IOTA/IOTA-ES occultation update for (9096) Tamotsu / UCAC4 555-046183 event on 2024 Sep 22, 10:03 UT Visible from Summary ------- On 2024 Sep 22 UT, the 13.755 km diameter asteroid (9096) Tamotsu will occult a 11.9 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.62 mag to 18.47 mag (the magnitude of the asteroid) for at most 0.380 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 Sep 22, 10:00 - 2024 Sep 22, 10:06 * geocentric midpoint of event [JD]: 2460575.91934975 * magnitude of target star: 11.85 * magnitude drop [mag]: 6.62 * estimated maximum duration [s]: 0.380 * Moon: 76 % sunlit, 75° distance * Sun: 46° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 104°) * approx speed of asteroid's shadow [km/s]: 36.5925 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 555-046183 by 9096 Tamotsu on 2024 Sep 22 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 -103 0 0 - 0 38 43 10 1 2.7 1 69 -41 - 0 42 50 - 0 34 37 - 0 45 18 - 0 32 10 .... -102 0 0 - 0 16 3 10 1 2.7 2 69 -40 - 0 20 10 - 0 11 57 - 0 22 37 - 0 9 30 0.09 -101 0 0 0 6 18 10 1 2.9 3 69 -39 0 2 12 0 10 24 - 0 0 15 0 12 51 0.15 -100 0 0 0 28 20 10 1 3.1 4 69 -38 0 24 15 0 32 26 0 21 48 0 34 52 0.18 - 99 0 0 0 50 4 10 1 3.3 5 69 -37 0 45 59 0 54 8 0 43 32 0 56 35 0.19 - 98 0 0 1 11 27 10 1 3.6 6 69 -36 1 7 22 1 15 31 1 4 56 1 17 57 0.20 - 97 0 0 1 32 30 10 1 4.0 7 69 -35 1 28 26 1 36 34 1 26 0 1 39 0 0.21 - 96 0 0 1 53 12 10 1 4.4 8 69 -34 1 49 9 1 57 16 1 46 43 1 59 42 0.22 - 95 0 0 2 13 34 10 1 4.9 9 69 -33 2 9 31 2 17 37 2 7 5 2 20 2 0.22 - 94 0 0 2 33 34 10 1 5.5 10 69 -32 2 29 31 2 37 37 2 27 6 2 40 2 0.22 - 93 0 0 2 53 12 10 1 6.1 11 69 -31 2 49 10 2 57 15 2 46 45 2 59 40 0.22 - 92 0 0 3 12 29 10 1 6.7 12 69 -30 3 8 27 3 16 31 3 6 2 3 18 56 0.23 - 91 0 0 3 31 23 10 1 7.5 13 69 -29 3 27 22 3 35 25 3 24 57 3 37 49 0.23 - 90 0 0 3 49 55 10 1 8.2 14 69 -28 3 45 54 3 53 56 3 43 30 3 56 20 0.23 - 89 0 0 4 8 4 10 1 9.1 15 70 -27 4 4 3 4 12 4 4 1 39 4 14 28 0.23 - 88 0 0 4 25 49 10 1 10.0 16 70 -26 4 21 49 4 29 50 4 19 25 4 32 13 0.23 - 87 0 0 4 43 12 10 1 10.9 17 70 -25 4 39 12 4 47 12 4 36 48 4 49 35 0.23 - 86 0 0 5 0 10 10 1 11.9 18 70 -24 4 56 11 5 4 10 4 53 48 5 6 33 0.24 - 85 0 0 5 16 45 10 1 13.0 19 70 -23 5 12 46 5 20 44 5 10 23 5 23 7 0.24 - 84 0 0 5 32 56 10 1 14.1 21 70 -22 5 28 57 5 36 55 5 26 35 5 39 17 0.24 - 83 0 0 5 48 43 10 1 15.3 22 70 -21 5 44 44 5 52 41 5 42 22 5 55 3 0.24 - 82 0 0 6 4 5 10 1 16.5 23 70 -20 6 0 7 6 8 2 5 57 44 6 10 25 0.24 - 81 0 0 6 19 2 10 1 17.7 24 70 -19 6 15 4 6 22 59 6 12 42 6 25 21 0.24 - 80 0 0 6 33 34 10 1 19.1 25 70 -18 6 29 37 6 37 31 6 27 15 6 39 53 0.24 - 79 0 0 6 47 42 10 1 20.4 26 70 -17 6 43 45 6 51 38 6 41 23 6 54 0 0.24 - 78 0 0 7 1 24 10 1 21.8 27 70 -16 6 57 28 7 5 20 6 55 6 7 7 42 0.24 - 77 0 0 7 14 41 10 1 23.3 28 70 -15 7 10 45 7 18 37 7 8 23 7 20 58 0.24 - 76 0 0 7 27 32 10 1 24.8 29 70 -14 7 23 37 7 31 28 7 21 15 7 33 49 0.24 - 75 0 0 7 39 58 10 1 26.4 30 70 -13 7 36 3 7 43 53 7 33 42 7 46 14 0.24 - 74 0 0 7 51 58 10 1 28.0 31 70 -12 7 48 3 7 55 53 7 45 42 7 58 14 0.24 - 73 0 0 8 3 33 10 1 29.6 32 70 -11 7 59 38 8 7 27 7 57 17 8 9 48 0.24 - 72 0 0 8 14 41 10 1 31.3 33 70 -10 8 10 47 8 18 35 8 8 26 8 20 56 0.24 - 71 0 0 8 25 23 10 1 33.1 34 71 -9 8 21 29 8 29 17 8 19 9 8 31 38 0.24 - 70 0 0 8 35 40 10 1 34.8 35 71 -8 8 31 46 8 39 33 8 29 26 8 41 53 0.24 - 69 0 0 8 45 30 10 1 36.7 36 71 -7 8 41 36 8 49 23 8 39 16 8 51 43 0.24 - 68 0 0 8 54 53 10 1 38.5 37 71 -6 8 51 0 8 58 47 8 48 40 9 1 6 0.24 - 67 0 0 9 3 51 10 1 40.4 38 71 -5 8 59 57 9 7 44 8 57 38 9 10 3 0.24 - 66 0 0 9 12 21 10 1 42.4 39 71 -4 9 8 28 9 16 14 9 6 9 9 18 34 0.25 - 65 0 0 9 20 26 10 1 44.4 40 71 -3 9 16 33 9 24 18 9 14 14 9 26 37 0.25 - 64 0 0 9 28 3 10 1 46.4 41 71 -2 9 24 11 9 31 56 9 21 52 9 34 15 0.25 - 63 0 0 9 35 14 10 1 48.5 42 71 -1 9 31 22 9 39 7 9 29 3 9 41 26 0.25 - 62 0 0 9 41 59 10 1 50.6 43 71 0 9 38 7 9 45 51 9 35 48 9 48 10 0.25 - 61 0 0 9 48 16 10 1 52.7 44 70 1 9 44 25 9 52 8 9 42 6 9 54 27 0.25 - 60 0 0 9 54 7 10 1 54.9 45 70 2 9 50 16 9 57 59 9 47 57 10 0 18 0.25 - 59 0 0 9 59 31 10 1 57.1 45 70 3 9 55 40 10 3 23 9 53 21 10 5 41 0.25 - 58 0 0 10 4 29 10 1 59.4 46 70 4 10 0 37 10 8 20 9 58 19 10 10 38 0.25 - 57 0 0 10 8 59 10 2 1.6 47 70 5 10 5 8 10 12 50 10 2 49 10 15 9 0.25 - 56 0 0 10 13 2 10 2 4.0 48 70 6 10 9 11 10 16 53 10 6 53 10 19 12 0.25 - 55 0 0 10 16 39 10 2 6.3 49 70 7 10 12 48 10 20 30 10 10 29 10 22 48 0.25 - 54 0 0 10 19 48 10 2 8.7 50 70 8 10 15 57 10 23 39 10 13 39 10 25 57 0.25 - 53 0 0 10 22 30 10 2 11.1 51 69 9 10 18 40 10 26 21 10 16 21 10 28 39 0.25 - 52 0 0 10 24 46 10 2 13.6 52 69 10 10 20 55 10 28 37 10 18 37 10 30 55 0.25 - 51 0 0 10 26 34 10 2 16.0 53 69 11 10 22 43 10 30 25 10 20 25 10 32 43 0.25 - 50 0 0 10 27 55 10 2 18.5 54 69 12 10 24 4 10 31 46 10 21 46 10 34 4 0.25 - 49 0 0 10 28 49 10 2 21.1 55 68 13 10 24 59 10 32 40 10 22 40 10 34 58 0.25 - 48 0 0 10 29 16 10 2 23.6 56 68 14 10 25 26 10 33 7 10 23 7 10 35 25 0.25 - 47 0 0 10 29 16 10 2 26.2 57 68 15 10 25 25 10 33 7 10 23 7 10 35 25 0.25 - 46 0 0 10 28 49 10 2 28.9 58 67 16 10 24 58 10 32 40 10 22 40 10 34 58 0.25 - 45 0 0 10 27 55 10 2 31.5 59 67 17 10 24 4 10 31 45 10 21 46 10 34 3 0.25 - 44 0 0 10 26 33 10 2 34.2 60 66 18 10 22 42 10 30 24 10 20 24 10 32 42 0.25 - 43 0 0 10 24 44 10 2 36.9 60 66 19 10 20 53 10 28 35 10 18 35 10 30 53 0.25 - 42 0 0 10 22 29 10 2 39.6 61 65 20 10 18 38 10 26 19 10 16 19 10 28 38 0.25 - 41 0 0 10 19 46 10 2 42.4 62 64 21 10 15 55 10 23 36 10 13 36 10 25 55 0.25 - 40 0 0 10 16 35 10 2 45.2 63 64 22 10 12 44 10 20 26 10 10 26 10 22 45 0.25 - 39 0 0 10 12 58 10 2 48.0 64 63 23 10 9 7 10 16 49 10 6 49 10 19 8 0.25 - 38 0 0 10 8 54 10 2 50.8 65 62 24 10 5 2 10 12 45 10 2 44 10 15 3 0.25 - 37 0 0 10 4 22 10 2 53.6 66 61 25 10 0 31 10 8 14 9 58 12 10 10 32 0.25 - 36 0 0 9 59 24 10 2 56.5 66 60 26 9 55 32 10 3 15 9 53 13 10 5 34 0.25 - 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6 0 0 4 4 18 10 4 28.6 71 334 57 4 0 17 4 8 19 3 57 52 4 10 43 0.25 - 5 0 0 3 45 54 10 4 31.8 70 332 58 3 41 52 3 49 55 3 39 27 3 52 19 0.25 - 4 0 0 3 27 6 10 4 34.9 70 330 59 3 23 4 3 31 8 3 20 39 3 33 32 0.25 - 3 0 0 3 7 55 10 4 38.0 69 328 60 3 3 53 3 11 57 3 1 27 3 14 22 0.25 - 2 0 0 2 48 21 10 4 41.1 68 326 61 2 44 18 2 52 24 2 41 53 2 54 49 0.25 - 1 0 0 2 28 25 10 4 44.2 67 325 62 2 24 22 2 32 28 2 21 56 2 34 54 0.25 0 0 0 2 8 6 10 4 47.3 66 323 63 2 4 3 2 12 10 2 1 37 2 14 36 0.25 1 0 0 1 47 26 10 4 50.3 66 322 64 1 43 22 1 51 30 1 40 55 1 53 56 0.25 2 0 0 1 26 24 10 4 53.4 65 321 65 1 22 19 1 30 28 1 19 53 1 32 55 0.25 3 0 0 1 5 0 10 4 56.4 64 320 66 1 0 55 1 9 5 0 58 29 1 11 32 0.25 4 0 0 0 43 16 10 4 59.4 63 319 67 0 39 11 0 47 22 0 36 44 0 49 49 0.25 5 0 0 0 21 12 10 5 2.4 62 318 68 0 17 6 0 25 18 0 14 39 0 27 45 0.25 6 0 0 - 0 1 12 10 5 5.3 61 317 69 - 0 5 19 0 2 54 - 0 7 46 0 5 21 0.25 7 0 0 - 0 23 56 10 5 8.3 60 316 70 - 0 28 3 - 0 19 49 - 0 30 31 - 0 17 22 0.25 8 0 0 - 0 46 59 10 5 11.2 59 315 71 - 0 51 6 - 0 42 52 - 0 53 34 - 0 40 24 0.25 9 0 0 - 1 10 20 10 5 14.1 58 315 72 - 1 14 28 - 1 6 13 - 1 16 56 - 1 3 45 0.25 10 0 0 - 1 34 0 10 5 17.0 57 314 73 - 1 38 8 - 1 29 52 - 1 40 37 - 1 27 24 0.25 11 0 0 - 1 57 57 10 5 19.8 56 313 74 - 2 2 6 - 1 53 49 - 2 4 34 - 1 51 20 0.25 12 0 0 - 2 22 11 10 5 22.6 55 313 75 - 2 26 20 - 2 18 3 - 2 28 49 - 2 15 34 0.25 13 0 0 - 2 46 42 10 5 25.4 54 312 76 - 2 50 51 - 2 42 33 - 2 53 21 - 2 40 4 0.25 14 0 0 - 3 11 29 10 5 28.1 53 311 77 - 3 15 38 - 3 7 19 - 3 18 8 - 3 4 50 0.25 15 0 0 - 3 36 31 10 5 30.8 52 311 78 - 3 40 41 - 3 32 21 - 3 43 10 - 3 29 51 0.25 16 0 0 - 4 1 47 10 5 33.5 51 310 79 - 4 5 58 - 3 57 37 - 4 8 28 - 3 55 7 0.25 17 0 0 - 4 27 18 10 5 36.2 50 310 79 - 4 31 29 - 4 23 8 - 4 33 59 - 4 20 38 0.25 18 0 0 - 4 53 3 10 5 38.8 49 310 80 - 4 57 14 - 4 48 52 - 4 59 44 - 4 46 22 0.25 19 0 0 - 5 19 0 10 5 41.3 48 309 81 - 5 23 12 - 5 14 49 - 5 25 42 - 5 12 19 0.25 20 0 0 - 5 45 10 10 5 43.8 47 309 81 - 5 49 22 - 5 40 58 - 5 51 53 - 5 38 28 0.25 21 0 0 - 6 11 31 10 5 46.3 46 308 82 - 6 15 44 - 6 7 19 - 6 18 14 - 6 4 49 0.25 22 0 0 - 6 38 4 10 5 48.7 44 308 82 - 6 42 16 - 6 33 51 - 6 44 47 - 6 31 20 0.25 23 0 0 - 7 4 46 10 5 51.1 43 308 82 - 7 8 59 - 7 0 34 - 7 11 30 - 6 58 3 0.25 24 0 0 - 7 31 38 10 5 53.4 42 307 82 - 7 35 51 - 7 27 25 - 7 38 23 - 7 24 54 0.25 25 0 0 - 7 58 39 10 5 55.7 41 307 82 - 8 2 52 - 7 54 26 - 8 5 24 - 7 51 55 0.25 26 0 0 - 8 25 48 10 5 58.0 40 306 82 - 8 30 2 - 8 21 35 - 8 32 34 - 8 19 3 0.25 27 0 0 - 8 53 5 10 6 0.2 39 306 81 - 8 57 19 - 8 48 51 - 8 59 50 - 8 46 19 0.25 28 0 0 - 9 20 28 10 6 2.3 38 306 81 - 9 24 42 - 9 16 14 - 9 27 14 - 9 13 42 0.25 29 0 0 - 9 47 57 10 6 4.4 37 305 80 - 9 52 11 - 9 43 43 - 9 54 43 - 9 41 11 0.25 30 0 0 -10 15 32 10 6 6.4 36 305 79 -10 19 46 -10 11 17 -10 22 18 -10 8 45 0.25 31 0 0 -10 43 10 10 6 8.4 35 305 78 -10 47 25 -10 38 56 -10 49 57 -10 36 24 0.25 32 0 0 -11 10 53 10 6 10.3 34 305 78 -11 15 7 -11 6 38 -11 17 40 -11 4 6 0.25 33 0 0 -11 38 38 10 6 12.2 33 304 77 -11 42 53 -11 34 24 -11 45 26 -11 31 51 0.25 34 0 0 -12 6 26 10 6 14.0 32 304 76 -12 10 41 -12 2 11 -12 13 13 -11 59 39 0.25 35 0 0 -12 34 15 10 6 15.8 31 304 75 -12 38 30 -12 30 0 -12 41 3 -12 27 27 0.25 36 0 0 -13 2 5 10 6 17.5 29 303 74 -13 6 20 -12 57 50 -13 8 52 -12 55 17 0.25 37 0 0 -13 29 54 10 6 19.1 28 303 73 -13 34 9 -13 25 39 -13 36 42 -13 23 6 0.24 38 0 0 -13 57 43 10 6 20.7 27 303 72 -14 1 58 -13 53 28 -14 4 31 -13 50 55 0.24 39 0 0 -14 25 30 10 6 22.2 26 302 71 -14 29 45 -14 21 15 -14 32 18 -14 18 42 0.24 40 0 0 -14 53 15 10 6 23.7 25 302 70 -14 57 30 -14 49 0 -15 0 3 -14 46 27 0.24 41 0 0 -15 20 57 10 6 25.1 24 302 69 -15 25 12 -15 16 42 -15 27 45 -15 14 9 0.24 42 0 0 -15 48 35 10 6 26.4 23 301 68 -15 52 50 -15 44 20 -15 55 23 -15 41 47 0.24 43 0 0 -16 16 8 10 6 27.7 22 301 67 -16 20 23 -16 11 53 -16 22 56 -16 9 20 0.24 44 0 0 -16 43 36 10 6 28.9 21 301 66 -16 47 51 -16 39 21 -16 50 24 -16 36 49 0.24 45 0 0 -17 10 59 10 6 30.1 20 300 65 -17 15 14 -17 6 44 -17 17 46 -17 4 11 0.24 46 0 0 -17 38 14 10 6 31.2 19 300 64 -17 42 29 -17 33 59 -17 45 2 -17 31 27 0.24 47 0 0 -18 5 22 10 6 32.2 18 300 63 -18 9 37 -18 1 8 -18 12 10 -17 58 35 0.24 48 0 0 -18 32 23 10 6 33.2 17 299 62 -18 36 38 -18 28 8 -18 39 10 -18 25 36 0.24 49 0 0 -18 59 15 10 6 34.1 16 299 61 -19 3 29 -18 55 0 -19 6 2 -18 52 28 0.24 50 0 0 -19 25 57 10 6 35.0 15 299 60 -19 30 11 -19 21 43 -19 32 44 -19 19 10 0.24 51 0 0 -19 52 29 10 6 35.8 14 298 59 -19 56 44 -19 48 15 -19 59 16 -19 45 43 0.24 52 0 0 -20 18 51 10 6 36.5 13 298 58 -20 23 5 -20 14 37 -20 25 38 -20 12 5 0.24 53 0 0 -20 45 2 10 6 37.2 11 298 57 -20 49 16 -20 40 48 -20 51 48 -20 38 17 0.24 54 0 0 -21 11 1 10 6 37.8 10 297 56 -21 15 15 -21 6 48 -21 17 47 -21 4 16 0.24 55 0 0 -21 36 48 10 6 38.3 9 297 55 -21 41 1 -21 32 35 -21 43 33 -21 30 3 0.24 56 0 0 -22 2 22 10 6 38.8 8 297 54 -22 6 35 -21 58 9 -22 9 7 -21 55 38 0.24 57 0 0 -22 27 43 10 6 39.3 7 296 53 -22 31 56 -22 23 30 -22 34 27 -22 20 59 0.24 58 0 0 -22 52 49 10 6 39.6 6 296 52 -22 57 2 -22 48 37 -22 59 33 -22 46 6 0.24 59 0 0 -23 17 42 10 6 40.0 5 295 51 -23 21 54 -23 13 30 -23 24 25 -23 10 59 0.24 60 0 0 -23 42 19 10 6 40.2 4 295 50 -23 46 31 -23 38 7 -23 49 2 -23 35 37 0.24 61 0 0 -24 6 42 10 6 40.4 3 295 49 -24 10 53 -24 2 30 -24 13 24 -23 59 59 0.24 62 0 0 -24 30 48 10 6 40.6 2 294 48 -24 35 0 -24 26 37 -24 37 30 -24 24 7 0.24 63 0 0 -24 54 39 10 6 40.7 1 294 47 -24 58 50 -24 50 28 -25 1 20 -24 47 57 0.23 64 0 0 -25 18 12 10 6 40.7 0 293 46 -25 22 23 -25 14 2 -25 24 53 -25 11 32 0.20 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 555-046183 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 11 21.6557 DE: +20 55 16.784 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 11 21.6558 DE: +20 55 16.783 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.9 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9096) Tamotsu asteroid class: approx. diameter [km]: 14 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.81410 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 27 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): 0.015", 0.001", 103.865° remarks: * orbital elements for (9096)Tamotsu : Mean anomaly = 112.7448314410 deg Arg. of pericenter = 296.2642564931 deg Long. of node = 69.8770136337 deg Inclination = 6.8718078587 deg Eccentricity = 0.0219273928 Semimajor axis = 3.1673063763 AU Perihelion dist = 3.0978556052 AU Mag: H = 12.28, G = 0.15 Epoch of elements : MJD 60575.41934938 TDT (2024 Sep 22.4193) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr27,0.38,2024,9,22,10.064394,-0.054897,-0.236502,20.111705,-4.701061,-0.003824,0.001521,-0.000001,0.000000 -14.5397,20.8218,27.18,0.04,False UCAC4 555-046183,9.18934877,20.9213291,12.10,11.85,11.72,0.0,0,K,9.21254242,20.8218267,6.62,6.31,0,0,0 9096,Tamotsu,18.47,13.755,3.8141,0,0,3.308,-10.85,,1.4,0 0,112.6715,2024,9,22,296.2643,69.8770,6.8718,0.02193,3.16731,3.09786,12.28,5.0,0.15 1.299,0.0150,0.0015,104,0.0015,Known errors,1.03,0,-1,-1 20240922_046183,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org