IOTA/IOTA-ES occultation update for (1242) Zambesia / TYC 7373-00341-1 event on 2023 Jul 15, 14:41 UT Visible from Australia Summary ------- On 2023 Jul 15 UT, the 52.5 km diameter asteroid (1242) Zambesia will occult a 10.4 mag star in the constellation Scorpius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.77 mag to 15.18 mag (the magnitude of the asteroid) for at most 5.180 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: 2023 Jul 15, 14:30 - 2023 Jul 15, 14:51 * geocentric midpoint of event [JD]: 2460141.11205454 * magnitude of target star: 10.42 * magnitude drop [mag]: 4.77 * estimated maximum duration [s]: 5.180 * Moon: 5 % sunlit, 168° distance * Sun: 145° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.005", 93°) * approx speed of asteroid's shadow [km/s]: 10.1327 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7373-00341-1 by 1242 Zambesia on 2023 Jul 15 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 39 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 30 18 8 .. .. .. 30 8 40 .... 40 0 0 29 47 22 14 51 29.8 1 135 18 30 8 15 29 26 32 30 17 48 29 17 2 .... 41 0 0 28 55 7 14 51 29.4 2 136 17 29 16 3 28 34 14 29 25 37 28 24 43 -0.13 42 0 0 28 2 12 14 51 28.7 4 136 15 28 23 10 27 41 16 28 32 46 27 31 44 -0.19 43 0 0 27 8 39 14 51 27.7 5 136 14 27 29 40 26 47 41 27 39 16 26 38 8 -0.21 44 0 0 26 14 31 14 51 26.3 6 137 13 26 35 33 25 53 31 26 45 11 25 43 57 -0.23 45 0 0 25 19 49 14 51 24.6 7 137 12 25 40 53 24 58 49 25 50 32 24 49 14 -0.24 46 0 0 24 24 38 14 51 22.6 9 138 11 24 45 43 24 3 36 24 55 21 23 54 1 -0.25 47 0 0 23 28 58 14 51 20.2 10 138 10 23 50 4 23 7 56 23 59 43 22 58 20 -0.25 48 0 0 22 32 54 14 51 17.5 11 139 9 22 53 59 22 11 51 23 3 38 22 2 16 -0.26 49 0 0 21 36 27 14 51 14.5 13 139 7 21 57 32 21 15 25 22 7 11 21 5 49 -0.26 50 0 0 20 39 41 14 51 11.1 14 139 6 21 0 46 20 18 39 21 10 24 20 9 4 -0.26 51 0 0 19 42 38 14 51 7.3 15 140 5 20 3 42 19 21 38 20 13 20 19 12 3 -0.27 52 0 0 18 45 22 14 51 3.2 17 140 4 19 6 25 18 24 23 19 16 2 18 14 49 -0.27 53 0 0 17 47 56 14 50 58.7 18 140 3 18 8 57 17 26 59 18 18 33 17 17 26 -0.27 54 0 0 16 50 23 14 50 53.9 19 141 1 17 11 21 16 29 28 17 20 57 16 19 56 -0.27 55 0 0 15 52 45 14 50 48.7 21 141 0 16 13 41 15 31 53 16 23 15 15 22 22 -0.27 56 0 0 14 55 6 14 50 43.2 22 141 -1 15 15 59 14 34 17 15 25 32 14 24 47 -0.27 57 0 0 13 57 29 14 50 37.4 23 142 -2 14 18 19 13 36 43 14 27 50 13 27 15 -0.28 58 0 0 12 59 57 14 50 31.2 25 142 -4 13 20 43 12 39 14 13 30 12 12 29 48 -0.28 59 0 0 12 2 32 14 50 24.7 26 142 -5 12 23 14 11 41 54 12 32 42 11 32 29 -0.28 60 0 0 11 5 18 14 50 17.9 27 143 -6 11 25 56 10 44 43 11 35 22 10 35 21 -0.28 61 0 0 10 8 17 14 50 10.8 29 143 -7 10 28 50 9 47 47 10 38 14 9 38 26 -0.28 62 0 0 9 11 32 14 50 3.3 30 143 -9 9 32 0 8 51 7 9 41 22 8 41 48 -0.28 63 0 0 8 15 6 14 49 55.6 31 143 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39 19.9 71 232 -73 -26 58 53 -27 29 0 -26 52 0 -27 35 52 -0.26 125 0 0 -27 25 55 14 39 10.5 71 234 -74 -27 10 53 -27 40 56 -27 4 1 -27 47 46 -0.26 126 0 0 -27 37 14 14 39 1.1 70 235 -74 -27 22 15 -27 52 13 -27 15 23 -27 59 2 -0.26 127 0 0 -27 47 55 14 38 51.8 70 236 -75 -27 32 57 -28 2 51 -27 26 7 -28 9 40 -0.26 128 0 0 -27 57 57 14 38 42.6 69 238 -76 -27 43 1 -28 12 51 -27 36 12 -28 19 39 -0.26 129 0 0 -28 7 20 14 38 33.5 68 239 -76 -27 52 27 -28 22 13 -27 45 38 -28 29 0 -0.26 130 0 0 -28 16 6 14 38 24.4 68 240 -77 -28 1 14 -28 30 57 -27 54 26 -28 37 44 -0.26 131 0 0 -28 24 14 14 38 15.4 67 240 -78 -28 9 24 -28 39 4 -28 2 37 -28 45 49 -0.26 132 0 0 -28 31 44 14 38 6.5 66 241 -78 -28 16 55 -28 46 32 -28 10 9 -28 53 18 -0.26 133 0 0 -28 38 37 14 37 57.6 66 242 -79 -28 23 50 -28 53 24 -28 17 4 -29 0 8 -0.26 134 0 0 -28 44 53 14 37 48.8 65 242 -80 -28 30 6 -28 59 38 -28 23 21 -29 6 22 -0.26 135 0 0 -28 50 31 14 37 40.1 64 243 -80 -28 35 46 -29 5 15 -28 29 1 -29 11 59 -0.26 136 0 0 -28 55 32 14 37 31.5 63 243 -81 -28 40 48 -29 10 16 -28 34 3 -29 16 59 -0.26 137 0 0 -28 59 56 14 37 22.9 63 244 -81 -28 45 13 -29 14 39 -28 38 29 -29 21 22 -0.26 138 0 0 -29 3 44 14 37 14.3 62 244 -81 -28 49 1 -29 18 25 -28 42 17 -29 25 8 -0.26 139 0 0 -29 6 54 14 37 5.9 61 245 -82 -28 52 12 -29 21 35 -28 45 28 -29 28 17 -0.26 140 0 0 -29 9 28 14 36 57.5 61 245 -82 -28 54 46 -29 24 8 -28 48 3 -29 30 50 -0.26 141 0 0 -29 11 24 14 36 49.2 60 245 -82 -28 56 43 -29 26 5 -28 50 0 -29 32 47 -0.26 142 0 0 -29 12 45 14 36 40.9 59 245 -82 -28 58 3 -29 27 25 -28 51 21 -29 34 7 -0.26 143 0 0 -29 13 28 14 36 32.7 58 245 -82 -28 58 47 -29 28 8 -28 52 4 -29 34 50 -0.26 144 0 0 -29 13 35 14 36 24.6 58 245 -82 -28 58 54 -29 28 15 -28 52 11 -29 34 57 -0.26 145 0 0 -29 13 5 14 36 16.6 57 245 -82 -28 58 23 -29 27 45 -28 51 41 -29 34 27 -0.26 146 0 0 -29 11 58 14 36 8.6 56 246 -82 -28 57 16 -29 26 39 -28 50 33 -29 33 20 -0.26 147 0 0 -29 10 14 14 36 0.6 55 246 -81 -28 55 32 -29 24 55 -28 48 49 -29 31 37 -0.26 148 0 0 -29 7 53 14 35 52.8 54 245 -81 -28 53 11 -29 22 35 -28 46 28 -29 29 17 -0.26 149 0 0 -29 4 56 14 35 45.0 54 245 -80 -28 50 13 -29 19 38 -28 43 29 -29 26 21 -0.26 150 0 0 -29 1 21 14 35 37.3 53 245 -80 -28 46 37 -29 16 4 -28 39 53 -29 22 47 -0.27 151 0 0 -28 57 9 14 35 29.6 52 245 -79 -28 42 24 -29 11 53 -28 35 39 -29 18 36 -0.27 152 0 0 -28 52 19 14 35 22.0 51 245 -79 -28 37 33 -29 7 4 -28 30 48 -29 13 48 -0.27 153 0 0 -28 46 52 14 35 14.5 50 245 -78 -28 32 5 -29 1 38 -28 25 19 -29 8 22 -0.27 154 0 0 -28 40 47 14 35 7.0 50 245 -77 -28 25 59 -28 55 34 -28 19 13 -29 2 19 -0.27 155 0 0 -28 34 4 14 34 59.6 49 245 -77 -28 19 14 -28 48 53 -28 12 28 -28 55 38 -0.27 156 0 0 -28 26 43 14 34 52.3 48 245 -76 -28 11 52 -28 41 33 -28 5 4 -28 48 19 -0.27 157 0 0 -28 18 43 14 34 45.0 47 244 -75 -28 3 50 -28 33 35 -27 57 2 -28 40 22 -0.27 158 0 0 -28 10 5 14 34 37.9 46 244 -75 -27 55 10 -28 24 59 -27 48 21 -28 31 47 -0.27 159 0 0 -28 0 48 14 34 30.8 45 244 -74 -27 45 51 -28 15 44 -27 39 1 -28 22 32 -0.27 160 0 0 -27 50 52 14 34 23.7 45 244 -73 -27 35 53 -28 5 49 -27 29 2 -28 12 39 -0.27 161 0 0 -27 40 16 14 34 16.8 44 244 -72 -27 25 15 -27 55 16 -27 18 23 -28 2 6 -0.27 162 0 0 -27 29 0 14 34 9.9 43 243 -72 -27 13 57 -27 44 2 -27 7 4 -27 50 54 -0.27 163 0 0 -27 17 4 14 34 3.1 42 243 -71 -27 1 58 -27 32 9 -26 55 4 -27 39 2 -0.27 164 0 0 -27 4 28 14 33 56.4 41 243 -70 -26 49 19 -27 19 35 -26 42 24 -27 26 29 -0.27 165 0 0 -26 51 11 14 33 49.7 40 243 -69 -26 35 59 -27 6 21 -26 29 3 -27 13 16 -0.27 166 0 0 -26 37 12 14 33 43.1 39 242 -68 -26 21 58 -26 52 25 -26 15 0 -26 59 22 -0.27 167 0 0 -26 22 32 14 33 36.7 39 242 -68 -26 7 15 -26 37 48 -26 0 16 -26 44 46 -0.27 168 0 0 -26 7 10 14 33 30.3 38 242 -67 -25 51 50 -26 22 29 -25 44 49 -26 29 28 -0.27 169 0 0 -25 51 5 14 33 24.0 37 241 -66 -25 35 42 -26 6 27 -25 28 39 -26 13 28 -0.27 170 0 0 -25 34 17 14 33 17.8 36 241 -65 -25 18 50 -25 49 43 -25 11 47 -25 56 45 -0.27 171 0 0 -25 16 46 14 33 11.6 35 241 -64 -25 1 16 -25 32 16 -24 54 10 -25 39 19 -0.27 172 0 0 -24 58 31 14 33 5.6 34 241 -63 -24 42 57 -25 14 4 -24 35 50 -25 21 10 -0.27 173 0 0 -24 39 32 14 32 59.7 33 240 -62 -24 23 54 -24 55 9 -24 16 45 -25 2 16 -0.27 174 0 0 -24 19 48 14 32 53.9 32 240 -62 -24 4 6 -24 35 29 -23 56 55 -24 42 38 -0.27 175 0 0 -23 59 18 14 32 48.2 31 240 -61 -23 43 32 -24 15 3 -23 36 20 -24 22 14 -0.28 176 0 0 -23 38 3 14 32 42.6 30 239 -60 -23 22 13 -23 53 52 -23 14 58 -24 1 5 -0.28 177 0 0 -23 16 1 14 32 37.1 29 239 -59 -23 0 6 -23 31 55 -22 52 50 -23 39 10 -0.28 178 0 0 -22 53 13 14 32 31.7 28 239 -58 -22 37 13 -23 9 11 -22 29 55 -23 16 28 -0.28 179 0 0 -22 29 37 14 32 26.5 27 238 -57 -22 13 32 -22 45 39 -22 6 12 -22 52 59 -0.28 180 0 0 -22 5 12 14 32 21.4 26 238 -56 -21 49 3 -22 21 20 -21 41 40 -22 28 42 -0.28 -179 0 0 -21 40 0 14 32 16.4 25 238 -55 -21 23 46 -21 56 12 -21 16 20 -22 3 36 -0.28 -178 0 0 -21 13 58 14 32 11.5 24 238 -54 -20 57 39 -21 30 16 -20 50 11 -21 37 42 -0.28 -177 0 0 -20 47 6 14 32 6.8 23 237 -53 -20 30 42 -21 3 30 -20 23 12 -21 10 58 -0.28 -176 0 0 -20 19 25 14 32 2.3 22 237 -52 -20 2 55 -20 35 53 -19 55 22 -20 43 24 -0.28 -175 0 0 -19 50 52 14 31 57.9 21 237 -51 -19 34 17 -20 7 26 -19 26 41 -20 15 0 -0.28 -174 0 0 -19 21 28 14 31 53.6 20 236 -50 -19 4 47 -19 38 8 -18 57 9 -19 45 44 -0.28 -173 0 0 -18 51 13 14 31 49.5 19 236 -49 -18 34 25 -19 7 58 -18 26 45 -19 15 37 -0.28 -172 0 0 -18 20 4 14 31 45.6 18 236 -48 -18 3 11 -18 36 56 -17 55 28 -18 44 38 -0.28 -171 0 0 -17 48 4 14 31 41.9 17 236 -47 -17 31 4 -18 5 1 -17 23 18 -18 12 46 -0.28 -170 0 0 -17 15 9 14 31 38.4 16 235 -46 -16 58 3 -17 32 13 -16 50 14 -17 40 0 -0.28 -169 0 0 -16 41 21 14 31 35.0 15 235 -45 -16 24 9 -16 58 31 -16 16 17 -17 6 21 -0.28 -168 0 0 -16 6 38 14 31 31.9 14 235 -44 -15 49 19 -16 23 55 -15 41 25 -16 31 48 -0.29 -167 0 0 -15 31 1 14 31 28.9 13 234 -43 -15 13 35 -15 48 25 -15 5 37 -15 56 21 -0.29 -166 0 0 -14 54 28 14 31 26.2 12 234 -42 -14 36 56 -15 11 59 -14 28 55 -15 19 58 -0.29 -165 0 0 -14 17 0 14 31 23.7 11 234 -41 -13 59 21 -14 34 38 -13 51 17 -14 42 40 -0.29 -164 0 0 -13 38 37 14 31 21.4 9 234 -40 -13 20 50 -13 56 21 -13 12 43 -14 4 27 -0.29 -163 0 0 -12 59 17 14 31 19.4 8 234 -39 -12 41 23 -13 17 9 -12 33 12 -13 25 17 -0.29 -162 0 0 -12 19 1 14 31 17.6 7 233 -37 -12 1 0 -12 37 0 -11 52 46 -12 45 12 -0.29 -161 0 0 -11 37 48 14 31 16.1 6 233 -36 -11 19 40 -11 55 55 -11 11 22 -12 4 10 -0.29 -160 0 0 -10 55 39 14 31 14.9 5 233 -35 -10 37 23 -11 13 53 -10 29 2 -11 22 12 -0.29 -159 0 0 -10 12 34 14 31 13.9 3 233 -34 - 9 54 10 -10 30 55 - 9 45 45 -10 39 17 -0.29 -158 0 0 - 9 28 32 14 31 13.2 2 233 -33 - 9 10 0 - 9 47 1 - 9 1 32 - 9 55 26 -0.29 -157 0 0 - 8 43 33 14 31 12.8 1 232 -32 - 8 24 54 - 9 2 10 - 8 16 23 - 9 10 39 -0.30 Uncertainty in time = +/- 2 secs Prediction of 2023 May 14.2 Data for the target star ------------------------ * name: TYC 7373-00341-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 12 37.8020 DE: -37 12 37.558 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 12 37.8019 DE: -37 12 37.558 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1242) Zambesia asteroid class: approx. diameter [km]: 53 approx. diameter ["]: 0.034 distance from Earth [AU]: 2.14230 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.016", 0.005", 92.644° remarks: * orbital elements for (1242)Zambesia : Mean anomaly = 244.2986175932 deg Arg. of pericenter = 54.1418940509 deg Long. of node = 349.7224299011 deg Inclination = 10.1423280854 deg Eccentricity = 0.1907200486 Semimajor axis = 2.7352356501 AU Perihelion dist = 2.2135713739 AU Mag: H = 10.39, G = 0.15 Epoch of elements : MJD 60140.61201389 TDT (2023 Jul 15.6120) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,5.18,2023,7,15,14.689309,0.106496,0.229824,-5.189515,2.403737,0.003084,0.000919,0.000001,0.000000 105.0260,-37.2399,-38.83,21.50,False TYC 7373-00341-1,17.21050056,-37.2104327,0.00,10.42,0.00,0.0,0,,17.23730347,-37.2398513,4.78,0.00,0,0,0 1242,Zambesia,15.18,52.5,2.1423,0,0,-1.782,9.87,,2.6,0 0,244.1653,2023,7,15,54.1419,349.7224,10.1423,0.19072,2.73524,2.21357,10.43,5.0,0.15 1.228,0.0157,0.0053,93,0.0077,Known errors,-1.00,-1,-1,-1 20230715_0341-1,60078.17 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 14, 04:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org