IOTA/IOTA-ES occultation update for (5) Astraea / UCAC4-533-025154 event on 2023 Dec 30, 12:13 UT Visible from Australia Summary ------- On 2023 Dec 30 UT, the 108 km diameter asteroid (5) Astraea will occult a 12.5 mag star in the constellation Orion 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 0.07 mag to 9.46 mag (the magnitude of the asteroid) for at most 11.960 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: 100 * date and approx. time of event: 2023 Dec 30, 12:04 - 2023 Dec 30, 12:22 * geocentric midpoint of event [JD]: 2460309.00940350 * magnitude of target star: 12.46 * magnitude drop [mag]: 0.07 * estimated maximum duration [s]: 11.960 * Moon: 89 % sunlit, 44° distance * Sun: 172° distance * rough path description: Australia Additional comments ------------------- very low mag drop The occultation path -------------------- * approximate projected width [km]: 152 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 89°) * approx speed of asteroid's shadow [km/s]: 9.0316 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-533-025154 by 5 Astraea on 2023 Dec 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 92 0 0 -32 15 25 12 21 52.4 0 70 7 -31 31 21 .. .. .. -31 29 31 .. .. .. .... 93 0 0 -31 57 25 12 21 52.3 1 70 6 -31 13 28 -32 41 58 -31 11 38 -32 43 51 0.34 94 0 0 -31 39 45 12 21 51.9 2 69 5 -30 55 54 -32 24 11 -30 54 5 -32 26 4 0.68 95 0 0 -31 22 25 12 21 51.3 3 69 4 -30 38 41 -32 6 45 -30 36 52 -32 8 37 0.79 96 0 0 -31 5 26 12 21 50.5 4 68 3 -30 21 49 -31 49 39 -30 19 59 -31 51 31 0.85 97 0 0 -30 48 48 12 21 49.4 5 68 2 -30 5 17 -31 32 55 -30 3 28 -31 34 46 0.88 98 0 0 -30 32 31 12 21 48.0 5 67 1 -29 49 6 -31 16 31 -29 47 18 -31 18 23 0.90 99 0 0 -30 16 36 12 21 46.4 6 67 0 -29 33 17 -31 0 30 -29 31 29 -31 2 21 0.92 100 0 0 -30 1 3 12 21 44.6 7 66 0 -29 17 50 -30 44 50 -29 16 2 -30 46 41 0.93 101 0 0 -29 45 52 12 21 42.6 8 66 -1 -29 2 45 -30 29 33 -29 0 57 -30 31 24 0.94 102 0 0 -29 31 3 12 21 40.3 9 65 -2 -28 48 2 -30 14 38 -28 46 14 -30 16 29 0.95 103 0 0 -29 16 37 12 21 37.7 10 65 -3 -28 33 42 -30 0 6 -28 31 54 -30 1 57 0.95 104 0 0 -29 2 34 12 21 35.0 11 64 -4 -28 19 44 -29 45 58 -28 17 57 -29 47 48 0.96 105 0 0 -28 48 54 12 21 32.0 12 64 -5 -28 6 10 -29 32 12 -28 4 23 -29 34 2 0.96 106 0 0 -28 35 38 12 21 28.7 12 63 -6 -27 52 59 -29 18 50 -27 51 12 -29 20 40 0.97 107 0 0 -28 22 45 12 21 25.3 13 63 -7 -27 40 12 -29 5 52 -27 38 25 -29 7 42 0.97 108 0 0 -28 10 17 12 21 21.6 14 62 -7 -27 27 48 -28 53 18 -27 26 2 -28 55 7 0.97 109 0 0 -27 58 12 12 21 17.7 15 62 -8 -27 15 48 -28 41 8 -27 14 2 -28 42 57 0.97 110 0 0 -27 46 31 12 21 13.6 16 61 -9 -27 4 12 -28 29 22 -27 2 26 -28 31 11 0.98 111 0 0 -27 35 15 12 21 9.2 17 61 -10 -26 53 0 -28 18 1 -26 51 15 -28 19 49 0.98 112 0 0 -27 24 23 12 21 4.6 18 60 -11 -26 42 13 -28 7 4 -26 40 27 -28 8 53 0.98 113 0 0 -27 13 55 12 20 59.9 18 60 -12 -26 31 50 -27 56 32 -26 30 4 -27 58 20 0.98 114 0 0 -27 3 52 12 20 54.9 19 59 -12 -26 21 51 -27 46 25 -26 20 6 -27 48 13 0.98 115 0 0 -26 54 15 12 20 49.7 20 58 -13 -26 12 18 -27 36 43 -26 10 33 -27 38 31 0.98 116 0 0 -26 45 2 12 20 44.3 21 58 -14 -26 3 9 -27 27 26 -26 1 24 -27 29 14 0.98 117 0 0 -26 36 14 12 20 38.7 22 57 -15 -25 54 25 -27 18 34 -25 52 40 -27 20 22 0.98 118 0 0 -26 27 51 12 20 32.9 23 57 -16 -25 46 6 -27 10 8 -25 44 21 -27 11 55 0.98 119 0 0 -26 19 54 12 20 26.9 23 56 -16 -25 38 12 -27 2 7 -25 36 28 -27 3 54 0.98 120 0 0 -26 12 22 12 20 20.7 24 56 -17 -25 30 43 -26 54 31 -25 28 59 -26 56 18 0.98 121 0 0 -26 5 15 12 20 14.3 25 55 -18 -25 23 39 -26 47 21 -25 21 55 -26 49 8 0.99 122 0 0 -25 58 34 12 20 7.7 26 54 -19 -25 17 1 -26 40 37 -25 15 17 -26 42 24 0.99 123 0 0 -25 52 18 12 20 1.0 26 54 -19 -25 10 48 -26 34 18 -25 9 4 -26 36 5 0.99 124 0 0 -25 46 27 12 19 54.1 27 53 -20 -25 5 0 -26 28 25 -25 3 17 -26 30 11 0.99 125 0 0 -25 41 3 12 19 47.0 28 52 -21 -24 59 38 -26 22 58 -24 57 54 -26 24 44 0.99 126 0 0 -25 36 3 12 19 39.7 29 52 -22 -24 54 41 -26 17 56 -24 52 57 -26 19 42 0.99 127 0 0 -25 31 30 12 19 32.3 29 51 -22 -24 50 10 -26 13 20 -24 48 26 -26 15 6 0.99 128 0 0 -25 27 22 12 19 24.7 30 50 -23 -24 46 3 -26 9 10 -24 44 20 -26 10 56 0.99 129 0 0 -25 23 39 12 19 16.9 31 50 -24 -24 42 23 -26 5 25 -24 40 39 -26 7 11 0.99 130 0 0 -25 20 22 12 19 9.0 32 49 -24 -24 39 8 -26 2 7 -24 37 24 -26 3 53 0.99 131 0 0 -25 17 31 12 19 1.0 32 48 -25 -24 36 18 -25 59 14 -24 34 35 -26 1 0 0.99 132 0 0 -25 15 5 12 18 52.8 33 47 -26 -24 33 54 -25 56 47 -24 32 10 -25 58 33 0.99 133 0 0 -25 13 5 12 18 44.4 34 47 -26 -24 31 55 -25 54 46 -24 30 11 -25 56 32 0.99 134 0 0 -25 11 31 12 18 35.9 34 46 -27 -24 30 21 -25 53 10 -24 28 38 -25 54 56 0.99 135 0 0 -25 10 22 12 18 27.3 35 45 -28 -24 29 13 -25 52 1 -24 27 30 -25 53 46 0.99 136 0 0 -25 9 38 12 18 18.6 36 44 -28 -24 28 30 -25 51 16 -24 26 47 -25 53 2 0.99 137 0 0 -25 9 21 12 18 9.7 36 43 -29 -24 28 13 -25 50 58 -24 26 30 -25 52 44 0.99 138 0 0 -25 9 28 12 18 0.7 37 42 -29 -24 28 20 -25 51 5 -24 26 38 -25 52 51 0.99 139 0 0 -25 10 1 12 17 51.5 37 41 -30 -24 28 54 -25 51 38 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32 53 0.99 152 0 0 -25 55 15 12 15 44.0 43 28 -36 -25 13 54 -26 37 6 -25 12 11 -26 38 53 0.99 153 0 0 -26 1 37 12 15 33.7 43 27 -36 -25 20 14 -26 43 31 -25 18 30 -26 45 17 0.99 154 0 0 -26 8 23 12 15 23.3 44 26 -36 -25 26 58 -26 50 19 -25 25 14 -26 52 5 0.99 155 0 0 -26 15 34 12 15 12.8 44 24 -36 -25 34 6 -26 57 32 -25 32 22 -26 59 18 0.99 156 0 0 -26 23 8 12 15 2.3 44 23 -37 -25 41 37 -27 5 9 -25 39 53 -27 6 55 0.99 157 0 0 -26 31 6 12 14 51.8 44 22 -37 -25 49 32 -27 13 10 -25 47 48 -27 14 56 0.99 158 0 0 -26 39 27 12 14 41.2 45 21 -37 -25 57 51 -27 21 34 -25 56 7 -27 23 21 0.99 159 0 0 -26 48 12 12 14 30.7 45 19 -37 -26 6 33 -27 30 23 -26 4 49 -27 32 10 0.99 160 0 0 -26 57 21 12 14 20.0 45 18 -37 -26 15 38 -27 39 35 -26 13 54 -27 41 22 0.99 161 0 0 -27 6 53 12 14 9.4 45 17 -37 -26 25 7 -27 49 10 -26 23 22 -27 50 57 1.00 162 0 0 -27 16 48 12 13 58.7 45 15 -38 -26 34 58 -27 59 9 -26 33 13 -28 0 56 1.00 163 0 0 -27 27 5 12 13 48.1 45 14 -38 -26 45 12 -28 9 30 -26 43 27 -28 11 18 1.00 164 0 0 -27 37 46 12 13 37.4 45 13 -38 -26 55 49 -28 20 15 -26 54 4 -28 22 3 1.00 165 0 0 -27 48 49 12 13 26.7 45 11 -38 -27 6 48 -28 31 22 -27 5 3 -28 33 10 1.00 166 0 0 -28 0 15 12 13 16.1 45 10 -38 -27 18 10 -28 42 52 -27 16 24 -28 44 40 1.00 167 0 0 -28 12 2 12 13 5.4 45 9 -38 -27 29 53 -28 54 44 -27 28 7 -28 56 32 1.00 168 0 0 -28 24 12 12 12 54.7 45 8 -38 -27 41 58 -29 6 58 -27 40 13 -29 8 46 1.00 169 0 0 -28 36 43 12 12 44.1 45 6 -38 -27 54 25 -29 19 34 -27 52 39 -29 21 23 1.00 170 0 0 -28 49 36 12 12 33.5 45 5 -38 -28 7 13 -29 32 32 -28 5 27 -29 34 21 1.00 171 0 0 -29 2 50 12 12 22.9 45 4 -38 -28 20 23 -29 45 51 -28 18 37 -29 47 40 1.00 172 0 0 -29 16 26 12 12 12.4 44 2 -37 -28 33 53 -29 59 31 -28 32 7 -30 1 20 1.00 173 0 0 -29 30 22 12 12 1.9 44 1 -37 -28 47 45 -30 13 32 -28 45 58 -30 15 22 1.00 174 0 0 -29 44 39 12 11 51.4 44 360 -37 -29 1 56 -30 27 54 -29 0 9 -30 29 44 1.00 175 0 0 -29 59 16 12 11 41.0 44 358 -37 -29 16 28 -30 42 37 -29 14 41 -30 44 27 1.00 176 0 0 -30 14 13 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37 46 12 9 32.3 38 343 -33 -32 53 43 -34 22 25 -32 51 53 -34 24 18 1.01 -171 0 0 -33 56 34 12 9 23.1 38 342 -32 -33 12 25 -34 41 19 -33 10 34 -34 43 13 1.01 -170 0 0 -34 15 36 12 9 14.0 37 341 -32 -33 31 22 -35 0 28 -33 29 31 -35 2 22 1.01 -169 0 0 -34 34 54 12 9 5.0 37 340 -31 -33 50 33 -35 19 53 -33 48 42 -35 21 47 1.01 -168 0 0 -34 54 26 12 8 56.2 36 339 -31 -34 9 59 -35 39 31 -34 8 7 -35 41 25 1.01 -167 0 0 -35 14 12 12 8 47.4 36 338 -30 -34 29 38 -35 59 23 -34 27 47 -36 1 18 1.01 -166 0 0 -35 34 10 12 8 38.9 35 337 -30 -34 49 31 -36 19 28 -34 47 39 -36 21 23 1.02 -165 0 0 -35 54 22 12 8 30.4 34 336 -29 -35 9 36 -36 39 47 -35 7 44 -36 41 42 1.02 -164 0 0 -36 14 46 12 8 22.2 34 335 -28 -35 29 54 -37 0 17 -35 28 2 -37 2 13 1.02 -163 0 0 -36 35 22 12 8 14.0 33 334 -28 -35 50 24 -37 21 0 -35 48 31 -37 22 55 1.02 -162 0 0 -36 56 9 12 8 6.1 32 333 -27 -36 11 5 -37 41 53 -36 9 12 -37 43 49 1.02 -161 0 0 -37 17 7 12 7 58.2 32 332 -27 -36 31 57 -38 2 58 -36 30 4 -38 4 54 1.02 -160 0 0 -37 38 16 12 7 50.6 31 332 -26 -36 52 59 -38 24 12 -36 51 6 -38 26 9 1.02 -159 0 0 -37 59 34 12 7 43.1 30 331 -25 -37 14 11 -38 45 37 -37 12 18 -38 47 34 1.02 -158 0 0 -38 21 1 12 7 35.7 30 330 -25 -37 35 33 -39 7 10 -37 33 39 -39 9 7 1.02 -157 0 0 -38 42 37 12 7 28.6 29 329 -24 -37 57 3 -39 28 52 -37 55 9 -39 30 49 1.02 -156 0 0 -39 4 21 12 7 21.6 28 328 -24 -38 18 41 -39 50 42 -38 16 47 -39 52 40 1.02 -155 0 0 -39 26 12 12 7 14.8 28 327 -23 -38 40 27 -40 12 39 -38 38 32 -40 14 37 1.02 -154 0 0 -39 48 11 12 7 8.2 27 326 -22 -39 2 19 -40 34 43 -39 0 25 -40 36 42 1.02 -153 0 0 -40 10 15 12 7 1.7 26 325 -22 -39 24 19 -40 56 54 -39 22 24 -40 58 52 1.02 -152 0 0 -40 32 26 12 6 55.4 25 325 -21 -39 46 24 -41 19 10 -39 44 29 -41 21 8 1.02 -151 0 0 -40 54 41 12 6 49.4 25 324 -20 -40 8 34 -41 41 30 -40 6 39 -41 43 29 1.03 -150 0 0 -41 17 1 12 6 43.5 24 323 -20 -40 30 49 -42 3 56 -40 28 53 -42 5 55 1.03 -149 0 0 -41 39 25 12 6 37.7 23 322 -19 -40 53 8 -42 26 25 -40 51 12 -42 28 24 1.03 -148 0 0 -42 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31 45 12 5 41.0 13 312 -10 -45 44 42 -47 19 32 -45 42 44 -47 21 33 1.03 -135 0 0 -46 53 57 12 5 38.0 13 311 -9 -46 6 53 -47 41 47 -46 4 55 -47 43 48 1.04 -134 0 0 -47 16 5 12 5 35.2 12 311 -8 -46 28 59 -48 3 56 -46 27 1 -48 5 57 1.04 -133 0 0 -47 38 7 12 5 32.5 11 310 -7 -46 50 59 -48 25 59 -46 49 1 -48 28 0 1.04 -132 0 0 -48 0 2 12 5 30.1 10 309 -7 -47 12 53 -48 47 55 -47 10 55 -48 49 57 1.04 -131 0 0 -48 21 50 12 5 27.8 10 308 -6 -47 34 40 -49 9 44 -47 32 42 -49 11 46 1.04 -130 0 0 -48 43 30 12 5 25.7 9 308 -5 -47 56 20 -49 31 25 -47 54 22 -49 33 27 1.04 -129 0 0 -49 5 2 12 5 23.8 8 307 -4 -48 17 52 -49 52 57 -48 15 54 -49 54 59 1.04 -128 0 0 -49 26 26 12 5 22.0 7 306 -4 -48 39 16 -50 14 21 -48 37 18 -50 16 23 1.04 -127 0 0 -49 47 40 12 5 20.5 7 305 -3 -49 0 31 -50 35 35 -48 58 33 -50 37 37 1.05 -126 0 0 -50 8 45 12 5 19.1 6 305 -2 -49 21 36 -50 56 39 -49 19 38 -50 58 41 1.05 -125 0 0 -50 29 40 12 5 17.9 5 304 -2 -49 42 32 -51 17 33 -49 40 34 -51 19 35 1.05 -124 0 0 -50 50 24 12 5 16.8 5 303 -1 -50 3 17 -51 38 16 -50 1 19 -51 40 18 1.06 -123 0 0 -51 10 57 12 5 15.9 4 302 0 -50 23 51 -51 58 48 -50 21 54 -52 0 49 1.06 -122 0 0 -51 31 19 12 5 15.2 3 302 1 -50 44 15 -52 19 7 -50 42 17 -52 21 9 1.07 -121 0 0 -51 51 29 12 5 14.6 2 301 1 -51 4 26 -52 39 15 -51 2 29 -52 41 16 1.09 -120 0 0 -52 11 26 12 5 14.2 2 300 2 -51 24 26 -52 59 10 -51 22 28 -53 1 12 1.11 -119 0 0 -52 31 11 12 5 13.9 1 299 3 -51 44 13 -53 18 52 -51 42 16 -53 20 54 1.17 -118 0 0 -52 50 43 12 5 13.8 0 298 3 -52 3 48 .. .. .. -52 1 50 .. .. .. 1.45 0 0 0 .. .. .... .. .. .. .. .. .. -52 23 9 .. .. .. -52 21 12 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Nov 13.9 Data for the target star ------------------------ * name: UCAC4-533-025154 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 20 25.2136 DE: +16 28 56.735 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 20 25.2136 DE: +16 28 56.735 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5) Astraea asteroid class: approx. diameter [km]: 108 approx. diameter ["]: 0.123 distance from Earth [AU]: 1.21380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 date of fit: 2023 Oct 12 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): 0.009", 0.002", 88.91° remarks: * orbital elements for (5)Astraea : Mean anomaly = 329.1922796045 deg Arg. of pericenter = 359.2112820740 deg Long. of node = 141.4617762188 deg Inclination = 5.3589698563 deg Eccentricity = 0.1873074474 Semimajor axis = 2.5761525728 AU Perihelion dist = 2.0936200103 AU Mag: H = 7.00, G = 0.15 Epoch of elements : MJD 60308.50909722 TDT (2023 Dec 30.5091) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Oct12,11.96,2023,12,30,12.225684,-0.137468,-0.691469,-4.999860,0.993998,0.000327,0.000660,0.000001,0.000000 173.3890,16.4721,-2.79,-23.16,False UCAC4-533-025154,6.34033711,16.4824265,0.00,12.46,0.00,0.0,0,,6.36375732,16.4721400,0.07,0.00,0,0,0 5,Astraea,9.46,108.000,1.2138,0,0,-2.518,7.21,,5.6,0 0,329.0709,2023,12,30,359.2113,141.4618,5.3590,0.18731,2.57615,2.09362,7.00,5.0,0.15 1.021,0.0087,0.0018,89,0.0089,Known errors,-1.00,0,-1,-1 20231230_025154,60261.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Nov 13, 21:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org