IOTA/IOTA-ES occultation update for (206) Hersilia / TYC 6252-02422-1 event on 2023 May 08, 04:05 UT Visible from Africa, South America, Central America Summary ------- On 2023 May 08 UT, the 99 km diameter asteroid (206) Hersilia will occult a 10.5 mag star in the constellation Ophiuchus for observers along a path across Africa, South America, Central America. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.90 mag to 13.34 mag (the magnitude of the asteroid) for at most 15.500 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 May 08, 03:48 - 2023 May 08, 04:21 * geocentric midpoint of event [JD]: 2460072.67016808 * magnitude of target star: 10.52 * magnitude drop [mag]: 2.90 * estimated maximum duration [s]: 15.500 * Moon: 93 % sunlit, 11° distance * Sun: 142° distance * rough path description: Africa, South America, Central America The occultation path -------------------- * approximate projected width [km]: 102 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.005", 91°) * approx speed of asteroid's shadow [km/s]: 6.3870 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6252-02422-1 by 206 Hersilia on 2023 May 8 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 -108 0 0 22 45 25 4 21 14.0 1 110 -33 23 14 54 22 16 0 23 19 53 22 11 2 .... -107 0 0 22 25 14 4 21 13.7 2 110 -34 22 54 45 21 55 48 22 59 45 21 50 50 -0.10 -106 0 0 22 4 53 4 21 13.0 3 111 -35 22 34 25 21 35 25 22 39 25 21 30 26 -0.16 -105 0 0 21 44 20 4 21 12.1 4 111 -36 22 13 54 21 14 50 22 18 54 21 9 52 -0.18 -104 0 0 21 23 37 4 21 10.9 5 111 -37 21 53 12 20 54 6 21 58 12 20 49 7 -0.20 -103 0 0 21 2 44 4 21 9.3 6 112 -38 21 32 20 20 33 12 21 37 21 20 28 12 -0.21 -102 0 0 20 41 41 4 21 7.5 7 112 -39 21 11 18 20 12 7 21 16 19 20 7 8 -0.22 -101 0 0 20 20 29 4 21 5.3 8 113 -39 20 50 7 19 50 54 20 55 9 19 45 55 -0.22 -100 0 0 19 59 8 4 21 2.9 9 113 -40 20 28 48 19 29 33 20 33 49 19 24 33 -0.23 - 99 0 0 19 37 39 4 21 0.1 10 113 -41 20 7 20 19 8 3 20 12 21 19 3 3 -0.23 - 98 0 0 19 16 2 4 20 57.0 10 114 -42 19 45 44 18 46 25 19 50 46 18 41 25 -0.23 - 97 0 0 18 54 18 4 20 53.6 11 114 -43 19 24 1 18 24 40 19 29 2 18 19 40 -0.23 - 96 0 0 18 32 27 4 20 49.9 12 114 -44 19 2 10 18 2 49 19 7 12 17 57 48 -0.24 - 95 0 0 18 10 30 4 20 45.9 13 115 -45 18 40 14 17 40 51 18 45 16 17 35 50 -0.24 - 94 0 0 17 48 27 4 20 41.6 14 115 -46 18 18 11 17 18 47 18 23 13 17 13 46 -0.24 - 93 0 0 17 26 18 4 20 36.9 16 115 -47 17 56 3 16 56 38 18 1 5 16 51 37 -0.24 - 92 0 0 17 4 5 4 20 32.0 17 115 -47 17 33 50 16 34 24 17 38 52 16 29 23 -0.24 - 91 0 0 16 41 47 4 20 26.7 18 116 -48 17 11 32 16 12 5 17 16 34 16 7 5 -0.24 - 90 0 0 16 19 25 4 20 21.2 19 116 -49 16 49 10 15 49 43 16 54 12 15 44 43 -0.24 - 89 0 0 15 56 59 4 20 15.3 20 116 -50 16 26 45 15 27 18 16 31 47 15 22 17 -0.24 - 88 0 0 15 34 31 4 20 9.1 21 117 -51 16 4 17 15 4 49 16 9 19 14 59 49 -0.24 - 87 0 0 15 12 0 4 20 2.7 22 117 -52 15 41 46 14 42 19 15 46 48 14 37 18 -0.25 - 86 0 0 14 49 27 4 19 55.9 23 117 -53 15 19 13 14 19 46 15 24 15 14 14 45 -0.25 - 85 0 0 14 26 53 4 19 48.8 24 118 -53 14 56 39 13 57 12 15 1 41 13 52 12 -0.25 - 84 0 0 14 4 18 4 19 41.5 25 118 -54 14 34 3 13 34 38 14 39 5 13 29 37 -0.25 - 83 0 0 13 41 43 4 19 33.8 26 118 -55 14 11 27 13 12 2 14 16 29 13 7 2 -0.25 - 82 0 0 13 19 7 4 19 25.9 27 118 -56 13 48 51 12 49 28 13 53 53 12 44 27 -0.25 - 81 0 0 12 56 32 4 19 17.6 28 119 -57 13 26 16 12 26 53 13 31 18 12 21 53 -0.25 - 80 0 0 12 33 59 4 19 9.1 29 119 -57 13 3 41 12 4 20 13 8 43 11 59 20 -0.25 - 79 0 0 12 11 26 4 19 0.3 30 119 -58 12 41 8 11 41 48 12 46 10 11 36 48 -0.25 - 78 0 0 11 48 56 4 18 51.3 31 119 -59 12 18 37 11 19 19 12 23 39 11 14 19 -0.25 - 77 0 0 11 26 28 4 18 41.9 32 120 -59 11 56 9 10 56 52 12 1 10 10 51 52 -0.25 - 76 0 0 11 4 3 4 18 32.3 33 120 -60 11 33 43 10 34 28 11 38 44 10 29 28 -0.25 - 75 0 0 10 41 42 4 18 22.4 34 120 -61 11 11 21 10 12 8 11 16 22 10 7 8 -0.25 - 74 0 0 10 19 24 4 18 12.3 35 121 -61 10 49 2 9 49 51 10 54 3 9 44 52 -0.25 - 73 0 0 9 57 11 4 18 1.9 36 121 -62 10 26 48 9 27 39 10 31 48 9 22 40 -0.25 - 72 0 0 9 35 3 4 17 51.3 37 121 -63 10 4 38 9 5 32 10 9 39 9 0 33 -0.25 - 71 0 0 9 13 0 4 17 40.4 38 121 -63 9 42 34 8 43 30 9 47 34 8 38 31 -0.25 - 70 0 0 8 51 3 4 17 29.3 39 122 -64 9 20 35 8 21 34 9 25 35 8 16 36 -0.25 - 69 0 0 8 29 12 4 17 17.9 40 122 -64 8 58 43 7 59 44 9 3 43 7 54 46 -0.25 - 68 0 0 8 7 27 4 17 6.3 41 122 -65 8 36 57 7 38 1 8 41 56 7 33 3 -0.25 - 67 0 0 7 45 49 4 16 54.5 42 123 -65 8 15 18 7 16 25 8 20 17 7 11 27 -0.25 - 66 0 0 7 24 19 4 16 42.4 43 123 -66 7 53 46 6 54 56 7 58 45 6 49 59 -0.25 - 65 0 0 7 2 57 4 16 30.2 43 123 -66 7 32 22 6 33 36 7 37 21 6 28 38 -0.25 - 64 0 0 6 41 43 4 16 17.7 44 124 -66 7 11 6 6 12 23 7 16 5 6 7 26 -0.25 - 63 0 0 6 20 38 4 16 5.0 45 124 -67 6 49 59 5 51 20 6 54 58 5 46 23 -0.25 - 62 0 0 5 59 41 4 15 52.1 46 124 -67 6 29 1 5 30 25 6 33 59 5 25 28 -0.25 - 61 0 0 5 38 54 4 15 39.0 47 125 -67 6 8 13 5 9 40 6 13 10 5 4 43 -0.24 - 60 0 0 5 18 17 4 15 25.8 48 125 -67 5 47 34 4 49 4 5 52 31 4 44 8 -0.24 - 59 0 0 4 57 50 4 15 12.3 49 125 -67 5 27 5 4 28 39 5 32 2 4 23 43 -0.24 - 58 0 0 4 37 33 4 14 58.7 50 126 -67 5 6 46 4 8 24 5 11 43 4 3 29 -0.24 - 57 0 0 4 17 27 4 14 44.9 51 126 -67 4 46 39 3 48 20 4 51 35 3 43 25 -0.24 - 56 0 0 3 57 33 4 14 30.9 52 127 -67 4 26 42 3 28 27 4 31 38 3 23 33 -0.24 - 55 0 0 3 37 50 4 14 16.7 53 127 -67 4 6 57 3 8 46 4 11 53 3 3 52 -0.24 - 54 0 0 3 18 18 4 14 2.5 54 128 -67 3 47 24 2 49 17 3 52 19 2 44 23 -0.24 - 53 0 0 2 58 59 4 13 48.0 55 128 -67 3 28 3 2 30 0 3 32 58 2 25 6 -0.24 - 52 0 0 2 39 53 4 13 33.4 56 129 -67 3 8 54 2 10 55 3 13 49 2 6 2 -0.24 - 51 0 0 2 20 59 4 13 18.7 57 129 -67 2 49 58 1 52 3 2 54 53 1 47 10 -0.24 - 50 0 0 2 2 18 4 13 3.8 58 130 -66 2 31 15 1 33 24 2 36 9 1 28 31 -0.24 - 49 0 0 1 43 50 4 12 48.8 59 130 -66 2 12 45 1 14 58 2 17 39 1 10 6 -0.24 - 48 0 0 1 25 36 4 12 33.7 60 131 -66 1 54 29 0 56 46 1 59 23 0 51 54 -0.24 - 47 0 0 1 7 36 4 12 18.5 61 132 -65 1 36 27 0 38 48 1 41 20 0 33 57 -0.24 - 46 0 0 0 49 50 4 12 3.2 61 133 -65 1 18 39 0 21 4 1 23 32 0 16 13 -0.24 - 45 0 0 0 32 18 4 11 47.7 62 133 -64 1 1 5 0 3 35 1 5 58 - 0 1 16 -0.24 - 44 0 0 0 15 1 4 11 32.2 63 134 -64 0 43 46 - 0 13 40 0 48 38 - 0 18 31 -0.24 - 43 0 0 - 0 2 1 4 11 16.5 64 135 -63 0 26 42 - 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7 24 48 - 8 29 20 -0.24 19 0 0 - 7 54 42 3 55 11.7 51 251 -13 - 7 27 5 - 8 22 17 - 7 22 24 - 8 26 56 -0.24 20 0 0 - 7 51 58 3 54 58.8 50 251 -12 - 7 24 19 - 8 19 33 - 7 19 39 - 8 24 13 -0.24 21 0 0 - 7 48 52 3 54 46.0 49 251 -11 - 7 21 13 - 8 16 28 - 7 16 33 - 8 21 8 -0.24 22 0 0 - 7 45 26 3 54 33.4 48 251 -10 - 7 17 47 - 8 13 3 - 7 13 6 - 8 17 43 -0.24 23 0 0 - 7 41 39 3 54 21.0 47 252 -9 - 7 13 59 - 8 9 17 - 7 9 18 - 8 13 57 -0.24 24 0 0 - 7 37 32 3 54 8.7 46 252 -8 - 7 9 51 - 8 5 10 - 7 5 9 - 8 9 50 -0.24 25 0 0 - 7 33 3 3 53 56.6 45 252 -8 - 7 5 21 - 8 0 42 - 7 0 40 - 8 5 22 -0.24 26 0 0 - 7 28 14 3 53 44.7 44 252 -7 - 7 0 31 - 7 55 54 - 6 55 49 - 8 0 34 -0.24 27 0 0 - 7 23 3 3 53 32.9 43 252 -6 - 6 55 19 - 7 50 44 - 6 50 38 - 7 55 25 -0.24 28 0 0 - 7 17 32 3 53 21.4 42 252 -5 - 6 49 47 - 7 45 14 - 6 45 5 - 7 49 55 -0.24 29 0 0 - 7 11 40 3 53 10.0 42 252 -4 - 6 43 54 - 7 39 23 - 6 39 12 - 7 44 4 -0.24 30 0 0 - 7 5 27 3 52 58.8 41 252 -3 - 6 37 40 - 7 33 11 - 6 32 58 - 7 37 52 -0.24 31 0 0 - 6 58 53 3 52 47.8 40 252 -2 - 6 31 5 - 7 26 38 - 6 26 22 - 7 31 19 -0.24 32 0 0 - 6 51 58 3 52 37.0 39 252 -1 - 6 24 8 - 7 19 45 - 6 19 26 - 7 24 26 -0.24 33 0 0 - 6 44 42 3 52 26.3 38 252 0 - 6 16 51 - 7 12 30 - 6 12 8 - 7 17 12 -0.24 34 0 0 - 6 37 6 3 52 15.9 37 252 1 - 6 9 13 - 7 4 55 - 6 4 30 - 7 9 37 -0.24 35 0 0 - 6 29 8 3 52 5.7 36 252 2 - 6 1 14 - 6 56 58 - 5 56 31 - 7 1 41 -0.24 36 0 0 - 6 20 49 3 51 55.7 35 252 3 - 5 52 54 - 6 48 41 - 5 48 10 - 6 53 24 -0.24 37 0 0 - 6 12 10 3 51 46.0 34 252 4 - 5 44 13 - 6 40 3 - 5 39 29 - 6 44 46 -0.24 38 0 0 - 6 3 9 3 51 36.4 33 252 5 - 5 35 11 - 6 31 5 - 5 30 27 - 6 35 48 -0.24 39 0 0 - 5 53 48 3 51 27.1 32 252 6 - 5 25 48 - 6 21 45 - 5 21 4 - 6 26 28 -0.24 40 0 0 - 5 44 6 3 51 17.9 31 252 7 - 5 16 4 - 6 12 5 - 5 11 20 - 6 16 48 -0.24 41 0 0 - 5 34 3 3 51 9.1 30 252 8 - 5 6 0 - 6 2 4 - 5 1 15 - 6 6 47 -0.24 42 0 0 - 5 23 40 3 51 0.4 29 252 9 - 4 55 34 - 5 51 42 - 4 50 49 - 5 56 26 -0.25 43 0 0 - 5 12 55 3 50 52.0 28 252 9 - 4 44 48 - 5 40 59 - 4 40 2 - 5 45 44 -0.25 44 0 0 - 5 1 50 3 50 43.8 27 252 10 - 4 33 41 - 5 29 56 - 4 28 55 - 5 34 41 -0.25 45 0 0 - 4 50 25 3 50 35.9 26 252 11 - 4 22 13 - 5 18 32 - 4 17 27 - 5 23 17 -0.25 46 0 0 - 4 38 38 3 50 28.2 25 252 12 - 4 10 25 - 5 6 48 - 4 5 38 - 5 11 33 -0.25 47 0 0 - 4 26 31 3 50 20.8 24 252 13 - 3 58 16 - 4 54 43 - 3 53 29 - 4 59 29 -0.25 48 0 0 - 4 14 4 3 50 13.6 23 252 14 - 3 45 47 - 4 42 18 - 3 40 59 - 4 47 4 -0.25 49 0 0 - 4 1 16 3 50 6.7 22 252 15 - 3 32 57 - 4 29 33 - 3 28 9 - 4 34 19 -0.25 50 0 0 - 3 48 8 3 50 0.1 21 252 16 - 3 19 47 - 4 16 27 - 3 14 59 - 4 21 13 -0.25 51 0 0 - 3 34 40 3 49 53.7 20 252 17 - 3 6 16 - 4 3 1 - 3 1 28 - 4 7 48 -0.25 52 0 0 - 3 20 52 3 49 47.6 19 252 18 - 2 52 26 - 3 49 15 - 2 47 37 - 3 54 2 -0.25 53 0 0 - 3 6 43 3 49 41.8 18 252 19 - 2 38 15 - 3 35 8 - 2 33 26 - 3 39 56 -0.25 54 0 0 - 2 52 15 3 49 36.3 17 252 20 - 2 23 44 - 3 20 42 - 2 18 55 - 3 25 31 -0.25 55 0 0 - 2 37 27 3 49 31.1 16 252 21 - 2 8 54 - 3 5 57 - 2 4 4 - 3 10 45 -0.25 56 0 0 - 2 22 19 3 49 26.1 15 252 22 - 1 53 44 - 2 50 51 - 1 48 53 - 2 55 40 -0.25 57 0 0 - 2 6 52 3 49 21.4 14 252 23 - 1 38 14 - 2 35 26 - 1 33 23 - 2 40 16 -0.25 58 0 0 - 1 51 5 3 49 17.1 13 252 24 - 1 22 25 - 2 19 42 - 1 17 34 - 2 24 32 -0.25 59 0 0 - 1 34 59 3 49 13.0 12 252 25 - 1 6 16 - 2 3 38 - 1 1 25 - 2 8 29 -0.25 60 0 0 - 1 18 34 3 49 9.3 11 252 26 - 0 49 49 - 1 47 16 - 0 44 57 - 1 52 6 -0.25 61 0 0 - 1 1 50 3 49 5.8 10 252 27 - 0 33 2 - 1 30 34 - 0 28 10 - 1 35 25 -0.26 62 0 0 - 0 44 47 3 49 2.7 9 252 28 - 0 15 57 - 1 13 34 - 0 11 4 - 1 18 26 -0.26 63 0 0 - 0 27 26 3 48 59.9 8 252 29 0 1 27 - 0 56 15 0 6 20 - 1 1 7 -0.26 64 0 0 - 0 9 47 3 48 57.4 7 252 30 0 19 9 - 0 38 38 0 24 2 - 0 43 31 -0.26 65 0 0 0 8 11 3 48 55.2 6 252 32 0 37 9 - 0 20 43 0 42 3 - 0 25 36 -0.26 66 0 0 0 26 26 3 48 53.4 5 252 33 0 55 26 - 0 2 30 1 0 21 - 0 7 24 -0.26 67 0 0 0 44 59 3 48 51.9 4 252 34 1 14 2 0 16 0 1 18 57 0 11 6 -0.26 68 0 0 1 3 49 3 48 50.7 3 252 35 1 32 55 0 34 48 1 37 50 0 29 54 -0.26 69 0 0 1 22 57 3 48 49.9 2 252 36 1 52 5 0 53 53 1 57 1 0 48 58 -0.27 70 0 0 1 42 21 3 48 49.4 1 252 37 2 11 31 1 13 14 2 16 28 1 8 20 -0.28 71 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 1 32 53 .. .. .. 1 27 57 .... Uncertainty in time = +/- 4 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6252-02422-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 36 40.6552 DE: -18 07 32.882 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 36 40.6554 DE: -18 07 32.882 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (206) Hersilia asteroid class: approx. diameter [km]: 99 approx. diameter ["]: 0.069 distance from Earth [AU]: 1.97890 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#119 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): 0.018", 0.005", 91.031° remarks: * orbital elements for (206)Hersilia : Mean anomaly = 163.0278725762 deg Arg. of pericenter = 302.6045946168 deg Long. of node = 145.0335662710 deg Inclination = 3.7797556723 deg Eccentricity = 0.0395953011 Semimajor axis = 2.7406461848 AU Perihelion dist = 2.6321294739 AU Mag: H = 8.82, G = 0.15 Epoch of elements : MJD 60072.17013889 TDT (2023 May 08.1701) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1192023Apr24,15.50,2023,5,8,4.084034,0.042840,0.222514,-3.538861,0.687343,-0.003444,-0.000270,0.000001,0.000000 -22.4817,-18.1411,117.88,17.01,False TYC 6252-02422-1,17.61129310,-18.1258006,0.00,10.52,0.00,0.0,0,,17.63415846,-18.1410595,2.90,0.00,0,0,0 206,Hersilia,13.34,99.0,1.9789,0,0,-1.103,3.06,,5.2,0 0,162.9909,2023,5,8,302.6046,145.0336,3.7798,0.03960,2.74065,2.63213,8.84,5.0,0.15 1.085,0.0180,0.0050,91,0.0058,Known errors,-1.00,-1,-1,-1 20230508_2422-1,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org