IOTA/IOTA-ES occultation update for (117) Lomia / TYC 2899-01763-1 event on 2023 Feb 17, 15:39 UT Visible from Russia, China, India, Indonesia Summary ------- On 2023 Feb 17 UT, the 158.1 km diameter asteroid (117) Lomia will occult a 10.8 mag star in the constellation Auriga for observers along a path across Russia, China, India, Indonesia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.69 mag to 13.37 mag (the magnitude of the asteroid) for at most 15.650 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 Feb 17, 15:29 - 2023 Feb 17, 15:49 * geocentric midpoint of event [JD]: 2459993.15245716 * magnitude of target star: 10.78 * magnitude drop [mag]: 2.69 * estimated maximum duration [s]: 15.650 * Moon: 11 % sunlit, 147° distance * Sun: 109° distance * rough path description: Russia, China, India, Indonesia The occultation path -------------------- * approximate projected width [km]: 164 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.017) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.017", 82°) * approx speed of asteroid's shadow [km/s]: 10.1022 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2899-01763-1 by 117 Lomia on 2023 Feb 17 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 - 85 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 43 42 23 .. .. .. 44 28 37 .... - 84 0 0 43 28 45 15 29 24.5 1 30 26 .. .. .. 45 0 26 .. .. .. 45 46 18 .... - 83 0 0 44 45 4 15 29 24.9 2 30 26 43 15 31 46 15 59 42 31 46 47 1 28 -0.28 - 82 0 0 45 58 56 15 29 25.8 4 31 25 44 30 11 47 29 1 43 46 48 48 14 4 -0.29 - 81 0 0 47 10 19 15 29 27.0 5 32 24 45 42 26 48 39 31 44 59 27 49 24 6 -0.30 - 80 0 0 48 19 14 15 29 28.5 6 33 24 46 52 15 49 47 28 46 9 42 50 31 33 -0.30 - 79 0 0 49 25 41 15 29 30.3 8 33 23 47 59 40 50 52 54 47 17 34 51 36 28 -0.30 - 78 0 0 50 29 41 15 29 32.4 9 34 23 49 4 40 51 55 51 48 23 3 52 38 53 -0.30 - 77 0 0 51 31 16 15 29 34.7 10 35 22 50 7 17 52 56 21 49 26 10 53 38 49 -0.30 - 76 0 0 52 30 28 15 29 37.2 11 36 22 51 7 33 53 54 26 50 26 57 54 36 20 -0.30 - 75 0 0 53 27 21 15 29 39.9 12 37 21 52 5 32 54 50 11 51 25 27 55 31 29 -0.30 - 74 0 0 54 21 58 15 29 42.7 13 37 21 53 1 15 55 43 38 52 21 41 56 24 22 -0.30 - 73 0 0 55 14 22 15 29 45.6 14 38 20 53 54 46 56 34 53 53 15 45 57 15 1 -0.30 - 72 0 0 56 4 38 15 29 48.6 15 39 19 54 46 9 57 23 59 54 7 40 58 3 31 -0.30 - 71 0 0 56 52 49 15 29 51.7 16 40 19 55 35 27 58 11 0 54 57 31 58 49 57 -0.30 - 70 0 0 57 39 0 15 29 54.9 17 41 18 56 22 46 58 56 2 55 45 22 59 34 24 -0.30 - 69 0 0 58 23 16 15 29 58.1 18 42 18 57 8 8 59 39 9 56 31 16 60 16 56 -0.30 - 68 0 0 59 5 40 15 30 1.4 19 43 17 57 51 38 60 20 25 57 15 18 60 57 37 -0.30 - 67 0 0 59 46 17 15 30 4.6 20 44 17 58 33 20 60 59 55 57 57 32 61 36 33 -0.30 - 66 0 0 60 25 11 15 30 8.0 21 44 17 59 13 19 61 37 43 58 38 1 62 13 48 -0.30 - 65 0 0 61 2 27 15 30 11.3 22 45 16 59 51 38 62 13 53 59 16 51 62 49 25 -0.29 - 64 0 0 61 38 8 15 30 14.6 22 46 16 60 28 21 62 48 31 59 54 4 63 23 31 -0.29 - 63 0 0 62 12 19 15 30 17.9 23 47 15 61 3 32 63 21 40 60 29 45 63 56 8 -0.29 - 62 0 0 62 45 4 15 30 21.2 24 48 15 61 37 16 63 53 23 61 3 58 64 27 21 -0.29 - 61 0 0 63 16 25 15 30 24.5 24 49 14 62 9 36 64 23 45 61 36 45 64 57 13 -0.29 - 60 0 0 63 46 27 15 30 27.7 25 50 14 62 40 35 64 52 49 62 8 12 65 25 48 -0.29 - 59 0 0 64 15 14 15 30 31.0 26 51 14 63 10 16 65 20 40 62 38 20 65 53 10 -0.29 - 58 0 0 64 42 48 15 30 34.2 26 52 13 63 38 44 65 47 19 63 7 14 66 19 22 -0.29 - 57 0 0 65 9 13 15 30 37.4 27 53 13 64 6 2 66 12 51 63 34 57 66 44 26 -0.29 - 56 0 0 65 34 32 15 30 40.6 28 54 12 64 32 11 66 37 18 64 1 31 67 8 28 -0.29 - 55 0 0 65 58 48 15 30 43.7 28 55 12 64 57 16 67 0 43 64 27 0 67 31 28 -0.29 - 54 0 0 66 22 3 15 30 46.8 29 56 12 65 21 19 67 23 9 64 51 26 67 53 30 -0.29 - 53 0 0 66 44 20 15 30 49.8 29 57 11 65 44 22 67 44 39 65 14 53 68 14 36 -0.29 - 52 0 0 67 5 42 15 30 52.9 30 58 11 66 6 29 68 5 16 65 37 21 68 34 49 -0.29 - 51 0 0 67 26 11 15 30 55.9 30 59 11 66 27 41 68 25 0 65 58 55 68 54 12 -0.29 - 50 0 0 67 45 49 15 30 58.8 31 60 10 66 48 2 68 43 55 66 19 35 69 12 45 -0.29 - 49 0 0 68 4 38 15 31 1.8 31 61 10 67 7 32 69 2 3 66 39 25 69 30 33 -0.29 - 48 0 0 68 22 41 15 31 4.7 32 62 10 67 26 14 69 19 26 66 58 27 69 47 35 -0.29 - 47 0 0 68 39 59 15 31 7.6 32 63 9 67 44 10 69 36 5 67 16 41 70 3 56 -0.29 - 46 0 0 68 56 34 15 31 10.4 33 64 9 68 1 22 69 52 3 67 34 11 70 19 35 -0.29 - 45 0 0 69 12 28 15 31 13.2 33 65 9 68 17 51 70 7 21 67 50 58 70 34 35 -0.29 - 44 0 0 69 27 42 15 31 16.0 34 66 9 68 33 40 70 22 1 68 7 3 70 48 57 -0.29 - 43 0 0 69 42 19 15 31 18.7 34 67 8 68 48 49 70 36 4 68 22 29 71 2 43 -0.29 - 42 0 0 69 56 19 15 31 21.4 34 68 8 69 3 21 70 49 32 68 37 16 71 15 55 -0.29 - 41 0 0 70 9 43 15 31 24.1 35 69 8 69 17 16 71 2 25 68 51 26 71 28 33 -0.28 - 40 0 0 70 22 34 15 31 26.8 35 70 8 69 30 36 71 14 46 69 5 1 71 40 39 -0.28 - 39 0 0 70 34 52 15 31 29.4 36 71 7 69 43 23 71 26 35 69 18 2 71 52 14 -0.28 - 38 0 0 70 46 39 15 31 32.0 36 72 7 69 55 37 71 37 55 69 30 29 72 3 19 -0.28 - 37 0 0 70 57 55 15 31 34.6 36 73 7 70 7 20 71 48 44 69 42 25 72 13 56 -0.28 - 36 0 0 71 8 42 15 31 37.2 37 74 7 70 18 32 71 59 6 69 53 49 72 24 4 -0.28 - 35 0 0 71 19 1 15 31 39.7 37 75 6 70 29 15 72 9 0 70 4 44 72 33 46 -0.28 - 34 0 0 71 28 52 15 31 42.3 37 76 6 70 39 29 72 18 28 70 15 10 72 43 2 -0.28 - 33 0 0 71 38 17 15 31 44.8 38 77 6 70 49 16 72 27 30 70 25 8 72 51 53 -0.28 - 32 0 0 71 47 16 15 31 47.2 38 78 6 70 58 37 72 36 7 70 34 38 73 0 20 -0.28 - 31 0 0 71 55 50 15 31 49.7 38 79 5 71 7 31 72 44 20 70 43 43 73 8 23 -0.28 - 30 0 0 72 4 0 15 31 52.2 39 80 5 71 16 0 72 52 11 70 52 22 73 16 3 -0.28 - 29 0 0 72 11 46 15 31 54.6 39 81 5 71 24 5 72 59 38 71 0 36 73 23 21 -0.28 - 28 0 0 72 19 10 15 31 57.0 39 82 5 71 31 47 73 6 44 71 8 26 73 30 18 -0.28 - 27 0 0 72 26 11 15 31 59.4 40 83 4 71 39 5 73 13 28 71 15 52 73 36 54 -0.28 - 26 0 0 72 32 50 15 32 1.8 40 84 4 71 46 0 73 19 51 71 22 56 73 43 9 -0.28 - 25 0 0 72 39 9 15 32 4.2 40 85 4 71 52 34 73 25 54 71 29 37 73 49 4 -0.28 - 24 0 0 72 45 7 15 32 6.5 41 86 4 71 58 46 73 31 37 71 35 57 73 54 40 -0.28 - 23 0 0 72 50 44 15 32 8.9 41 87 4 72 4 38 73 37 1 71 41 55 73 59 57 -0.28 - 22 0 0 72 56 2 15 32 11.3 41 88 3 72 10 9 73 42 6 71 47 32 74 4 55 -0.28 - 21 0 0 73 1 1 15 32 13.6 42 89 3 72 15 20 73 46 52 71 52 49 74 9 36 -0.28 - 20 0 0 73 5 41 15 32 15.9 42 90 3 72 20 11 73 51 21 71 57 46 74 13 58 -0.28 - 19 0 0 73 10 2 15 32 18.3 42 91 3 72 24 43 73 55 31 72 2 23 74 18 3 -0.28 - 18 0 0 73 14 5 15 32 20.6 42 92 3 72 28 56 73 59 24 72 6 41 74 21 51 -0.28 - 17 0 0 73 17 50 15 32 22.9 43 93 2 72 32 50 74 3 0 72 10 40 74 25 23 -0.28 - 16 0 0 73 21 18 15 32 25.2 43 94 2 72 36 27 74 6 19 72 14 20 74 28 37 -0.28 - 15 0 0 73 24 28 15 32 27.5 43 95 2 72 39 45 74 9 21 72 17 42 74 31 36 -0.28 - 14 0 0 73 27 22 15 32 29.8 44 96 2 72 42 45 74 12 7 72 20 46 74 34 18 -0.28 - 13 0 0 73 29 58 15 32 32.1 44 97 2 72 45 28 74 14 37 72 23 32 74 36 45 -0.28 - 12 0 0 73 32 18 15 32 34.5 44 98 1 72 47 53 74 16 51 72 26 1 74 38 56 -0.28 - 11 0 0 73 34 21 15 32 36.8 44 99 1 72 50 2 74 18 49 72 28 11 74 40 51 -0.28 - 10 0 0 73 36 7 15 32 39.1 45 100 1 72 51 53 74 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74 19 22 72 28 52 74 41 23 -0.27 4 0 0 73 32 59 15 33 12.4 49 115 -2 72 48 38 74 17 29 72 26 47 74 39 32 -0.27 5 0 0 73 30 45 15 33 14.9 49 116 -2 72 46 18 74 15 20 72 24 24 74 37 26 -0.27 6 0 0 73 28 14 15 33 17.5 49 117 -2 72 43 41 74 12 56 72 21 44 74 35 4 -0.27 7 0 0 73 25 26 15 33 20.0 49 118 -3 72 40 47 74 10 14 72 18 46 74 32 27 -0.27 8 0 0 73 22 21 15 33 22.6 50 120 -3 72 37 34 74 7 17 72 15 30 74 29 33 -0.27 9 0 0 73 18 58 15 33 25.1 50 121 -3 72 34 4 74 4 3 72 11 56 74 26 23 -0.27 10 0 0 73 15 19 15 33 27.8 50 122 -3 72 30 15 74 0 32 72 8 3 74 22 56 -0.27 11 0 0 73 11 21 15 33 30.4 50 123 -3 72 26 8 73 56 44 72 3 51 74 19 13 -0.27 12 0 0 73 7 5 15 33 33.1 51 124 -4 72 21 41 73 52 38 71 59 19 74 15 13 -0.27 13 0 0 73 2 30 15 33 35.8 51 125 -4 72 16 56 73 48 15 71 54 28 74 10 55 -0.27 14 0 0 72 57 37 15 33 38.6 51 126 -4 72 11 51 73 43 34 71 49 17 74 6 20 -0.27 15 0 0 72 52 25 15 33 41.3 52 127 -4 72 6 26 73 38 34 71 43 46 74 1 26 -0.27 16 0 0 72 46 52 15 33 44.2 52 128 -4 72 0 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10 28 71 51 29 69 45 38 72 16 35 -0.27 30 0 0 70 49 40 15 34 29.1 56 144 -8 69 58 50 71 40 44 69 33 48 72 6 3 -0.27 31 0 0 70 37 59 15 34 32.9 57 146 -8 69 46 41 71 29 30 69 21 25 71 55 2 -0.27 32 0 0 70 25 45 15 34 36.7 57 147 -9 69 33 59 71 17 45 69 8 29 71 43 32 -0.27 33 0 0 70 12 59 15 34 40.6 57 148 -9 69 20 43 71 5 29 68 54 59 71 31 30 -0.27 34 0 0 69 59 38 15 34 44.5 58 149 -9 69 6 52 70 52 39 68 40 53 71 18 56 -0.27 35 0 0 69 45 42 15 34 48.6 58 151 -9 68 52 24 70 39 15 68 26 9 71 5 49 -0.27 36 0 0 69 31 9 15 34 52.8 59 152 -10 68 37 18 70 25 16 68 10 47 70 52 6 -0.27 37 0 0 69 15 58 15 34 57.1 59 153 -10 68 21 32 70 10 40 67 54 44 70 37 47 -0.27 38 0 0 69 0 7 15 35 1.6 59 154 -10 68 5 5 69 55 25 67 37 59 70 22 50 -0.27 39 0 0 68 43 34 15 35 6.1 60 156 -11 67 47 55 69 39 29 67 20 31 70 7 14 -0.27 40 0 0 68 26 17 15 35 10.8 60 157 -11 67 29 59 69 22 52 67 2 17 69 50 56 -0.27 41 0 0 68 8 15 15 35 15.6 61 158 -12 67 11 17 69 5 30 66 43 15 69 33 54 -0.27 42 0 0 67 49 25 15 35 20.6 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41 38 47 50 -0.29 81 0 0 34 39 5 15 42 35.8 67 292 -42 32 59 56 36 19 49 32 11 29 37 10 13 -0.29 82 0 0 32 58 7 15 42 55.7 65 295 -43 31 18 36 34 39 15 30 29 59 35 29 52 -0.29 83 0 0 31 14 51 15 43 15.8 64 298 -45 29 35 7 32 56 14 28 46 24 33 46 59 -0.29 84 0 0 29 29 32 15 43 36.0 62 301 -46 27 49 44 31 11 1 27 1 0 32 1 49 -0.29 85 0 0 27 42 25 15 43 56.2 60 303 -47 26 2 42 29 23 49 25 14 1 30 14 36 -0.30 86 0 0 25 53 48 15 44 16.4 58 305 -49 24 14 19 27 34 59 23 25 46 28 25 39 -0.30 87 0 0 24 3 59 15 44 36.4 57 307 -50 22 24 54 25 44 48 21 36 32 26 35 17 -0.30 88 0 0 22 13 19 15 44 56.1 55 309 -51 20 34 46 23 53 35 19 46 39 24 43 48 -0.30 89 0 0 20 22 5 15 45 15.5 53 310 -52 18 44 12 22 1 40 17 56 26 22 51 33 -0.30 90 0 0 18 30 39 15 45 34.4 51 311 -54 16 53 34 20 9 25 16 6 11 20 58 52 -0.30 91 0 0 16 39 18 15 45 52.9 49 312 -55 15 3 9 18 17 8 14 16 12 19 6 7 -0.31 92 0 0 14 48 23 15 46 10.8 47 313 -56 13 13 15 16 25 10 12 26 48 17 13 37 -0.31 93 0 0 12 58 11 15 46 28.0 45 314 -57 11 24 8 14 33 49 10 38 14 15 21 41 -0.31 94 0 0 11 8 57 15 46 44.5 43 315 -58 9 36 6 12 43 22 8 50 46 13 30 37 -0.31 95 0 0 9 20 58 15 47 0.3 41 316 -59 7 49 22 10 54 5 7 4 37 11 40 41 -0.31 96 0 0 7 34 27 15 47 15.3 39 316 -59 6 4 8 9 6 12 5 20 1 9 52 7 -0.32 97 0 0 5 49 35 15 47 29.6 37 317 -60 4 20 37 7 19 58 3 37 9 8 5 10 -0.32 98 0 0 4 6 34 15 47 43.0 35 317 -61 2 38 58 5 35 32 1 56 10 6 20 1 -0.32 99 0 0 2 25 33 15 47 55.5 33 317 -61 0 59 20 3 53 5 0 17 11 4 36 50 -0.32 100 0 0 0 46 39 15 48 7.3 31 318 -61 - 0 38 11 2 12 44 - 1 19 40 2 55 45 -0.32 101 0 0 - 0 50 2 15 48 18.2 29 318 -62 - 2 13 29 0 34 36 - 2 54 17 1 16 53 -0.32 102 0 0 - 2 24 25 15 48 28.3 27 318 -62 - 3 46 29 - 1 1 13 - 4 26 38 - 0 19 40 -0.33 103 0 0 - 3 56 27 15 48 37.6 25 318 -62 - 5 17 9 - 2 34 41 - 5 56 38 - 1 53 51 -0.33 104 0 0 - 5 26 5 15 48 46.2 24 318 -62 - 6 45 26 - 4 5 43 - 7 24 16 - 3 25 35 -0.33 105 0 0 - 6 53 18 15 48 54.0 22 318 -62 - 8 11 19 - 5 34 18 - 8 49 31 - 4 54 53 -0.33 106 0 0 - 8 18 5 15 49 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15 49 40.4 2 315 -55 -23 17 42 -21 9 59 -23 48 56 -20 38 6 -0.48 119 0 0 -23 9 57 15 49 40.7 1 315 -54 .. .. .. -22 6 44 .. .. .. -21 35 18 -0.82 120 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -23 1 33 .. .. .. -22 30 34 .... Uncertainty in time = +/- 4 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 2899-01763-1 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 00 44.7629 DE: +39 47 46.907 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 00 44.7628 DE: +39 47 46.907 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (117) Lomia asteroid class: approx. diameter [km]: 158 approx. diameter ["]: 0.088 distance from Earth [AU]: 2.47770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#120 date of fit: 2023 Feb 07 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): 0.024", 0.017", 82.148° remarks: * orbital elements for (117)Lomia : Mean anomaly = 54.1381503183 deg Arg. of pericenter = 51.5546578304 deg Long. of node = 348.6334082006 deg Inclination = 14.9272370877 deg Eccentricity = 0.0235001211 Semimajor axis = 2.9894533264 AU Perihelion dist = 2.9192008113 AU Mag: H = 8.09, G = 0.15 Epoch of elements : MJD 59992.65243056 TDT (2023 Feb 17.6524) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1202023Feb07,15.65,2023,2,17,15.658972,0.192409,0.181649,3.914201,-4.146266,0.005640,-0.000008,0.000001,0.000000 53.3435,39.8324,-51.39,-11.92,False TYC 2899-01763-1,5.01243415,39.7963630,0.00,10.78,0.00,0.0,0,,5.03904161,39.8323786,2.69,0.00,0,0,0 117,Lomia,13.37,158.1,2.4777,0,0,1.207,-14.71,,7.8,0 0,54.0137,2023,2,17,51.5547,348.6334,14.9272,0.02350,2.98945,2.91920,8.10,5.0,0.15 1.247,0.0237,0.0173,82,0.0217,Known errors,-1.00,-1,-1,-1 20230217_1763-1,59990.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org