IOTA/IOTA-ES occultation update for (732) Tjilaki / UCAC4 375-113664 event on 2024 Oct 25, 13:52 UT Visible from Summary ------- On 2024 Oct 25 UT, the 33.2583790471352 km diameter asteroid (732) Tjilaki will occult a 11.8 mag star in the constellation Serpens for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.85 mag to 15.66 mag (the magnitude of the asteroid) for at most 0.990 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: 2024 Oct 25, 13:48 - 2024 Oct 25, 13:55 * geocentric midpoint of event [JD]: 2460609.07786787 * magnitude of target star: 11.84 * magnitude drop [mag]: 3.85 * estimated maximum duration [s]: 0.990 * Moon: 38 % sunlit, 136° distance * Sun: 61° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 34 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.003", 93°) * approx speed of asteroid's shadow [km/s]: 33.7830 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 375-113664 by 732 Tjilaki on 2024 Oct 25 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 - 54 0 0 .. .. .... .. .. .. .. .. .. 15 25 47 .. .. .. 15 22 43 .. .. .. .... - 53 0 0 15 18 57 13 49 1.8 1 106 55 15 9 24 15 28 30 15 6 21 15 31 34 .... - 52 0 0 15 2 27 13 49 1.9 2 106 56 14 52 54 15 12 1 14 49 50 15 15 4 -0.07 - 51 0 0 14 45 50 13 49 2.0 3 106 57 14 36 16 14 55 23 14 33 12 14 58 27 -0.10 - 50 0 0 14 29 5 13 49 2.2 4 107 57 14 19 31 14 38 39 14 16 28 14 41 43 -0.12 - 49 0 0 14 12 14 13 49 2.5 5 107 58 14 2 40 14 21 48 13 59 36 14 24 52 -0.13 - 48 0 0 13 55 16 13 49 2.8 6 107 59 13 45 42 14 4 51 13 42 38 14 7 55 -0.13 - 47 0 0 13 38 12 13 49 3.2 7 107 60 13 28 38 13 47 47 13 25 34 13 50 51 -0.14 - 46 0 0 13 21 3 13 49 3.7 8 108 60 13 11 28 13 30 38 13 8 24 13 33 42 -0.14 - 45 0 0 13 3 48 13 49 4.2 9 108 61 12 54 13 13 13 23 12 51 9 13 16 27 -0.14 - 44 0 0 12 46 27 13 49 4.7 10 108 62 12 36 52 12 56 3 12 33 48 12 59 7 -0.15 - 43 0 0 12 29 3 13 49 5.3 11 108 63 12 19 27 12 38 38 12 16 23 12 41 42 -0.15 - 42 0 0 12 11 34 13 49 6.0 12 109 63 12 1 58 12 21 9 11 58 54 12 24 13 -0.15 - 41 0 0 11 54 0 13 49 6.8 13 109 64 11 44 25 12 3 36 11 41 21 12 6 40 -0.15 - 40 0 0 11 36 24 13 49 7.6 14 109 65 11 26 48 11 46 0 11 23 44 11 49 4 -0.15 - 39 0 0 11 18 43 13 49 8.5 15 109 65 11 9 8 11 28 20 11 6 4 11 31 24 -0.15 - 38 0 0 11 1 0 13 49 9.4 16 109 66 10 51 25 11 10 37 10 48 20 11 13 41 -0.15 - 37 0 0 10 43 15 13 49 10.4 17 110 66 10 33 39 10 52 51 10 30 35 10 55 56 -0.15 - 36 0 0 10 25 27 13 49 11.4 18 110 67 10 15 51 10 35 4 10 12 47 10 38 8 -0.15 - 35 0 0 10 7 38 13 49 12.5 19 110 67 9 58 2 10 17 14 9 54 58 10 20 19 -0.16 - 34 0 0 9 49 47 13 49 13.7 20 110 68 9 40 11 9 59 24 9 37 7 10 2 28 -0.16 - 33 0 0 9 31 56 13 49 14.9 21 110 68 9 22 19 9 41 32 9 19 15 9 44 36 -0.16 - 32 0 0 9 14 3 13 49 16.2 22 111 68 9 4 27 9 23 40 9 1 23 9 26 44 -0.16 - 31 0 0 8 56 11 13 49 17.6 23 111 69 8 46 35 9 5 47 8 43 30 9 8 51 -0.16 - 30 0 0 8 38 18 13 49 19.0 24 111 69 8 28 42 8 47 55 8 25 38 8 50 59 -0.16 - 29 0 0 8 20 27 13 49 20.4 26 111 69 8 10 51 8 30 3 8 7 47 8 33 7 -0.16 - 28 0 0 8 2 36 13 49 22.0 27 111 69 7 53 0 8 12 12 7 49 56 8 15 16 -0.16 - 27 0 0 7 44 47 13 49 23.5 28 112 69 7 35 11 7 54 23 7 32 7 7 57 27 -0.16 - 26 0 0 7 26 59 13 49 25.2 29 112 69 7 17 23 7 36 35 7 14 19 7 39 39 -0.16 - 25 0 0 7 9 13 13 49 26.9 30 112 69 6 59 38 7 18 49 6 56 34 7 21 53 -0.16 - 24 0 0 6 51 31 13 49 28.6 31 112 69 6 41 55 7 1 6 6 38 51 7 4 10 -0.16 - 23 0 0 6 33 51 13 49 30.4 32 112 69 6 24 15 6 43 26 6 21 12 6 46 30 -0.16 - 22 0 0 6 16 14 13 49 32.3 33 112 69 6 6 39 6 25 49 6 3 35 6 28 53 -0.16 - 21 0 0 5 58 41 13 49 34.2 34 113 69 5 49 6 6 8 16 5 46 3 6 11 20 -0.16 - 20 0 0 5 41 13 13 49 36.2 35 113 69 5 31 38 5 50 47 5 28 34 5 53 51 -0.16 - 19 0 0 5 23 48 13 49 38.2 36 113 68 5 14 14 5 33 23 5 11 10 5 36 27 -0.16 - 18 0 0 5 6 29 13 49 40.3 37 113 68 4 56 55 5 16 4 4 53 51 5 19 7 -0.16 - 17 0 0 4 49 15 13 49 42.4 38 113 68 4 39 41 4 58 49 4 36 38 5 1 53 -0.16 - 16 0 0 4 32 7 13 49 44.6 39 114 67 4 22 33 4 41 41 4 19 30 4 44 44 -0.16 - 15 0 0 4 15 4 13 49 46.8 40 114 67 4 5 31 4 24 38 4 2 28 4 27 42 -0.16 - 14 0 0 3 58 9 13 49 49.0 41 114 66 3 48 35 4 7 42 3 45 32 4 10 45 -0.16 - 13 0 0 3 41 19 13 49 51.4 42 114 66 3 31 47 3 50 53 3 28 43 3 53 56 -0.16 - 12 0 0 3 24 37 13 49 53.7 43 114 65 3 15 5 3 34 10 3 12 2 3 37 14 -0.16 - 11 0 0 3 8 3 13 49 56.1 44 115 64 2 58 31 3 17 36 2 55 28 3 20 39 -0.16 - 10 0 0 2 51 36 13 49 58.6 45 115 64 2 42 5 3 1 9 2 39 2 3 4 12 -0.16 - 9 0 0 2 35 18 13 50 1.1 46 115 63 2 25 46 2 44 50 2 22 44 2 47 53 -0.16 - 8 0 0 2 19 8 13 50 3.6 47 115 62 2 9 37 2 28 40 2 6 34 2 31 43 -0.16 - 7 0 0 2 3 7 13 50 6.2 48 116 62 1 53 36 2 12 38 1 50 34 2 15 41 -0.16 - 6 0 0 1 47 16 13 50 8.8 49 116 61 1 37 45 1 56 46 1 34 43 1 59 49 -0.16 - 5 0 0 1 31 33 13 50 11.5 50 116 60 1 22 3 1 41 4 1 19 1 1 44 6 -0.16 - 4 0 0 1 16 1 13 50 14.2 51 116 59 1 6 32 1 25 31 1 3 29 1 28 34 -0.16 - 3 0 0 1 0 39 13 50 16.9 52 117 59 0 51 10 1 10 9 0 48 8 1 13 11 -0.16 - 2 0 0 0 45 28 13 50 19.7 53 117 58 0 35 59 0 54 57 0 32 57 0 57 59 -0.16 - 1 0 0 0 30 27 13 50 22.5 54 117 57 0 20 59 0 39 56 0 17 57 0 42 58 -0.16 0 0 0 0 15 38 13 50 25.4 55 118 56 0 6 10 0 25 6 0 3 8 0 28 8 -0.16 1 0 0 0 1 0 13 50 28.3 56 118 55 - 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6 39 48 - 7 1 9 - 6 36 51 -0.17 51 0 0 - 6 50 9 13 53 9.8 68 246 8 - 6 59 21 - 6 40 57 - 7 2 18 - 6 38 0 -0.17 52 0 0 - 6 51 0 13 53 12.9 68 247 7 - 7 0 12 - 6 41 48 - 7 3 9 - 6 38 51 -0.17 53 0 0 - 6 51 32 13 53 16.0 67 247 6 - 7 0 44 - 6 42 20 - 7 3 41 - 6 39 23 -0.17 54 0 0 - 6 51 46 13 53 19.1 66 248 5 - 7 0 58 - 6 42 34 - 7 3 55 - 6 39 37 -0.17 55 0 0 - 6 51 42 13 53 22.1 65 249 4 - 7 0 54 - 6 42 29 - 7 3 50 - 6 39 33 -0.17 56 0 0 - 6 51 19 13 53 25.2 64 249 3 - 7 0 31 - 6 42 7 - 7 3 27 - 6 39 10 -0.17 57 0 0 - 6 50 38 13 53 28.2 63 250 2 - 6 59 50 - 6 41 25 - 7 2 46 - 6 38 28 -0.17 58 0 0 - 6 49 38 13 53 31.1 62 251 1 - 6 58 50 - 6 40 25 - 7 1 46 - 6 37 29 -0.17 59 0 0 - 6 48 20 13 53 34.1 61 251 0 - 6 57 32 - 6 39 7 - 7 0 28 - 6 36 11 -0.17 60 0 0 - 6 46 43 13 53 37.0 60 251 -1 - 6 55 55 - 6 37 31 - 6 58 52 - 6 34 34 -0.17 61 0 0 - 6 44 48 13 53 39.9 59 252 -2 - 6 54 1 - 6 35 36 - 6 56 57 - 6 32 39 -0.17 62 0 0 - 6 42 35 13 53 42.8 58 252 -3 - 6 51 48 - 6 33 23 - 6 54 44 - 6 30 26 -0.17 63 0 0 - 6 40 4 13 53 45.6 57 252 -4 - 6 49 17 - 6 30 51 - 6 52 13 - 6 27 54 -0.17 64 0 0 - 6 37 15 13 53 48.4 56 253 -5 - 6 46 27 - 6 28 2 - 6 49 24 - 6 25 5 -0.17 65 0 0 - 6 34 7 13 53 51.2 55 253 -6 - 6 43 20 - 6 24 54 - 6 46 16 - 6 21 57 -0.17 66 0 0 - 6 30 41 13 53 53.9 54 253 -7 - 6 39 54 - 6 21 28 - 6 42 51 - 6 18 31 -0.17 67 0 0 - 6 26 57 13 53 56.6 53 253 -8 - 6 36 10 - 6 17 44 - 6 39 7 - 6 14 47 -0.17 68 0 0 - 6 22 55 13 53 59.3 52 254 -9 - 6 32 8 - 6 13 41 - 6 35 5 - 6 10 44 -0.17 69 0 0 - 6 18 35 13 54 2.0 51 254 -10 - 6 27 49 - 6 9 21 - 6 30 46 - 6 6 24 -0.17 70 0 0 - 6 13 57 13 54 4.6 50 254 -11 - 6 23 11 - 6 4 43 - 6 26 8 - 6 1 46 -0.17 71 0 0 - 6 9 2 13 54 7.1 49 254 -12 - 6 18 16 - 5 59 47 - 6 21 13 - 5 56 50 -0.17 72 0 0 - 6 3 48 13 54 9.7 48 254 -13 - 6 13 2 - 5 54 34 - 6 16 0 - 5 51 36 -0.17 73 0 0 - 5 58 17 13 54 12.2 47 254 -14 - 6 7 31 - 5 49 2 - 6 10 29 - 5 46 5 -0.17 74 0 0 - 5 52 28 13 54 14.6 46 254 -15 - 6 1 43 - 5 43 13 - 6 4 40 - 5 40 16 -0.17 75 0 0 - 5 46 22 13 54 17.0 45 254 -16 - 5 55 37 - 5 37 7 - 5 58 34 - 5 34 9 -0.17 76 0 0 - 5 39 58 13 54 19.4 44 254 -17 - 5 49 14 - 5 30 43 - 5 52 11 - 5 27 45 -0.17 77 0 0 - 5 33 17 13 54 21.8 43 254 -18 - 5 42 33 - 5 24 2 - 5 45 31 - 5 21 4 -0.17 78 0 0 - 5 26 19 13 54 24.0 42 255 -19 - 5 35 35 - 5 17 3 - 5 38 33 - 5 14 5 -0.17 79 0 0 - 5 19 4 13 54 26.3 41 255 -20 - 5 28 20 - 5 9 47 - 5 31 18 - 5 6 49 -0.17 80 0 0 - 5 11 32 13 54 28.5 40 255 -21 - 5 20 48 - 5 2 15 - 5 23 46 - 4 59 17 -0.17 81 0 0 - 5 3 42 13 54 30.7 39 255 -22 - 5 12 59 - 4 54 25 - 5 15 57 - 4 51 27 -0.17 82 0 0 - 4 55 36 13 54 32.8 38 255 -23 - 5 4 53 - 4 46 19 - 5 7 52 - 4 43 21 -0.17 83 0 0 - 4 47 14 13 54 34.9 37 255 -24 - 4 56 31 - 4 37 56 - 4 59 29 - 4 34 57 -0.17 84 0 0 - 4 38 34 13 54 36.9 36 255 -25 - 4 47 52 - 4 29 16 - 4 50 51 - 4 26 18 -0.17 85 0 0 - 4 29 39 13 54 38.9 35 255 -26 - 4 38 57 - 4 20 21 - 4 41 56 - 4 17 22 -0.17 86 0 0 - 4 20 27 13 54 40.8 34 255 -27 - 4 29 46 - 4 11 8 - 4 32 44 - 4 8 10 -0.17 87 0 0 - 4 10 59 13 54 42.7 33 255 -28 - 4 20 18 - 4 1 40 - 4 23 17 - 3 58 41 -0.17 88 0 0 - 4 1 15 13 54 44.5 32 255 -29 - 4 10 35 - 3 51 56 - 4 13 34 - 3 48 57 -0.17 89 0 0 - 3 51 16 13 54 46.3 31 255 -30 - 4 0 36 - 3 41 56 - 4 3 35 - 3 38 57 -0.17 90 0 0 - 3 41 1 13 54 48.1 30 255 -31 - 3 50 21 - 3 31 40 - 3 53 20 - 3 28 41 -0.17 91 0 0 - 3 30 30 13 54 49.8 29 255 -32 - 3 39 51 - 3 21 9 - 3 42 50 - 3 18 10 -0.17 92 0 0 - 3 19 44 13 54 51.4 28 255 -33 - 3 29 5 - 3 10 23 - 3 32 4 - 3 7 24 -0.17 93 0 0 - 3 8 43 13 54 53.0 27 255 -34 - 3 18 4 - 2 59 22 - 3 21 4 - 2 56 22 -0.17 94 0 0 - 2 57 27 13 54 54.5 26 255 -35 - 3 6 49 - 2 48 5 - 3 9 49 - 2 45 6 -0.17 95 0 0 - 2 45 57 13 54 56.0 25 255 -36 - 2 55 19 - 2 36 34 - 2 58 19 - 2 33 35 -0.17 96 0 0 - 2 34 12 13 54 57.4 24 255 -37 - 2 43 34 - 2 24 49 - 2 46 34 - 2 21 49 -0.17 97 0 0 - 2 22 12 13 54 58.8 23 255 -38 - 2 31 35 - 2 12 49 - 2 34 35 - 2 9 49 -0.17 98 0 0 - 2 9 59 13 55 0.1 22 255 -39 - 2 19 22 - 2 0 35 - 2 22 22 - 1 57 35 -0.17 99 0 0 - 1 57 32 13 55 1.3 21 255 -40 - 2 6 55 - 1 48 8 - 2 9 56 - 1 45 7 -0.17 100 0 0 - 1 44 51 13 55 2.5 20 255 -41 - 1 54 15 - 1 35 26 - 1 57 15 - 1 32 26 -0.17 101 0 0 - 1 31 56 13 55 3.7 19 255 -42 - 1 41 21 - 1 22 32 - 1 44 21 - 1 19 31 -0.17 102 0 0 - 1 18 49 13 55 4.8 18 255 -43 - 1 28 14 - 1 9 24 - 1 31 14 - 1 6 23 -0.17 103 0 0 - 1 5 28 13 55 5.8 17 255 -44 - 1 14 54 - 0 56 3 - 1 17 55 - 0 53 2 -0.17 104 0 0 - 0 51 55 13 55 6.8 16 255 -45 - 1 1 21 - 0 42 29 - 1 4 22 - 0 39 28 -0.17 105 0 0 - 0 38 10 13 55 7.7 15 255 -46 - 0 47 36 - 0 28 43 - 0 50 37 - 0 25 42 -0.17 106 0 0 - 0 24 12 13 55 8.5 14 255 -47 - 0 33 39 - 0 14 45 - 0 36 40 - 0 11 44 -0.17 107 0 0 - 0 10 2 13 55 9.3 13 255 -48 - 0 19 29 - 0 0 35 - 0 22 31 0 2 27 -0.17 108 0 0 0 4 19 13 55 10.1 12 255 -49 - 0 5 8 0 13 47 - 0 8 10 0 16 48 -0.17 109 0 0 0 18 52 13 55 10.7 11 255 -50 0 9 24 0 28 20 0 6 22 0 31 21 -0.17 110 0 0 0 33 35 13 55 11.3 10 255 -51 0 24 7 0 43 4 0 21 5 0 46 6 -0.16 111 0 0 0 48 30 13 55 11.9 9 255 -52 0 39 1 0 57 59 0 35 59 1 1 1 -0.16 112 0 0 1 3 35 13 55 12.4 8 255 -53 0 54 6 1 13 4 0 51 4 1 16 6 -0.16 113 0 0 1 18 50 13 55 12.8 7 255 -54 1 9 20 1 28 19 1 6 18 1 31 22 -0.16 114 0 0 1 34 15 13 55 13.2 6 255 -55 1 24 45 1 43 45 1 21 43 1 46 47 -0.16 115 0 0 1 49 49 13 55 13.5 5 255 -56 1 40 19 1 59 20 1 37 17 2 2 22 -0.16 116 0 0 2 5 33 13 55 13.7 3 255 -57 1 56 2 2 15 4 1 53 0 2 18 6 -0.16 117 0 0 2 21 26 13 55 13.9 2 255 -58 2 11 55 2 30 57 2 8 52 2 33 59 -0.16 118 0 0 2 37 27 13 55 14.0 1 255 -59 2 27 56 2 46 58 2 24 53 2 50 1 -0.16 119 0 0 2 53 36 13 55 14.1 0 255 -61 2 44 5 3 3 8 2 41 2 3 6 11 -0.13 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 375-113664 * constellation : Serpens * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 12 19.9219 DE: -15 05 03.125 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 12 19.9218 DE: -15 05 03.125 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.8 * B mag [mag]: 13.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (732) Tjilaki asteroid class: approx. diameter [km]: 33 approx. diameter ["]: 0.017 distance from Earth [AU]: 2.71100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.012", 0.003", 92.696° remarks: * orbital elements for (732)Tjilaki : Mean anomaly = 53.1986857993 deg Arg. of pericenter = 63.3394926474 deg Long. of node = 173.2935601876 deg Inclination = 11.0025851187 deg Eccentricity = 0.0448897987 Semimajor axis = 2.4561743156 AU Perihelion dist = 2.3459171451 AU Mag: H = 10.56, G = 0.15 Epoch of elements : MJD 60608.57786766 TDT (2024 Oct 25.5779) ------ occelmnt file for Occult BEGIN ----------------------------------- <Occultations> <Event> <Elements>JPL#582023Apr24,0.99,2024,10,25,13.868829,0.018144,0.165183,18.946078,-2.153265,0.004945,0.000514,-0.000001,0.000000</Elements> <Earth>30.9575,-15.0783,-32.03,-12.39,False</Earth> <Star>UCAC4 375-113664,18.20553389,-15.0842014,13.20,11.84,11.11,0.1,4,,18.22896474,-15.0782945,3.85,4.13,0,0,0</Star> <Object>732,Tjilaki,15.66,33.455,2.7110,0,0,4.243,-6.98,,1.8,0</Object> <Orbit>0,53.0507,2024,10,25,63.3395,173.2936,11.0026,0.04489,2.45617,2.34592,10.56,5.0,0.15</Orbit> <Errors>1.160,0.0120,0.0026,93,0.0027,Known errors,1.46,0,-1,-1</Errors> <ID>20241025_113664,60140.66</ID> </Event> </Occultations> ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org