IOTA/IOTA-ES occultation update for (1397) Umtata / UCAC4 357-198718 event on 2024 Aug 04, 14:35 UT Visible from Summary ------- On 2024 Aug 04 UT, the 20.025 km diameter asteroid (1397) Umtata will occult a 11.8 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 2.05 mag to 13.69 mag (the magnitude of the asteroid) for at most 3.090 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 Aug 04, 14:19 - 2024 Aug 04, 14:52 * geocentric midpoint of event [JD]: 2460527.10816079 * magnitude of target star: 11.82 * magnitude drop [mag]: 2.05 * estimated maximum duration [s]: 3.090 * Moon: 0 % sunlit, 168° distance * Sun: 166° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.011) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.004", 70°) * approx speed of asteroid's shadow [km/s]: 6.4774 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 357-198718 by 1397 Umtata on 2024 Aug 4 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 58 0 0 -17 52 44 14 51 54.4 1 109 -14 -17 46 53 -17 58 36 -17 44 22 -18 1 6 .... 59 0 0 -18 12 23 14 51 54.0 2 109 -15 -18 6 32 -18 18 13 -18 4 2 -18 20 43 -0.08 60 0 0 -18 31 25 14 51 53.3 3 109 -16 -18 25 36 -18 37 14 -18 23 6 -18 39 43 -0.12 61 0 0 -18 49 51 14 51 52.3 4 108 -17 -18 44 3 -18 55 39 -18 41 34 -18 58 8 -0.14 62 0 0 -19 7 42 14 51 51.0 5 108 -18 -19 1 55 -19 13 29 -18 59 26 -19 15 57 -0.16 63 0 0 -19 24 57 14 51 49.4 6 108 -19 -19 19 11 -19 30 43 -19 16 42 -19 33 11 -0.16 64 0 0 -19 41 37 14 51 47.6 7 107 -20 -19 35 52 -19 47 22 -19 33 24 -19 49 50 -0.17 65 0 0 -19 57 42 14 51 45.4 8 107 -21 -19 51 58 -20 3 26 -19 49 30 -20 5 54 -0.17 66 0 0 -20 13 12 14 51 43.0 9 107 -22 -20 7 29 -20 18 56 -20 5 2 -20 21 23 -0.17 67 0 0 -20 28 8 14 51 40.4 10 106 -23 -20 22 26 -20 33 51 -20 19 59 -20 36 17 -0.17 68 0 0 -20 42 30 14 51 37.4 11 106 -24 -20 36 48 -20 48 11 -20 34 22 -20 50 38 -0.18 69 0 0 -20 56 17 14 51 34.3 11 106 -25 -20 50 36 -21 1 58 -20 48 10 -21 4 24 -0.18 70 0 0 -21 9 30 14 51 30.8 12 105 -25 -21 3 50 -21 15 10 -21 1 24 -21 17 36 -0.18 71 0 0 -21 22 10 14 51 27.1 13 105 -26 -21 16 31 -21 27 49 -21 14 5 -21 30 14 -0.18 72 0 0 -21 34 16 14 51 23.2 14 105 -27 -21 28 38 -21 39 54 -21 26 12 -21 42 19 -0.18 73 0 0 -21 45 49 14 51 19.1 15 104 -28 -21 40 11 -21 51 26 -21 37 46 -21 53 51 -0.18 74 0 0 -21 56 48 14 51 14.7 16 104 -29 -21 51 11 -22 2 26 -21 48 47 -22 4 50 -0.18 75 0 0 -22 7 15 14 51 10.0 17 104 -30 -22 1 39 -22 12 52 -21 59 14 -22 15 16 -0.18 76 0 0 -22 17 9 14 51 5.2 18 103 -31 -22 11 33 -22 22 45 -22 9 9 -22 25 9 -0.18 77 0 0 -22 26 31 14 51 0.1 19 103 -32 -22 20 56 -22 32 6 -22 18 32 -22 34 30 -0.18 78 0 0 -22 35 20 14 50 54.8 20 103 -33 -22 29 45 -22 40 55 -22 27 22 -22 43 18 -0.18 79 0 0 -22 43 37 14 50 49.2 21 102 -34 -22 38 3 -22 49 11 -22 35 39 -22 51 35 -0.18 80 0 0 -22 51 22 14 50 43.5 22 102 -35 -22 45 48 -22 56 56 -22 43 25 -22 59 19 -0.18 81 0 0 -22 58 35 14 50 37.5 23 101 -36 -22 53 2 -23 4 9 -22 50 39 -23 6 31 -0.18 82 0 0 -23 5 17 14 50 31.3 23 101 -37 -22 59 44 -23 10 50 -22 57 21 -23 13 12 -0.18 83 0 0 -23 11 27 14 50 25.0 24 101 -37 -23 5 54 -23 16 59 -23 3 31 -23 19 22 -0.18 84 0 0 -23 17 5 14 50 18.4 25 100 -38 -23 11 33 -23 22 37 -23 9 11 -23 25 0 -0.18 85 0 0 -23 22 13 14 50 11.6 26 100 -39 -23 16 41 -23 27 45 -23 14 18 -23 30 7 -0.18 86 0 0 -23 26 49 14 50 4.6 27 100 -40 -23 21 17 -23 32 21 -23 18 55 -23 34 43 -0.18 87 0 0 -23 30 54 14 49 57.4 28 99 -41 -23 25 23 -23 36 26 -23 23 1 -23 38 48 -0.18 88 0 0 -23 34 29 14 49 50.0 29 99 -42 -23 28 58 -23 40 0 -23 26 36 -23 42 22 -0.18 89 0 0 -23 37 33 14 49 42.4 30 99 -43 -23 32 2 -23 43 4 -23 29 40 -23 45 25 -0.18 90 0 0 -23 40 6 14 49 34.6 31 98 -44 -23 34 35 -23 45 37 -23 32 13 -23 47 58 -0.18 91 0 0 -23 42 9 14 49 26.6 31 98 -45 -23 36 38 -23 47 39 -23 34 16 -23 50 1 -0.17 92 0 0 -23 43 41 14 49 18.5 32 98 -45 -23 38 10 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56 43 -21 43 7 -21 59 7 -0.17 117 0 0 -21 40 14 14 44 55.2 54 92 -68 -21 34 38 -21 45 51 -21 32 14 -21 48 15 -0.17 118 0 0 -21 28 52 14 44 42.4 55 92 -68 -21 23 15 -21 34 29 -21 20 51 -21 36 54 -0.17 119 0 0 -21 17 0 14 44 29.4 56 92 -69 -21 11 23 -21 22 38 -21 8 58 -21 25 3 -0.17 120 0 0 -21 4 39 14 44 16.3 57 92 -70 -20 59 1 -21 10 17 -20 56 36 -21 12 42 -0.17 121 0 0 -20 51 48 14 44 2.9 58 92 -71 -20 46 9 -20 57 26 -20 43 43 -20 59 52 -0.17 122 0 0 -20 38 27 14 43 49.5 59 92 -72 -20 32 47 -20 44 6 -20 30 21 -20 46 31 -0.17 123 0 0 -20 24 36 14 43 35.8 59 92 -73 -20 18 56 -20 30 16 -20 16 30 -20 32 42 -0.17 124 0 0 -20 10 15 14 43 22.0 60 93 -74 -20 4 34 -20 15 56 -20 2 8 -20 18 22 -0.17 125 0 0 -19 55 25 14 43 8.0 61 93 -75 -19 49 43 -20 1 6 -19 47 17 -20 3 33 -0.17 126 0 0 -19 40 5 14 42 53.9 62 93 -76 -19 34 23 -19 45 47 -19 31 56 -19 48 14 -0.17 127 0 0 -19 24 15 14 42 39.6 63 93 -77 -19 18 32 -19 29 58 -19 16 5 -19 32 25 -0.17 128 0 0 -19 7 55 14 42 25.1 64 94 -77 -19 2 11 -19 13 39 -18 59 44 -19 16 6 -0.17 129 0 0 -18 51 6 14 42 10.5 65 94 -78 -18 45 21 -18 56 50 -18 42 53 -18 59 18 -0.17 130 0 0 -18 33 46 14 41 55.7 65 94 -79 -18 28 1 -18 39 32 -18 25 33 -18 42 0 -0.17 131 0 0 -18 15 57 14 41 40.8 66 95 -80 -18 10 11 -18 21 43 -18 7 43 -18 24 12 -0.17 132 0 0 -17 57 39 14 41 25.7 67 96 -81 -17 51 52 -18 3 25 -17 49 23 -18 5 54 -0.17 133 0 0 -17 38 50 14 41 10.5 68 96 -82 -17 33 2 -17 44 38 -17 30 33 -17 47 7 -0.17 134 0 0 -17 19 32 14 40 55.1 69 97 -83 -17 13 43 -17 25 20 -17 11 14 -17 27 50 -0.17 135 0 0 -16 59 44 14 40 39.5 70 98 -84 -16 53 54 -17 5 33 -16 51 24 -17 8 3 -0.17 136 0 0 -16 39 27 14 40 23.9 71 99 -85 -16 33 36 -16 45 17 -16 31 6 -16 47 47 -0.17 137 0 0 -16 18 40 14 40 8.0 71 100 -85 -16 12 48 -16 24 31 -16 10 18 -16 27 2 -0.17 138 0 0 -15 57 23 14 39 52.1 72 102 -86 -15 51 31 -16 3 15 -15 49 0 -16 5 46 -0.17 139 0 0 -15 35 37 14 39 35.9 73 103 -87 -15 29 44 -15 41 30 -15 27 13 -15 44 2 -0.17 140 0 0 -15 13 22 14 39 19.7 74 105 -87 -15 7 28 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177 0 0 3 33 49 14 28 31.2 62 218 -52 3 40 18 3 27 21 3 43 5 3 24 35 -0.19 178 0 0 4 10 33 14 28 14.2 61 218 -51 4 17 2 4 4 4 4 19 49 4 1 17 -0.19 179 0 0 4 47 27 14 27 57.4 60 219 -50 4 53 57 4 40 58 4 56 44 4 38 10 -0.19 180 0 0 5 24 31 14 27 40.8 59 220 -48 5 31 1 5 18 1 5 33 49 5 15 13 -0.19 -179 0 0 6 1 43 14 27 24.3 58 220 -47 6 8 14 5 55 12 6 11 1 5 52 25 -0.19 -178 0 0 6 39 2 14 27 8.0 56 221 -46 6 45 34 6 32 31 6 48 22 6 29 43 -0.19 -177 0 0 7 16 29 14 26 51.9 55 221 -45 7 23 1 7 9 57 7 25 49 7 7 9 -0.20 -176 0 0 7 54 0 14 26 36.0 54 222 -44 8 0 33 7 47 28 8 3 21 7 44 40 -0.20 -175 0 0 8 31 36 14 26 20.4 53 222 -43 8 38 9 8 25 4 8 40 58 8 22 15 -0.20 -174 0 0 9 9 16 14 26 4.9 52 223 -42 9 15 49 9 2 43 9 18 38 8 59 54 -0.20 -173 0 0 9 46 58 14 25 49.7 51 223 -41 9 53 31 9 40 24 9 56 20 9 37 36 -0.20 -172 0 0 10 24 41 14 25 34.7 50 224 -40 10 31 14 10 18 7 10 34 3 10 15 18 -0.20 -171 0 0 11 2 24 14 25 19.9 49 224 -38 11 8 58 10 55 50 11 11 47 10 53 1 -0.20 -170 0 0 11 40 6 14 25 5.4 48 225 -37 11 46 41 11 33 32 11 49 30 11 30 43 -0.20 -169 0 0 12 17 47 14 24 51.2 47 225 -36 12 24 21 12 11 12 12 27 10 12 8 23 -0.20 -168 0 0 12 55 24 14 24 37.2 46 226 -35 13 1 58 12 48 49 13 4 48 12 46 0 -0.20 -167 0 0 13 32 57 14 24 23.5 44 226 -34 13 39 31 13 26 22 13 42 21 13 23 33 -0.20 -166 0 0 14 10 25 14 24 10.1 43 226 -33 14 16 59 14 3 50 14 19 49 14 1 1 -0.20 -165 0 0 14 47 46 14 23 57.0 42 227 -32 14 54 21 14 41 12 14 57 10 14 38 22 -0.20 -164 0 0 15 25 0 14 23 44.2 41 227 -31 15 31 35 15 18 26 15 34 24 15 15 36 -0.20 -163 0 0 16 2 5 14 23 31.7 40 228 -30 16 8 40 15 55 31 16 11 29 15 52 42 -0.20 -162 0 0 16 39 1 14 23 19.6 39 228 -29 16 45 36 16 32 27 16 48 25 16 29 38 -0.20 -161 0 0 17 15 47 14 23 7.7 38 228 -27 17 22 21 17 9 13 17 25 10 17 6 24 -0.20 -160 0 0 17 52 20 14 22 56.1 37 229 -26 17 58 54 17 45 46 18 1 43 17 42 57 -0.20 -159 0 0 18 28 41 14 22 44.9 36 229 -25 18 35 15 18 22 7 18 38 3 18 19 19 -0.20 -158 0 0 19 4 48 14 22 34.0 35 230 -24 19 11 21 18 58 15 19 14 10 18 55 26 -0.20 -157 0 0 19 40 41 14 22 23.4 34 230 -23 19 47 14 19 34 8 19 50 2 19 31 19 -0.20 -156 0 0 20 16 17 14 22 13.2 33 230 -22 20 22 50 20 9 45 20 25 38 20 6 57 -0.20 -155 0 0 20 51 38 14 22 3.2 32 231 -21 20 58 10 20 45 6 21 0 58 20 42 18 -0.20 -154 0 0 21 26 41 14 21 53.7 30 231 -20 21 33 12 21 20 9 21 36 0 21 17 21 -0.20 -153 0 0 22 1 25 14 21 44.4 29 232 -19 22 7 56 21 54 54 22 10 44 21 52 7 -0.20 -152 0 0 22 35 50 14 21 35.5 28 232 -18 22 42 21 22 29 20 22 45 8 22 26 33 -0.20 -151 0 0 23 9 55 14 21 27.0 27 232 -17 23 16 25 23 3 26 23 19 12 23 0 39 -0.20 -150 0 0 23 43 39 14 21 18.8 26 233 -16 23 50 9 23 37 11 23 52 56 23 34 24 -0.20 -149 0 0 24 17 2 14 21 10.9 25 233 -15 24 23 30 24 10 34 24 26 17 24 7 47 -0.20 -148 0 0 24 50 2 14 21 3.3 24 234 -14 24 56 30 24 43 35 24 59 16 24 40 49 -0.20 -147 0 0 25 22 39 14 20 56.1 23 234 -13 25 29 6 25 16 13 25 31 52 25 13 27 -0.20 -146 0 0 25 54 53 14 20 49.3 22 235 -12 26 1 19 25 48 27 26 4 4 25 45 42 -0.20 -145 0 0 26 26 42 14 20 42.7 21 235 -11 26 33 7 26 20 17 26 35 52 26 17 32 -0.20 -144 0 0 26 58 6 14 20 36.5 20 236 -10 27 4 30 26 51 42 27 7 15 26 48 57 -0.20 -143 0 0 27 29 4 14 20 30.6 19 236 -9 27 35 27 27 22 41 27 38 12 27 19 57 -0.20 -142 0 0 27 59 36 14 20 25.1 18 237 -8 28 5 59 27 53 14 28 8 43 27 50 30 -0.20 -141 0 0 28 29 42 14 20 19.9 17 237 -7 28 36 3 28 23 21 28 38 47 28 20 37 -0.20 -140 0 0 28 59 20 14 20 14.9 16 238 -6 29 5 41 28 53 0 29 8 24 28 50 17 -0.20 -139 0 0 29 28 31 14 20 10.3 15 238 -5 29 34 51 29 22 12 29 37 33 29 19 29 -0.20 -138 0 0 29 57 14 14 20 6.1 14 238 -4 30 3 33 29 50 56 30 6 15 29 48 14 -0.20 -137 0 0 30 25 29 14 20 2.1 13 239 -3 30 31 46 30 19 12 30 34 28 30 16 30 -0.20 -136 0 0 30 53 15 14 19 58.4 12 240 -2 30 59 31 30 46 59 31 2 12 30 44 18 -0.20 -135 0 0 31 20 32 14 19 55.0 11 240 -1 31 26 47 31 14 17 31 29 28 31 11 36 -0.20 -134 0 0 31 47 20 14 19 51.9 10 241 0 31 53 34 31 41 6 31 56 14 31 38 26 -0.20 -133 0 0 32 13 38 14 19 49.2 9 241 1 32 19 51 32 7 25 32 22 31 32 4 46 -0.20 -132 0 0 32 39 27 14 19 46.6 8 242 2 32 45 38 32 33 15 32 48 18 32 30 36 -0.20 -131 0 0 33 4 45 14 19 44.4 7 242 3 33 10 56 32 58 35 33 13 35 32 55 56 -0.20 -130 0 0 33 29 34 14 19 42.5 7 243 4 33 35 43 33 23 25 33 38 21 33 20 46 -0.19 -129 0 0 33 53 52 14 19 40.8 6 243 5 34 0 0 33 47 44 34 2 38 33 45 6 -0.19 -128 0 0 34 17 40 14 19 39.4 5 244 6 34 23 47 34 11 33 34 26 24 34 8 56 -0.19 -127 0 0 34 40 58 14 19 38.2 4 244 7 34 47 3 34 34 52 34 49 40 34 32 15 -0.19 -126 0 0 35 3 45 14 19 37.3 3 245 8 35 9 49 34 57 40 35 12 26 34 55 4 -0.18 -125 0 0 35 26 1 14 19 36.7 2 245 8 35 32 4 35 19 58 35 34 40 35 17 22 -0.18 -124 0 0 35 47 47 14 19 36.3 1 246 9 35 53 49 35 41 45 35 56 24 35 39 10 -0.16 -123 0 0 36 9 2 14 19 36.1 0 247 10 36 15 3 36 3 1 36 17 38 36 0 27 -0.02 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 357-198718 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 58 31.2271 DE: -18 42 19.217 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 58 31.2272 DE: -18 42 19.217 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1397) Umtata asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.026 distance from Earth [AU]: 1.07840 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): 0.029", 0.004", 69.728° remarks: * orbital elements for (1397)Umtata : Mean anomaly = 20.7804416559 deg Arg. of pericenter = 206.3927008686 deg Long. of node = 77.4201929558 deg Inclination = 3.5093580419 deg Eccentricity = 0.2542132888 Semimajor axis = 2.6816480837 AU Perihelion dist = 1.9999375049 AU Mag: H = 11.44, G = 0.15 Epoch of elements : MJD 60526.60816188 TDT (2024 Aug 04.6082) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,3.09,2024,8,4,14.595859,-0.082280,0.151518,-3.214646,-1.741485,-0.001269,0.000090,0.000001,0.000000 157.3847,-18.5864,-37.42,17.00,False UCAC4 357-198718,21.97534085,-18.7053379,12.35,11.82,11.53,0.0,0,,21.99827965,-18.5863648,2.05,1.91,0,0,0 1397,Umtata,13.69,20.025,1.0784,0,0,-1.844,-14.20,,1.2,0 0,20.6439,2024,8,4,206.3927,77.4202,3.5094,0.25421,2.68165,1.99994,11.43,5.0,0.15 1.214,0.0290,0.0037,70,0.0055,Known errors,0.93,0,-1,-1 20240804_198718,60140.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org