IOTA/IOTA-ES occultation update for (715) Transvaalia / UCAC4 599-045813 event on 2024 Oct 25, 18:45 UT Visible from Summary ------- On 2024 Oct 25 UT, the 28.673 km diameter asteroid (715) Transvaalia will occult a 11.5 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.24 mag to 15.67 mag (the magnitude of the asteroid) for at most 1.400 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 25, 18:40 - 2024 Oct 25, 18:50 * geocentric midpoint of event [JD]: 2460609.28182096 * magnitude of target star: 11.45 * magnitude drop [mag]: 4.24 * estimated maximum duration [s]: 1.400 * Moon: 36 % sunlit, 13° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 0.28 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 107°) * approx speed of asteroid's shadow [km/s]: 20.4651 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 599-045813 by 715 Transvaalia on 2024 Oct 25 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 88 0 0 8 55 38 18 40 45.7 1 60 -77 8 46 24 9 4 52 8 41 17 9 9 59 .... 89 0 0 9 30 19 18 40 45.8 2 60 -77 9 21 5 9 39 34 9 15 58 9 44 42 -0.25 90 0 0 10 5 6 18 40 46.1 3 60 -76 9 55 51 10 14 22 9 50 44 10 19 29 -0.25 91 0 0 10 39 57 18 40 46.5 4 61 -75 10 30 41 10 49 13 10 25 34 10 54 20 -0.24 92 0 0 11 14 50 18 40 47.1 5 61 -74 11 5 34 11 24 6 11 0 27 11 29 15 -0.24 93 0 0 11 49 45 18 40 47.7 7 61 -73 11 40 29 11 59 2 11 35 21 12 4 10 -0.24 94 0 0 12 24 41 18 40 48.5 8 61 -72 12 15 24 12 33 58 12 10 16 12 39 6 -0.24 95 0 0 12 59 36 18 40 49.5 9 61 -71 12 50 19 13 8 53 12 45 11 13 14 2 -0.24 96 0 0 13 34 29 18 40 50.5 10 62 -70 13 25 12 13 43 47 13 20 4 13 48 56 -0.24 97 0 0 14 9 20 18 40 51.6 11 62 -69 14 0 3 14 18 38 13 54 55 14 23 46 -0.24 98 0 0 14 44 7 18 40 52.9 12 62 -68 14 34 50 14 53 25 14 29 42 14 58 34 -0.24 99 0 0 15 18 49 18 40 54.3 13 62 -67 15 9 32 15 28 7 15 4 24 15 33 16 -0.24 100 0 0 15 53 25 18 40 55.8 14 63 -66 15 44 8 16 2 43 15 39 0 16 7 52 -0.24 101 0 0 16 27 54 18 40 57.5 16 63 -65 16 18 37 16 37 12 16 13 29 16 42 20 -0.23 102 0 0 17 2 15 18 40 59.2 17 63 -64 16 52 58 17 11 32 16 47 51 17 16 41 -0.23 103 0 0 17 36 27 18 41 1.1 18 64 -63 17 27 11 17 45 44 17 22 3 17 50 52 -0.23 104 0 0 18 10 29 18 41 3.0 19 64 -62 18 1 12 18 19 45 17 56 5 18 24 53 -0.23 105 0 0 18 44 19 18 41 5.1 20 64 -61 18 35 3 18 53 35 18 29 56 18 58 43 -0.23 106 0 0 19 17 57 18 41 7.3 21 65 -60 19 8 42 19 27 13 19 3 35 19 32 20 -0.23 107 0 0 19 51 22 18 41 9.5 22 65 -59 19 42 7 20 0 37 19 37 0 20 5 45 -0.23 108 0 0 20 24 33 18 41 11.9 23 65 -58 20 15 19 20 33 48 20 10 12 20 38 55 -0.23 109 0 0 20 57 29 18 41 14.4 24 66 -57 20 48 15 21 6 43 20 43 9 21 11 50 -0.23 110 0 0 21 30 9 18 41 16.9 25 66 -56 21 20 56 21 39 22 21 15 50 21 44 28 -0.23 111 0 0 22 2 32 18 41 19.6 27 67 -55 21 53 20 22 11 45 21 48 14 22 16 51 -0.23 112 0 0 22 34 38 18 41 22.3 28 67 -54 22 25 26 22 43 49 22 20 21 22 48 55 -0.23 113 0 0 23 6 25 18 41 25.2 29 68 -53 22 57 14 23 15 36 22 52 10 23 20 41 -0.23 114 0 0 23 37 53 18 41 28.1 30 68 -52 23 28 43 23 47 3 23 23 39 23 52 8 -0.23 115 0 0 24 9 1 18 41 31.0 31 69 -51 23 59 53 24 18 10 23 54 49 24 23 14 -0.23 116 0 0 24 39 49 18 41 34.1 32 69 -50 24 30 41 24 48 57 24 25 38 24 54 0 -0.23 117 0 0 25 10 15 18 41 37.2 33 70 -49 25 1 9 25 19 22 24 56 6 25 24 25 -0.23 118 0 0 25 40 20 18 41 40.4 34 70 -48 25 31 14 25 49 26 25 26 13 25 54 28 -0.23 119 0 0 26 10 2 18 41 43.7 35 71 -47 26 0 57 26 19 7 25 55 56 26 24 8 -0.23 120 0 0 26 39 21 18 41 47.1 36 71 -46 26 30 17 26 48 24 26 25 17 26 53 25 -0.23 121 0 0 27 8 16 18 41 50.5 37 72 -45 26 59 14 27 17 18 26 54 14 27 22 19 -0.23 122 0 0 27 36 47 18 41 53.9 38 72 -44 27 27 46 27 45 48 27 22 47 27 50 48 -0.23 123 0 0 28 4 54 18 41 57.4 39 73 -43 27 55 54 28 13 54 27 50 56 28 18 53 -0.23 124 0 0 28 32 36 18 42 1.0 40 74 -42 28 23 37 28 41 34 28 18 40 28 46 32 -0.23 125 0 0 28 59 52 18 42 4.6 41 74 -41 28 50 55 29 8 49 28 45 58 29 13 46 -0.23 126 0 0 29 26 42 18 42 8.3 42 75 -40 29 17 47 29 35 38 29 12 50 29 40 35 -0.23 127 0 0 29 53 6 18 42 12.0 43 76 -39 29 44 12 30 2 1 29 39 17 30 6 57 -0.23 128 0 0 30 19 4 18 42 15.7 44 76 -38 30 10 12 30 27 57 30 5 17 30 32 53 -0.23 129 0 0 30 44 36 18 42 19.5 45 77 -37 30 35 44 30 53 27 30 30 50 30 58 22 -0.23 130 0 0 31 9 40 18 42 23.4 46 78 -37 31 0 50 31 18 30 30 55 57 31 23 24 -0.23 131 0 0 31 34 17 18 42 27.2 47 79 -36 31 25 28 31 43 6 31 20 36 31 47 58 -0.23 132 0 0 31 58 26 18 42 31.1 48 79 -35 31 49 39 32 7 14 31 44 48 32 12 6 -0.23 133 0 0 32 22 8 18 42 35.1 48 80 -34 32 13 23 32 30 54 32 8 32 32 35 45 -0.23 134 0 0 32 45 23 18 42 39.0 49 81 -33 32 36 38 32 54 7 32 31 48 32 58 57 -0.23 135 0 0 33 8 9 18 42 43.0 50 82 -32 32 59 26 33 16 52 32 54 37 33 21 41 -0.23 136 0 0 33 30 27 18 42 47.0 51 83 -31 33 21 46 33 39 9 33 16 58 33 43 58 -0.23 137 0 0 33 52 18 18 42 51.0 52 84 -30 33 43 38 34 0 58 33 38 51 34 5 46 -0.23 138 0 0 34 13 40 18 42 55.1 53 84 -29 34 5 2 34 22 19 34 0 15 34 27 6 -0.23 139 0 0 34 34 34 18 42 59.2 54 85 -29 34 25 57 34 43 11 34 21 12 34 47 58 -0.23 140 0 0 34 55 0 18 43 3.2 55 86 -28 34 46 25 35 3 36 34 41 40 35 8 21 -0.23 141 0 0 35 14 58 18 43 7.4 55 87 -27 35 6 24 35 23 32 35 1 40 35 28 17 -0.23 142 0 0 35 34 28 18 43 11.5 56 88 -26 35 25 55 35 43 0 35 21 12 35 47 44 -0.23 143 0 0 35 53 29 18 43 15.6 57 89 -25 35 44 58 36 2 0 35 40 15 36 6 43 -0.23 144 0 0 36 12 2 18 43 19.7 58 91 -24 36 3 33 36 20 32 35 58 51 36 25 14 -0.23 145 0 0 36 30 7 18 43 23.9 59 92 -23 36 21 39 36 38 36 36 16 58 36 43 17 -0.23 146 0 0 36 47 45 18 43 28.1 60 93 -23 36 39 18 36 56 12 36 34 37 37 0 52 -0.23 147 0 0 37 4 54 18 43 32.2 60 94 -22 36 56 28 37 13 19 36 51 49 37 17 59 -0.23 148 0 0 37 21 35 18 43 36.4 61 95 -21 37 13 11 37 29 59 37 8 32 37 34 39 -0.23 149 0 0 37 37 48 18 43 40.6 62 96 -20 37 29 26 37 46 12 37 24 48 37 50 50 -0.22 150 0 0 37 53 34 18 43 44.8 63 98 -19 37 45 13 38 1 56 37 40 35 38 6 34 -0.22 151 0 0 38 8 52 18 43 49.0 63 99 -19 38 0 32 38 17 13 37 55 55 38 21 50 -0.22 152 0 0 38 23 43 18 43 53.1 64 101 -18 38 15 24 38 32 2 38 10 48 38 36 38 -0.22 153 0 0 38 38 6 18 43 57.3 65 102 -17 38 29 48 38 46 24 38 25 13 38 51 0 -0.22 154 0 0 38 52 2 18 44 1.5 66 103 -16 38 43 45 39 0 19 38 39 11 39 4 54 -0.22 155 0 0 39 5 31 18 44 5.7 66 105 -15 38 57 15 39 13 46 38 52 41 39 18 20 -0.22 156 0 0 39 18 32 18 44 9.9 67 107 -15 39 10 18 39 26 47 39 5 45 39 31 20 -0.22 157 0 0 39 31 7 18 44 14.1 68 108 -14 39 22 54 39 39 20 39 18 21 39 43 53 -0.22 158 0 0 39 43 15 18 44 18.3 68 110 -13 39 35 3 39 51 27 39 30 31 39 55 59 -0.22 159 0 0 39 54 56 18 44 22.5 69 112 -12 39 46 45 40 3 7 39 42 13 40 7 39 -0.22 160 0 0 40 6 10 18 44 26.7 70 114 -12 39 58 1 40 14 20 39 53 30 40 18 52 -0.22 161 0 0 40 16 58 18 44 30.9 70 116 -11 40 8 50 40 25 8 40 4 19 40 29 38 -0.22 162 0 0 40 27 20 18 44 35.1 71 118 -10 40 19 12 40 35 28 40 14 43 40 39 59 -0.22 163 0 0 40 37 16 18 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9 20 30 36 20 59 15 -0.25 - 95 0 0 20 12 1 18 50 45.1 14 297 55 20 2 47 20 21 15 19 57 41 20 26 22 -0.25 - 94 0 0 19 38 52 18 50 46.5 13 297 56 19 29 38 19 48 7 19 24 31 19 53 15 -0.26 - 93 0 0 19 5 30 18 50 47.8 11 298 56 18 56 15 19 14 46 18 51 8 19 19 53 -0.26 - 92 0 0 18 31 56 18 50 49.0 10 298 56 18 22 40 18 41 11 18 17 33 18 46 19 -0.26 - 91 0 0 17 58 9 18 50 50.0 9 298 56 17 48 53 18 7 25 17 43 46 18 12 33 -0.26 - 90 0 0 17 24 12 18 50 51.0 8 299 56 17 14 56 17 33 29 17 9 49 17 38 37 -0.27 - 89 0 0 16 50 5 18 50 51.8 7 299 56 16 40 49 16 59 22 16 35 41 17 4 30 -0.28 - 88 0 0 16 15 50 18 50 52.5 6 299 56 16 6 34 16 25 7 16 1 26 16 30 15 -0.28 - 87 0 0 15 41 27 18 50 53.1 5 300 56 15 32 10 15 50 44 15 27 3 15 55 52 -0.30 - 86 0 0 15 6 57 18 50 53.5 4 300 56 14 57 41 15 16 14 14 52 33 15 21 23 -0.32 - 85 0 0 14 32 22 18 50 53.9 3 300 56 14 23 6 14 41 39 14 17 58 14 46 48 -0.35 - 84 0 0 13 57 43 18 50 54.1 1 300 55 13 48 26 14 7 0 13 43 18 14 12 8 -0.45 - 83 0 0 13 23 0 18 50 54.2 0 301 55 13 13 43 13 32 16 13 8 36 13 37 25 -1.35 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 599-045813 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 06 20.6900 DE: +29 47 42.483 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 06 20.6905 DE: +29 47 42.480 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 11.5 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (715) Transvaalia asteroid class: approx. diameter [km]: 29 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.84160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Apr 27 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): 0.011", 0.001", 106.554° remarks: * orbital elements for (715)Transvaalia : Mean anomaly = 115.4104370734 deg Arg. of pericenter = 300.5505004181 deg Long. of node = 46.0359559285 deg Inclination = 13.8182809026 deg Eccentricity = 0.0855906216 Semimajor axis = 2.7673557775 AU Perihelion dist = 2.5304960762 AU Mag: H = 10.10, G = 0.15 Epoch of elements : MJD 60608.78182025 TDT (2024 Oct 25.7818) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr27,1.40,2024,10,25,18.763703,-0.012177,0.215440,11.537981,0.549439,-0.005481,0.001895,0.000000,0.000000 -179.1437,29.6955,-105.46,-12.46,False UCAC4 599-045813,9.10574718,29.7951342,11.93,11.45,11.19,0.0,0,,9.13049354,29.6954552,4.24,4.05,0,0,0 715,Transvaalia,15.67,28.673,2.8416,0,0,2.741,1.70,,1.6,0 0,115.2431,2024,10,25,300.5505,46.0360,13.8183,0.08559,2.76736,2.53050,10.10,5.0,0.15 1.277,0.0110,0.0014,107,0.0039,Known errors,1.52,0,-1,-1 20241025_045813,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org