IOTA/IOTA-ES occultation update for (54) Alexandra / TYC 6889-01241-1 event on 2023 Aug 27, 05:31 UT Visible from W Canada, W USA, South America Summary ------- On 2023 Aug 27 UT, the 152.1 km diameter asteroid (54) Alexandra will occult a 10.8 mag star in the constellation Sagittarius for observers along a path across W Canada, W USA, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.90 mag to 11.09 mag (the magnitude of the asteroid) for at most 31.040 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: 98 * date and approx. time of event: 2023 Aug 27, 05:11 - 2023 Aug 27, 05:51 * geocentric midpoint of event [JD]: 2460183.73004734 * magnitude of target star: 10.81 * magnitude drop [mag]: 0.90 * estimated maximum duration [s]: 31.040 * Moon: 79 % sunlit, 14° distance * Sun: 139° distance * rough path description: W Canada, W USA, South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 168 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.055, +/- 0.028) * 1 sigma uncertainty ellipse (major, minor, PA): (0.059", 0.019", 69°) * approx speed of asteroid's shadow [km/s]: 4.9001 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6889-01241-1 by 54 Alexandra on 2023 Aug 27 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 ' " Longitude Longitude Longitude Longitude -123 50 29 67 0 0 5 50 48.9 0 184 -9 -121 52 2 -125 47 54 -120 23 23 -127 14 26 .... -123 59 55 66 0 0 5 50 48.5 1 184 -9 -122 6 9 -125 52 44 -120 41 3 -127 15 54 0.30 -124 7 20 65 0 0 5 50 47.7 2 184 -10 -122 17 51 -125 55 57 -120 55 59 -127 16 2 0.39 -124 12 58 64 0 0 5 50 46.5 3 184 -11 -122 27 24 -125 57 43 -121 8 30 -127 14 59 0.43 -124 16 59 63 0 0 5 50 44.8 4 184 -12 -122 35 1 -125 58 11 -121 18 51 -127 12 51 0.45 -124 19 32 62 0 0 5 50 42.7 5 184 -12 -122 40 54 -125 57 28 -121 27 14 -127 9 43 0.46 -124 20 46 61 0 0 5 50 40.2 6 184 -13 -122 45 13 -125 55 40 -121 33 51 -127 5 41 0.47 -124 20 47 60 0 0 5 50 37.2 7 184 -14 -122 48 5 -125 52 52 -121 38 52 -127 0 49 0.48 -124 19 41 59 0 0 5 50 33.8 8 184 -15 -122 49 38 -125 49 9 -121 42 25 -126 55 10 -0.49 -124 17 33 58 0 0 5 50 29.9 9 184 -16 -122 49 58 -125 44 35 -121 44 37 -126 48 49 -0.49 -124 14 28 57 0 0 5 50 25.6 10 184 -16 -122 49 12 -125 39 13 -121 45 34 -126 41 47 -0.50 -124 10 30 56 0 0 5 50 20.9 11 184 -17 -122 47 23 -125 33 7 -121 45 21 -126 34 7 -0.50 -124 5 42 55 0 0 5 50 15.8 12 184 -18 -122 44 35 -125 26 20 -121 44 5 -126 25 52 -0.50 -124 0 7 54 0 0 5 50 10.2 13 184 -19 -122 40 54 -125 18 53 -121 41 48 -126 17 3 -0.51 -123 53 49 53 0 0 5 50 4.2 14 184 -20 -122 36 21 -125 10 49 -121 38 35 -126 7 41 -0.51 -123 46 48 52 0 0 5 49 57.8 15 184 -20 -122 31 1 -125 2 10 -121 34 30 -125 57 49 -0.51 -123 39 8 51 0 0 5 49 51.0 16 184 -21 -122 24 55 -124 52 57 -121 29 34 -125 47 27 -0.51 -123 30 51 50 0 0 5 49 43.7 17 184 -22 -122 18 6 -124 43 11 -121 23 51 -125 36 38 -0.52 -123 21 57 49 0 0 5 49 36.0 18 184 -23 -122 10 35 -124 32 55 -121 17 23 -125 25 20 -0.52 -123 12 29 48 0 0 5 49 27.9 19 185 -24 -122 2 26 -124 22 9 -121 10 12 -125 13 37 -0.52 -123 2 28 47 0 0 5 49 19.4 20 185 -25 -121 53 39 -124 10 54 -121 2 21 -125 1 28 -0.52 -122 51 55 46 0 0 5 49 10.5 21 185 -25 -121 44 16 -123 59 12 -120 53 50 -124 48 54 -0.52 -122 40 51 45 0 0 5 49 1.2 22 185 -26 -121 34 18 -123 47 2 -120 44 42 -124 35 55 -0.52 -122 29 17 44 0 0 5 48 51.4 23 185 -27 -121 23 47 -123 34 26 -120 34 57 -124 22 33 -0.52 -122 17 14 43 0 0 5 48 41.3 24 186 -28 -121 12 43 -123 21 24 -120 24 38 -124 8 48 -0.53 -122 4 42 42 0 0 5 48 30.7 25 186 -29 -121 1 8 -123 7 57 -120 13 44 -123 54 40 -0.53 -121 51 43 41 0 0 5 48 19.8 26 186 -30 -120 49 2 -122 54 5 -120 2 18 -123 40 9 -0.53 -121 38 17 40 0 0 5 48 8.5 27 186 -30 -120 36 26 -122 39 49 -119 50 19 -123 25 16 -0.53 -121 24 24 39 0 0 5 47 56.7 28 186 -31 -120 23 21 -122 25 9 -119 37 50 -123 10 2 -0.53 -121 10 5 38 0 0 5 47 44.6 29 187 -32 -120 9 47 -122 10 6 -119 24 49 -122 54 25 -0.53 -120 55 21 37 0 0 5 47 32.1 30 187 -33 -119 55 44 -121 54 39 -119 11 19 -122 38 27 -0.53 -120 40 11 36 0 0 5 47 19.2 31 187 -34 -119 41 15 -121 38 49 -118 57 19 -122 22 7 -0.53 -120 24 36 35 0 0 5 47 5.9 32 188 -35 -119 26 18 -121 22 36 -118 42 50 -122 5 26 -0.53 -120 8 36 34 0 0 5 46 52.3 33 188 -35 -119 10 53 -121 6 0 -118 27 53 -121 48 24 -0.53 -119 52 11 33 0 0 5 46 38.2 34 188 -36 -118 55 2 -120 49 1 -118 12 27 -121 31 1 -0.53 -119 35 22 32 0 0 5 46 23.8 35 189 -37 -118 38 45 -120 31 40 -117 56 34 -121 13 16 -0.53 -119 18 8 31 0 0 5 46 9.1 36 189 -38 -118 22 1 -120 13 56 -117 40 12 -120 55 10 -0.53 -119 0 30 30 0 0 5 45 54.0 37 189 -39 -118 4 52 -119 55 50 -117 23 23 -120 36 43 -0.53 -118 42 27 29 0 0 5 45 38.5 38 190 -40 -117 47 16 -119 37 21 -117 6 7 -120 17 54 -0.53 -118 24 0 28 0 0 5 45 22.7 39 190 -41 -117 29 14 -119 18 29 -116 48 24 -119 58 43 -0.53 -118 5 9 27 0 0 5 45 6.5 40 191 -42 -117 10 46 -118 59 14 -116 30 13 -119 39 11 -0.53 -117 45 53 26 0 0 5 44 49.9 41 191 -42 -116 51 51 -118 39 36 -116 11 35 -119 19 17 -0.53 -117 26 12 25 0 0 5 44 33.1 42 191 -43 -116 32 31 -118 19 35 -115 52 30 -118 59 1 -0.53 -117 6 7 24 0 0 5 44 15.9 43 192 -44 -116 12 44 -117 59 11 -115 32 57 -118 38 23 -0.53 -116 45 36 23 0 0 5 43 58.3 43 192 -45 -115 52 31 -117 38 23 -115 12 57 -118 17 22 -0.52 -116 24 41 22 0 0 5 43 40.4 44 193 -46 -115 31 52 -117 17 11 -114 52 30 -117 55 58 -0.52 -116 3 19 21 0 0 5 43 22.2 45 194 -47 -115 10 45 -116 55 36 -114 31 34 -117 34 11 -0.52 -115 41 33 20 0 0 5 43 3.7 46 194 -48 -114 49 12 -116 33 35 -114 10 10 -117 12 1 -0.52 -115 19 20 19 0 0 5 42 44.9 47 195 -48 -114 27 11 -116 11 10 -113 48 18 -116 49 27 -0.52 -114 56 40 18 0 0 5 42 25.7 48 196 -49 -114 4 43 -115 48 20 -113 25 58 -116 26 29 -0.52 -114 33 34 17 0 0 5 42 6.3 49 196 -50 -113 41 46 -115 25 4 -113 3 8 -116 3 6 -0.52 -114 10 1 16 0 0 5 41 46.5 50 197 -51 -113 18 21 -115 1 22 -112 39 49 -115 39 17 -0.52 -113 46 0 15 0 0 5 41 26.5 51 198 -52 -112 54 27 -114 37 14 -112 16 0 -115 15 4 -0.52 -113 21 30 14 0 0 5 41 6.2 51 199 -53 -112 30 3 -114 12 39 -111 51 40 -114 50 24 -0.51 -112 56 32 13 0 0 5 40 45.5 52 200 -54 -112 5 9 -113 47 36 -111 26 50 -114 25 18 -0.51 -112 31 5 12 0 0 5 40 24.6 53 200 -55 -111 39 45 -113 22 5 -111 1 28 -113 59 44 -0.51 -112 5 8 11 0 0 5 40 3.4 54 201 -55 -111 13 50 -112 56 6 -110 35 34 -113 33 42 -0.51 -111 38 39 10 0 0 5 39 42.0 55 202 -56 -110 47 22 -112 29 36 -110 9 7 -113 7 12 -0.51 -111 11 40 9 0 0 5 39 20.2 55 204 -57 -110 20 22 -112 2 37 -109 42 6 -112 40 13 -0.51 -110 44 8 8 0 0 5 38 58.3 56 205 -58 -109 52 49 -111 35 7 -109 14 31 -112 12 43 -0.50 -110 16 4 7 0 0 5 38 36.0 57 206 -59 -109 24 41 -111 7 5 -108 46 21 -111 44 43 -0.50 -109 47 25 6 0 0 5 38 13.5 58 207 -60 -108 55 59 -110 38 30 -108 17 35 -111 16 11 -0.50 -109 18 11 5 0 0 5 37 50.7 58 208 -61 -108 26 39 -110 9 22 -107 48 11 -110 47 6 -0.50 -108 48 22 4 0 0 5 37 27.8 59 210 -61 -107 56 43 -109 39 39 -107 18 10 -110 17 28 -0.50 -108 17 56 3 0 0 5 37 4.5 60 211 -62 -107 26 9 -109 9 20 -106 47 28 -109 47 15 -0.50 -107 46 51 2 0 0 5 36 41.0 60 213 -63 -106 54 54 -108 38 25 -106 16 7 -109 16 26 -0.49 -107 15 7 1 0 0 5 36 17.3 61 215 -64 -106 22 59 -108 6 52 -105 44 3 -108 45 0 -0.49 -106 42 43 0 0 0 5 35 53.4 61 216 -65 -105 50 22 -107 34 39 -105 11 16 -108 12 56 -0.49 -106 9 36 - 1 0 0 5 35 29.3 62 218 -66 -105 17 1 -107 1 46 -104 37 44 -107 40 12 -0.49 Latitude Latitude Latitude Latitude -106 0 0 - 1 17 8 5 35 22.3 62 219 -66 0 17 35 - 2 49 20 1 29 41 - 3 56 15 -0.49 -105 0 0 - 3 1 59 5 34 39.5 63 222 -67 - 1 30 6 - 4 31 34 - 0 20 18 - 5 36 41 -0.48 -104 0 0 - 4 42 52 5 33 57.7 64 225 -69 - 3 13 37 - 6 10 2 - 2 5 55 - 7 13 29 -0.48 -103 0 0 - 6 19 58 5 33 17.0 64 229 -70 - 4 53 9 - 7 44 54 - 3 47 24 - 8 46 47 -0.48 -102 0 0 - 7 53 29 5 32 37.2 64 232 -71 - 6 28 54 - 9 16 19 - 5 24 56 -10 16 45 -0.48 -101 0 0 - 9 23 33 5 31 58.5 65 236 -72 - 8 1 4 -10 44 26 - 6 58 45 -11 43 30 -0.47 -100 0 0 -10 50 19 5 31 20.8 65 239 -73 - 9 29 47 -12 9 22 - 8 29 1 -13 7 9 -0.47 - 99 0 0 -12 13 55 5 30 44.2 65 242 -73 -10 55 13 -13 31 15 - 9 55 53 -14 27 49 -0.47 - 98 0 0 -13 34 29 5 30 8.5 64 245 -74 -12 17 30 -14 50 12 -11 19 30 -15 45 37 -0.47 - 97 0 0 -14 52 7 5 29 33.8 64 248 -75 -13 36 46 -16 6 19 -12 40 2 -17 0 38 -0.47 - 96 0 0 -16 6 58 5 29 0.1 64 251 -75 -14 53 8 -17 19 42 -13 57 35 -18 13 0 -0.46 - 95 0 0 -17 19 6 5 28 27.4 63 254 -75 -16 6 42 -18 30 28 -15 12 17 -19 22 47 -0.46 - 94 0 0 -18 28 38 5 27 55.6 63 256 -75 -17 17 36 -19 38 42 -16 24 15 -20 30 5 -0.46 - 93 0 0 -19 35 40 5 27 24.7 62 258 -75 -18 25 56 -20 44 29 -17 33 34 -21 35 0 -0.46 - 92 0 0 -20 40 17 5 26 54.8 62 260 -75 -19 31 47 -21 47 55 -18 40 22 -22 37 35 -0.46 - 91 0 0 -21 42 34 5 26 25.7 61 262 -75 -20 35 14 -22 49 5 -19 44 43 -23 37 56 -0.46 - 90 0 0 -22 42 36 5 25 57.4 60 264 -75 -21 36 23 -23 48 3 -20 46 44 -24 36 8 -0.46 - 89 0 0 -23 40 28 5 25 30.0 60 265 -74 -22 35 19 -24 44 54 -21 46 29 -25 32 14 -0.45 - 88 0 0 -24 36 15 5 25 3.4 59 266 -74 -23 32 6 -25 39 41 -22 44 3 -26 26 20 -0.45 - 87 0 0 -25 30 0 5 24 37.6 58 268 -74 -24 26 50 -26 32 30 -23 39 31 -27 18 28 -0.45 - 86 0 0 -26 21 48 5 24 12.6 57 269 -73 -25 19 33 -27 23 25 -24 32 57 -28 8 44 -0.45 - 85 0 0 -27 11 43 5 23 48.3 57 269 -72 -26 10 21 -28 12 28 -25 24 25 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30 49 -36 35 39 -0.45 - 72 0 0 -35 34 4 5 19 29.7 46 273 -64 -34 41 20 -36 26 25 -34 1 56 -37 5 0 -0.45 - 71 0 0 -36 3 4 5 19 13.6 45 273 -63 -35 10 49 -36 54 56 -34 31 47 -37 33 11 -0.45 - 70 0 0 -36 30 53 5 18 57.9 45 273 -62 -35 39 6 -37 22 18 -35 0 25 -38 0 13 -0.45 - 69 0 0 -36 57 33 5 18 42.6 44 273 -62 -36 6 12 -37 48 32 -35 27 51 -38 26 7 -0.45 - 68 0 0 -37 23 5 5 18 27.7 43 273 -61 -36 32 10 -38 13 39 -35 54 9 -38 50 56 -0.45 - 67 0 0 -37 47 32 5 18 13.3 42 273 -60 -36 57 1 -38 37 42 -36 19 18 -39 14 42 -0.45 - 66 0 0 -38 10 55 5 17 59.2 42 272 -60 -37 20 47 -39 0 42 -36 43 22 -39 37 26 -0.45 - 65 0 0 -38 33 16 5 17 45.5 41 272 -59 -37 43 30 -39 22 41 -37 6 21 -39 59 9 -0.45 - 64 0 0 -38 54 35 5 17 32.2 40 272 -58 -38 5 11 -39 43 40 -37 28 18 -40 19 53 -0.45 - 63 0 0 -39 14 56 5 17 19.2 39 271 -58 -38 25 51 -40 3 41 -37 49 13 -40 39 39 -0.45 - 62 0 0 -39 34 18 5 17 6.5 39 271 -57 -38 45 32 -40 22 44 -38 9 8 -40 58 28 -0.46 - 61 0 0 -39 52 43 5 16 54.2 38 271 -56 -39 4 15 -40 40 52 -38 28 5 -41 16 23 -0.46 - 60 0 0 -40 10 12 5 16 42.3 37 270 -56 -39 22 2 -40 58 4 -38 46 5 -41 33 23 -0.46 - 59 0 0 -40 26 47 5 16 30.6 36 270 -55 -39 38 53 -41 14 23 -39 3 8 -41 49 31 -0.46 - 58 0 0 -40 42 29 5 16 19.2 36 269 -54 -39 54 49 -41 29 50 -39 19 16 -42 4 46 -0.46 - 57 0 0 -40 57 17 5 16 8.1 35 269 -54 -40 9 52 -41 44 24 -39 34 30 -42 19 10 -0.46 - 56 0 0 -41 11 15 5 15 57.3 34 269 -53 -40 24 3 -41 58 8 -39 48 50 -42 32 44 -0.46 - 55 0 0 -41 24 21 5 15 46.8 34 268 -53 -40 37 22 -42 11 2 -40 2 19 -42 45 29 -0.46 - 54 0 0 -41 36 37 5 15 36.6 33 268 -52 -40 49 50 -42 23 7 -40 14 56 -42 57 26 -0.46 - 53 0 0 -41 48 5 5 15 26.6 32 267 -51 -41 1 28 -42 34 24 -40 26 42 -43 8 34 -0.46 - 52 0 0 -41 58 43 5 15 16.8 31 267 -51 -41 12 17 -42 44 52 -40 37 38 -43 18 56 -0.46 - 51 0 0 -42 8 34 5 15 7.3 31 266 -50 -41 22 17 -42 54 34 -40 47 45 -43 28 31 -0.46 - 50 0 0 -42 17 38 5 14 58.1 30 266 -49 -41 31 29 -43 3 29 -40 57 3 -43 37 20 -0.47 - 49 0 0 -42 25 54 5 14 49.1 29 265 -49 -41 39 53 -43 11 38 -41 5 33 -43 45 24 -0.47 - 48 0 0 -42 33 24 5 14 40.3 29 265 -48 -41 47 30 -43 19 2 -41 13 15 -43 52 42 -0.47 - 47 0 0 -42 40 9 5 14 31.7 28 264 -48 -41 54 20 -43 25 41 -41 20 10 -43 59 16 -0.47 - 46 0 0 -42 46 8 5 14 23.4 27 263 -47 -42 0 24 -43 31 34 -41 26 17 -44 5 6 -0.47 - 45 0 0 -42 51 21 5 14 15.3 26 263 -46 -42 5 42 -43 36 43 -41 31 38 -44 10 12 -0.47 - 44 0 0 -42 55 50 5 14 7.4 26 262 -46 -42 10 14 -43 41 8 -41 36 13 -44 14 35 -0.47 - 43 0 0 -42 59 33 5 13 59.7 25 262 -45 -42 14 1 -43 44 49 -41 40 2 -44 18 14 -0.47 - 42 0 0 -43 2 33 5 13 52.2 24 261 -45 -42 17 2 -43 47 46 -41 43 4 -44 21 9 -0.47 - 41 0 0 -43 4 47 5 13 44.9 24 261 -44 -42 19 17 -43 50 0 -41 45 21 -44 23 22 -0.48 - 40 0 0 -43 6 17 5 13 37.8 23 260 -43 -42 20 48 -43 51 29 -41 46 51 -44 24 51 -0.48 - 39 0 0 -43 7 3 5 13 30.9 22 259 -43 -42 21 33 -43 52 15 -41 47 36 -44 25 37 -0.48 - 38 0 0 -43 7 4 5 13 24.2 22 259 -42 -42 21 32 -43 52 17 -41 47 35 -44 25 40 -0.48 - 37 0 0 -43 6 20 5 13 17.7 21 258 -42 -42 20 47 -43 51 36 -41 46 47 -44 25 0 -0.48 - 36 0 0 -43 4 51 5 13 11.4 20 257 -41 -42 19 15 -43 50 10 -41 45 14 -44 23 36 -0.48 - 35 0 0 -43 2 38 5 13 5.3 20 257 -40 -42 16 58 -43 48 0 -41 42 53 -44 21 28 -0.48 - 34 0 0 -42 59 39 5 12 59.4 19 256 -40 -42 13 54 -43 45 5 -41 39 46 -44 18 37 -0.49 - 33 0 0 -42 55 54 5 12 53.7 18 256 -39 -42 10 4 -43 41 26 -41 35 52 -44 15 2 -0.49 - 32 0 0 -42 51 23 5 12 48.1 17 255 -39 -42 5 27 -43 37 1 -41 31 10 -44 10 41 -0.49 - 31 0 0 -42 46 6 5 12 42.8 17 254 -38 -42 0 3 -43 31 51 -41 25 40 -44 5 36 -0.49 - 30 0 0 -42 40 2 5 12 37.6 16 254 -37 -41 53 50 -43 25 55 -41 19 22 -43 59 46 -0.49 - 29 0 0 -42 33 10 5 12 32.7 15 253 -37 -41 46 50 -43 19 12 -41 12 14 -43 53 9 -0.49 - 28 0 0 -42 25 30 5 12 27.9 15 252 -36 -41 38 59 -43 11 41 -41 4 16 -43 45 46 -0.49 - 27 0 0 -42 17 1 5 12 23.3 14 252 -35 -41 30 19 -43 3 23 -40 55 28 -43 37 35 -0.50 - 26 0 0 -42 7 42 5 12 19.0 13 251 -35 -41 20 49 -42 54 16 -40 45 48 -43 28 36 -0.50 - 25 0 0 -41 57 32 5 12 14.8 12 251 -34 -41 10 26 -42 44 19 -40 35 16 -43 18 48 -0.50 - 24 0 0 -41 46 31 5 12 10.9 12 250 -34 -40 59 11 -42 33 31 -40 23 50 -43 8 11 -0.50 - 23 0 0 -41 34 38 5 12 7.2 11 249 -33 -40 47 2 -42 21 52 -40 11 29 -42 56 43 -0.50 - 22 0 0 -41 21 50 5 12 3.6 10 249 -32 -40 33 58 -42 9 21 -39 58 13 -42 44 22 -0.51 - 21 0 0 -41 8 8 5 12 0.4 9 248 -32 -40 19 58 -41 55 55 -39 44 0 -42 31 9 -0.51 - 20 0 0 -40 53 29 5 11 57.3 8 247 -31 -40 5 1 -41 41 35 -39 28 48 -42 17 2 -0.51 - 19 0 0 -40 37 53 5 11 54.5 8 247 -30 -39 49 4 -41 26 18 -39 12 37 -42 1 59 -0.52 - 18 0 0 -40 21 17 5 11 51.9 7 246 -30 -39 32 8 -41 10 3 -38 55 24 -41 45 59 -0.52 - 17 0 0 -40 3 41 5 11 49.6 6 245 -29 -39 14 9 -40 52 49 -38 37 8 -41 29 1 -0.52 - 16 0 0 -39 45 2 5 11 47.5 5 245 -28 -38 55 6 -40 34 33 -38 17 46 -41 11 2 -0.53 - 15 0 0 -39 25 18 5 11 45.7 4 244 -28 -38 34 57 -40 15 15 -37 57 18 -40 52 2 -0.53 - 14 0 0 -39 4 28 5 11 44.2 4 244 -27 -38 13 40 -39 54 51 -37 35 40 -40 31 57 -0.54 - 13 0 0 -38 42 30 5 11 43.0 3 243 -26 -37 51 12 -39 33 20 -37 12 51 -40 10 47 -0.56 - 12 0 0 -38 19 20 5 11 42.1 2 242 -25 -37 27 32 -39 10 40 -36 48 48 -39 48 28 -0.58 - 11 0 0 -37 54 57 5 11 41.5 1 242 -25 -37 2 37 -38 46 49 -36 23 27 -39 24 59 -0.66 - 10 0 0 -37 29 18 5 11 41.3 0 241 -24 .. .. .. -38 21 43 .. .. .. -39 0 17 -3.36 Uncertainty in time = +/- 12 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: TYC 6889-01241-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 37 12.6252 DE: -22 41 16.741 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 37 12.6251 DE: -22 41 16.742 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (54) Alexandra asteroid class: approx. diameter [km]: 152 approx. diameter ["]: 0.159 distance from Earth [AU]: 1.31950 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#194 date of fit: 2023 Jul 30 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): 0.059", 0.019", 68.595° remarks: * orbital elements for (54)Alexandra : Mean anomaly = 7.5348079896 deg Arg. of pericenter = 345.2941949826 deg Long. of node = 313.2297825752 deg Inclination = 11.7969173384 deg Eccentricity = 0.1967142441 Semimajor axis = 2.7106433282 AU Perihelion dist = 2.1774211748 AU Mag: H = 8.00, G = 0.15 Epoch of elements : MJD 60183.22993056 TDT (2023 Aug 27.2299) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1942023Jul30,31.04,2023,8,27,5.521136,0.391234,0.171251,-1.109397,2.533493,0.003439,0.000660,0.000001,0.000000 -123.3589,-22.6352,97.61,10.14,False TYC 6889-01241-1,19.62017369,-22.6879837,0.00,10.81,0.00,0.0,0,,19.64390168,-22.6352196,0.90,0.00,0,0,0 54,Alexandra,11.09,152.100,1.3195,0,0,-0.532,16.88,,7.6,0 0,7.4840,2023,8,27,345.2942,313.2298,11.7969,0.19671,2.71064,2.17742,7.87,5.0,0.15 1.371,0.0590,0.0193,69,0.0621,Known errors,-1.00,0,-1,-1 20230827_1241-1,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org