IOTA/IOTA-ES occultation update for (823) Sisigambis / TYC 1393-00171-1 event on 2024 Oct 16, 20:02 UT Visible from Summary ------- On 2024 Oct 16 UT, the 15.971 km diameter asteroid (823) Sisigambis will occult a 10.1 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 5.48 mag to 15.54 mag (the magnitude of the asteroid) for at most 0.590 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: 96 * date and approx. time of event: 2024 Oct 16, 19:59 - 2024 Oct 16, 20:05 * geocentric midpoint of event [JD]: 2460600.33515813 * magnitude of target star: 10.07 * magnitude drop [mag]: 5.48 * estimated maximum duration [s]: 0.590 * Moon: 99 % sunlit, 114° distance * Sun: 74° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.004", 117°) * approx speed of asteroid's shadow [km/s]: 27.0886 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1393-00171-1 by 823 Sisigambis on 2024 Oct 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 82 0 0 -17 38 35 19 59 31.3 1 73 -53 -17 44 17 -17 32 53 -17 48 52 -17 28 19 .... 83 0 0 -17 21 23 19 59 31.4 2 72 -53 -17 27 4 -17 15 42 -17 31 38 -17 11 8 0.45 84 0 0 -17 4 39 19 59 31.6 3 72 -52 -17 10 20 -16 58 59 -17 14 54 -16 54 27 0.57 85 0 0 -16 48 26 19 59 31.9 4 72 -52 -16 54 5 -16 42 46 -16 58 39 -16 38 14 0.63 86 0 0 -16 32 41 19 59 32.3 5 71 -51 -16 38 20 -16 27 2 -16 42 53 -16 22 31 0.66 87 0 0 -16 17 26 19 59 32.7 6 71 -50 -16 23 5 -16 11 48 -16 27 37 -16 7 17 0.68 88 0 0 -16 2 41 19 59 33.3 7 71 -50 -16 8 19 -15 57 4 -16 12 51 -15 52 34 0.69 89 0 0 -15 48 27 19 59 33.9 8 71 -49 -15 54 4 -15 42 51 -15 58 35 -15 38 21 0.70 90 0 0 -15 34 43 19 59 34.6 9 70 -49 -15 40 19 -15 29 7 -15 44 50 -15 24 38 0.71 91 0 0 -15 21 30 19 59 35.4 10 70 -48 -15 27 6 -15 15 55 -15 31 36 -15 11 26 0.72 92 0 0 -15 8 48 19 59 36.3 11 70 -47 -15 14 23 -15 3 13 -15 18 52 -14 58 44 0.72 93 0 0 -14 56 36 19 59 37.3 12 69 -46 -15 2 11 -14 51 2 -15 6 40 -14 46 34 0.72 94 0 0 -14 44 57 19 59 38.4 13 69 -46 -14 50 30 -14 39 23 -14 54 59 -14 34 55 0.73 95 0 0 -14 33 48 19 59 39.5 13 69 -45 -14 39 22 -14 28 15 -14 43 50 -14 23 48 0.73 96 0 0 -14 23 12 19 59 40.8 14 69 -44 -14 28 44 -14 17 39 -14 33 12 -14 13 12 0.73 97 0 0 -14 13 7 19 59 42.1 15 68 -43 -14 18 39 -14 7 35 -14 23 6 -14 3 8 0.74 98 0 0 -14 3 34 19 59 43.5 16 68 -43 -14 9 6 -13 58 2 -14 13 33 -13 53 36 0.74 99 0 0 -13 54 33 19 59 45.0 17 68 -42 -14 0 5 -13 49 2 -14 4 32 -13 44 37 0.74 100 0 0 -13 46 5 19 59 46.5 18 67 -41 -13 51 36 -13 40 34 -13 56 2 -13 36 9 0.74 101 0 0 -13 38 9 19 59 48.2 19 67 -40 -13 43 40 -13 32 39 -13 48 6 -13 28 14 0.75 102 0 0 -13 30 46 19 59 49.9 20 67 -39 -13 36 16 -13 25 16 -13 40 42 -13 20 51 0.75 103 0 0 -13 23 55 19 59 51.7 21 66 -38 -13 29 25 -13 18 25 -13 33 51 -13 14 1 0.75 104 0 0 -13 17 37 19 59 53.6 22 66 -38 -13 23 7 -13 12 8 -13 27 32 -13 7 44 0.75 105 0 0 -13 11 52 19 59 55.6 23 66 -37 -13 17 22 -13 6 23 -13 21 47 -13 1 59 0.75 106 0 0 -13 6 40 19 59 57.6 24 65 -36 -13 12 9 -13 1 11 -13 16 34 -12 56 47 0.75 107 0 0 -13 2 1 19 59 59.7 25 65 -35 -13 7 30 -12 56 32 -13 11 55 -12 52 9 0.75 108 0 0 -12 57 55 20 0 1.9 26 65 -34 -13 3 24 -12 52 26 -13 7 48 -12 48 3 0.75 109 0 0 -12 54 22 20 0 4.2 27 64 -33 -12 59 51 -12 48 54 -13 4 15 -12 44 30 0.75 110 0 0 -12 51 23 20 0 6.5 28 64 -32 -12 56 51 -12 45 54 -13 1 15 -12 41 31 0.76 111 0 0 -12 48 56 20 0 8.9 29 63 -31 -12 54 25 -12 43 28 -12 58 49 -12 39 5 0.76 112 0 0 -12 47 4 20 0 11.4 29 63 -30 -12 52 32 -12 41 36 -12 56 56 -12 37 12 0.76 113 0 0 -12 45 44 20 0 13.9 30 62 -30 -12 51 13 -12 40 16 -12 55 37 -12 35 53 0.76 114 0 0 -12 44 58 20 0 16.5 31 62 -29 -12 50 27 -12 39 30 -12 54 51 -12 35 7 0.76 115 0 0 -12 44 46 20 0 19.2 32 61 -28 -12 50 14 -12 39 18 -12 54 38 -12 34 55 0.76 116 0 0 -12 45 7 20 0 21.9 33 61 -27 -12 50 35 -12 39 39 -12 54 59 -12 35 16 0.76 117 0 0 -12 46 1 20 0 24.8 34 60 -26 -12 51 30 -12 40 33 -12 55 54 -12 36 10 0.76 118 0 0 -12 47 30 20 0 27.6 35 60 -25 -12 52 58 -12 42 1 -12 57 22 -12 37 38 0.76 119 0 0 -12 49 31 20 0 30.6 35 59 -24 -12 55 0 -12 44 3 -12 59 24 -12 39 40 0.76 120 0 0 -12 52 6 20 0 33.6 36 58 -23 -12 57 35 -12 46 38 -13 2 0 -12 42 14 0.76 121 0 0 -12 55 15 20 0 36.6 37 58 -22 -13 0 44 -12 49 47 -13 5 9 -12 45 23 0.76 122 0 0 -12 58 58 20 0 39.7 38 57 -21 -13 4 27 -12 53 29 -13 8 52 -12 49 5 0.76 123 0 0 -13 3 14 20 0 42.9 39 56 -20 -13 8 43 -12 57 45 -13 13 8 -12 53 21 0.76 124 0 0 -13 8 3 20 0 46.2 39 56 -19 -13 13 33 -13 2 34 -13 17 58 -12 58 10 0.76 125 0 0 -13 13 26 20 0 49.4 40 55 -18 -13 18 56 -13 7 57 -13 23 22 -13 3 32 0.76 126 0 0 -13 19 23 20 0 52.8 41 54 -17 -13 24 53 -13 13 53 -13 29 19 -13 9 28 0.76 127 0 0 -13 25 53 20 0 56.2 42 53 -16 -13 31 24 -13 20 23 -13 35 50 -13 15 58 0.77 128 0 0 -13 32 56 20 0 59.6 42 52 -15 -13 38 27 -13 27 26 -13 42 54 -13 23 0 0.77 129 0 0 -13 40 33 20 1 3.1 43 52 -14 -13 46 5 -13 35 2 -13 50 31 -13 30 36 0.77 130 0 0 -13 48 43 20 1 6.7 44 51 -13 -13 54 15 -13 43 11 -13 58 42 -13 38 45 0.77 131 0 0 -13 57 26 20 1 10.3 44 50 -12 -14 2 59 -13 51 54 -14 7 26 -13 47 28 0.77 132 0 0 -14 6 42 20 1 13.9 45 49 -11 -14 12 15 -14 1 10 -14 16 43 -13 56 43 0.77 133 0 0 -14 16 32 20 1 17.6 46 48 -10 -14 22 5 -14 10 59 -14 26 33 -14 6 31 0.77 134 0 0 -14 26 54 20 1 21.3 46 47 -9 -14 32 28 -14 21 20 -14 36 57 -14 16 53 0.77 135 0 0 -14 37 49 20 1 25.1 47 45 -8 -14 43 24 -14 32 15 -14 47 53 -14 27 47 0.77 136 0 0 -14 49 17 20 1 28.9 47 44 -7 -14 54 52 -14 43 42 -14 59 21 -14 39 13 0.77 137 0 0 -15 1 17 20 1 32.7 48 43 -6 -15 6 53 -14 55 42 -15 11 23 -14 51 12 0.77 138 0 0 -15 13 50 20 1 36.6 48 42 -5 -15 19 26 -15 8 14 -15 23 57 -15 3 44 0.77 139 0 0 -15 26 54 20 1 40.5 49 41 -4 -15 32 32 -15 21 18 -15 37 3 -15 16 48 0.77 140 0 0 -15 40 31 20 1 44.5 49 39 -3 -15 46 9 -15 34 54 -15 50 41 -15 30 23 0.77 141 0 0 -15 54 40 20 1 48.4 50 38 -2 -16 0 19 -15 49 2 -16 4 51 -15 44 31 0.77 142 0 0 -16 9 21 20 1 52.4 50 37 -1 -16 15 0 -16 3 42 -16 19 33 -15 59 10 0.77 143 0 0 -16 24 33 20 1 56.5 51 35 0 -16 30 13 -16 18 53 -16 34 46 -16 14 20 0.77 144 0 0 -16 40 16 20 2 0.5 51 34 1 -16 45 56 -16 34 35 -16 50 31 -16 30 2 0.77 145 0 0 -16 56 30 20 2 4.6 51 32 2 -17 2 11 -16 50 49 -17 6 46 -16 46 15 0.77 146 0 0 -17 13 15 20 2 8.7 52 31 3 -17 18 57 -17 7 33 -17 23 33 -17 2 58 0.77 147 0 0 -17 30 30 20 2 12.8 52 29 4 -17 36 13 -17 24 47 -17 40 49 -17 20 12 0.77 148 0 0 -17 48 16 20 2 16.9 52 28 5 -17 54 0 -17 42 32 -17 58 37 -17 37 56 0.77 149 0 0 -18 6 31 20 2 21.1 52 26 6 -18 12 16 -18 0 46 -18 16 54 -17 56 10 0.77 150 0 0 -18 25 16 20 2 25.3 52 24 7 -18 31 2 -18 19 30 -18 35 40 -18 14 53 0.77 151 0 0 -18 44 30 20 2 29.4 52 23 8 -18 50 17 -18 38 43 -18 54 56 -18 34 5 0.77 152 0 0 -19 4 12 20 2 33.6 52 21 9 -19 10 0 -18 58 25 -19 14 40 -18 53 46 0.77 153 0 0 -19 24 24 20 2 37.8 52 19 10 -19 30 12 -19 18 35 -19 34 53 -19 13 56 0.77 154 0 0 -19 45 3 20 2 42.0 52 18 11 -19 50 53 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52 10 20 3 35.5 49 357 23 -24 58 13 -24 46 7 -25 3 5 -24 41 16 0.77 168 0 0 -25 18 25 20 3 39.5 48 356 24 -25 24 29 -25 12 21 -25 29 22 -25 7 29 0.77 169 0 0 -25 44 59 20 3 43.4 48 354 25 -25 51 4 -25 38 54 -25 55 58 -25 34 2 0.77 170 0 0 -26 11 52 20 3 47.3 47 353 26 -26 17 58 -26 5 46 -26 22 53 -26 0 52 0.77 171 0 0 -26 39 2 20 3 51.2 47 351 27 -26 45 9 -26 32 55 -26 50 5 -26 28 1 0.77 172 0 0 -27 6 29 20 3 55.0 46 350 28 -27 12 37 -27 0 21 -27 17 33 -26 55 26 0.77 173 0 0 -27 34 11 20 3 58.7 46 349 29 -27 40 21 -27 28 2 -27 45 18 -27 23 7 0.77 174 0 0 -28 2 9 20 4 2.5 45 348 30 -28 8 19 -27 55 59 -28 13 17 -27 51 3 0.77 175 0 0 -28 30 21 20 4 6.1 44 346 30 -28 36 32 -28 24 10 -28 41 31 -28 19 13 0.77 176 0 0 -28 58 46 20 4 9.8 44 345 31 -29 4 58 -28 52 34 -29 9 58 -28 47 36 0.77 177 0 0 -29 27 23 20 4 13.3 43 344 32 -29 33 37 -29 21 11 -29 38 37 -29 16 12 0.77 178 0 0 -29 56 12 20 4 16.8 42 343 33 -30 2 26 -29 49 59 -30 7 27 -29 44 59 0.77 179 0 0 -30 25 12 20 4 20.3 41 342 34 -30 31 27 -30 18 57 -30 36 28 -30 13 57 0.77 180 0 0 -30 54 21 20 4 23.7 41 341 34 -31 0 37 -30 48 5 -31 5 39 -30 43 4 0.77 -179 0 0 -31 23 38 20 4 27.0 40 339 35 -31 29 55 -31 17 22 -31 34 58 -31 12 20 0.77 -178 0 0 -31 53 4 20 4 30.3 39 338 36 -31 59 22 -31 46 47 -32 4 25 -31 41 45 0.77 -177 0 0 -32 22 36 20 4 33.5 38 337 37 -32 28 54 -32 16 18 -32 33 59 -32 11 15 0.77 -176 0 0 -32 52 13 20 4 36.7 38 336 37 -32 58 32 -32 45 55 -33 3 37 -32 40 51 0.77 -175 0 0 -33 21 55 20 4 39.8 37 335 38 -33 28 15 -33 15 36 -33 33 21 -33 10 32 0.77 -174 0 0 -33 51 41 20 4 42.8 36 334 39 -33 58 2 -33 45 21 -34 3 8 -33 40 16 0.77 -173 0 0 -34 21 30 20 4 45.7 35 333 39 -34 27 51 -34 15 9 -34 32 58 -34 10 4 0.77 -172 0 0 -34 51 20 20 4 48.6 34 333 40 -34 57 42 -34 44 59 -35 2 49 -34 39 53 0.77 -171 0 0 -35 21 11 20 4 51.4 34 332 41 -35 27 33 -35 14 49 -35 32 41 -35 9 43 0.77 -170 0 0 -35 51 1 20 4 54.1 33 331 41 -35 57 24 -35 44 39 -36 2 33 -35 39 32 0.77 -169 0 0 -36 20 51 20 4 56.7 32 330 42 -36 27 14 -36 14 28 -36 32 23 -36 9 21 0.77 -168 0 0 -36 50 38 20 4 59.3 31 329 42 -36 57 2 -36 44 14 -37 2 11 -36 39 7 0.77 -167 0 0 -37 20 22 20 5 1.8 30 328 43 -37 26 46 -37 13 58 -37 31 55 -37 8 50 0.77 -166 0 0 -37 50 1 20 5 4.2 29 327 43 -37 56 26 -37 43 37 -38 1 36 -37 38 29 0.77 -165 0 0 -38 19 36 20 5 6.6 28 326 44 -38 26 1 -38 13 11 -38 31 11 -38 8 3 0.77 -164 0 0 -38 49 4 20 5 8.8 28 326 44 -38 55 30 -38 42 39 -39 0 40 -38 37 31 0.77 -163 0 0 -39 18 26 20 5 11.0 27 325 45 -39 24 51 -39 12 1 -39 30 2 -39 6 52 0.77 -162 0 0 -39 47 39 20 5 13.1 26 324 45 -39 54 5 -39 41 14 -39 59 16 -39 36 5 0.77 -161 0 0 -40 16 44 20 5 15.2 25 323 46 -40 23 10 -40 10 19 -40 28 21 -40 5 9 0.77 -160 0 0 -40 45 39 20 5 17.1 24 322 46 -40 52 6 -40 39 14 -40 57 17 -40 34 4 0.77 -159 0 0 -41 14 24 20 5 19.0 23 322 46 -41 20 51 -41 7 59 -41 26 2 -41 2 49 0.77 -158 0 0 -41 42 58 20 5 20.8 23 321 47 -41 49 24 -41 36 32 -41 54 35 -41 31 23 0.77 -157 0 0 -42 11 20 20 5 22.5 22 320 47 -42 17 46 -42 4 54 -42 22 57 -41 59 44 0.77 -156 0 0 -42 39 29 20 5 24.2 21 319 47 -42 45 55 -42 33 3 -42 51 6 -42 27 53 0.77 -155 0 0 -43 7 24 20 5 25.8 20 318 47 -43 13 50 -43 0 58 -43 19 1 -42 55 49 0.77 -154 0 0 -43 35 5 20 5 27.3 19 318 47 -43 41 31 -43 28 40 -43 46 42 -43 23 30 0.77 -153 0 0 -44 2 31 20 5 28.7 18 317 48 -44 8 57 -43 56 6 -44 14 8 -43 50 57 0.77 -152 0 0 -44 29 42 20 5 30.1 18 316 48 -44 36 8 -44 23 17 -44 41 18 -44 18 8 0.77 -151 0 0 -44 56 37 20 5 31.3 17 315 48 -45 3 2 -44 50 12 -45 8 12 -44 45 3 0.77 -150 0 0 -45 23 15 20 5 32.6 16 315 48 -45 29 40 -45 16 50 -45 34 50 -45 11 42 0.77 -149 0 0 -45 49 35 20 5 33.7 15 314 48 -45 56 0 -45 43 11 -46 1 9 -45 38 3 0.77 -148 0 0 -46 15 38 20 5 34.8 14 313 48 -46 22 2 -46 9 14 -46 27 12 -46 4 7 0.77 -147 0 0 -46 41 22 20 5 35.8 14 312 48 -46 47 46 -46 34 59 -46 52 55 -46 29 52 0.77 -146 0 0 -47 6 48 20 5 36.7 13 311 48 -47 13 12 -47 0 25 -47 18 20 -46 55 18 0.77 -145 0 0 -47 31 55 20 5 37.6 12 311 48 -47 38 18 -47 25 33 -47 43 26 -47 20 26 0.77 -144 0 0 -47 56 42 20 5 38.4 11 310 48 -48 3 4 -47 50 20 -48 8 11 -47 45 14 0.77 -143 0 0 -48 21 9 20 5 39.2 10 309 48 -48 27 30 -48 14 48 -48 32 37 -48 9 42 0.77 -142 0 0 -48 45 15 20 5 39.9 10 308 48 -48 51 36 -48 38 55 -48 56 43 -48 33 50 0.77 -141 0 0 -49 9 1 20 5 40.5 9 308 48 -49 15 21 -49 2 41 -49 20 27 -48 57 37 0.78 -140 0 0 -49 32 26 20 5 41.1 8 307 48 -49 38 46 -49 26 7 -49 43 51 -49 21 3 0.78 -139 0 0 -49 55 30 20 5 41.6 7 306 48 -50 1 49 -49 49 12 -50 6 54 -49 44 8 0.78 -138 0 0 -50 18 12 20 5 42.1 7 305 48 -50 24 31 -50 11 55 -50 29 35 -50 6 52 0.78 -137 0 0 -50 40 33 20 5 42.5 6 305 48 -50 46 51 -50 34 17 -50 51 54 -50 29 14 0.78 -136 0 0 -51 2 32 20 5 42.8 5 304 47 -51 8 49 -50 56 16 -51 13 52 -50 51 15 0.78 -135 0 0 -51 24 9 20 5 43.1 4 303 47 -51 30 25 -51 17 54 -51 35 27 -51 12 53 0.79 -134 0 0 -51 45 24 20 5 43.4 4 302 47 -51 51 39 -51 39 10 -51 56 41 -51 34 10 0.79 -133 0 0 -52 6 17 20 5 43.6 3 301 47 -52 12 31 -52 0 4 -52 17 32 -51 55 5 0.80 -132 0 0 -52 26 48 20 5 43.8 2 301 47 -52 33 1 -52 20 35 -52 38 1 -52 15 37 0.80 -131 0 0 -52 46 56 20 5 43.9 2 300 46 -52 53 8 -52 40 45 -52 58 7 -52 35 47 0.82 -130 0 0 -53 6 42 20 5 44.0 1 299 46 -53 12 53 -53 0 32 -53 17 52 -52 55 34 0.86 -129 0 0 -53 26 6 20 5 44.0 0 298 46 -53 32 16 -53 19 56 -53 37 13 -53 15 0 1.19 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 1393-00171-1 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 45 24.8937 DE: +16 23 14.307 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 45 24.8942 DE: +16 23 14.305 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.1 * B mag [mag]: 10.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (823) Sisigambis asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.05330 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.013", 0.004", 116.915° remarks: * orbital elements for (823)Sisigambis : Mean anomaly = 349.6558633634 deg Arg. of pericenter = 218.5817127312 deg Long. of node = 254.9641430763 deg Inclination = 3.6472351300 deg Eccentricity = 0.0903749280 Semimajor axis = 2.2214692618 AU Perihelion dist = 2.0207041372 AU Mag: H = 11.21, G = 0.15 Epoch of elements : MJD 60599.83515775 TDT (2024 Oct 16.8352) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,0.59,2024,10,16,20.043795,-0.200110,-0.575541,14.450702,-4.994790,-0.004935,0.001313,0.000000,0.000000 165.2158,16.2985,-124.31,-9.29,False TYC 1393-00171-1,8.75691488,16.3873076,10.35,10.07,9.92,0.0,0,,8.77999711,16.2985323,5.48,5.18,0,0,0 823,Sisigambis,15.54,15.971,2.0533,0,0,4.299,-21.40,,0.8,0 0,349.4073,2024,10,16,218.5817,254.9641,3.6472,0.09037,2.22147,2.02070,11.20,5.0,0.15 1.402,0.0127,0.0040,117,0.0043,Known errors,0.97,0,-1,-1 20241016_0171-1,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org