IOTA/IOTA-ES occultation update for (100) Hekate / TYC 1320-01670-1 event on 2023 Jan 31, 14:03 UT Visible from China, India Summary ------- On 2023 Jan 31 UT, the 87.8 km diameter asteroid (100) Hekate will occult a 9.7 mag star in the constellation Orion for observers along a path across China, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.65 mag to 13.33 mag (the magnitude of the asteroid) for at most 10.790 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: 2023 Jan 31, 13:50 - 2023 Jan 31, 14:17 * geocentric midpoint of event [JD]: 2459976.08614421 * magnitude of target star: 9.72 * magnitude drop [mag]: 3.65 * estimated maximum duration [s]: 10.790 * Moon: 78 % sunlit, 15° distance * Sun: 137° distance * rough path description: China, India Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 88 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 4.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.001", 84°) * approx speed of asteroid's shadow [km/s]: 8.1348 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1320-01670-1 by 100 Hekate on 2023 Jan 31 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 7 0 0 19 55 23 14 17 6.2 0 69 37 20 20 50 19 29 57 20 30 48 19 19 59 .... 8 0 0 20 16 37 14 17 6.0 1 70 36 20 42 1 19 51 14 20 51 57 19 41 18 -0.10 9 0 0 20 37 27 14 17 5.5 2 70 36 21 2 47 20 12 7 21 12 42 20 2 12 -0.07 10 0 0 20 57 52 14 17 4.8 3 70 35 21 23 8 20 32 35 21 33 3 20 22 41 -0.05 11 0 0 21 17 51 14 17 3.9 4 71 34 21 43 5 20 52 38 21 52 58 20 42 45 -0.05 12 0 0 21 37 26 14 17 2.7 5 71 33 22 2 37 21 12 16 22 12 29 21 2 25 -0.04 13 0 0 21 56 36 14 17 1.4 6 71 32 22 21 44 21 31 29 22 31 34 21 21 39 -0.04 14 0 0 22 15 21 14 16 59.8 7 72 31 22 40 26 21 50 17 22 50 15 21 40 28 -0.04 15 0 0 22 33 41 14 16 57.9 8 72 30 22 58 42 22 8 40 23 8 30 21 58 52 -0.03 16 0 0 22 51 36 14 16 55.9 9 73 29 23 16 34 22 26 38 23 26 21 22 16 51 -0.03 17 0 0 23 9 5 14 16 53.7 10 73 28 23 34 0 22 44 10 23 43 46 22 34 25 -0.03 18 0 0 23 26 9 14 16 51.3 11 73 27 23 51 2 23 1 17 24 0 46 22 51 33 -0.03 19 0 0 23 42 48 14 16 48.6 12 74 26 24 7 38 23 17 59 24 17 21 23 8 16 -0.03 20 0 0 23 59 2 14 16 45.8 13 74 25 24 23 49 23 34 16 24 33 31 23 24 34 -0.03 21 0 0 24 14 51 14 16 42.8 14 75 25 24 39 35 23 50 7 24 49 16 23 40 26 -0.03 22 0 0 24 30 14 14 16 39.6 15 75 24 24 54 56 24 5 34 25 4 36 23 55 54 -0.03 23 0 0 24 45 13 14 16 36.2 16 75 23 25 9 51 24 20 35 25 19 30 24 10 56 -0.03 24 0 0 24 59 46 14 16 32.6 17 76 22 25 24 22 24 35 10 25 34 0 24 25 33 -0.03 25 0 0 25 13 54 14 16 28.9 18 76 21 25 38 27 24 49 21 25 48 4 24 39 44 -0.03 26 0 0 25 27 37 14 16 24.9 19 77 20 25 52 8 25 3 7 26 1 44 24 53 31 -0.03 27 0 0 25 40 55 14 16 20.8 20 77 19 26 5 23 25 16 27 26 14 58 25 6 53 -0.03 28 0 0 25 53 48 14 16 16.5 20 77 18 26 18 14 25 29 23 26 27 48 25 19 49 -0.03 29 0 0 26 6 17 14 16 12.1 21 78 18 26 30 40 25 41 53 26 40 13 25 32 20 -0.03 30 0 0 26 18 20 14 16 7.5 22 78 17 26 42 41 25 53 59 26 52 13 25 44 27 -0.03 31 0 0 26 29 58 14 16 2.7 23 79 16 26 54 17 26 5 40 27 3 49 25 56 9 -0.03 32 0 0 26 41 12 14 15 57.8 24 79 15 27 5 29 26 16 56 27 15 0 26 7 25 -0.03 33 0 0 26 52 1 14 15 52.7 25 80 14 27 16 16 26 27 47 27 25 46 26 18 17 -0.03 34 0 0 27 2 26 14 15 47.5 26 80 13 27 26 39 26 38 13 27 36 8 26 28 45 -0.03 35 0 0 27 12 26 14 15 42.1 27 81 12 27 36 37 26 48 15 27 46 5 26 38 47 -0.03 36 0 0 27 22 2 14 15 36.6 28 81 12 27 46 11 26 57 53 27 55 38 26 48 26 -0.03 37 0 0 27 31 13 14 15 30.9 28 81 11 27 55 20 27 7 6 28 4 47 26 57 39 -0.03 38 0 0 27 39 59 14 15 25.1 29 82 10 28 4 5 27 15 54 28 13 31 27 6 28 -0.03 39 0 0 27 48 22 14 15 19.1 30 82 9 28 12 26 27 24 18 28 21 51 27 14 53 -0.03 40 0 0 27 56 20 14 15 13.0 31 83 8 28 20 23 27 32 18 28 29 48 27 22 54 -0.03 41 0 0 28 3 55 14 15 6.8 32 83 7 28 27 55 27 39 54 28 37 20 27 30 30 -0.03 42 0 0 28 11 5 14 15 0.4 33 84 7 28 35 4 27 47 6 28 44 28 27 37 42 -0.04 43 0 0 28 17 51 14 14 53.9 34 84 6 28 41 49 27 53 53 28 51 12 27 44 30 -0.04 44 0 0 28 24 13 14 14 47.3 35 85 5 28 48 10 28 0 17 28 57 33 27 50 54 -0.04 45 0 0 28 30 11 14 14 40.5 35 85 4 28 54 7 28 6 16 29 3 29 27 56 54 -0.04 46 0 0 28 35 46 14 14 33.6 36 86 3 28 59 41 28 11 52 29 9 2 28 2 30 -0.04 47 0 0 28 40 57 14 14 26.6 37 86 2 29 4 50 28 17 4 29 14 12 28 7 42 -0.04 48 0 0 28 45 44 14 14 19.4 38 87 2 29 9 37 28 21 52 29 18 58 28 12 31 -0.04 49 0 0 28 50 7 14 14 12.1 39 87 1 29 13 59 28 26 16 29 23 20 28 16 56 -0.04 50 0 0 28 54 7 14 14 4.7 40 88 0 29 17 58 28 30 17 29 27 19 28 20 57 -0.04 51 0 0 28 57 44 14 13 57.2 41 88 -1 29 21 34 28 33 54 29 30 54 28 24 34 -0.04 52 0 0 29 0 57 14 13 49.6 41 89 -2 29 24 46 28 37 8 29 34 6 28 27 48 -0.04 53 0 0 29 3 46 14 13 41.8 42 89 -2 29 27 36 28 39 58 29 36 55 28 30 38 -0.04 54 0 0 29 6 13 14 13 34.0 43 90 -3 29 30 1 28 42 24 29 39 21 28 33 5 -0.04 55 0 0 29 8 16 14 13 26.0 44 90 -4 29 32 4 28 44 28 29 41 23 28 35 9 -0.04 56 0 0 29 9 55 14 13 17.9 45 91 -5 29 33 43 28 46 8 29 43 2 28 36 49 -0.04 57 0 0 29 11 12 14 13 9.7 46 91 -6 29 34 59 28 47 25 29 44 19 28 38 6 -0.04 58 0 0 29 12 5 14 13 1.4 46 92 -7 29 35 53 28 48 18 29 45 12 28 38 59 -0.04 59 0 0 29 12 35 14 12 52.9 47 92 -7 29 36 23 28 48 48 29 45 42 28 39 30 -0.04 60 0 0 29 12 42 14 12 44.4 48 93 -8 29 36 30 28 48 55 29 45 49 28 39 37 -0.04 61 0 0 29 12 26 14 12 35.7 49 93 -9 29 36 14 28 48 39 29 45 33 28 39 20 -0.04 62 0 0 29 11 47 14 12 27.0 50 94 -10 29 35 35 28 48 0 29 44 54 28 38 41 -0.04 63 0 0 29 10 45 14 12 18.1 51 94 -11 29 34 33 28 46 58 29 43 52 28 37 39 -0.04 64 0 0 29 9 20 14 12 9.1 51 95 -11 29 33 8 28 45 32 29 42 27 28 36 13 -0.04 65 0 0 29 7 32 14 12 0.0 52 95 -12 29 31 20 28 43 44 29 40 40 28 34 25 -0.04 66 0 0 29 5 21 14 11 50.9 53 96 -13 29 29 10 28 41 32 29 38 30 28 32 13 -0.04 67 0 0 29 2 47 14 11 41.6 54 96 -14 29 26 37 28 38 58 29 35 56 28 29 39 -0.04 68 0 0 28 59 50 14 11 32.2 55 97 -15 29 23 40 28 36 1 29 33 0 28 26 41 -0.04 69 0 0 28 56 31 14 11 22.7 56 97 -15 29 20 21 28 32 40 29 29 42 28 23 20 -0.04 70 0 0 28 52 48 14 11 13.1 57 98 -16 29 16 40 28 28 57 29 26 0 28 19 37 -0.04 71 0 0 28 48 43 14 11 3.4 57 98 -17 29 12 35 28 24 51 29 21 56 28 15 30 -0.04 72 0 0 28 44 15 14 10 53.6 58 99 -18 29 8 8 28 20 22 29 17 29 28 11 1 -0.04 73 0 0 28 39 24 14 10 43.7 59 100 -19 29 3 18 28 15 30 29 12 39 28 6 8 -0.04 74 0 0 28 34 10 14 10 33.7 60 100 -20 28 58 5 28 10 15 29 7 27 28 0 53 -0.04 75 0 0 28 28 33 14 10 23.6 61 101 -20 28 52 29 28 4 37 29 1 52 27 55 15 -0.04 76 0 0 28 22 34 14 10 13.4 62 101 -21 28 46 31 27 58 37 28 55 54 27 49 14 -0.04 77 0 0 28 16 11 14 10 3.2 62 102 -22 28 40 10 27 52 13 28 49 33 27 42 50 -0.04 78 0 0 28 9 26 14 9 52.8 63 102 -23 28 33 26 27 45 27 28 42 50 27 36 3 -0.04 79 0 0 28 2 19 14 9 42.3 64 103 -24 28 26 20 27 38 18 28 35 44 27 28 54 -0.04 80 0 0 27 54 48 14 9 31.7 65 104 -24 28 18 51 27 30 46 28 28 16 27 21 21 -0.04 81 0 0 27 46 55 14 9 21.1 66 104 -25 28 10 59 27 22 51 28 20 24 27 13 26 -0.04 82 0 0 27 38 39 14 9 10.3 67 105 -26 28 2 44 27 14 33 28 12 10 27 5 7 -0.04 83 0 0 27 30 0 14 8 59.5 68 105 -27 27 54 7 27 5 53 28 3 34 26 56 26 -0.04 84 0 0 27 20 58 14 8 48.5 68 106 -28 27 45 7 26 56 50 27 54 34 26 47 22 -0.04 85 0 0 27 11 34 14 8 37.5 69 107 -29 27 35 44 26 47 24 27 45 13 26 37 56 -0.04 86 0 0 27 1 47 14 8 26.4 70 107 -29 27 25 59 26 37 35 27 35 28 26 28 6 -0.04 87 0 0 26 51 37 14 8 15.2 71 108 -30 27 15 51 26 27 23 27 25 21 26 17 54 -0.04 88 0 0 26 41 4 14 8 3.9 72 109 -31 27 5 21 26 16 49 27 14 51 26 7 19 -0.04 89 0 0 26 30 9 14 7 52.5 73 110 -32 26 54 27 26 5 52 27 3 58 25 56 21 -0.04 90 0 0 26 18 51 14 7 41.1 74 110 -33 26 43 11 25 54 32 26 52 43 25 45 0 -0.04 91 0 0 26 7 11 14 7 29.6 74 111 -34 26 31 33 25 42 49 26 41 6 25 33 17 -0.04 92 0 0 25 55 8 14 7 17.9 75 112 -34 26 19 32 25 30 44 26 29 5 25 21 11 -0.04 93 0 0 25 42 42 14 7 6.2 76 113 -35 26 7 8 25 18 16 26 16 43 25 8 42 -0.04 94 0 0 25 29 54 14 6 54.5 77 114 -36 25 54 22 25 5 26 26 3 57 24 55 51 -0.04 95 0 0 25 16 43 14 6 42.6 78 115 -37 25 41 14 24 52 13 25 50 50 24 42 37 -0.04 96 0 0 25 3 10 14 6 30.7 79 117 -38 25 27 42 24 38 37 25 37 19 24 29 1 -0.04 97 0 0 24 49 14 14 6 18.7 80 118 -39 25 13 49 24 24 39 25 23 27 24 15 2 -0.04 98 0 0 24 34 56 14 6 6.6 80 120 -39 24 59 33 24 10 19 25 9 12 24 0 40 -0.04 99 0 0 24 20 15 14 5 54.4 81 122 -40 24 44 55 23 55 36 24 54 34 23 45 56 -0.04 100 0 0 24 5 12 14 5 42.2 82 124 -41 24 29 54 23 40 30 24 39 35 23 30 50 -0.04 101 0 0 23 49 47 14 5 29.9 83 126 -42 24 14 31 23 25 3 24 24 13 23 15 22 -0.04 102 0 0 23 33 59 14 5 17.6 84 130 -43 23 58 46 23 9 13 24 8 29 22 59 31 -0.04 103 0 0 23 17 50 14 5 5.2 85 134 -44 23 42 39 22 53 1 23 52 23 22 43 18 -0.04 104 0 0 23 1 18 14 4 52.7 85 140 -45 23 26 10 22 36 27 23 35 54 22 26 43 -0.04 105 0 0 22 44 25 14 4 40.1 86 148 -45 23 9 19 22 19 31 23 19 4 22 9 46 -0.05 106 0 0 22 27 9 14 4 27.6 87 160 -46 22 52 6 22 2 13 23 1 53 21 52 27 -0.05 107 0 0 22 9 32 14 4 14.9 87 178 -47 22 34 32 21 44 33 22 44 19 21 34 46 -0.05 108 0 0 21 51 33 14 4 2.2 87 200 -48 22 16 35 21 26 32 22 26 24 21 16 44 -0.05 109 0 0 21 33 13 14 3 49.5 87 222 -49 21 58 18 21 8 9 22 8 7 20 58 20 -0.05 110 0 0 21 14 31 14 3 36.7 87 239 -50 21 39 39 20 49 25 21 49 29 20 39 35 -0.05 111 0 0 20 55 28 14 3 23.9 86 251 -51 21 20 38 20 30 19 21 30 29 20 20 28 -0.04 112 0 0 20 36 4 14 3 11.0 85 259 -52 21 1 17 20 10 53 21 11 9 20 1 1 -0.04 113 0 0 20 16 19 14 2 58.1 84 265 -52 20 41 34 19 51 5 20 51 27 19 41 12 -0.04 114 0 0 19 56 14 14 2 45.2 84 269 -53 20 21 31 19 30 57 20 31 25 19 21 3 -0.04 115 0 0 19 35 47 14 2 32.2 83 272 -54 20 1 7 19 10 28 20 11 2 19 0 33 -0.04 116 0 0 19 15 0 14 2 19.2 82 274 -55 19 40 23 18 49 38 19 50 19 18 39 42 -0.04 117 0 0 18 53 53 14 2 6.2 81 277 -56 19 19 18 18 28 29 19 29 16 18 18 32 -0.04 118 0 0 18 32 26 14 1 53.2 80 278 -57 18 57 54 18 6 59 19 7 52 17 57 1 -0.04 119 0 0 18 10 40 14 1 40.2 79 280 -58 18 36 10 17 45 10 18 46 9 17 35 11 -0.04 120 0 0 17 48 33 14 1 27.1 78 281 -59 18 14 6 17 23 1 18 24 6 17 13 1 -0.04 121 0 0 17 26 8 14 1 14.0 77 282 -59 17 51 43 17 0 33 18 1 44 16 50 32 -0.04 122 0 0 17 3 23 14 1 1.0 76 283 -60 17 29 1 16 37 46 17 39 3 16 27 44 -0.04 123 0 0 16 40 20 14 0 47.9 75 284 -61 17 6 0 16 14 40 17 16 3 16 4 37 -0.04 124 0 0 16 16 58 14 0 34.9 74 285 -62 16 42 41 15 51 16 16 52 45 15 41 12 -0.04 125 0 0 15 53 18 14 0 21.9 73 286 -63 16 19 3 15 27 34 16 29 8 15 17 29 -0.04 126 0 0 15 29 21 14 0 8.9 72 286 -64 15 55 8 15 3 34 16 5 14 14 53 28 -0.03 127 0 0 15 5 5 13 59 55.9 71 287 -65 15 30 55 14 39 16 15 41 2 14 29 10 -0.03 128 0 0 14 40 33 13 59 42.9 70 288 -65 15 6 25 14 14 42 15 16 33 14 4 35 -0.03 129 0 0 14 15 44 13 59 30.0 69 288 -66 14 41 38 13 49 51 14 51 47 13 39 42 -0.03 130 0 0 13 50 39 13 59 17.1 68 289 -67 14 16 35 13 24 43 14 26 44 13 14 34 -0.03 131 0 0 13 25 18 13 59 4.3 67 289 -68 13 51 16 12 59 20 14 1 26 12 49 10 -0.03 132 0 0 12 59 41 13 58 51.5 66 290 -69 13 25 41 12 33 41 13 35 52 12 23 30 -0.03 133 0 0 12 33 48 13 58 38.8 65 290 -69 12 59 51 12 7 47 13 10 3 11 57 35 -0.03 134 0 0 12 7 42 13 58 26.1 64 290 -70 12 33 46 11 41 38 12 43 59 11 31 26 -0.03 135 0 0 11 41 21 13 58 13.5 63 291 -71 12 7 27 11 15 15 12 17 40 11 5 2 -0.03 136 0 0 11 14 46 13 58 0.9 62 291 -72 11 40 54 10 48 38 11 51 8 10 38 24 -0.03 137 0 0 10 47 58 13 57 48.5 61 291 -72 11 14 8 10 21 48 11 24 22 10 11 34 -0.03 138 0 0 10 20 57 13 57 36.1 60 292 -73 10 47 8 9 54 46 10 57 24 9 44 31 -0.03 139 0 0 9 53 44 13 57 23.8 59 292 -74 10 19 57 9 27 31 10 30 13 9 17 15 -0.03 140 0 0 9 26 19 13 57 11.7 58 292 -74 9 52 33 9 0 4 10 2 50 8 49 48 -0.03 141 0 0 8 58 42 13 56 59.6 57 292 -75 9 24 59 8 32 27 9 35 16 8 22 10 -0.03 142 0 0 8 30 56 13 56 47.6 56 293 -75 8 57 13 8 4 38 9 7 31 7 54 21 -0.03 143 0 0 8 2 59 13 56 35.8 55 293 -76 8 29 17 7 36 40 8 39 36 7 26 22 -0.03 144 0 0 7 34 52 13 56 24.0 54 293 -76 8 1 12 7 8 32 8 11 31 6 58 14 -0.03 145 0 0 7 6 37 13 56 12.4 53 293 -76 7 32 58 6 40 16 7 43 17 6 29 57 -0.03 146 0 0 6 38 13 13 56 1.0 52 294 -76 7 4 35 6 11 51 7 14 55 6 1 31 -0.03 147 0 0 6 9 42 13 55 49.6 51 294 -77 6 36 5 5 43 18 6 46 25 5 32 59 -0.03 148 0 0 5 41 3 13 55 38.4 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Uncertainty in time = +/- 5 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: TYC 1320-01670-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 53 25.2577 DE: +19 33 25.336 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 53 25.2576 DE: +19 33 25.336 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (100) Hekate asteroid class: approx. diameter [km]: 88 approx. diameter ["]: 0.045 distance from Earth [AU]: 2.71510 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2022 Nov 22 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): 0.021", 0.001", 83.95° remarks: * orbital elements for (100)Hekate : Mean anomaly = 137.0071216958 deg Arg. of pericenter = 183.7812467563 deg Long. of node = 127.1711883969 deg Inclination = 6.4330000260 deg Eccentricity = 0.1687509315 Semimajor axis = 3.0872857741 AU Perihelion dist = 2.5663034239 AU Mag: H = 7.71, G = 0.15 Epoch of elements : MJD 59975.58604167 TDT (2023 Jan 31.5860) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552022Nov22,10.79,2023,1,31,14.067461,0.012959,0.038044,-4.351624,1.464699,0.004117,0.000335,0.000001,0.000000 107.1504,19.5620,-27.66,-17.35,False TYC 1320-01670-1,5.89034936,19.5570378,0.00,9.72,0.00,0.0,0,,5.91322968,19.5620470,3.65,0.00,0,0,0 100,Hekate,13.33,87.8,2.7151,0,0,-0.996,4.74,,4.8,0 0,136.9006,2023,1,31,183.7812,127.1712,6.4330,0.16875,3.08729,2.56630,7.75,5.0,0.15 1.196,0.0207,0.0015,84,0.0087,Known errors,-1.00,-1,-1,-1 20230131_1670-1,59914.10 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org