.31 57 0 0 16 27 43 9 10 43.7 9 122 77 15 45 11 17 10 28 15 31 44 17 24 4 -0.31 58 0 0 15 55 19 9 10 45.2 10 123 76 15 12 49 16 38 1 14 59 23 16 51 36 -0.32 59 0 0 15 22 58 9 10 47.0 11 123 75 14 40 32 16 5 38 14 27 7 16 19 12 -0.32 60 0 0 14 50 43 9 10 48.9 12 123 74 14 8 19 15 33 19 13 54 55 15 46 52 -0.32 61 0 0 14 18 33 9 10 51.0 13 124 73 13 36 13 15 1 6 13 22 50 15 14 39 -0.33 62 0 0 13 46 31 9 10 53.3 15 124 72 13 4 14 14 29 0 12 50 52 14 42 31 -0.33 63 0 0 13 14 36 9 10 55.7 16 124 71 12 32 23 13 57 2 12 19 2 14 10 32 -0.33 64 0 0 12 42 51 9 10 58.3 17 124 69 12 0 41 13 25 12 11 47 22 13 38 41 -0.33 65 0 0 12 11 15 9 11 1.2 18 125 68 11 29 10 12 53 33 11 15 51 13 7 0 -0.33 66 0 0 11 39 50 9 11 4.1 19 125 67 10 57 49 12 22 3 10 44 32 12 35 29 -0.33 67 0 0 11 8 37 9 11 7.3 20 125 66 10 26 40 11 50 46 10 13 25 12 4 11 -0.34 68 0 0 10 37 37 9 11 10.6 21 125 65 9 55 45 11 19 41 9 42 30 11 33 4 -0.34 69 0 0 10 6 50 9 11 14.1 22 126 64 9 25 3 10 48 50 9 11 50 11 2 11 -0.34 70 0 0 9 36 18 9 11 17.8 23 126 63 8 54 35 10 18 13 8 41 24 10 31 33 -0.34 71 0 0 9 6 1 9 11 21.7 25 126 62 8 24 24 9 47 51 8 11 14 10 1 9 -0.34 72 0 0 8 36 1 9 11 25.7 26 126 61 7 54 28 9 17 45 7 41 20 9 31 2 -0.34 73 0 0 8 6 18 9 11 29.8 27 127 59 7 24 50 8 47 57 7 11 44 9 1 12 -0.34 74 0 0 7 36 52 9 11 34.2 28 127 58 6 55 31 8 18 26 6 42 26 8 31 39 -0.34 75 0 0 7 7 46 9 11 38.7 29 127 57 6 26 30 7 49 14 6 13 27 8 2 25 -0.34 76 0 0 6 38 59 9 11 43.3 30 127 56 5 57 48 7 20 21 5 44 47 7 33 31 -0.35 77 0 0 6 10 32 9 11 48.1 31 128 55 5 29 27 6 51 49 5 16 28 7 4 57 -0.35 78 0 0 5 42 27 9 11 53.0 32 128 54 5 1 27 6 23 37 4 48 30 6 36 44 -0.35 79 0 0 5 14 43 9 11 58.1 33 128 53 4 33 49 5 55 48 4 20 53 6 8 52 -0.35 80 0 0 4 47 21 9 12 3.4 34 128 52 4 6 33 5 28 20 3 53 40 5 41 22 -0.35 81 0 0 4 20 23 9 12 8.7 36 129 50 3 39 41 5 1 16 3 26 49 5 14 16 -0.35 82 0 0 3 53 48 9 12 14.2 37 129 49 3 13 12 4 34 35 3 0 22 4 47 33 -0.35 83 0 0 3 27 37 9 12 19.9 38 129 48 2 47 8 4 8 18 2 34 19 4 21 15 -0.35 84 0 0 3 1 52 9 12 25.6 39 130 47 2 21 28 3 42 27 2 8 42 3 55 21 -0.35 85 0 0 2 36 32 9 12 31.5 40 130 46 1 56 14 3 17 1 1 43 29 3 29 53 -0.35 86 0 0 2 11 38 9 12 37.5 41 130 45 1 31 26 2 52 0 1 18 43 3 4 51 -0.35 87 0 0 1 47 10 9 12 43.7 42 131 44 1 7 4 2 27 27 0 54 23 2 40 15 -0.35 88 0 0 1 23 9 9 12 49.9 43 131 43 0 43 10 2 3 20 0 30 31 2 16 7 -0.35 89 0 0 0 59 36 9 12 56.3 44 131 42 0 19 42 1 39 41 0 7 5 1 52 25 -0.35 90 0 0 0 36 31 9 13 2.7 45 132 41 - 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Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6723-01097-1 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 48 19.3275 DE: -27 32 07.830 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 48 19.3274 DE: -27 32 07.830 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.6 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (328) Gudrun asteroid class: approx. diameter [km]: 129 approx. diameter ["]: 0.057 distance from Earth [AU]: 3.10980 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): 0.017", 0.004", 123.762° remarks: * orbital elements for (328)Gudrun : Mean anomaly = 125.7669602008 deg Arg. of pericenter = 107.4685255190 deg Long. of node = 351.8834469316 deg Inclination = 16.1304148655 deg Eccentricity = 0.1076328781 Semimajor axis = 3.1096460875 AU Perihelion dist = 2.7749459294 AU Mag: H = 8.88, G = 0.15 Epoch of elements : MJD 60515.38729880 TDT (2024 Jul 24.3873) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,9.18,2024,7,24,9.295168,0.021067,0.345018,7.935906,-0.477339,0.005277,-0.001972,0.000000,0.000000 125.4069,-27.6595,42.21,19.72,False TYC 6723-01097-1,13.80536877,-27.5355085,11.87,11.58,11.42,0.0,0,,13.82840393,-27.6595107,3.35,3.07,0,0,0 328,Gudrun,14.88,129.355,3.1098,0,0,1.689,-1.35,,6.6,0 0,125.6973,2024,7,24,107.4685,351.8834,16.1304,0.10763,3.10965,2.77495,8.88,5.0,0.15 1.159,0.0167,0.0040,124,0.0091,Known errors,0.93,0,-1,-1 20240724_1097-1,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org