IOTA/IOTA-ES occultation update for (20713) 1999 XA32 / UCAC4 389-131448 event on 2024 Nov 29, 17:30 UT Visible from Summary ------- On 2024 Nov 29 UT, the 20.508 km diameter asteroid (20713) 1999 XA32 will occult a 11.3 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 6.91 mag to 18.23 mag (the magnitude of the asteroid) for at most 0.660 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: 94 * date and approx. time of event: 2024 Nov 29, 17:26 - 2024 Nov 29, 17:33 * geocentric midpoint of event [JD]: 2460644.22929946 * magnitude of target star: 11.32 * magnitude drop [mag]: 6.91 * estimated maximum duration [s]: 0.660 * Moon: 3 % sunlit, 79° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.46 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 64°) * approx speed of asteroid's shadow [km/s]: 31.2204 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 389-131448 by 20713 1999 XA32 on 2024 Nov 29 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 -112 0 0 - 0 3 27 17 26 54.9 0 102 56 - 0 9 21 0 2 28 - 0 14 45 0 7 52 .... -111 0 0 - 0 16 23 17 26 54.9 1 102 57 - 0 22 17 - 0 10 28 - 0 27 40 - 0 5 5 -0.09 -110 0 0 - 0 28 59 17 26 55.1 2 102 57 - 0 34 53 - 0 23 5 - 0 40 16 - 0 17 42 -0.18 -109 0 0 - 0 41 17 17 26 55.2 3 102 58 - 0 47 10 - 0 35 23 - 0 52 33 - 0 30 0 -0.21 -108 0 0 - 0 53 14 17 26 55.5 4 102 59 - 0 59 7 - 0 47 21 - 1 4 30 - 0 41 58 -0.23 -107 0 0 - 1 4 53 17 26 55.8 5 102 60 - 1 10 45 - 0 59 0 - 1 16 7 - 0 53 37 -0.24 -106 0 0 - 1 16 11 17 26 56.2 6 102 61 - 1 22 3 - 1 10 18 - 1 27 25 - 1 4 56 -0.24 -105 0 0 - 1 27 9 17 26 56.6 7 102 62 - 1 33 1 - 1 21 17 - 1 38 22 - 1 15 55 -0.25 -104 0 0 - 1 37 47 17 26 57.1 8 102 62 - 1 43 39 - 1 31 55 - 1 49 0 - 1 26 34 -0.25 -103 0 0 - 1 48 4 17 26 57.7 9 102 63 - 1 53 56 - 1 42 13 - 1 59 17 - 1 36 52 -0.26 -102 0 0 - 1 58 2 17 26 58.3 10 102 64 - 2 3 52 - 1 52 10 - 2 9 13 - 1 46 49 -0.26 -101 0 0 - 2 7 38 17 26 59.1 11 102 65 - 2 13 29 - 2 1 47 - 2 18 49 - 1 56 26 -0.26 -100 0 0 - 2 16 53 17 26 59.8 12 102 66 - 2 22 44 - 2 11 3 - 2 28 4 - 2 5 42 -0.26 - 99 0 0 - 2 25 48 17 27 0.7 13 102 66 - 2 31 38 - 2 19 58 - 2 36 58 - 2 14 37 -0.26 - 98 0 0 - 2 34 21 17 27 1.6 14 102 67 - 2 40 11 - 2 28 31 - 2 45 31 - 2 23 11 -0.27 - 97 0 0 - 2 42 34 17 27 2.5 15 102 68 - 2 48 23 - 2 36 44 - 2 53 42 - 2 31 24 -0.27 - 96 0 0 - 2 50 25 17 27 3.6 16 102 68 - 2 56 14 - 2 44 35 - 3 1 33 - 2 39 16 -0.27 - 95 0 0 - 2 57 54 17 27 4.6 17 102 69 - 3 3 43 - 2 52 5 - 3 9 2 - 2 46 46 -0.27 - 94 0 0 - 3 5 2 17 27 5.8 18 102 69 - 3 10 51 - 2 59 13 - 3 16 9 - 2 53 54 -0.27 - 93 0 0 - 3 11 48 17 27 7.0 19 102 70 - 3 17 37 - 3 6 0 - 3 22 55 - 3 0 41 -0.27 - 92 0 0 - 3 18 13 17 27 8.3 20 102 70 - 3 24 1 - 3 12 24 - 3 29 19 - 3 7 6 -0.27 - 91 0 0 - 3 24 16 17 27 9.6 21 102 71 - 3 30 4 - 3 18 27 - 3 35 22 - 3 13 9 -0.27 - 90 0 0 - 3 29 56 17 27 11.0 22 102 71 - 3 35 44 - 3 24 8 - 3 41 2 - 3 18 50 -0.27 - 89 0 0 - 3 35 15 17 27 12.5 23 102 71 - 3 41 3 - 3 29 27 - 3 46 21 - 3 24 9 -0.27 - 88 0 0 - 3 40 12 17 27 14.0 24 102 72 - 3 46 0 - 3 34 24 - 3 51 17 - 3 29 6 -0.27 - 87 0 0 - 3 44 46 17 27 15.6 25 102 72 - 3 50 34 - 3 38 59 - 3 55 51 - 3 33 41 -0.27 - 86 0 0 - 3 48 59 17 27 17.2 26 102 72 - 3 54 46 - 3 43 11 - 4 0 3 - 3 37 54 -0.27 - 85 0 0 - 3 52 49 17 27 18.9 27 102 72 - 3 58 36 - 3 47 2 - 4 3 53 - 3 41 44 -0.27 - 84 0 0 - 3 56 17 17 27 20.6 28 102 72 - 4 2 4 - 3 50 30 - 4 7 21 - 3 45 12 -0.28 - 83 0 0 - 3 59 22 17 27 22.4 29 102 72 - 4 5 9 - 3 53 35 - 4 10 26 - 3 48 18 -0.28 - 82 0 0 - 4 2 5 17 27 24.3 30 102 72 - 4 7 52 - 3 56 18 - 4 13 9 - 3 51 1 -0.28 - 81 0 0 - 4 4 26 17 27 26.2 31 102 72 - 4 10 12 - 3 58 39 - 4 15 29 - 3 53 21 -0.28 - 80 0 0 - 4 6 24 17 27 28.2 32 102 72 - 4 12 10 - 4 0 37 - 4 17 27 - 3 55 20 -0.28 - 79 0 0 - 4 7 59 17 27 30.2 33 102 72 - 4 13 46 - 4 2 12 - 4 19 2 - 3 56 55 -0.28 - 78 0 0 - 4 9 12 17 27 32.3 34 102 71 - 4 14 59 - 4 3 25 - 4 20 15 - 3 58 8 -0.28 - 77 0 0 - 4 10 2 17 27 34.4 35 102 71 - 4 15 49 - 4 4 15 - 4 21 5 - 3 58 58 -0.28 - 76 0 0 - 4 10 30 17 27 36.6 36 102 71 - 4 16 16 - 4 4 43 - 4 21 33 - 3 59 26 -0.28 - 75 0 0 - 4 10 35 17 27 38.8 37 102 70 - 4 16 21 - 4 4 48 - 4 21 38 - 3 59 31 -0.28 - 74 0 0 - 4 10 17 17 27 41.1 38 102 70 - 4 16 4 - 4 4 30 - 4 21 20 - 3 59 13 -0.28 - 73 0 0 - 4 9 37 17 27 43.4 39 102 69 - 4 15 23 - 4 3 50 - 4 20 40 - 3 58 33 -0.28 - 72 0 0 - 4 8 33 17 27 45.8 40 103 69 - 4 14 20 - 4 2 47 - 4 19 37 - 3 57 29 -0.28 - 71 0 0 - 4 7 8 17 27 48.3 41 103 68 - 4 12 54 - 4 1 21 - 4 18 11 - 3 56 3 -0.28 - 70 0 0 - 4 5 19 17 27 50.8 42 103 67 - 4 11 6 - 3 59 32 - 4 16 23 - 3 54 15 -0.28 - 69 0 0 - 4 3 8 17 27 53.3 43 103 67 - 4 8 55 - 3 57 21 - 4 14 12 - 3 52 4 -0.28 - 68 0 0 - 4 0 34 17 27 55.9 44 103 66 - 4 6 21 - 3 54 47 - 4 11 38 - 3 49 29 -0.28 - 67 0 0 - 3 57 38 17 27 58.5 45 103 65 - 4 3 25 - 3 51 50 - 4 8 42 - 3 46 33 -0.28 - 66 0 0 - 3 54 18 17 28 1.2 46 104 64 - 4 0 6 - 3 48 31 - 4 5 23 - 3 43 13 -0.28 - 65 0 0 - 3 50 37 17 28 3.9 47 104 64 - 3 56 24 - 3 44 49 - 4 1 41 - 3 39 31 -0.28 - 64 0 0 - 3 46 32 17 28 6.7 48 104 63 - 3 52 20 - 3 40 45 - 3 57 37 - 3 35 27 -0.28 - 63 0 0 - 3 42 5 17 28 9.5 49 105 62 - 3 47 53 - 3 36 17 - 3 53 11 - 3 30 59 -0.28 - 62 0 0 - 3 37 16 17 28 12.3 50 105 61 - 3 43 4 - 3 31 28 - 3 48 22 - 3 26 10 -0.28 - 61 0 0 - 3 32 4 17 28 15.2 51 105 61 - 3 37 52 - 3 26 16 - 3 43 10 - 3 20 57 -0.28 - 60 0 0 - 3 26 30 17 28 18.2 52 106 60 - 3 32 18 - 3 20 41 - 3 37 36 - 3 15 23 -0.28 - 59 0 0 - 3 20 33 17 28 21.1 53 106 59 - 3 26 21 - 3 14 44 - 3 31 40 - 3 9 25 -0.28 - 58 0 0 - 3 14 14 17 28 24.1 54 106 58 - 3 20 3 - 3 8 25 - 3 25 21 - 3 3 6 -0.28 - 57 0 0 - 3 7 33 17 28 27.2 55 107 57 - 3 13 21 - 3 1 43 - 3 18 40 - 2 56 24 -0.28 - 56 0 0 - 3 0 29 17 28 30.3 56 107 56 - 3 6 18 - 2 54 40 - 3 11 37 - 2 49 20 -0.28 - 55 0 0 - 2 53 3 17 28 33.4 57 108 55 - 2 58 53 - 2 47 14 - 3 4 12 - 2 41 54 -0.28 - 54 0 0 - 2 45 16 17 28 36.6 57 109 54 - 2 51 5 - 2 39 26 - 2 56 25 - 2 34 6 -0.28 - 53 0 0 - 2 37 6 17 28 39.8 58 109 54 - 2 42 56 - 2 31 16 - 2 48 16 - 2 25 56 -0.28 - 52 0 0 - 2 28 35 17 28 43.0 59 110 53 - 2 34 25 - 2 22 44 - 2 39 45 - 2 17 24 -0.28 - 51 0 0 - 2 19 41 17 28 46.3 60 111 52 - 2 25 32 - 2 13 51 - 2 30 52 - 2 8 30 -0.28 - 50 0 0 - 2 10 26 17 28 49.6 61 112 51 - 2 16 17 - 2 4 35 - 2 21 38 - 1 59 14 -0.28 - 49 0 0 - 2 0 50 17 28 53.0 62 113 50 - 2 6 41 - 1 54 59 - 2 12 2 - 1 49 37 -0.28 - 48 0 0 - 1 50 52 17 28 56.3 63 114 49 - 1 56 44 - 1 45 0 - 2 2 5 - 1 39 39 -0.28 - 47 0 0 - 1 40 33 17 28 59.7 64 115 48 - 1 46 25 - 1 34 41 - 1 51 46 - 1 29 19 -0.28 - 46 0 0 - 1 29 53 17 29 3.2 64 116 47 - 1 35 45 - 1 24 0 - 1 41 7 - 1 18 38 -0.28 - 45 0 0 - 1 18 51 17 29 6.6 65 117 46 - 1 24 44 - 1 12 58 - 1 30 6 - 1 7 36 -0.28 - 44 0 0 - 1 7 29 17 29 10.1 66 119 45 - 1 13 22 - 1 1 36 - 1 18 45 - 0 56 13 -0.28 - 43 0 0 - 0 55 46 17 29 13.6 67 120 44 - 1 1 40 - 0 49 53 - 1 7 2 - 0 44 29 -0.28 - 42 0 0 - 0 43 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17 31 43.0 58 223 2 11 1 53 11 14 11 10 56 16 11 19 48 -0.28 - 1 0 0 11 29 46 17 31 46.3 58 224 1 11 23 37 11 35 55 11 18 0 11 41 33 -0.28 0 0 0 11 51 35 17 31 49.6 57 225 -1 11 45 26 11 57 45 11 39 49 12 3 23 -0.28 1 0 0 12 13 29 17 31 52.8 56 226 -2 12 7 19 12 19 39 12 1 42 12 25 17 -0.28 2 0 0 12 35 27 17 31 56.0 55 226 -3 12 29 17 12 41 37 12 23 39 12 47 15 -0.28 3 0 0 12 57 28 17 31 59.2 54 227 -4 12 51 18 13 3 38 12 45 40 13 9 16 -0.28 4 0 0 13 19 31 17 32 2.3 53 228 -5 13 13 21 13 25 41 13 7 43 13 31 20 -0.28 5 0 0 13 41 37 17 32 5.4 52 229 -6 13 35 27 13 47 48 13 29 49 13 53 26 -0.28 6 0 0 14 3 45 17 32 8.4 51 229 -7 13 57 35 14 9 55 13 51 56 14 15 34 -0.28 7 0 0 14 25 54 17 32 11.4 50 230 -8 14 19 43 14 32 4 14 14 5 14 37 43 -0.28 8 0 0 14 48 3 17 32 14.3 49 231 -9 14 41 53 14 54 14 14 36 14 14 59 53 -0.28 9 0 0 15 10 13 17 32 17.2 48 231 -10 15 4 2 15 16 23 14 58 24 15 22 2 -0.28 10 0 0 15 32 22 17 32 20.0 47 232 -11 15 26 11 15 38 32 15 20 33 15 44 11 -0.28 11 0 0 15 54 30 17 32 22.8 46 233 -12 15 48 19 16 0 40 15 42 41 16 6 19 -0.28 12 0 0 16 16 36 17 32 25.6 45 233 -13 16 10 26 16 22 47 16 4 47 16 28 26 -0.28 13 0 0 16 38 40 17 32 28.2 44 234 -14 16 32 30 16 44 51 16 26 51 16 50 30 -0.28 14 0 0 17 0 42 17 32 30.9 43 234 -15 16 54 32 17 6 53 16 48 53 17 12 32 -0.28 15 0 0 17 22 41 17 32 33.4 42 235 -16 17 16 30 17 28 52 17 10 52 17 34 30 -0.28 16 0 0 17 44 36 17 32 35.9 41 235 -17 17 38 25 17 50 46 17 32 47 17 56 25 -0.28 17 0 0 18 6 27 17 32 38.4 40 236 -18 18 0 16 18 12 37 17 54 38 18 18 16 -0.28 18 0 0 18 28 13 17 32 40.8 39 236 -19 18 22 2 18 34 23 18 16 24 18 40 2 -0.28 19 0 0 18 49 54 17 32 43.2 38 237 -20 18 43 44 18 56 4 18 38 5 19 1 43 -0.28 20 0 0 19 11 29 17 32 45.4 37 237 -21 19 5 19 19 17 39 18 59 41 19 23 18 -0.28 21 0 0 19 32 58 17 32 47.7 36 238 -22 19 26 48 19 39 8 19 21 11 19 44 47 -0.28 22 0 0 19 54 21 17 32 49.8 35 238 -23 19 48 11 20 0 31 19 42 33 20 6 9 -0.28 23 0 0 20 15 36 17 32 51.9 34 239 -24 20 9 27 20 21 46 20 3 49 20 27 24 -0.28 24 0 0 20 36 44 17 32 54.0 33 239 -25 20 30 35 20 42 54 20 24 57 20 48 32 -0.28 25 0 0 20 57 44 17 32 56.0 32 240 -26 20 51 35 21 3 54 20 45 58 21 9 31 -0.28 26 0 0 21 18 36 17 32 57.9 31 240 -27 21 12 27 21 24 45 21 6 50 21 30 22 -0.28 27 0 0 21 39 18 17 32 59.8 30 241 -28 21 33 10 21 45 27 21 27 33 21 51 5 -0.28 28 0 0 21 59 52 17 33 1.6 29 241 -29 21 53 43 22 6 1 21 48 7 22 11 38 -0.28 29 0 0 22 20 16 17 33 3.3 28 242 -30 22 14 7 22 26 24 22 8 31 22 32 1 -0.28 30 0 0 22 40 29 17 33 5.0 27 242 -31 22 34 21 22 46 37 22 28 45 22 52 14 -0.28 31 0 0 23 0 33 17 33 6.6 26 243 -32 22 54 25 23 6 40 22 48 49 23 12 17 -0.28 32 0 0 23 20 25 17 33 8.2 25 243 -33 23 14 18 23 26 33 23 8 42 23 32 9 -0.28 33 0 0 23 40 6 17 33 9.7 24 243 -34 23 33 59 23 46 13 23 28 24 23 51 49 -0.28 34 0 0 23 59 36 17 33 11.2 23 244 -35 23 53 29 24 5 43 23 47 54 24 11 18 -0.28 35 0 0 24 18 54 17 33 12.5 22 244 -36 24 12 47 24 25 0 24 7 12 24 30 35 -0.28 36 0 0 24 37 59 17 33 13.8 21 245 -37 24 31 53 24 44 5 24 26 19 24 49 40 -0.28 37 0 0 24 56 52 17 33 15.1 20 245 -38 24 50 46 25 2 58 24 45 12 25 8 33 -0.28 38 0 0 25 15 32 17 33 16.3 19 246 -39 25 9 27 25 21 38 25 3 53 25 27 12 -0.28 39 0 0 25 33 59 17 33 17.4 18 246 -40 25 27 54 25 40 4 25 22 21 25 45 38 -0.28 40 0 0 25 52 13 17 33 18.5 17 247 -41 25 46 8 25 58 18 25 40 35 26 3 51 -0.28 41 0 0 26 10 13 17 33 19.5 16 247 -42 26 4 8 26 16 17 25 58 36 26 21 50 -0.28 42 0 0 26 27 59 17 33 20.5 15 248 -43 26 21 55 26 34 3 26 16 22 26 39 36 -0.28 43 0 0 26 45 30 17 33 21.4 14 248 -44 26 39 27 26 51 34 26 33 55 26 57 7 -0.28 44 0 0 27 2 48 17 33 22.2 14 248 -45 26 56 44 27 8 51 26 51 13 27 14 23 -0.28 45 0 0 27 19 50 17 33 23.0 13 249 -45 27 13 47 27 25 53 27 8 16 27 31 25 -0.28 46 0 0 27 36 38 17 33 23.7 12 249 -46 27 30 35 27 42 40 27 25 4 27 48 12 -0.28 47 0 0 27 53 10 17 33 24.4 11 250 -47 27 47 8 27 59 12 27 41 38 28 4 43 -0.28 48 0 0 28 9 27 17 33 25.0 10 250 -48 28 3 26 28 15 29 27 57 56 28 21 0 -0.28 49 0 0 28 25 29 17 33 25.5 9 251 -49 28 19 28 28 31 30 28 13 58 28 37 0 -0.28 50 0 0 28 41 15 17 33 26.0 8 251 -50 28 35 14 28 47 16 28 29 45 28 52 46 -0.28 51 0 0 28 56 45 17 33 26.5 7 252 -51 28 50 45 29 2 45 28 45 16 29 8 15 -0.28 52 0 0 29 11 59 17 33 26.9 6 252 -52 29 5 59 29 17 59 29 0 30 29 23 28 -0.28 53 0 0 29 26 57 17 33 27.2 5 253 -53 29 20 57 29 32 56 29 15 29 29 38 25 -0.28 54 0 0 29 41 38 17 33 27.5 4 253 -53 29 35 39 29 47 37 29 30 11 29 53 5 -0.28 55 0 0 29 56 3 17 33 27.7 3 254 -54 29 50 4 30 2 2 29 44 37 30 7 29 -0.29 56 0 0 30 10 11 17 33 27.9 3 254 -55 30 4 13 30 16 10 29 58 46 30 21 37 -0.29 57 0 0 30 24 3 17 33 28.0 2 255 -56 30 18 5 30 30 1 30 12 39 30 35 28 -0.30 58 0 0 30 37 38 17 33 28.0 1 255 -57 30 31 41 30 43 35 30 26 14 30 49 2 -0.32 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 389-131448 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 33 19.2430 DE: -12 21 08.897 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 33 19.2429 DE: -12 21 08.897 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (20713) 1999 XA32 asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.59180 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.016", 0.002", 63.88° remarks: * orbital elements for (20713)1999 XA32 : Mean anomaly = 96.6474103924 deg Arg. of pericenter = 284.8093343230 deg Long. of node = 290.1552281042 deg Inclination = 12.6714998276 deg Eccentricity = 0.1087155562 Semimajor axis = 3.1406444249 AU Perihelion dist = 2.7992075196 AU Mag: H = 12.07, G = 0.15 Epoch of elements : MJD 60643.72929917 TDT (2024 Nov 29.7293) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr25,0.66,2024,11,29,17.503187,-0.073784,0.260309,16.962394,4.775023,0.004985,0.001628,-0.000001,0.000000 -22.9696,-12.2684,-85.41,-21.64,False UCAC4 389-131448,20.55534531,-12.3524712,11.86,11.32,11.03,0.0,0,,20.57798141,-12.2683786,6.91,6.75,0,0,0 20713,1999 XA32,18.23,20.508,3.5918,0,0,2.834,11.69,,1.8,0 0,96.5183,2024,11,29,284.8093,290.1552,12.6715,0.10872,3.14064,2.79921,12.07,5.0,0.15 1.457,0.0163,0.0021,64,0.0036,Known errors,1.15,0,-1,-1 20241129_131448,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org