IOTA/IOTA-ES occultation update for (2688) Halley / UCAC4 562-030525 event on 2024 Oct 04, 21:20 UT Visible from Summary ------- On 2024 Oct 04 UT, the 21.519 km diameter asteroid (2688) Halley will occult a 11.1 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 7.14 mag to 18.19 mag (the magnitude of the asteroid) for at most 1.980 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: 97 * date and approx. time of event: 2024 Oct 04, 21:11 - 2024 Oct 04, 21:29 * geocentric midpoint of event [JD]: 2460588.38925938 * magnitude of target star: 11.05 * magnitude drop [mag]: 7.14 * estimated maximum duration [s]: 1.980 * Moon: 4 % sunlit, 117° distance * Sun: 95° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 92°) * approx speed of asteroid's shadow [km/s]: 10.8626 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 562-030525 by 2688 Halley on 2024 Oct 4 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 49 0 0 -28 5 18 21 12 11.0 0 64 -56 -28 12 49 -27 57 48 -28 18 29 -27 52 9 .... 50 0 0 -27 39 55 21 12 11.2 1 64 -56 -27 47 25 -27 32 25 -27 53 5 -27 26 46 0.22 51 0 0 -27 14 33 21 12 11.5 2 63 -56 -27 22 3 -27 7 4 -27 27 43 -27 1 26 0.38 52 0 0 -26 49 15 21 12 12.1 3 63 -56 -26 56 44 -26 41 46 -27 2 23 -26 36 8 0.45 53 0 0 -26 24 0 21 12 12.8 4 63 -56 -26 31 29 -26 16 31 -26 37 7 -26 10 54 0.48 54 0 0 -25 58 49 21 12 13.8 5 62 -56 -26 6 17 -25 51 21 -26 11 56 -25 45 44 0.50 55 0 0 -25 33 43 21 12 14.9 6 62 -56 -25 41 11 -25 26 16 -25 46 49 -25 20 39 0.52 56 0 0 -25 8 43 21 12 16.3 7 61 -56 -25 16 11 -25 1 17 -25 21 48 -24 55 40 0.53 57 0 0 -24 43 50 21 12 17.9 8 61 -56 -24 51 16 -24 36 23 -24 56 54 -24 30 48 0.53 58 0 0 -24 19 3 21 12 19.7 9 60 -56 -24 26 29 -24 11 38 -24 32 6 -24 6 2 0.54 59 0 0 -23 54 25 21 12 21.8 10 60 -55 -24 1 50 -23 47 0 -24 7 26 -23 41 25 0.55 60 0 0 -23 29 54 21 12 24.0 11 60 -55 -23 37 19 -23 22 30 -23 42 55 -23 16 56 0.55 61 0 0 -23 5 34 21 12 26.4 12 59 -55 -23 12 58 -22 58 10 -23 18 33 -22 52 36 0.55 62 0 0 -22 41 23 21 12 29.1 13 59 -55 -22 48 46 -22 34 0 -22 54 21 -22 28 26 0.56 63 0 0 -22 17 22 21 12 32.0 14 58 -54 -22 24 45 -22 10 0 -22 30 19 -22 4 27 0.56 64 0 0 -21 53 33 21 12 35.1 15 58 -54 -22 0 55 -21 46 11 -22 6 29 -21 40 39 0.56 65 0 0 -21 29 56 21 12 38.4 16 57 -53 -21 37 18 -21 22 35 -21 42 51 -21 17 3 0.56 66 0 0 -21 6 32 21 12 41.9 17 57 -53 -21 13 52 -20 59 11 -21 19 25 -20 53 40 0.57 67 0 0 -20 43 20 21 12 45.6 18 57 -52 -20 50 40 -20 36 1 -20 56 13 -20 30 30 0.57 68 0 0 -20 20 23 21 12 49.6 19 56 -52 -20 27 42 -20 13 4 -20 33 14 -20 7 34 0.57 69 0 0 -19 57 40 21 12 53.7 20 56 -51 -20 4 59 -19 50 22 -20 10 30 -19 44 53 0.57 70 0 0 -19 35 13 21 12 58.1 21 55 -51 -19 42 31 -19 27 56 -19 48 1 -19 22 26 0.57 71 0 0 -19 13 1 21 13 2.7 22 55 -50 -19 20 18 -19 5 45 -19 25 48 -19 0 16 0.58 72 0 0 -18 51 6 21 13 7.4 23 54 -50 -18 58 22 -18 43 50 -19 3 52 -18 38 22 0.58 73 0 0 -18 29 28 21 13 12.4 24 54 -49 -18 36 43 -18 22 13 -18 42 12 -18 16 45 0.58 74 0 0 -18 8 7 21 13 17.6 25 53 -48 -18 15 22 -18 0 53 -18 20 50 -17 55 26 0.58 75 0 0 -17 47 5 21 13 23.0 26 53 -48 -17 54 19 -17 39 51 -17 59 46 -17 34 25 0.58 76 0 0 -17 26 21 21 13 28.5 27 53 -47 -17 33 34 -17 19 8 -17 39 1 -17 13 42 0.58 77 0 0 -17 5 56 21 13 34.3 28 52 -46 -17 13 9 -16 58 44 -17 18 35 -16 53 19 0.58 78 0 0 -16 45 51 21 13 40.2 29 52 -46 -16 53 3 -16 38 40 -16 58 29 -16 33 16 0.58 79 0 0 -16 26 7 21 13 46.4 30 51 -45 -16 33 18 -16 18 57 -16 38 43 -16 13 33 0.58 80 0 0 -16 6 43 21 13 52.7 31 51 -44 -16 13 53 -15 59 34 -16 19 18 -15 54 10 0.59 81 0 0 -15 47 41 21 13 59.2 32 50 -43 -15 54 50 -15 40 32 -16 0 14 -15 35 9 0.59 82 0 0 -15 29 0 21 14 5.9 33 50 -43 -15 36 9 -15 21 52 -15 41 32 -15 16 30 0.59 83 0 0 -15 10 42 21 14 12.8 34 49 -42 -15 17 50 -15 3 35 -15 23 12 -14 58 13 0.59 84 0 0 -14 52 46 21 14 19.8 35 48 -41 -14 59 53 -14 45 40 -15 5 15 -14 40 19 0.59 85 0 0 -14 35 13 21 14 27.0 36 48 -40 -14 42 20 -14 28 8 -14 47 41 -14 22 47 0.59 86 0 0 -14 18 4 21 14 34.4 37 47 -39 -14 25 10 -14 10 59 -14 30 31 -14 5 39 0.59 87 0 0 -14 1 19 21 14 41.9 38 47 -38 -14 8 24 -13 54 15 -14 13 44 -13 48 55 0.59 88 0 0 -13 44 58 21 14 49.6 39 46 -37 -13 52 2 -13 37 55 -13 57 22 -13 32 36 0.59 89 0 0 -13 29 2 21 14 57.4 39 45 -37 -13 36 5 -13 21 59 -13 41 25 -13 16 41 0.59 90 0 0 -13 13 31 21 15 5.4 40 45 -36 -13 20 33 -13 6 29 -13 25 52 -13 1 11 0.59 91 0 0 -12 58 25 21 15 13.6 41 44 -35 -13 5 27 -12 51 23 -13 10 45 -12 46 6 0.59 92 0 0 -12 43 45 21 15 21.8 42 43 -34 -12 50 46 -12 36 44 -12 56 4 -12 31 27 0.60 93 0 0 -12 29 31 21 15 30.3 43 42 -33 -12 36 31 -12 22 31 -12 41 49 -12 17 14 0.60 94 0 0 -12 15 43 21 15 38.8 44 42 -32 -12 22 43 -12 8 43 -12 28 0 -12 3 28 0.60 95 0 0 -12 2 22 21 15 47.5 45 41 -31 -12 9 21 -11 55 23 -12 14 38 -11 50 8 0.60 96 0 0 -11 49 28 21 15 56.3 46 40 -30 -11 56 26 -11 42 29 -12 1 42 -11 37 15 0.60 97 0 0 -11 37 1 21 16 5.2 46 39 -29 -11 43 59 -11 30 3 -11 49 14 -11 24 48 0.60 98 0 0 -11 25 1 21 16 14.3 47 38 -28 -11 31 59 -11 18 4 -11 37 14 -11 12 50 0.60 99 0 0 -11 13 29 21 16 23.5 48 37 -27 -11 20 26 -11 6 33 -11 25 41 -11 1 19 0.60 100 0 0 -11 2 25 21 16 32.7 49 36 -26 -11 9 22 -10 55 29 -11 14 36 -10 50 16 0.60 101 0 0 -10 51 49 21 16 42.1 49 35 -25 -10 58 45 -10 44 54 -11 3 59 -10 39 41 0.60 102 0 0 -10 41 42 21 16 51.6 50 34 -24 -10 48 37 -10 34 47 -10 53 51 -10 29 34 0.60 103 0 0 -10 32 3 21 17 1.1 51 33 -23 -10 38 58 -10 25 8 -10 44 11 -10 19 56 0.60 104 0 0 -10 22 52 21 17 10.8 51 32 -22 -10 29 47 -10 15 58 -10 35 0 -10 10 47 0.60 105 0 0 -10 14 11 21 17 20.6 52 31 -21 -10 21 5 -10 7 17 -10 26 17 -10 2 6 0.60 106 0 0 -10 5 59 21 17 30.4 53 29 -20 -10 12 52 - 9 59 5 -10 18 4 - 9 53 54 0.60 107 0 0 - 9 58 15 21 17 40.3 53 28 -19 -10 5 9 - 9 51 23 -10 10 21 - 9 46 12 0.60 108 0 0 - 9 51 2 21 17 50.3 54 27 -18 - 9 57 55 - 9 44 9 -10 3 6 - 9 38 59 0.60 109 0 0 - 9 44 17 21 18 0.3 54 25 -17 - 9 51 10 - 9 37 25 - 9 56 21 - 9 32 15 0.60 110 0 0 - 9 38 2 21 18 10.5 55 24 -16 - 9 44 55 - 9 31 11 - 9 50 6 - 9 26 0 0.61 111 0 0 - 9 32 17 21 18 20.6 56 23 -15 - 9 39 9 - 9 25 26 - 9 44 20 - 9 20 16 0.61 112 0 0 - 9 27 2 21 18 30.9 56 21 -14 - 9 33 54 - 9 20 11 - 9 39 4 - 9 15 1 0.61 113 0 0 - 9 22 16 21 18 41.2 56 19 -13 - 9 29 8 - 9 15 25 - 9 34 18 - 9 10 16 0.61 114 0 0 - 9 18 1 21 18 51.5 57 18 -12 - 9 24 52 - 9 11 10 - 9 30 3 - 9 6 1 0.61 115 0 0 - 9 14 16 21 19 1.9 57 16 -11 - 9 21 7 - 9 7 25 - 9 26 17 - 9 2 16 0.61 116 0 0 - 9 11 0 21 19 12.3 57 14 -10 - 9 17 51 - 9 4 10 - 9 23 1 - 8 59 1 0.61 117 0 0 - 9 8 15 21 19 22.7 58 13 -9 - 9 15 6 - 9 1 25 - 9 20 16 - 8 56 16 0.61 118 0 0 - 9 6 0 21 19 33.2 58 11 -8 - 9 12 51 - 8 59 10 - 9 18 1 - 8 54 1 0.61 119 0 0 - 9 4 16 21 19 43.7 58 9 -7 - 9 11 6 - 8 57 26 - 9 16 16 - 8 52 17 0.61 120 0 0 - 9 3 1 21 19 54.3 58 7 -6 - 9 9 52 - 8 56 11 - 9 15 2 - 8 51 3 0.61 121 0 0 - 9 2 17 21 20 4.8 59 6 -5 - 9 9 8 - 8 55 27 - 9 14 18 - 8 50 19 0.61 122 0 0 - 9 2 4 21 20 15.4 59 4 -4 - 9 8 54 - 8 55 14 - 9 14 4 - 8 50 5 0.61 123 0 0 - 9 2 21 21 20 25.9 59 2 -3 - 9 9 11 - 8 55 31 - 9 14 21 - 8 50 22 0.61 124 0 0 - 9 3 8 21 20 36.5 59 360 -2 - 9 9 58 - 8 56 18 - 9 15 8 - 8 51 9 0.61 125 0 0 - 9 4 25 21 20 47.1 59 358 -1 - 9 11 16 - 8 57 35 - 9 16 25 - 8 52 26 0.61 126 0 0 - 9 6 13 21 20 57.6 59 356 0 - 9 13 4 - 8 59 23 - 9 18 13 - 8 54 14 0.61 127 0 0 - 9 8 31 21 21 8.2 58 354 1 - 9 15 22 - 9 1 40 - 9 20 32 - 8 56 32 0.61 128 0 0 - 9 11 19 21 21 18.7 58 353 2 - 9 18 10 - 9 4 29 - 9 23 20 - 8 59 20 0.61 129 0 0 - 9 14 37 21 21 29.2 58 351 3 - 9 21 29 - 9 7 47 - 9 26 39 - 9 2 38 0.61 130 0 0 - 9 18 26 21 21 39.7 58 349 4 - 9 25 17 - 9 11 35 - 9 30 28 - 9 6 26 0.61 131 0 0 - 9 22 44 21 21 50.2 58 347 5 - 9 29 36 - 9 15 53 - 9 34 47 - 9 10 44 0.61 132 0 0 - 9 27 33 21 22 0.6 57 346 6 - 9 34 25 - 9 20 42 - 9 39 36 - 9 15 32 0.61 133 0 0 - 9 32 52 21 22 11.0 57 344 7 - 9 39 44 - 9 26 0 - 9 44 55 - 9 20 50 0.61 134 0 0 - 9 38 40 21 22 21.4 56 342 8 - 9 45 33 - 9 31 48 - 9 50 44 - 9 26 38 0.61 135 0 0 - 9 44 58 21 22 31.7 56 341 9 - 9 51 51 - 9 38 6 - 9 57 3 - 9 32 56 0.61 136 0 0 - 9 51 46 21 22 42.0 56 339 10 - 9 58 39 - 9 44 54 -10 3 51 - 9 39 43 0.61 137 0 0 - 9 59 4 21 22 52.2 55 338 11 -10 5 57 - 9 52 11 -10 11 9 - 9 47 0 0.61 138 0 0 -10 6 50 21 23 2.3 55 336 12 -10 13 44 - 9 59 57 -10 18 57 - 9 54 46 0.61 139 0 0 -10 15 7 21 23 12.4 54 335 13 -10 22 1 -10 8 13 -10 27 13 -10 3 1 0.61 140 0 0 -10 23 52 21 23 22.4 53 333 14 -10 30 46 -10 16 58 -10 35 59 -10 11 46 0.61 141 0 0 -10 33 6 21 23 32.4 53 332 15 -10 40 1 -10 26 11 -10 45 14 -10 20 59 0.61 142 0 0 -10 42 49 21 23 42.2 52 331 16 -10 49 45 -10 35 54 -10 54 58 -10 30 41 0.61 143 0 0 -10 53 0 21 23 52.0 52 330 17 -10 59 57 -10 46 5 -11 5 11 -10 40 52 0.61 144 0 0 -11 3 40 21 24 1.7 51 328 18 -11 10 37 -10 56 44 -11 15 51 -10 51 31 0.61 145 0 0 -11 14 49 21 24 11.3 50 327 19 -11 21 46 -11 7 52 -11 27 1 -11 2 38 0.61 146 0 0 -11 26 25 21 24 20.8 49 326 20 -11 33 23 -11 19 27 -11 38 38 -11 14 13 0.61 147 0 0 -11 38 29 21 24 30.3 49 325 22 -11 45 27 -11 31 31 -11 50 43 -11 26 16 0.61 148 0 0 -11 51 0 21 24 39.6 48 324 23 -11 57 59 -11 44 2 -12 3 15 -11 38 47 0.61 149 0 0 -12 3 59 21 24 48.8 47 323 24 -12 10 59 -11 57 0 -12 16 15 -11 51 45 0.61 150 0 0 -12 17 25 21 24 57.8 46 322 25 -12 24 25 -12 10 25 -12 29 42 -12 5 9 0.61 151 0 0 -12 31 17 21 25 6.8 46 321 26 -12 38 18 -12 24 17 -12 43 36 -12 19 1 0.61 152 0 0 -12 45 36 21 25 15.7 45 321 27 -12 52 38 -12 38 35 -12 57 56 -12 33 18 0.61 153 0 0 -13 0 22 21 25 24.4 44 320 28 -13 7 24 -12 53 20 -13 12 42 -12 48 2 0.61 154 0 0 -13 15 33 21 25 33.0 43 319 29 -13 22 36 -13 8 30 -13 27 55 -13 3 12 0.60 155 0 0 -13 31 9 21 25 41.4 42 318 30 -13 38 13 -13 24 6 -13 43 32 -13 18 47 0.60 156 0 0 -13 47 11 21 25 49.7 41 317 31 -13 54 15 -13 40 7 -13 59 35 -13 34 48 0.60 157 0 0 -14 3 37 21 25 57.9 40 317 32 -14 10 42 -13 56 32 -14 16 3 -13 51 13 0.60 158 0 0 -14 20 28 21 26 5.9 40 316 33 -14 27 34 -14 13 22 -14 32 55 -14 8 2 0.60 159 0 0 -14 37 42 21 26 13.8 39 315 34 -14 44 49 -14 30 36 -14 50 11 -14 25 16 0.60 160 0 0 -14 55 21 21 26 21.5 38 315 35 -15 2 28 -14 48 14 -15 7 51 -14 42 53 0.60 161 0 0 -15 13 22 21 26 29.1 37 314 35 -15 20 31 -15 6 15 -15 25 54 -15 0 53 0.60 162 0 0 -15 31 47 21 26 36.5 36 313 36 -15 38 56 -15 24 38 -15 44 19 -15 19 16 0.60 163 0 0 -15 50 33 21 26 43.7 35 313 37 -15 57 43 -15 43 24 -16 3 7 -15 38 1 0.60 164 0 0 -16 9 42 21 26 50.8 34 312 38 -16 16 52 -16 2 32 -16 22 17 -15 57 8 0.60 165 0 0 -16 29 12 21 26 57.7 33 312 39 -16 36 23 -16 22 1 -16 41 48 -16 16 37 0.60 166 0 0 -16 49 2 21 27 4.4 32 311 40 -16 56 14 -16 41 51 -17 1 40 -16 36 26 0.60 167 0 0 -17 9 14 21 27 10.9 31 311 41 -17 16 26 -17 2 1 -17 21 53 -16 56 36 0.60 168 0 0 -17 29 44 21 27 17.3 30 310 42 -17 36 58 -17 22 31 -17 42 25 -17 17 5 0.60 169 0 0 -17 50 35 21 27 23.4 29 309 43 -17 57 49 -17 43 21 -18 3 17 -17 37 54 0.60 170 0 0 -18 11 43 21 27 29.4 28 309 44 -18 18 59 -18 4 29 -18 24 27 -17 59 2 0.60 171 0 0 -18 33 11 21 27 35.2 27 308 45 -18 40 27 -18 25 55 -18 45 56 -18 20 28 0.60 172 0 0 -18 54 55 21 27 40.8 26 308 46 -19 2 12 -18 47 39 -19 7 42 -18 42 11 0.60 173 0 0 -19 16 57 21 27 46.1 25 308 46 -19 24 15 -19 9 40 -19 29 45 -19 4 11 0.60 174 0 0 -19 39 16 21 27 51.3 24 307 47 -19 46 34 -19 31 58 -19 52 5 -19 26 28 0.60 175 0 0 -20 1 50 21 27 56.3 23 307 48 -20 9 9 -19 54 31 -20 14 40 -19 49 1 0.60 176 0 0 -20 24 39 21 28 1.1 22 306 49 -20 31 59 -20 17 20 -20 37 31 -20 11 49 0.60 177 0 0 -20 47 43 21 28 5.7 21 306 50 -20 55 4 -20 40 23 -21 0 36 -20 34 52 0.60 178 0 0 -21 11 1 21 28 10.0 20 305 51 -21 18 22 -21 3 40 -21 23 55 -20 58 8 0.60 179 0 0 -21 34 32 21 28 14.2 19 305 51 -21 41 54 -21 27 10 -21 47 27 -21 21 38 0.60 180 0 0 -21 58 15 21 28 18.2 18 304 52 -22 5 38 -21 50 53 -22 11 12 -21 45 20 0.60 -179 0 0 -22 22 11 21 28 21.9 17 304 53 -22 29 34 -22 14 48 -22 35 9 -22 9 15 0.60 -178 0 0 -22 46 17 21 28 25.4 16 303 53 -22 53 42 -22 38 54 -22 59 17 -22 33 20 0.60 -177 0 0 -23 10 35 21 28 28.7 15 303 54 -23 17 59 -23 3 11 -23 23 35 -22 57 36 0.60 -176 0 0 -23 35 2 21 28 31.8 14 303 55 -23 42 27 -23 27 37 -23 48 3 -23 22 2 0.60 -175 0 0 -23 59 39 21 28 34.7 13 302 55 -24 7 5 -23 52 13 -24 12 41 -23 46 38 0.60 -174 0 0 -24 24 23 21 28 37.4 12 302 56 -24 31 50 -24 16 57 -24 37 27 -24 11 21 0.60 -173 0 0 -24 49 16 21 28 39.9 11 301 57 -24 56 43 -24 41 49 -25 2 20 -24 36 13 0.60 -172 0 0 -25 14 15 21 28 42.1 10 301 57 -25 21 43 -25 6 48 -25 27 21 -25 1 11 0.60 -171 0 0 -25 39 21 21 28 44.1 9 300 58 -25 46 49 -25 31 53 -25 52 27 -25 26 16 0.60 -170 0 0 -26 4 32 21 28 46.0 8 300 58 -26 12 1 -25 57 4 -26 17 40 -25 51 27 0.61 -169 0 0 -26 29 48 21 28 47.6 7 299 59 -26 37 18 -26 22 20 -26 42 57 -26 16 42 0.61 -168 0 0 -26 55 9 21 28 49.0 6 299 59 -27 2 38 -26 47 39 -27 8 18 -26 42 1 0.61 -167 0 0 -27 20 32 21 28 50.2 5 298 59 -27 28 3 -27 13 3 -27 33 42 -27 7 24 0.61 -166 0 0 -27 45 59 21 28 51.2 4 298 60 -27 53 29 -27 38 29 -27 59 10 -27 32 50 0.62 -165 0 0 -28 11 27 21 28 51.9 3 298 60 -28 18 58 -28 3 57 -28 24 39 -27 58 18 0.62 -164 0 0 -28 36 57 21 28 52.5 2 297 60 -28 44 28 -28 29 26 -28 50 9 -28 23 47 0.64 -163 0 0 -29 2 27 21 28 52.9 1 297 60 -29 9 59 -28 54 56 -29 15 40 -28 49 17 0.67 -162 0 0 -29 27 57 21 28 53.1 0 296 61 -29 35 30 -29 20 26 -29 41 11 -29 14 46 0.84 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 562-030525 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 31 14.9391 DE: +22 21 31.204 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 31 14.9392 DE: +22 21 31.204 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2688) Halley asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.36970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 date of fit: 2023 Feb 11 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): 0.014", 0.003", 91.542° remarks: * orbital elements for (2688)Halley : Mean anomaly = 147.6521089286 deg Arg. of pericenter = 190.6158002378 deg Long. of node = 94.9778311409 deg Inclination = 3.4613441620 deg Eccentricity = 0.1483165767 Semimajor axis = 3.1759324745 AU Perihelion dist = 2.7048890422 AU Mag: H = 11.90, G = 0.15 Epoch of elements : MJD 60587.88925708 TDT (2024 Oct 04.8893) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Feb11,1.98,2024,10,4,21.342225,-0.007322,-0.519890,6.130532,-0.086377,-0.005891,0.000343,0.000000,0.000000 123.9994,22.3422,-143.02,-4.80,False UCAC4 562-030525,6.52081640,22.3586679,11.61,11.05,10.75,0.0,0,,6.54570112,22.3422288,7.14,6.99,0,0,0 2688,Halley,18.19,21.519,3.3697,0,0,1.153,-0.23,,1.8,0 0,147.4973,2024,10,4,190.6158,94.9778,3.4613,0.14832,3.17593,2.70489,11.90,5.0,0.15 1.377,0.0143,0.0033,92,0.0033,Known errors,0.88,0,-1,-1 20241004_030525,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org