IOTA/IOTA-ES occultation update for (4006) Sandler / UCAC4 564-040182 event on 2024 Sep 19, 02:50 UT Visible from Summary ------- On 2024 Sep 19 UT, the 15.966 km diameter asteroid (4006) Sandler will occult a 11.5 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.99 mag to 17.46 mag (the magnitude of the asteroid) for at most 0.500 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: 99 * date and approx. time of event: 2024 Sep 19, 02:48 - 2024 Sep 19, 02:53 * geocentric midpoint of event [JD]: 2460572.61855075 * magnitude of target star: 11.47 * magnitude drop [mag]: 5.99 * estimated maximum duration [s]: 0.500 * Moon: 99 % sunlit, 102° distance * Sun: 64° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 103°) * approx speed of asteroid's shadow [km/s]: 31.6906 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 564-040182 by 4006 Sandler on 2024 Sep 19 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 - 1 0 0 -31 13 37 2 48 19.6 1 63 -40 -31 20 24 -31 6 51 -31 23 34 -31 3 41 .... 0 0 0 -30 48 5 2 48 19.7 2 62 -39 -30 54 50 -30 41 20 -30 58 0 -30 38 11 0.54 1 0 0 -30 22 55 2 48 19.8 3 62 -39 -30 29 39 -30 16 12 -30 32 48 -30 13 4 0.71 2 0 0 -29 58 8 2 48 20.1 3 61 -38 -30 4 51 -29 51 26 -30 7 59 -29 48 19 0.79 3 0 0 -29 33 45 2 48 20.4 4 61 -38 -29 40 26 -29 27 5 -29 43 34 -29 23 57 0.83 4 0 0 -29 9 46 2 48 20.8 5 60 -37 -29 16 25 -29 3 7 -29 19 33 -29 0 1 0.86 5 0 0 -28 46 11 2 48 21.3 6 60 -36 -28 52 50 -28 39 34 -28 55 56 -28 36 28 0.88 6 0 0 -28 23 3 2 48 21.8 7 60 -36 -28 29 40 -28 16 27 -28 32 46 -28 13 22 0.89 7 0 0 -28 0 20 2 48 22.5 8 59 -35 -28 6 55 -27 53 45 -28 10 1 -27 50 41 0.90 8 0 0 -27 38 4 2 48 23.2 9 59 -34 -27 44 38 -27 31 30 -27 47 43 -27 28 26 0.91 9 0 0 -27 16 15 2 48 24.0 10 58 -33 -27 22 48 -27 9 43 -27 25 52 -27 6 39 0.92 10 0 0 -26 54 53 2 48 24.8 11 58 -33 -27 1 25 -26 48 23 -27 4 28 -26 45 20 0.92 11 0 0 -26 34 0 2 48 25.8 12 57 -32 -26 40 30 -26 27 31 -26 43 33 -26 24 29 0.93 12 0 0 -26 13 35 2 48 26.8 13 57 -31 -26 20 4 -26 7 7 -26 23 7 -26 4 6 0.93 13 0 0 -25 53 40 2 48 27.9 14 56 -30 -26 0 8 -25 47 13 -26 3 9 -25 44 12 0.94 14 0 0 -25 34 14 2 48 29.1 15 56 -29 -25 40 40 -25 27 48 -25 43 42 -25 24 48 0.94 15 0 0 -25 15 18 2 48 30.3 16 55 -29 -25 21 43 -25 8 53 -25 24 44 -25 5 53 0.94 16 0 0 -24 56 52 2 48 31.7 17 55 -28 -25 3 16 -24 50 28 -25 6 16 -24 47 29 0.95 17 0 0 -24 38 57 2 48 33.1 18 54 -27 -24 45 20 -24 32 34 -24 48 19 -24 29 36 0.95 18 0 0 -24 21 33 2 48 34.5 19 54 -26 -24 27 55 -24 15 12 -24 30 54 -24 12 13 0.95 19 0 0 -24 4 40 2 48 36.1 19 53 -25 -24 11 1 -23 58 20 -24 14 0 -23 55 22 0.95 20 0 0 -23 48 20 2 48 37.7 20 52 -24 -23 54 40 -23 42 0 -23 57 38 -23 39 3 0.96 21 0 0 -23 32 31 2 48 39.3 21 52 -24 -23 38 50 -23 26 13 -23 41 47 -23 23 16 0.96 22 0 0 -23 17 15 2 48 41.1 22 51 -23 -23 23 33 -23 10 57 -23 26 30 -23 8 1 0.96 23 0 0 -23 2 31 2 48 42.9 23 51 -22 -23 8 48 -22 56 14 -23 11 45 -22 53 18 0.96 24 0 0 -22 48 20 2 48 44.8 24 50 -21 -22 54 36 -22 42 4 -22 57 32 -22 39 9 0.96 25 0 0 -22 34 42 2 48 46.7 25 50 -20 -22 40 57 -22 28 27 -22 43 53 -22 25 32 0.96 26 0 0 -22 21 38 2 48 48.7 26 49 -19 -22 27 52 -22 15 24 -22 30 48 -22 12 29 0.96 27 0 0 -22 9 7 2 48 50.8 26 49 -18 -22 15 21 -22 2 54 -22 18 16 -21 59 59 0.97 28 0 0 -21 57 10 2 48 52.9 27 48 -17 -22 3 23 -21 50 58 -22 6 18 -21 48 4 0.97 29 0 0 -21 45 47 2 48 55.1 28 47 -16 -21 51 59 -21 39 35 -21 54 54 -21 36 42 0.97 30 0 0 -21 34 58 2 48 57.3 29 47 -16 -21 41 10 -21 28 47 -21 44 4 -21 25 54 0.97 31 0 0 -21 24 43 2 48 59.6 30 46 -15 -21 30 54 -21 18 33 -21 33 48 -21 15 40 0.97 32 0 0 -21 15 3 2 49 2.0 30 45 -14 -21 21 14 -21 8 54 -21 24 7 -21 6 1 0.97 33 0 0 -21 5 58 2 49 4.4 31 45 -13 -21 12 8 -20 59 49 -21 15 1 -20 56 57 0.97 34 0 0 -20 57 28 2 49 6.9 32 44 -12 -21 3 37 -20 51 19 -21 6 30 -20 48 27 0.97 35 0 0 -20 49 32 2 49 9.4 33 43 -11 -20 55 41 -20 43 24 -20 58 33 -20 40 32 0.97 36 0 0 -20 42 11 2 49 11.9 33 42 -10 -20 48 20 -20 36 4 -20 51 12 -20 33 12 0.97 37 0 0 -20 35 26 2 49 14.5 34 42 -9 -20 41 34 -20 29 19 -20 44 26 -20 26 27 0.97 38 0 0 -20 29 16 2 49 17.2 35 41 -8 -20 35 23 -20 23 9 -20 38 15 -20 20 18 0.98 39 0 0 -20 23 41 2 49 19.9 36 40 -7 -20 29 48 -20 17 34 -20 32 40 -20 14 43 0.98 40 0 0 -20 18 41 2 49 22.7 36 39 -6 -20 24 48 -20 12 35 -20 27 40 -20 9 44 0.98 41 0 0 -20 14 17 2 49 25.5 37 38 -5 -20 20 24 -20 8 12 -20 23 16 -20 5 21 0.98 42 0 0 -20 10 29 2 49 28.3 37 37 -4 -20 16 35 -20 4 24 -20 19 27 -20 1 33 0.98 43 0 0 -20 7 16 2 49 31.2 38 36 -3 -20 13 22 -20 1 11 -20 16 14 -19 58 20 0.98 44 0 0 -20 4 39 2 49 34.1 39 36 -2 -20 10 45 -19 58 34 -20 13 37 -19 55 43 0.98 45 0 0 -20 2 38 2 49 37.0 39 35 -1 -20 8 44 -19 56 33 -20 11 35 -19 53 42 0.98 46 0 0 -20 1 12 2 49 40.0 40 34 0 -20 7 18 -19 55 7 -20 10 10 -19 52 17 0.98 47 0 0 -20 0 23 2 49 43.1 40 33 0 -20 6 28 -19 54 18 -20 9 20 -19 51 27 0.98 48 0 0 -20 0 9 2 49 46.1 41 32 1 -20 6 15 -19 54 4 -20 9 6 -19 51 13 0.98 49 0 0 -20 0 31 2 49 49.2 41 30 2 -20 6 37 -19 54 26 -20 9 28 -19 51 35 0.98 50 0 0 -20 1 29 2 49 52.3 42 29 3 -20 7 35 -19 55 24 -20 10 26 -19 52 33 0.98 51 0 0 -20 3 3 2 49 55.5 42 28 4 -20 9 9 -19 56 58 -20 12 0 -19 54 7 0.98 52 0 0 -20 5 12 2 49 58.6 43 27 5 -20 11 19 -19 59 7 -20 14 10 -19 56 16 0.98 53 0 0 -20 7 58 2 50 1.8 43 26 6 -20 14 4 -20 1 52 -20 16 56 -19 59 1 0.98 54 0 0 -20 11 19 2 50 5.1 43 25 7 -20 17 26 -20 5 13 -20 20 17 -20 2 22 0.98 55 0 0 -20 15 16 2 50 8.3 44 24 8 -20 21 23 -20 9 10 -20 24 15 -20 6 19 0.98 56 0 0 -20 19 49 2 50 11.6 44 22 9 -20 25 56 -20 13 43 -20 28 48 -20 10 51 0.98 57 0 0 -20 24 58 2 50 14.8 44 21 10 -20 31 5 -20 18 51 -20 33 57 -20 15 59 0.99 58 0 0 -20 30 42 2 50 18.1 45 20 11 -20 36 50 -20 24 35 -20 39 42 -20 21 43 0.99 59 0 0 -20 37 2 2 50 21.5 45 19 12 -20 43 10 -20 30 54 -20 46 2 -20 28 2 0.99 60 0 0 -20 43 57 2 50 24.8 45 17 13 -20 50 6 -20 37 49 -20 52 59 -20 34 57 0.99 61 0 0 -20 51 28 2 50 28.1 45 16 14 -20 57 37 -20 45 19 -21 0 30 -20 42 27 0.99 62 0 0 -20 59 34 2 50 31.5 45 15 15 -21 5 44 -20 53 25 -21 8 37 -20 50 32 0.99 63 0 0 -21 8 16 2 50 34.8 45 13 16 -21 14 26 -21 2 6 -21 17 19 -20 59 13 0.99 64 0 0 -21 17 32 2 50 38.2 45 12 16 -21 23 43 -21 11 22 -21 26 37 -21 8 29 0.99 65 0 0 -21 27 24 2 50 41.6 45 11 17 -21 33 35 -21 21 13 -21 36 30 -21 18 20 0.99 66 0 0 -21 37 50 2 50 44.9 45 9 18 -21 44 3 -21 31 39 -21 46 57 -21 28 45 0.99 67 0 0 -21 48 52 2 50 48.3 45 8 19 -21 55 5 -21 42 39 -21 58 0 -21 39 45 0.99 68 0 0 -22 0 28 2 50 51.7 45 7 20 -22 6 42 -21 54 15 -22 9 37 -21 51 20 0.99 69 0 0 -22 12 38 2 50 55.0 45 5 21 -22 18 53 -22 6 24 -22 21 48 -22 3 30 0.99 70 0 0 -22 25 23 2 50 58.4 45 4 22 -22 31 38 -22 19 8 -22 34 34 -22 16 13 0.99 71 0 0 -22 38 42 2 51 1.8 45 3 23 -22 44 58 -22 32 26 -22 47 54 -22 29 31 0.99 72 0 0 -22 52 34 2 51 5.1 45 1 24 -22 58 52 -22 46 18 -23 1 48 -22 43 22 0.99 73 0 0 -23 7 1 2 51 8.4 44 0 24 -23 13 19 -23 0 43 -23 16 16 -22 57 47 0.99 74 0 0 -23 22 1 2 51 11.8 44 359 25 -23 28 20 -23 15 42 -23 31 17 -23 12 45 0.99 75 0 0 -23 37 34 2 51 15.1 44 357 26 -23 43 54 -23 31 14 -23 46 52 -23 28 17 0.99 76 0 0 -23 53 39 2 51 18.4 44 356 27 -24 0 0 -23 47 19 -24 2 59 -23 44 21 0.99 77 0 0 -24 10 18 2 51 21.6 43 355 28 -24 16 40 -24 3 56 -24 19 39 -24 0 58 0.99 78 0 0 -24 27 28 2 51 24.9 43 354 29 -24 33 52 -24 21 6 -24 36 51 -24 18 7 0.99 79 0 0 -24 45 11 2 51 28.1 42 352 29 -24 51 35 -24 38 47 -24 54 36 -24 35 48 0.99 80 0 0 -25 3 25 2 51 31.4 42 351 30 -25 9 51 -24 57 0 -25 12 52 -24 54 1 0.99 81 0 0 -25 22 11 2 51 34.5 42 350 31 -25 28 38 -25 15 45 -25 31 39 -25 12 44 0.99 82 0 0 -25 41 27 2 51 37.7 41 349 32 -25 47 55 -25 35 0 -25 50 57 -25 31 59 0.99 83 0 0 -26 1 14 2 51 40.8 41 348 32 -26 7 44 -25 54 46 -26 10 46 -25 51 44 0.99 84 0 0 -26 21 31 2 51 43.9 40 347 33 -26 28 2 -26 15 1 -26 31 5 -26 11 59 0.99 85 0 0 -26 42 18 2 51 47.0 39 345 34 -26 48 50 -26 35 47 -26 51 53 -26 32 44 0.99 86 0 0 -27 3 34 2 51 50.0 39 344 35 -27 10 7 -26 57 1 -27 13 11 -26 53 58 0.99 87 0 0 -27 25 18 2 51 53.0 38 343 35 -27 31 53 -27 18 44 -27 34 57 -27 15 40 0.99 88 0 0 -27 47 31 2 51 55.9 38 342 36 -27 54 6 -27 40 55 -27 57 12 -27 37 51 0.99 89 0 0 -28 10 11 2 51 58.8 37 341 37 -28 16 48 -28 3 34 -28 19 54 -28 0 29 0.99 90 0 0 -28 33 18 2 52 1.7 36 340 37 -28 39 57 -28 26 40 -28 43 4 -28 23 34 0.99 91 0 0 -28 56 52 2 52 4.5 36 339 38 -29 3 32 -28 50 12 -29 6 39 -28 47 6 0.99 92 0 0 -29 20 51 2 52 7.3 35 338 38 -29 27 33 -29 14 11 -29 30 41 -29 11 3 0.99 93 0 0 -29 45 16 2 52 10.0 34 337 39 -29 51 59 -29 38 34 -29 55 8 -29 35 26 0.99 94 0 0 -30 10 5 2 52 12.7 34 336 40 -30 16 50 -30 3 22 -30 19 59 -30 0 13 0.99 95 0 0 -30 35 19 2 52 15.3 33 335 40 -30 42 5 -30 28 33 -30 45 15 -30 25 24 0.99 96 0 0 -31 0 55 2 52 17.8 32 334 41 -31 7 42 -30 54 8 -31 10 53 -30 50 58 0.99 97 0 0 -31 26 54 2 52 20.3 31 334 41 -31 33 43 -31 20 6 -31 36 54 -31 16 55 0.99 98 0 0 -31 53 14 2 52 22.8 31 333 42 -32 0 5 -31 46 25 -32 3 17 -31 43 13 0.99 99 0 0 -32 19 56 2 52 25.2 30 332 42 -32 26 48 -32 13 5 -32 30 1 -32 9 52 0.99 100 0 0 -32 46 57 2 52 27.5 29 331 42 -32 53 51 -32 40 4 -32 57 4 -32 36 52 0.99 101 0 0 -33 14 18 2 52 29.8 28 330 43 -33 21 13 -33 7 24 -33 24 27 -33 4 10 0.99 102 0 0 -33 41 57 2 52 32.0 27 329 43 -33 48 53 -33 35 1 -33 52 9 -33 31 47 0.99 103 0 0 -34 9 54 2 52 34.1 26 329 43 -34 16 52 -34 2 56 -34 20 8 -33 59 42 0.99 104 0 0 -34 38 7 2 52 36.2 26 328 44 -34 45 6 -34 31 8 -34 48 23 -34 27 53 0.99 105 0 0 -35 6 36 2 52 38.2 25 327 44 -35 13 37 -34 59 36 -35 16 54 -34 56 19 0.99 106 0 0 -35 35 19 2 52 40.1 24 326 44 -35 42 22 -35 28 18 -35 45 40 -35 25 1 0.99 107 0 0 -36 4 17 2 52 42.0 23 325 44 -36 11 21 -35 57 14 -36 14 39 -35 53 56 0.99 108 0 0 -36 33 27 2 52 43.8 22 325 45 -36 40 32 -36 26 22 -36 43 52 -36 23 4 0.99 109 0 0 -37 2 49 2 52 45.5 21 324 45 -37 9 56 -36 55 43 -37 13 16 -36 52 24 0.99 110 0 0 -37 32 21 2 52 47.2 20 323 45 -37 39 30 -37 25 14 -37 42 51 -37 21 54 0.99 111 0 0 -38 2 4 2 52 48.7 20 322 45 -38 9 14 -37 54 55 -38 12 35 -37 51 35 0.99 112 0 0 -38 31 55 2 52 50.2 19 322 45 -38 39 6 -38 24 45 -38 42 28 -38 21 24 0.99 113 0 0 -39 1 54 2 52 51.7 18 321 45 -39 9 6 -38 54 43 -39 12 29 -38 51 21 0.99 114 0 0 -39 31 59 2 52 53.0 17 320 45 -39 39 13 -39 24 47 -39 42 36 -39 21 25 0.99 115 0 0 -40 2 10 2 52 54.3 16 320 45 -40 9 25 -39 54 56 -40 12 49 -39 51 34 0.99 116 0 0 -40 32 26 2 52 55.6 15 319 45 -40 39 42 -40 25 11 -40 43 6 -40 21 47 0.99 117 0 0 -41 2 44 2 52 56.7 14 318 45 -41 10 2 -40 55 28 -41 13 27 -40 52 4 0.99 118 0 0 -41 33 5 2 52 57.8 13 317 44 -41 40 24 -41 25 48 -41 43 50 -41 22 23 1.00 119 0 0 -42 3 27 2 52 58.8 13 317 44 -42 10 47 -41 56 9 -42 14 13 -41 52 44 1.00 120 0 0 -42 33 50 2 52 59.7 12 316 44 -42 41 10 -42 26 30 -42 44 37 -42 23 5 1.00 121 0 0 -43 4 11 2 53 0.5 11 315 44 -43 11 33 -42 56 50 -43 15 0 -42 53 24 1.00 122 0 0 -43 34 30 2 53 1.3 10 315 44 -43 41 53 -43 27 8 -43 45 20 -43 23 42 1.00 123 0 0 -44 4 46 2 53 2.0 9 314 43 -44 12 10 -43 57 23 -44 15 38 -43 53 57 1.00 124 0 0 -44 34 58 2 53 2.7 8 313 43 -44 42 22 -44 27 34 -44 45 51 -44 24 7 1.00 125 0 0 -45 5 4 2 53 3.3 7 312 43 -45 12 30 -44 57 40 -45 15 59 -44 54 13 1.01 126 0 0 -45 35 5 2 53 3.8 6 312 42 -45 42 31 -45 27 40 -45 46 0 -45 24 12 1.01 127 0 0 -46 4 58 2 53 4.2 6 311 42 -46 12 24 -45 57 32 -46 15 54 -45 54 4 1.01 128 0 0 -46 34 42 2 53 4.6 5 310 42 -46 42 10 -46 27 16 -46 45 40 -46 23 48 1.02 129 0 0 -47 4 18 2 53 4.9 4 309 41 -47 11 46 -46 56 51 -47 15 16 -46 53 23 1.03 130 0 0 -47 33 43 2 53 5.1 3 309 41 -47 41 12 -47 26 16 -47 44 42 -47 22 47 1.04 131 0 0 -48 2 57 2 53 5.3 2 308 41 -48 10 26 -47 55 30 -48 13 57 -47 52 1 1.06 132 0 0 -48 31 59 2 53 5.4 1 307 40 -48 39 29 -48 24 31 -48 42 59 -48 21 2 1.10 133 0 0 -49 0 49 2 53 5.5 1 306 40 -49 8 18 -48 53 20 -49 11 49 -48 49 51 1.24 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 564-040182 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 35 48.7383 DE: +22 37 02.358 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 35 48.7384 DE: +22 37 02.358 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.5 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4006) Sandler asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.31870 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.016", 0.002", 102.668° remarks: * orbital elements for (4006)Sandler : Mean anomaly = 19.5661519187 deg Arg. of pericenter = 124.1155510958 deg Long. of node = 293.6320599078 deg Inclination = 2.3924095029 deg Eccentricity = 0.1849435778 Semimajor axis = 2.5150971448 AU Perihelion dist = 2.0499460803 AU Mag: H = 12.86, G = 0.15 Epoch of elements : MJD 60572.11855050 TDT (2024 Sep 19.1186) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,0.50,2024,9,19,2.845218,-0.125806,-0.690463,17.595194,-3.218083,-0.004674,0.000816,-0.000001,0.000000 73.1325,22.5639,135.76,1.32,False UCAC4 564-040182,7.59687171,22.6173217,12.02,11.47,11.17,0.0,0,,7.62128450,22.5639148,5.99,5.84,0,0,0 4006,Sandler,17.46,15.966,2.3187,0,0,4.817,-12.21,,1.2,0 0,19.5369,2024,9,19,124.1156,293.6321,2.3924,0.18494,2.51510,2.04995,12.86,5.0,0.15 1.234,0.0160,0.0021,103,0.0022,Known errors,0.93,0,-1,-1 20240919_040182,60140.57 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org