IOTA/IOTA-ES occultation update for (25748) 2000 AP243 / UCAC4 340-129452 event on 2024 Oct 28, 18:16 UT Visible from Summary ------- On 2024 Oct 28 UT, the 14.6847121419809 km diameter asteroid (25748) 2000 AP243 will occult a 11.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.20 mag to 19.07 mag (the magnitude of the asteroid) for at most 0.470 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: 2024 Oct 28, 18:13 - 2024 Oct 28, 18:19 * geocentric midpoint of event [JD]: 2460612.26150771 * magnitude of target star: 11.87 * magnitude drop [mag]: 7.20 * estimated maximum duration [s]: 0.470 * Moon: 12 % sunlit, 99° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 97°) * approx speed of asteroid's shadow [km/s]: 31.9615 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 340-129452 by 25748 2000 AP243 on 2024 Oct 28 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 -116 0 0 23 16 7 18 13 29.1 1 114 49 23 11 20 23 20 53 23 8 7 23 24 7 .... -115 0 0 22 51 8 18 13 29.1 2 115 50 22 46 22 22 55 54 22 43 8 22 59 8 -0.18 -114 0 0 22 26 5 18 13 29.3 3 115 51 22 21 19 22 30 51 22 18 5 22 34 5 -0.26 -113 0 0 22 0 59 18 13 29.5 4 116 51 21 56 13 22 5 45 21 52 59 22 8 59 -0.30 -112 0 0 21 35 50 18 13 29.8 5 116 52 21 31 4 21 40 36 21 27 51 21 43 50 -0.32 -111 0 0 21 10 39 18 13 30.1 6 116 53 21 5 53 21 15 25 21 2 40 21 18 39 -0.33 -110 0 0 20 45 27 18 13 30.5 7 117 54 20 40 41 20 50 13 20 37 28 20 53 26 -0.34 -109 0 0 20 20 14 18 13 31.0 8 117 54 20 15 28 20 25 0 20 12 15 20 28 13 -0.35 -108 0 0 19 55 1 18 13 31.6 9 117 55 19 50 15 19 59 47 19 47 2 20 3 0 -0.35 -107 0 0 19 29 48 18 13 32.2 10 118 56 19 25 3 19 34 34 19 21 50 19 37 47 -0.36 -106 0 0 19 4 37 18 13 32.9 11 118 56 18 59 51 19 9 23 18 56 39 19 12 36 -0.36 -105 0 0 18 39 27 18 13 33.6 12 118 57 18 34 42 18 44 13 18 31 29 18 47 26 -0.36 -104 0 0 18 14 21 18 13 34.5 13 119 58 18 9 35 18 19 6 18 6 23 18 22 19 -0.36 -103 0 0 17 49 17 18 13 35.4 14 119 58 17 44 32 17 54 2 17 41 20 17 57 15 -0.37 -102 0 0 17 24 17 18 13 36.4 15 119 59 17 19 32 17 29 2 17 16 20 17 32 14 -0.37 -101 0 0 16 59 22 18 13 37.4 16 120 59 16 54 37 17 4 6 16 51 25 17 7 19 -0.37 -100 0 0 16 34 32 18 13 38.5 17 120 60 16 29 47 16 39 16 16 26 35 16 42 28 -0.37 - 99 0 0 16 9 47 18 13 39.7 18 120 60 16 5 3 16 14 31 16 1 52 16 17 43 -0.37 - 98 0 0 15 45 10 18 13 41.0 19 121 61 15 40 26 15 49 53 15 37 14 15 53 5 -0.37 - 97 0 0 15 20 39 18 13 42.3 20 121 61 15 15 56 15 25 22 15 12 44 15 28 34 -0.38 - 96 0 0 14 56 16 18 13 43.7 21 121 62 14 51 33 15 0 59 14 48 22 15 4 11 -0.38 - 95 0 0 14 32 2 18 13 45.2 22 122 62 14 27 19 14 36 45 14 24 8 14 39 56 -0.38 - 94 0 0 14 7 56 18 13 46.7 23 122 62 14 3 14 14 12 39 14 0 3 14 15 50 -0.38 - 93 0 0 13 44 0 18 13 48.3 24 122 63 13 39 18 13 48 43 13 36 8 13 51 53 -0.38 - 92 0 0 13 20 15 18 13 49.9 25 123 63 13 15 33 13 24 57 13 12 23 13 28 7 -0.38 - 91 0 0 12 56 40 18 13 51.7 26 123 63 12 51 59 13 1 22 12 48 49 13 4 32 -0.38 - 90 0 0 12 33 17 18 13 53.5 27 123 63 12 28 36 12 37 58 12 25 26 12 41 8 -0.38 - 89 0 0 12 10 6 18 13 55.3 29 124 63 12 5 25 12 14 47 12 2 16 12 17 56 -0.38 - 88 0 0 11 47 7 18 13 57.3 30 124 63 11 42 27 11 51 48 11 39 18 11 54 57 -0.38 - 87 0 0 11 24 22 18 13 59.2 31 124 63 11 19 42 11 29 2 11 16 33 11 32 11 -0.38 - 86 0 0 11 1 50 18 14 1.3 32 125 63 10 57 11 11 6 30 10 54 2 11 9 39 -0.38 - 85 0 0 10 39 33 18 14 3.4 33 125 63 10 34 54 10 44 12 10 31 46 10 47 21 -0.38 - 84 0 0 10 17 31 18 14 5.6 34 125 63 10 12 52 10 22 9 10 9 44 10 25 18 -0.38 - 83 0 0 9 55 44 18 14 7.8 35 126 63 9 51 5 10 0 22 9 47 57 10 3 30 -0.39 - 82 0 0 9 34 12 18 14 10.1 36 126 62 9 29 35 9 38 50 9 26 27 9 41 58 -0.39 - 81 0 0 9 12 57 18 14 12.4 37 127 62 9 8 20 9 17 35 9 5 13 9 20 43 -0.39 - 80 0 0 8 51 59 18 14 14.8 38 127 62 8 47 22 8 56 36 8 44 15 8 59 44 -0.39 - 79 0 0 8 31 18 18 14 17.2 39 127 61 8 26 42 8 35 55 8 23 35 8 39 2 -0.39 - 78 0 0 8 10 55 18 14 19.7 40 128 61 8 6 19 8 15 32 8 3 13 8 18 38 -0.39 - 77 0 0 7 50 50 18 14 22.3 41 128 60 7 46 15 7 55 26 7 43 9 7 58 33 -0.39 - 76 0 0 7 31 4 18 14 24.9 42 129 60 7 26 29 7 35 39 7 23 23 7 38 46 -0.39 - 75 0 0 7 11 37 18 14 27.5 43 129 59 7 7 2 7 16 12 7 3 56 7 19 18 -0.39 - 74 0 0 6 52 29 18 14 30.2 44 130 59 6 47 55 6 57 4 6 44 49 7 0 9 -0.39 - 73 0 0 6 33 41 18 14 33.0 45 130 58 6 29 7 6 38 15 6 26 2 6 41 20 -0.39 - 72 0 0 6 15 13 18 14 35.8 46 131 58 6 10 40 6 19 47 6 7 35 6 22 52 -0.39 - 71 0 0 5 57 6 18 14 38.6 47 131 57 5 52 33 6 1 39 5 49 28 6 4 44 -0.39 - 70 0 0 5 39 19 18 14 41.5 47 132 56 5 34 47 5 43 52 5 31 43 5 46 56 -0.39 - 69 0 0 5 21 54 18 14 44.4 48 132 56 5 17 22 5 26 26 5 14 18 5 29 31 -0.39 - 68 0 0 5 4 51 18 14 47.4 49 133 55 5 0 19 5 9 22 4 57 15 5 12 26 -0.39 - 67 0 0 4 48 9 18 14 50.4 50 134 54 4 43 37 4 52 40 4 40 34 4 55 44 -0.39 - 66 0 0 4 31 49 18 14 53.4 51 134 54 4 27 18 4 36 20 4 24 15 4 39 23 -0.39 - 65 0 0 4 15 52 18 14 56.5 52 135 53 4 11 21 4 20 23 4 8 19 4 23 25 -0.39 - 64 0 0 4 0 17 18 14 59.6 53 136 52 3 55 47 4 4 48 3 52 45 4 7 50 -0.39 - 63 0 0 3 45 6 18 15 2.7 54 137 51 3 40 36 3 49 36 3 37 34 3 52 38 -0.39 - 62 0 0 3 30 18 18 15 5.9 55 138 51 3 25 49 3 34 47 3 22 47 3 37 49 -0.39 - 61 0 0 3 15 53 18 15 9.1 56 139 50 3 11 24 3 20 22 3 8 23 3 23 24 -0.39 - 60 0 0 3 1 52 18 15 12.3 56 140 49 2 57 23 3 6 20 2 54 22 3 9 22 -0.39 - 59 0 0 2 48 15 18 15 15.5 57 141 48 2 43 47 2 52 43 2 40 46 2 55 44 -0.39 - 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0 44 13 - 0 35 29 - 0 47 10 - 0 32 32 -0.40 - 31 0 0 - 0 41 26 18 16 52.7 68 196 22 - 0 45 48 - 0 37 4 - 0 48 45 - 0 34 7 -0.40 - 30 0 0 - 0 42 34 18 16 56.2 67 199 21 - 0 46 56 - 0 38 13 - 0 49 53 - 0 35 15 -0.40 - 29 0 0 - 0 43 16 18 16 59.7 67 201 20 - 0 47 38 - 0 38 54 - 0 50 35 - 0 35 57 -0.40 - 28 0 0 - 0 43 31 18 17 3.2 67 203 19 - 0 47 53 - 0 39 9 - 0 50 50 - 0 36 12 -0.40 - 27 0 0 - 0 43 20 18 17 6.7 66 205 18 - 0 47 42 - 0 38 58 - 0 50 38 - 0 36 1 -0.40 - 26 0 0 - 0 42 41 18 17 10.2 66 207 17 - 0 47 3 - 0 38 19 - 0 50 0 - 0 35 22 -0.40 - 25 0 0 - 0 41 36 18 17 13.7 65 209 16 - 0 45 58 - 0 37 14 - 0 48 55 - 0 34 17 -0.40 - 24 0 0 - 0 40 5 18 17 17.1 65 211 15 - 0 44 27 - 0 35 43 - 0 47 24 - 0 32 46 -0.40 - 23 0 0 - 0 38 7 18 17 20.5 64 213 14 - 0 42 28 - 0 33 44 - 0 45 25 - 0 30 47 -0.40 - 22 0 0 - 0 35 42 18 17 23.9 64 214 13 - 0 40 4 - 0 31 19 - 0 43 1 - 0 28 22 -0.40 - 21 0 0 - 0 32 50 18 17 27.3 63 216 12 - 0 37 12 - 0 28 28 - 0 40 9 - 0 25 31 -0.40 - 20 0 0 - 0 29 32 18 17 30.7 62 218 11 - 0 33 54 - 0 25 10 - 0 36 51 - 0 22 12 -0.40 - 19 0 0 - 0 25 48 18 17 34.1 62 219 10 - 0 30 10 - 0 21 25 - 0 33 7 - 0 18 28 -0.40 - 18 0 0 - 0 21 36 18 17 37.4 61 220 9 - 0 25 59 - 0 17 14 - 0 28 56 - 0 14 16 -0.40 - 17 0 0 - 0 16 59 18 17 40.7 60 222 8 - 0 21 22 - 0 12 36 - 0 24 19 - 0 9 39 -0.40 - 16 0 0 - 0 11 55 18 17 44.0 59 223 7 - 0 16 18 - 0 7 32 - 0 19 15 - 0 4 35 -0.40 - 15 0 0 - 0 6 25 18 17 47.3 59 224 6 - 0 10 48 - 0 2 2 - 0 13 45 0 0 56 -0.40 - 14 0 0 - 0 0 29 18 17 50.6 58 225 5 - 0 4 52 0 3 55 - 0 7 49 0 6 53 -0.40 - 13 0 0 0 5 54 18 17 53.8 57 226 4 0 1 31 0 10 18 - 0 1 27 0 13 16 -0.40 - 12 0 0 0 12 43 18 17 57.0 56 227 3 0 8 19 0 17 6 0 5 21 0 20 5 -0.40 - 11 0 0 0 19 58 18 18 0.1 55 228 2 0 15 34 0 24 21 0 12 36 0 27 20 -0.40 - 10 0 0 0 27 38 18 18 3.3 55 229 1 0 23 14 0 32 2 0 20 16 0 35 1 -0.40 - 9 0 0 0 35 45 18 18 6.4 54 229 0 0 31 21 0 40 9 0 28 22 0 43 8 -0.40 - 8 0 0 0 44 17 18 18 9.5 53 230 -1 0 39 53 0 48 42 0 36 54 0 51 41 -0.40 - 7 0 0 0 53 15 18 18 12.5 52 231 -2 0 48 51 0 57 40 0 45 52 1 0 39 -0.40 - 6 0 0 1 2 39 18 18 15.5 51 231 -3 0 58 14 1 7 4 0 55 15 1 10 3 -0.40 - 5 0 0 1 12 28 18 18 18.5 50 232 -4 1 8 2 1 16 53 1 5 3 1 19 52 -0.40 - 4 0 0 1 22 42 18 18 21.4 49 233 -5 1 18 16 1 27 8 1 15 17 1 30 7 -0.40 - 3 0 0 1 33 21 18 18 24.3 48 233 -6 1 28 55 1 37 47 1 25 56 1 40 47 -0.40 - 2 0 0 1 44 26 18 18 27.2 48 234 -7 1 40 0 1 48 52 1 37 0 1 51 52 -0.40 - 1 0 0 1 55 55 18 18 30.0 47 234 -8 1 51 28 2 0 22 1 48 28 2 3 22 -0.40 0 0 0 2 7 49 18 18 32.8 46 235 -9 2 3 22 2 12 16 2 0 22 2 15 16 -0.40 1 0 0 2 20 7 18 18 35.5 45 235 -10 2 15 40 2 24 35 2 12 40 2 27 35 -0.40 2 0 0 2 32 50 18 18 38.2 44 236 -11 2 28 23 2 37 18 2 25 22 2 40 19 -0.40 3 0 0 2 45 57 18 18 40.9 43 236 -12 2 41 29 2 50 25 2 38 28 2 53 26 -0.40 4 0 0 2 59 28 18 18 43.5 42 236 -13 2 55 0 3 3 56 2 51 58 3 6 58 -0.40 5 0 0 3 13 23 18 18 46.1 41 237 -14 3 8 54 3 17 51 3 5 52 3 20 53 -0.40 6 0 0 3 27 41 18 18 48.6 40 237 -15 3 23 12 3 32 10 3 20 10 3 35 12 -0.40 7 0 0 3 42 22 18 18 51.0 39 238 -16 3 37 53 3 46 52 3 34 51 3 49 54 -0.40 8 0 0 3 57 27 18 18 53.5 38 238 -17 3 52 57 4 1 57 3 49 55 4 4 59 -0.40 9 0 0 4 12 54 18 18 55.8 37 238 -18 4 8 24 4 17 24 4 5 21 4 20 27 -0.40 10 0 0 4 28 44 18 18 58.1 36 238 -19 4 24 13 4 33 15 4 21 11 4 36 18 -0.40 11 0 0 4 44 56 18 19 0.4 35 239 -20 4 40 25 4 49 27 4 37 22 4 52 31 -0.40 12 0 0 5 1 30 18 19 2.6 34 239 -21 4 56 59 5 6 2 4 53 56 5 9 6 -0.40 13 0 0 5 18 26 18 19 4.8 33 239 -22 5 13 55 5 22 58 5 10 51 5 26 2 -0.40 14 0 0 5 35 44 18 19 6.9 32 240 -23 5 31 11 5 40 16 5 28 8 5 43 20 -0.40 15 0 0 5 53 22 18 19 8.9 31 240 -25 5 48 49 5 57 55 5 45 45 6 0 59 -0.40 16 0 0 6 11 21 18 19 10.9 30 240 -26 6 6 48 6 15 55 6 3 44 6 18 59 -0.40 17 0 0 6 29 41 18 19 12.8 29 240 -27 6 25 7 6 34 15 6 22 3 6 37 20 -0.40 18 0 0 6 48 21 18 19 14.7 28 241 -28 6 43 46 6 52 55 6 40 41 6 56 0 -0.40 19 0 0 7 7 20 18 19 16.5 27 241 -29 7 2 45 7 11 54 6 59 40 7 15 0 -0.40 20 0 0 7 26 38 18 19 18.2 26 241 -30 7 22 3 7 31 13 7 18 58 7 34 19 -0.40 21 0 0 7 46 16 18 19 19.9 25 241 -31 7 41 40 7 50 51 7 38 35 7 53 58 -0.40 22 0 0 8 6 12 18 19 21.5 24 241 -32 8 1 36 8 10 48 7 58 30 8 13 54 -0.40 23 0 0 8 26 26 18 19 23.1 23 242 -33 8 21 50 8 31 2 8 18 43 8 34 9 -0.40 24 0 0 8 46 57 18 19 24.6 22 242 -34 8 42 21 8 51 34 8 39 14 8 54 41 -0.40 25 0 0 9 7 46 18 19 26.0 21 242 -35 9 3 9 9 12 23 9 0 2 9 15 31 -0.40 26 0 0 9 28 52 18 19 27.3 20 242 -36 9 24 14 9 33 29 9 21 7 9 36 37 -0.40 27 0 0 9 50 14 18 19 28.6 19 243 -37 9 45 36 9 54 52 9 42 28 9 58 0 -0.40 28 0 0 10 11 51 18 19 29.8 17 243 -38 10 7 13 10 16 30 10 4 5 10 19 38 -0.40 29 0 0 10 33 44 18 19 31.0 16 243 -39 10 29 5 10 38 23 10 25 57 10 41 31 -0.40 30 0 0 10 55 52 18 19 32.1 15 243 -40 10 51 13 11 0 31 10 48 4 11 3 40 -0.40 31 0 0 11 18 14 18 19 33.1 14 243 -41 11 13 34 11 22 53 11 10 25 11 26 2 -0.40 32 0 0 11 40 49 18 19 34.0 13 244 -42 11 36 9 11 45 29 11 33 0 11 48 39 -0.40 33 0 0 12 3 38 18 19 34.9 12 244 -43 11 58 58 12 8 18 11 55 48 12 11 28 -0.40 34 0 0 12 26 39 18 19 35.7 11 244 -44 12 21 59 12 31 20 12 18 49 12 34 30 -0.40 35 0 0 12 49 53 18 19 36.4 10 244 -45 12 45 12 12 54 34 12 42 2 12 57 44 -0.40 36 0 0 13 13 18 18 19 37.1 9 245 -46 13 8 36 13 17 59 13 5 26 13 21 10 -0.40 37 0 0 13 36 54 18 19 37.7 8 245 -47 13 32 12 13 41 35 13 29 2 13 44 46 -0.40 38 0 0 14 0 40 18 19 38.2 7 245 -48 13 55 58 14 5 22 13 52 47 14 8 33 -0.40 39 0 0 14 24 36 18 19 38.6 6 245 -49 14 19 53 14 29 18 14 16 42 14 32 29 -0.40 40 0 0 14 48 41 18 19 39.0 5 246 -50 14 43 58 14 53 24 14 40 47 14 56 35 -0.40 41 0 0 15 12 54 18 19 39.3 4 246 -51 15 8 11 15 17 37 15 5 0 15 20 49 -0.41 42 0 0 15 37 16 18 19 39.5 3 246 -52 15 32 32 15 41 59 15 29 21 15 45 11 -0.41 43 0 0 16 1 44 18 19 39.7 2 246 -53 15 57 1 16 6 28 15 53 49 16 9 40 -0.42 44 0 0 16 26 19 18 19 39.8 1 247 -54 16 21 36 16 31 3 16 18 24 16 34 15 -0.47 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 340-129452 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 15 11.2995 DE: -22 06 38.100 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 15 11.2995 DE: -22 06 38.100 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.9 * B mag [mag]: 13.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (25748) 2000 AP243 asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.63020 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2023 Apr 25 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): 0.015", 0.002", 97.121° remarks: * orbital elements for (25748)2000 AP243 : Mean anomaly = 246.4661943356 deg Arg. of pericenter = 288.0778696582 deg Long. of node = 117.9956783030 deg Inclination = 8.8977184384 deg Eccentricity = 0.0382027048 Semimajor axis = 3.1648471015 AU Perihelion dist = 3.0439413819 AU Mag: H = 12.90, G = 0.15 Epoch of elements : MJD 60611.76150745 TDT (2024 Oct 28.7615) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr25,0.47,2024,10,28,18.276185,0.023236,0.368608,18.002410,-1.163355,0.005053,0.000215,-0.000001,0.000000 -37.5581,-22.1036,-98.21,-13.46,False UCAC4 340-129452,18.25313878,-22.1105832,13.25,11.87,11.12,0.1,0,,18.27780346,-22.1035779,7.20,7.49,0,0,0 25748,2000 AP243,19.07,14.948,3.6302,0,0,3.138,-2.82,,1.4,0 0,246.3329,2024,10,28,288.0779,117.9957,8.8977,0.03820,3.16485,3.04394,12.89,5.0,0.15 1.338,0.0150,0.0017,97,0.0019,Known errors,0.90,0,-1,-1 20241028_129452,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org