IOTA/IOTA-ES occultation update for (509) Iolanda / UCAC4 440-046836 event on 2024 Dec 16, 23:42 UT Visible from Summary ------- On 2024 Dec 16 UT, the 57.737 km diameter asteroid (509) Iolanda will occult a 12.0 mag star in the constellation Hydra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.86 mag to 13.63 mag (the magnitude of the asteroid) for at most 6.970 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: 94 * date and approx. time of event: 2024 Dec 16, 23:29 - 2024 Dec 16, 23:55 * geocentric midpoint of event [JD]: 2460661.48772745 * magnitude of target star: 11.99 * magnitude drop [mag]: 1.86 * estimated maximum duration [s]: 6.970 * Moon: 96 % sunlit, 36° distance * Sun: 130° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 58 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.003", 103°) * approx speed of asteroid's shadow [km/s]: 8.2865 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 440-046836 by 509 Iolanda on 2024 Dec 16 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 - 47 0 0 -45 56 27 23 55 2.5 0 93 -9 -45 40 44 -46 12 10 -45 26 42 -46 26 14 .... - 46 0 0 -45 58 24 23 55 2.4 1 92 -9 -45 42 42 -46 14 7 -45 28 40 -46 28 10 0.09 - 45 0 0 -45 59 54 23 55 2.2 2 92 -10 -45 44 12 -46 15 36 -45 30 10 -46 29 39 0.10 - 44 0 0 -46 0 56 23 55 1.9 2 91 -10 -45 45 14 -46 16 38 -45 31 12 -46 30 41 0.10 - 43 0 0 -46 1 30 23 55 1.4 3 90 -10 -45 45 48 -46 17 12 -45 31 47 -46 31 14 0.11 - 42 0 0 -46 1 36 23 55 0.9 4 89 -11 -45 45 54 -46 17 18 -45 31 53 -46 31 21 0.11 - 41 0 0 -46 1 15 23 55 0.2 4 89 -11 -45 45 33 -46 16 57 -45 31 31 -46 31 0 0.11 - 40 0 0 -46 0 26 23 54 59.4 5 88 -12 -45 44 44 -46 16 9 -45 30 42 -46 30 11 0.11 - 39 0 0 -45 59 10 23 54 58.5 6 87 -12 -45 43 27 -46 14 53 -45 29 25 -46 28 56 0.11 - 38 0 0 -45 57 26 23 54 57.5 7 87 -13 -45 41 43 -46 13 9 -45 27 40 -46 27 13 0.11 - 37 0 0 -45 55 14 23 54 56.4 7 86 -13 -45 39 30 -46 10 58 -45 25 28 -46 25 2 0.11 - 36 0 0 -45 52 35 23 54 55.1 8 85 -13 -45 36 50 -46 8 20 -45 22 47 -46 22 24 0.11 - 35 0 0 -45 49 28 23 54 53.8 9 84 -14 -45 33 43 -46 5 14 -45 19 39 -46 19 19 0.11 - 34 0 0 -45 45 54 23 54 52.3 9 84 -14 -45 30 7 -46 1 40 -45 16 2 -46 15 47 0.12 - 33 0 0 -45 41 51 23 54 50.7 10 83 -15 -45 26 4 -45 57 39 -45 11 58 -46 11 46 0.12 - 32 0 0 -45 37 21 23 54 49.0 11 82 -15 -45 21 33 -45 53 10 -45 7 26 -46 7 18 0.12 - 31 0 0 -45 32 23 23 54 47.2 11 82 -16 -45 16 34 -45 48 13 -45 2 26 -46 2 23 0.12 - 30 0 0 -45 26 57 23 54 45.3 12 81 -16 -45 11 6 -45 42 49 -44 56 57 -45 57 0 0.12 - 29 0 0 -45 21 3 23 54 43.2 13 80 -16 -45 5 11 -45 36 56 -44 51 0 -45 51 8 0.12 - 28 0 0 -45 14 41 23 54 41.0 14 79 -17 -44 58 47 -45 30 36 -44 44 35 -45 44 49 0.12 - 27 0 0 -45 7 50 23 54 38.7 14 79 -17 -44 51 55 -45 23 47 -44 37 41 -45 38 2 0.12 - 26 0 0 -45 0 31 23 54 36.3 15 78 -18 -44 44 34 -45 16 29 -44 30 19 -45 30 46 0.12 - 25 0 0 -44 52 43 23 54 33.8 16 77 -18 -44 36 44 -45 8 43 -44 22 27 -45 23 2 0.12 - 24 0 0 -44 44 27 23 54 31.1 16 77 -18 -44 28 25 -45 0 29 -44 14 7 -45 14 49 0.12 - 23 0 0 -44 35 41 23 54 28.3 17 76 -19 -44 19 38 -44 51 45 -44 5 17 -45 6 7 0.12 - 22 0 0 -44 26 26 23 54 25.4 18 75 -19 -44 10 21 -44 42 33 -43 55 58 -44 56 57 0.12 - 21 0 0 -44 16 42 23 54 22.3 19 75 -20 -44 0 34 -44 32 51 -43 46 10 -44 47 17 0.12 - 20 0 0 -44 6 29 23 54 19.1 19 74 -20 -43 50 18 -44 22 40 -43 35 51 -44 37 8 0.12 - 19 0 0 -43 55 45 23 54 15.8 20 73 -21 -43 39 32 -44 11 59 -43 25 3 -44 26 29 0.12 - 18 0 0 -43 44 32 23 54 12.3 21 72 -21 -43 28 16 -44 0 48 -43 13 45 -44 15 20 0.12 - 17 0 0 -43 32 48 23 54 8.7 21 72 -21 -43 16 30 -43 49 7 -43 1 56 -44 3 42 0.12 - 16 0 0 -43 20 34 23 54 5.0 22 71 -22 -43 4 13 -43 36 55 -42 49 36 -43 51 33 0.12 - 15 0 0 -43 7 49 23 54 1.1 23 70 -22 -42 51 25 -43 24 13 -42 36 46 -43 38 54 0.12 - 14 0 0 -42 54 33 23 53 57.0 24 70 -23 -42 38 6 -43 11 0 -42 23 25 -43 25 43 0.12 - 13 0 0 -42 40 46 23 53 52.9 24 69 -23 -42 24 16 -42 57 17 -42 9 32 -43 12 2 0.13 - 12 0 0 -42 26 27 23 53 48.5 25 68 -23 -42 9 54 -42 43 1 -41 55 7 -42 57 50 0.13 - 11 0 0 -42 11 37 23 53 44.0 26 68 -24 -41 55 1 -42 28 14 -41 40 11 -42 43 6 0.13 - 10 0 0 -41 56 15 23 53 39.4 27 67 -24 -41 39 35 -42 12 55 -41 24 43 -42 27 50 0.13 - 9 0 0 -41 40 21 23 53 34.6 28 66 -25 -41 23 38 -41 57 4 -41 8 42 -42 12 2 0.13 - 8 0 0 -41 23 54 23 53 29.6 28 66 -25 -41 7 7 -41 40 41 -40 52 8 -41 55 42 0.13 - 7 0 0 -41 6 54 23 53 24.5 29 65 -25 -40 50 4 -41 23 45 -40 35 2 -41 38 49 0.13 - 6 0 0 -40 49 21 23 53 19.2 30 64 -26 -40 32 27 -41 6 16 -40 17 22 -41 21 23 0.13 - 5 0 0 -40 31 15 23 53 13.8 31 64 -26 -40 14 17 -40 48 13 -39 59 9 -41 3 24 0.13 - 4 0 0 -40 12 35 23 53 8.1 32 63 -26 -39 55 34 -40 29 37 -39 40 22 -40 44 51 0.13 - 3 0 0 -39 53 21 23 53 2.3 32 62 -27 -39 36 16 -40 10 27 -39 21 1 -40 25 45 0.13 - 2 0 0 -39 33 34 23 52 56.3 33 62 -27 -39 16 25 -39 50 43 -39 1 6 -40 6 4 0.13 - 1 0 0 -39 13 11 23 52 50.1 34 61 -28 -38 55 58 -39 30 25 -38 40 36 -39 45 49 0.13 0 0 0 -38 52 14 23 52 43.8 35 60 -28 -38 34 57 -39 9 32 -38 19 31 -39 25 0 0.13 1 0 0 -38 30 42 23 52 37.2 36 60 -28 -38 13 21 -38 48 4 -37 57 52 -39 3 36 0.13 2 0 0 -38 8 35 23 52 30.5 36 59 -29 -37 51 10 -38 26 1 -37 35 37 -38 41 37 0.13 3 0 0 -37 45 53 23 52 23.5 37 58 -29 -37 28 24 -38 3 23 -37 12 47 -38 19 2 0.13 4 0 0 -37 22 35 23 52 16.4 38 58 -29 -37 5 2 -37 40 9 -36 49 21 -37 55 52 0.13 5 0 0 -36 58 41 23 52 9.1 39 57 -30 -36 41 3 -37 16 20 -36 25 19 -37 32 6 0.13 6 0 0 -36 34 11 23 52 1.5 40 56 -30 -36 16 29 -36 51 54 -36 0 41 -37 7 44 0.13 7 0 0 -36 9 5 23 51 53.8 41 56 -30 -35 51 19 -36 26 52 -35 35 27 -36 42 46 0.13 8 0 0 -35 43 23 23 51 45.8 42 55 -31 -35 25 32 -36 1 14 -35 9 37 -36 17 12 0.13 9 0 0 -35 17 4 23 51 37.6 43 54 -31 -34 59 9 -35 35 0 -34 43 10 -35 51 2 0.13 10 0 0 -34 50 9 23 51 29.3 44 54 -31 -34 32 10 -35 8 9 -34 16 6 -35 24 14 0.13 11 0 0 -34 22 37 23 51 20.7 44 53 -32 -34 4 33 -34 40 41 -33 48 26 -34 56 51 0.13 12 0 0 -33 54 28 23 51 11.8 45 53 -32 -33 36 20 -34 12 36 -33 20 9 -34 28 50 0.13 13 0 0 -33 25 42 23 51 2.8 46 52 -32 -33 7 30 -33 43 55 -32 51 15 -34 0 13 0.13 14 0 0 -32 56 20 23 50 53.5 47 51 -33 -32 38 4 -33 14 37 -32 21 45 -33 30 58 0.13 15 0 0 -32 26 21 23 50 44.0 48 51 -33 -32 8 0 -32 44 42 -31 51 38 -33 1 7 0.13 16 0 0 -31 55 45 23 50 34.3 49 50 -33 -31 37 20 -32 14 11 -31 20 54 -32 30 40 0.13 17 0 0 -31 24 33 23 50 24.4 50 49 -33 -31 6 4 -31 43 3 -30 49 33 -31 59 35 0.13 18 0 0 -30 52 44 23 50 14.2 51 49 -34 -30 34 11 -31 11 18 -30 17 37 -31 27 54 0.13 19 0 0 -30 20 18 23 50 3.8 52 48 -34 -30 1 41 -30 38 57 -29 45 4 -30 55 37 0.13 20 0 0 -29 47 17 23 49 53.1 53 47 -34 -29 28 36 -30 6 0 -29 11 55 -30 22 43 0.13 21 0 0 -29 13 40 23 49 42.2 54 47 -34 -28 54 55 -29 32 26 -28 38 10 -29 49 14 0.13 22 0 0 -28 39 27 23 49 31.1 55 46 -35 -28 20 38 -28 58 18 -28 3 49 -29 15 9 0.13 23 0 0 -28 4 39 23 49 19.8 56 45 -35 -27 45 46 -28 23 33 -27 28 54 -28 40 28 0.13 24 0 0 -27 29 16 23 49 8.2 57 44 -35 -27 10 19 -27 48 14 -26 53 24 -28 5 12 0.13 25 0 0 -26 53 19 23 48 56.4 58 44 -35 -26 34 18 -27 12 21 -26 17 19 -27 29 22 0.13 26 0 0 -26 16 48 23 48 44.4 59 43 -35 -25 57 43 -26 35 53 -25 40 41 -26 52 58 0.13 27 0 0 -25 39 43 23 48 32.1 60 42 -35 -25 20 35 -25 58 52 -25 3 30 -26 16 0 0.13 28 0 0 -25 2 5 23 48 19.6 61 41 -36 -24 42 54 -25 21 18 -24 25 46 -25 38 29 0.13 29 0 0 -24 23 55 23 48 6.9 62 41 -36 -24 4 40 -24 43 11 -23 47 29 -25 0 25 0.13 30 0 0 -23 45 14 23 47 54.0 63 40 -36 -23 25 56 -24 4 33 -23 8 42 -24 21 50 0.13 31 0 0 -23 6 2 23 47 40.8 64 39 -36 -22 46 40 -23 25 24 -22 29 24 -23 42 43 0.13 32 0 0 -22 26 19 23 47 27.5 65 38 -36 -22 6 55 -22 45 45 -21 49 36 -23 3 7 0.13 33 0 0 -21 46 8 23 47 13.9 66 37 -36 -21 26 41 -22 5 36 -21 9 19 -22 23 1 0.13 34 0 0 -21 5 28 23 47 0.2 67 36 -36 -20 45 58 -21 24 59 -20 28 34 -21 42 26 0.13 35 0 0 -20 24 21 23 46 46.2 68 35 -36 -20 4 49 -20 43 54 -19 47 22 -21 1 24 0.13 36 0 0 -19 42 47 23 46 32.0 70 33 -36 -19 23 12 -20 2 23 -19 5 44 -20 19 55 0.13 37 0 0 -19 0 48 23 46 17.7 71 32 -36 -18 41 11 -19 20 26 -18 23 40 -19 38 0 0.13 38 0 0 -18 18 25 23 46 3.2 72 31 -36 -17 58 46 -18 38 5 -17 41 13 -18 55 41 0.13 39 0 0 -17 35 39 23 45 48.5 73 29 -36 -17 15 58 -17 55 21 -16 58 23 -18 12 58 0.13 40 0 0 -16 52 31 23 45 33.6 74 27 -36 -16 32 48 -17 12 15 -16 15 12 -17 29 54 0.13 41 0 0 -16 9 2 23 45 18.6 75 25 -36 -15 49 17 -16 28 47 -15 31 40 -16 46 28 0.13 42 0 0 -15 25 13 23 45 3.5 76 23 -36 -15 5 27 -15 45 0 -14 47 48 -16 2 42 0.13 43 0 0 -14 41 7 23 44 48.2 77 20 -35 -14 21 20 -15 0 55 -14 3 39 -15 18 38 0.13 44 0 0 -13 56 44 23 44 32.8 78 17 -35 -13 36 55 -14 16 33 -13 19 14 -14 34 17 0.12 45 0 0 -13 12 5 23 44 17.3 79 14 -35 -12 52 16 -13 31 56 -12 34 34 -13 49 40 0.12 46 0 0 -12 27 12 23 44 1.6 80 9 -35 -12 7 22 -12 47 4 -11 49 40 -13 4 49 0.12 47 0 0 -11 42 7 23 43 45.9 81 5 -35 -11 22 17 -12 1 59 -11 4 33 -12 19 46 0.12 48 0 0 -10 56 51 23 43 30.1 81 359 -34 -10 37 0 -11 16 44 -10 19 16 -11 34 30 0.12 49 0 0 -10 11 26 23 43 14.2 82 352 -34 - 9 51 34 -10 31 18 - 9 33 50 -10 49 5 0.12 50 0 0 - 9 25 52 23 42 58.3 83 344 -34 - 9 6 1 - 9 45 45 - 8 48 17 -10 3 32 0.12 51 0 0 - 8 40 12 23 42 42.3 83 335 -34 - 8 20 21 - 9 0 5 - 8 2 37 - 9 17 51 0.12 52 0 0 - 7 54 27 23 42 26.2 83 325 -33 - 7 34 36 - 8 14 20 - 7 16 52 - 8 32 6 0.12 53 0 0 - 7 8 39 23 42 10.2 83 315 -33 - 6 48 48 - 7 28 31 - 6 31 5 - 7 46 17 0.12 54 0 0 - 6 22 49 23 41 54.1 83 305 -32 - 6 2 58 - 6 42 40 - 5 45 16 - 7 0 25 0.12 55 0 0 - 5 36 58 23 41 38.0 83 296 -32 - 5 17 9 - 5 56 49 - 4 59 27 - 6 14 34 0.12 56 0 0 - 4 51 9 23 41 21.9 82 288 -32 - 4 31 21 - 5 10 59 - 4 13 39 - 5 28 43 0.12 57 0 0 - 4 5 23 23 41 5.8 81 282 -31 - 3 45 36 - 4 25 12 - 3 27 56 - 4 42 54 0.12 58 0 0 - 3 19 42 23 40 49.8 80 276 -31 - 2 59 55 - 3 39 29 - 2 42 16 - 3 57 10 0.12 59 0 0 - 2 34 6 23 40 33.8 80 271 -30 - 2 14 21 - 2 53 52 - 1 56 43 - 3 11 32 0.12 60 0 0 - 1 48 38 23 40 17.9 79 267 -30 - 1 28 55 - 2 8 22 - 1 11 18 - 2 26 1 0.11 61 0 0 - 1 3 19 23 40 2.1 78 264 -30 - 0 43 37 - 1 23 1 - 0 26 3 - 1 40 38 0.11 62 0 0 - 0 18 10 23 39 46.3 77 261 -29 0 1 29 - 0 37 51 0 19 2 - 0 55 26 0.11 63 0 0 0 26 46 23 39 30.6 76 259 -29 0 46 24 0 7 8 1 3 55 - 0 10 26 0.11 64 0 0 1 11 29 23 39 15.0 74 257 -28 1 31 4 0 51 53 1 48 34 0 34 22 0.11 65 0 0 1 55 58 23 38 59.5 73 255 -28 2 15 30 1 36 24 2 32 57 1 18 54 0.11 66 0 0 2 40 9 23 38 44.2 72 254 -27 2 59 40 2 20 38 3 17 5 2 3 11 0.11 67 0 0 3 24 4 23 38 29.0 71 253 -26 3 43 31 3 4 35 4 0 54 2 47 10 0.11 68 0 0 4 7 39 23 38 13.9 70 252 -26 4 27 4 3 48 13 4 44 24 3 30 51 0.11 69 0 0 4 50 54 23 37 59.0 69 251 -25 5 10 16 4 31 32 5 27 34 4 14 12 0.11 70 0 0 5 33 48 23 37 44.2 68 250 -25 5 53 7 5 14 28 6 10 22 4 57 11 0.11 71 0 0 6 16 20 23 37 29.6 67 249 -24 6 35 35 5 57 3 6 52 48 5 39 48 0.11 72 0 0 6 58 27 23 37 15.2 66 249 -24 7 17 40 6 39 14 7 34 49 6 22 2 0.11 73 0 0 7 40 10 23 37 1.0 64 248 -23 7 59 19 7 21 0 8 16 26 7 3 51 0.11 74 0 0 8 21 27 23 36 46.9 63 248 -22 8 40 33 8 2 20 8 57 36 7 45 14 0.11 75 0 0 9 2 16 23 36 33.1 62 247 -22 9 21 19 8 43 13 9 38 19 8 26 11 0.11 76 0 0 9 42 39 23 36 19.4 61 247 -21 10 1 37 9 23 39 10 18 34 9 6 40 0.11 77 0 0 10 22 32 23 36 6.0 60 247 -20 10 41 27 10 3 36 10 58 21 9 46 40 0.11 78 0 0 11 1 55 23 35 52.8 59 246 -20 11 20 47 10 43 3 11 37 37 10 26 11 0.11 79 0 0 11 40 49 23 35 39.8 58 246 -19 11 59 36 11 22 0 12 16 23 11 5 11 0.11 80 0 0 12 19 11 23 35 27.0 57 246 -19 12 37 54 12 0 26 12 54 38 11 43 40 0.11 81 0 0 12 57 0 23 35 14.5 56 246 -18 13 15 40 12 38 20 13 32 20 12 21 38 0.11 82 0 0 13 34 18 23 35 2.1 54 246 -17 13 52 54 13 15 41 14 9 30 12 59 3 0.11 83 0 0 14 11 2 23 34 50.1 53 246 -17 14 29 34 13 52 29 14 46 7 13 35 55 0.10 84 0 0 14 47 12 23 34 38.2 52 246 -16 15 5 40 14 28 44 15 22 9 14 12 13 0.10 85 0 0 15 22 48 23 34 26.6 51 246 -15 15 41 12 15 4 24 15 57 38 14 47 56 0.10 86 0 0 15 57 49 23 34 15.3 50 246 -15 16 16 9 15 39 29 16 32 31 15 23 5 0.10 87 0 0 16 32 15 23 34 4.2 49 246 -14 16 50 30 16 13 59 17 6 49 15 57 39 0.10 88 0 0 17 6 5 23 33 53.3 48 246 -13 17 24 16 16 47 53 17 40 31 16 31 37 0.10 89 0 0 17 39 19 23 33 42.7 47 246 -13 17 57 26 17 21 11 18 13 37 17 4 59 0.10 90 0 0 18 11 56 23 33 32.3 46 247 -12 18 29 59 17 53 53 18 46 6 17 37 44 0.10 91 0 0 18 43 57 23 33 22.2 45 247 -11 19 1 56 18 25 58 19 17 59 18 9 53 0.10 92 0 0 19 15 21 23 33 12.3 44 247 -11 19 33 15 18 57 26 19 49 15 18 41 25 0.10 93 0 0 19 46 8 23 33 2.6 43 247 -10 20 3 58 19 28 17 20 19 54 19 12 19 0.10 94 0 0 20 16 17 23 32 53.3 42 247 -9 20 34 3 19 58 30 20 49 55 19 42 36 0.10 95 0 0 20 45 49 23 32 44.1 41 248 -9 21 3 31 20 28 6 21 19 19 20 12 16 0.10 96 0 0 21 14 43 23 32 35.2 40 248 -8 21 32 20 20 57 4 21 48 5 20 41 18 0.10 97 0 0 21 42 59 23 32 26.6 39 248 -7 22 0 33 21 25 25 22 16 14 21 9 42 0.10 98 0 0 22 10 37 23 32 18.1 38 248 -7 22 28 7 21 53 7 22 43 44 21 37 28 0.11 99 0 0 22 37 38 23 32 10.0 37 249 -6 22 55 4 22 20 12 23 10 37 22 4 37 0.11 100 0 0 23 4 1 23 32 2.0 36 249 -5 23 21 22 22 46 39 23 36 53 22 31 7 0.11 101 0 0 23 29 46 23 31 54.3 35 249 -5 23 47 3 23 12 28 24 2 30 22 56 59 0.11 102 0 0 23 54 53 23 31 46.9 34 250 -4 24 12 6 23 37 38 24 27 29 23 22 14 0.11 103 0 0 24 19 22 23 31 39.6 33 250 -4 24 36 31 24 2 11 24 51 51 23 46 50 0.11 104 0 0 24 43 13 23 31 32.6 32 250 -3 25 0 19 24 26 7 25 15 35 24 10 49 0.11 105 0 0 25 6 27 23 31 25.9 31 251 -2 25 23 29 24 49 24 25 38 42 24 34 10 0.11 106 0 0 25 29 3 23 31 19.3 30 251 -2 25 46 1 25 12 4 26 1 11 24 56 53 0.11 107 0 0 25 51 1 23 31 13.0 29 252 -1 26 7 56 25 34 6 26 23 3 25 18 58 0.11 108 0 0 26 12 22 23 31 6.9 28 252 0 26 29 14 25 55 31 26 44 17 25 40 26 0.11 109 0 0 26 33 6 23 31 1.0 27 252 0 26 49 54 26 16 18 27 4 54 26 1 16 0.11 110 0 0 26 53 13 23 30 55.4 26 253 1 27 9 57 26 36 28 27 24 54 26 21 30 0.11 111 0 0 27 12 43 23 30 49.9 25 253 2 27 29 24 26 56 1 27 44 18 26 41 6 0.11 112 0 0 27 31 35 23 30 44.7 24 254 2 27 48 13 27 14 57 28 3 4 27 0 5 0.11 113 0 0 27 49 52 23 30 39.7 23 254 3 28 6 26 27 33 17 28 21 14 27 18 27 0.11 114 0 0 28 7 31 23 30 34.9 22 254 3 28 24 2 27 50 59 28 38 48 27 36 12 0.11 115 0 0 28 24 34 23 30 30.2 22 255 4 28 41 2 28 8 5 28 55 45 27 53 21 0.11 116 0 0 28 41 1 23 30 25.8 21 255 5 28 57 26 28 24 35 29 12 6 28 9 54 0.11 117 0 0 28 56 52 23 30 21.6 20 256 5 29 13 14 28 40 29 29 27 52 28 25 50 0.11 118 0 0 29 12 7 23 30 17.6 19 256 6 29 28 26 28 55 46 29 43 1 28 41 10 0.11 119 0 0 29 26 46 23 30 13.8 18 257 6 29 43 3 29 10 28 29 57 35 28 55 54 0.11 120 0 0 29 40 49 23 30 10.2 17 257 7 29 57 4 29 24 34 30 11 34 29 10 3 0.11 121 0 0 29 54 17 23 30 6.8 16 258 8 30 10 29 29 38 5 30 24 57 29 23 35 0.11 122 0 0 30 7 10 23 30 3.5 15 258 8 30 23 19 29 51 0 30 37 45 29 36 33 0.12 123 0 0 30 19 27 23 30 0.5 14 259 9 30 35 35 30 3 20 30 49 58 29 48 54 0.12 124 0 0 30 31 10 23 29 57.6 14 259 9 30 47 15 30 15 4 31 1 37 30 0 41 0.12 125 0 0 30 42 17 23 29 54.9 13 260 10 30 58 20 30 26 14 31 12 40 30 11 53 0.12 126 0 0 30 52 50 23 29 52.4 12 260 11 31 8 51 30 36 49 31 23 9 30 22 29 0.12 127 0 0 31 2 49 23 29 50.1 11 261 11 31 18 48 30 46 49 31 33 4 30 32 31 0.12 128 0 0 31 12 12 23 29 48.0 10 261 12 31 28 9 30 56 15 31 42 24 30 41 58 0.12 129 0 0 31 21 2 23 29 46.0 9 262 12 31 36 57 31 5 6 31 51 10 30 50 51 0.12 130 0 0 31 29 17 23 29 44.3 8 262 13 31 45 11 31 13 22 31 59 22 30 59 9 0.12 131 0 0 31 36 57 23 29 42.7 8 263 14 31 52 50 31 21 5 32 7 0 31 6 53 0.12 132 0 0 31 44 4 23 29 41.2 7 263 14 31 59 55 31 28 13 32 14 5 31 14 2 0.13 133 0 0 31 50 37 23 29 40.0 6 264 15 32 6 27 31 34 47 32 20 35 31 20 37 0.13 134 0 0 31 56 36 23 29 38.9 5 264 15 32 12 24 31 40 46 32 26 31 31 26 38 0.13 135 0 0 32 2 0 23 29 38.0 4 265 16 32 17 48 31 46 12 32 31 54 31 32 5 0.13 136 0 0 32 6 51 23 29 37.2 3 265 17 32 22 38 31 51 4 32 36 43 31 36 57 0.14 137 0 0 32 11 8 23 29 36.7 2 266 17 32 26 54 31 55 22 32 40 59 31 41 16 0.15 138 0 0 32 14 52 23 29 36.3 2 266 18 32 30 37 31 59 6 32 44 41 31 45 1 0.16 139 0 0 32 18 1 23 29 36.0 1 267 18 32 33 45 32 2 16 32 47 49 31 48 11 0.21 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 440-046836 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 37 52.6891 DE: -02 11 08.651 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 37 52.6891 DE: -02 11 08.651 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (509) Iolanda asteroid class: approx. diameter [km]: 58 approx. diameter ["]: 0.033 distance from Earth [AU]: 2.39460 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#103 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): 0.019", 0.003", 103.356° remarks: * orbital elements for (509)Iolanda : Mean anomaly = 94.6236224993 deg Arg. of pericenter = 155.7918324327 deg Long. of node = 217.4749798179 deg Inclination = 15.4124665932 deg Eccentricity = 0.0980211346 Semimajor axis = 3.0620985459 AU Perihelion dist = 2.7619481720 AU Mag: H = 8.46, G = 0.15 Epoch of elements : MJD 60660.98772755 TDT (2024 Dec 16.9877) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1032023Apr27,6.97,2024,12,16,23.705459,0.074396,-0.092008,-3.635683,-2.942358,-0.003877,0.002526,0.000001,0.000000 48.1047,-2.2722,-176.56,-23.36,False UCAC4 440-046836,8.63130251,-2.1857362,12.32,11.99,11.81,0.0,0,,8.65260766,-2.2721821,1.85,1.64,0,0,0 509,Iolanda,13.63,57.737,2.3946,0,0,-0.890,-10.81,,2.8,0 0,94.4419,2024,12,16,155.7918,217.4750,15.4125,0.09802,3.06210,2.76195,8.46,5.0,0.15 1.447,0.0187,0.0025,103,0.0149,Known errors,0.84,0,-1,-1 20241216_046836,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org