IOTA/IOTA-ES occultation update for (370) Modestia / TYC 6303-00716-1 event on 2024 Oct 30, 05:57 UT Visible from Summary ------- On 2024 Oct 30 UT, the 41.093470174973 km diameter asteroid (370) Modestia will occult a 10.6 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.65 mag to 15.23 mag (the magnitude of the asteroid) for at most 1.680 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 Oct 30, 05:53 - 2024 Oct 30, 06:01 * geocentric midpoint of event [JD]: 2460613.74810821 * magnitude of target star: 10.60 * magnitude drop [mag]: 4.65 * estimated maximum duration [s]: 1.680 * Moon: 4 % sunlit, 101° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 72°) * approx speed of asteroid's shadow [km/s]: 25.3564 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6303-00716-1 by 370 Modestia on 2024 Oct 30 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 79 0 0 2 50 19 5 53 14.1 0 107 71 2 37 48 3 2 50 2 35 1 3 5 38 .... 80 0 0 2 31 31 5 53 14.2 1 108 72 2 19 1 2 44 1 2 16 14 2 46 49 -0.06 81 0 0 2 12 59 5 53 14.3 2 108 73 2 0 30 2 25 29 1 57 43 2 28 16 -0.16 82 0 0 1 54 44 5 53 14.6 3 108 73 1 42 16 2 7 13 1 39 30 2 10 0 -0.19 83 0 0 1 36 46 5 53 14.9 4 108 74 1 24 19 1 49 14 1 21 33 1 52 0 -0.21 84 0 0 1 19 5 5 53 15.3 5 108 74 1 6 39 1 31 32 1 3 53 1 34 18 -0.22 85 0 0 1 1 42 5 53 15.8 6 108 75 0 49 17 1 14 8 0 46 31 1 16 54 -0.23 86 0 0 0 44 37 5 53 16.4 7 108 75 0 32 13 0 57 1 0 29 27 0 59 48 -0.24 87 0 0 0 27 50 5 53 17.0 9 108 76 0 15 27 0 40 14 0 12 41 0 43 0 -0.24 88 0 0 0 11 22 5 53 17.8 10 108 76 - 0 1 0 0 23 44 - 0 3 46 0 26 30 -0.25 89 0 0 - 0 4 48 5 53 18.6 11 108 76 - 0 17 9 0 7 34 - 0 19 54 0 10 20 -0.25 90 0 0 - 0 20 38 5 53 19.5 12 108 76 - 0 32 58 - 0 8 17 - 0 35 43 - 0 5 32 -0.25 91 0 0 - 0 36 9 5 53 20.5 13 108 76 - 0 48 28 - 0 23 49 - 0 51 13 - 0 21 4 -0.25 92 0 0 - 0 51 20 5 53 21.6 14 108 76 - 1 3 38 - 0 39 1 - 1 6 22 - 0 36 16 -0.25 93 0 0 - 1 6 11 5 53 22.7 15 108 76 - 1 18 28 - 0 53 53 - 1 21 12 - 0 51 8 -0.26 94 0 0 - 1 20 41 5 53 24.0 16 108 76 - 1 32 58 - 1 8 24 - 1 35 42 - 1 5 40 -0.26 95 0 0 - 1 34 52 5 53 25.3 17 108 76 - 1 47 7 - 1 22 36 - 1 49 51 - 1 19 51 -0.26 96 0 0 - 1 48 41 5 53 26.7 18 108 75 - 2 0 56 - 1 36 26 - 2 3 40 - 1 33 42 -0.26 97 0 0 - 2 2 10 5 53 28.1 19 108 75 - 2 14 24 - 1 49 56 - 2 17 7 - 1 47 12 -0.26 98 0 0 - 2 15 17 5 53 29.7 20 108 74 - 2 27 30 - 2 3 4 - 2 30 14 - 2 0 20 -0.26 99 0 0 - 2 28 4 5 53 31.3 21 108 74 - 2 40 16 - 2 15 51 - 2 42 59 - 2 13 7 -0.26 100 0 0 - 2 40 28 5 53 33.0 22 108 73 - 2 52 39 - 2 28 17 - 2 55 23 - 2 25 33 -0.26 101 0 0 - 2 52 31 5 53 34.8 23 108 73 - 3 4 42 - 2 40 20 - 3 7 25 - 2 37 37 -0.26 102 0 0 - 3 4 13 5 53 36.7 24 108 72 - 3 16 22 - 2 52 2 - 3 19 5 - 2 49 19 -0.26 103 0 0 - 3 15 32 5 53 38.6 25 108 71 - 3 27 40 - 3 3 22 - 3 30 23 - 3 0 39 -0.26 104 0 0 - 3 26 28 5 53 40.6 26 108 71 - 3 38 36 - 3 14 20 - 3 41 19 - 3 11 37 -0.27 105 0 0 - 3 37 3 5 53 42.7 27 108 70 - 3 49 10 - 3 24 55 - 3 51 52 - 3 22 13 -0.27 106 0 0 - 3 47 15 5 53 44.8 28 108 69 - 3 59 21 - 3 35 8 - 4 2 3 - 3 32 25 -0.27 107 0 0 - 3 57 4 5 53 47.0 29 108 68 - 4 9 10 - 3 44 58 - 4 11 52 - 3 42 16 -0.27 108 0 0 - 4 6 31 5 53 49.3 30 108 67 - 4 18 36 - 3 54 25 - 4 21 17 - 3 51 43 -0.27 109 0 0 - 4 15 34 5 53 51.7 31 108 67 - 4 27 39 - 4 3 29 - 4 30 20 - 4 0 47 -0.27 110 0 0 - 4 24 15 5 53 54.1 32 108 66 - 4 36 18 - 4 12 10 - 4 39 0 - 4 9 28 -0.27 111 0 0 - 4 32 32 5 53 56.6 33 108 65 - 4 44 35 - 4 20 28 - 4 47 16 - 4 17 47 -0.27 112 0 0 - 4 40 26 5 53 59.1 34 108 64 - 4 52 29 - 4 28 23 - 4 55 10 - 4 25 41 -0.27 113 0 0 - 4 47 57 5 54 1.8 35 108 63 - 4 59 59 - 4 35 54 - 5 2 40 - 4 33 13 -0.27 114 0 0 - 4 55 4 5 54 4.4 36 108 62 - 5 7 6 - 4 43 2 - 5 9 47 - 4 40 21 -0.27 115 0 0 - 5 1 48 5 54 7.2 37 108 61 - 5 13 49 - 4 49 46 - 5 16 30 - 4 47 5 -0.27 116 0 0 - 5 8 8 5 54 10.0 38 108 60 - 5 20 8 - 4 56 7 - 5 22 49 - 4 53 26 -0.27 117 0 0 - 5 14 4 5 54 12.9 39 108 60 - 5 26 4 - 5 2 4 - 5 28 45 - 4 59 23 -0.27 118 0 0 - 5 19 37 5 54 15.8 40 108 59 - 5 31 36 - 5 7 37 - 5 34 17 - 5 4 56 -0.27 119 0 0 - 5 24 46 5 54 18.8 41 108 58 - 5 36 45 - 5 12 46 - 5 39 25 - 5 10 5 -0.27 120 0 0 - 5 29 30 5 54 21.8 42 109 57 - 5 41 29 - 5 17 31 - 5 44 10 - 5 14 50 -0.27 121 0 0 - 5 33 51 5 54 24.9 43 109 56 - 5 45 50 - 5 21 52 - 5 48 30 - 5 19 11 -0.27 122 0 0 - 5 37 48 5 54 28.1 44 109 55 - 5 49 46 - 5 25 49 - 5 52 26 - 5 23 8 -0.27 123 0 0 - 5 41 20 5 54 31.3 45 109 54 - 5 53 18 - 5 29 22 - 5 55 58 - 5 26 41 -0.27 124 0 0 - 5 44 29 5 54 34.6 46 109 53 - 5 56 26 - 5 32 30 - 5 59 7 - 5 29 50 -0.27 125 0 0 - 5 47 13 5 54 37.9 47 109 52 - 5 59 10 - 5 35 15 - 6 1 50 - 5 32 34 -0.27 126 0 0 - 5 49 33 5 54 41.3 48 110 51 - 6 1 30 - 5 37 35 - 6 4 10 - 5 34 54 -0.27 127 0 0 - 5 51 29 5 54 44.7 49 110 50 - 6 3 26 - 5 39 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6303-00716-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 39 45.1699 DE: -17 29 31.595 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 39 45.1699 DE: -17 29 31.595 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 10.6 * B mag [mag]: 12.8 * Diameter [mas]: 0.90 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (370) Modestia asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.026 distance from Earth [AU]: 2.15020 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.019", 0.002", 72.103° remarks: * orbital elements for (370)Modestia : Mean anomaly = 327.4248956764 deg Arg. of pericenter = 68.6047296926 deg Long. of node = 290.8797685634 deg Inclination = 7.8622036939 deg Eccentricity = 0.0904914306 Semimajor axis = 2.3244147997 AU Perihelion dist = 2.1140751791 AU Mag: H = 10.71, G = 0.15 Epoch of elements : MJD 60613.24810800 TDT (2024 Oct 30.2481) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.68,2024,10,30,5.954597,-0.057387,0.259243,13.978501,3.070971,0.005301,0.001003,0.000000,0.000000 166.9272,-17.4358,86.59,-13.95,False TYC 6303-00716-1,19.66254723,-17.4921097,12.77,10.60,9.43,0.9,4,,19.68624743,-17.4357814,4.65,5.36,0,0,0 370,Modestia,15.23,42.497,2.1502,0,0,3.995,12.56,,2.4,0 0,327.3559,2024,10,30,68.6047,290.8798,7.8622,0.09049,2.32441,2.11408,10.70,5.0,0.15 1.112,0.0187,0.0025,72,0.0030,Known errors,1.12,0,-1,-1 20241030_0716-1,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org