IOTA/IOTA-ES occultation update for (4772) Frankdrake / TYC 237-00550-1 event on 2024 Nov 13, 20:27 UT Visible from Summary ------- On 2024 Nov 13 UT, the 29.6691030728277 km diameter asteroid (4772) Frankdrake will occult a 8.9 mag star in the constellation Sextans for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.11 mag to 18.04 mag (the magnitude of the asteroid) for at most 1.490 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 Nov 13, 20:22 - 2024 Nov 13, 20:32 * geocentric midpoint of event [JD]: 2460628.35246838 * magnitude of target star: 8.93 * magnitude drop [mag]: 9.11 * estimated maximum duration [s]: 1.490 * Moon: 94 % sunlit, 127° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 106°) * approx speed of asteroid's shadow [km/s]: 20.1627 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 237-00550-1 by 4772 Frankdrake on 2024 Nov 13 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 61 0 0 10 32 35 20 22 39.1 1 90 -77 10 23 47 10 41 22 10 16 55 10 48 13 .... 62 0 0 10 32 16 20 22 39.3 2 90 -76 10 23 29 10 41 3 10 16 36 10 47 55 0.30 63 0 0 10 31 22 20 22 39.5 3 90 -76 10 22 35 10 40 9 10 15 42 10 47 1 0.33 64 0 0 10 29 53 20 22 39.9 4 90 -75 10 21 5 10 38 40 10 14 12 10 45 32 0.35 65 0 0 10 27 47 20 22 40.3 5 90 -74 10 18 59 10 36 35 10 12 6 10 43 27 0.36 66 0 0 10 25 6 20 22 40.9 6 91 -73 10 16 18 10 33 54 10 9 25 10 40 46 0.37 67 0 0 10 21 50 20 22 41.5 7 91 -72 10 13 1 10 30 38 10 6 7 10 37 30 0.37 68 0 0 10 17 57 20 22 42.3 8 91 -71 10 9 8 10 26 46 10 2 14 10 33 38 0.38 69 0 0 10 13 29 20 22 43.1 9 91 -70 10 4 39 10 22 18 9 57 45 10 29 11 0.38 70 0 0 10 8 25 20 22 44.1 10 91 -69 9 59 35 10 17 14 9 52 40 10 24 7 0.38 71 0 0 10 2 44 20 22 45.2 11 91 -68 9 53 54 10 11 34 9 46 59 10 18 28 0.38 72 0 0 9 56 28 20 22 46.3 12 92 -67 9 47 37 10 5 18 9 40 41 10 12 13 0.38 73 0 0 9 49 35 20 22 47.6 13 92 -67 9 40 44 9 58 26 9 33 47 10 5 21 0.39 74 0 0 9 42 6 20 22 48.9 14 92 -66 9 33 14 9 50 58 9 26 17 9 57 54 0.39 75 0 0 9 34 1 20 22 50.4 15 92 -65 9 25 8 9 42 54 9 18 11 9 49 50 0.39 76 0 0 9 25 20 20 22 52.0 16 92 -64 9 16 26 9 34 13 9 9 28 9 41 10 0.39 77 0 0 9 16 2 20 22 53.7 17 92 -63 9 7 7 9 24 56 9 0 8 9 31 54 0.39 78 0 0 9 6 7 20 22 55.4 18 92 -62 8 57 12 9 15 3 8 50 12 9 22 1 0.39 79 0 0 8 55 36 20 22 57.3 19 92 -61 8 46 40 9 4 33 8 39 39 9 11 31 0.39 80 0 0 8 44 28 20 22 59.3 20 93 -60 8 35 31 8 53 26 8 28 30 9 0 25 0.39 81 0 0 8 32 44 20 23 1.4 21 93 -59 8 23 45 8 41 42 8 16 43 8 48 43 0.39 82 0 0 8 20 22 20 23 3.6 22 93 -58 8 11 22 8 29 22 8 4 20 8 36 23 0.39 83 0 0 8 7 24 20 23 5.9 23 93 -57 7 58 23 8 16 24 7 51 19 8 23 27 0.39 84 0 0 7 53 48 20 23 8.3 24 93 -56 7 44 46 8 2 50 7 37 41 8 9 54 0.40 85 0 0 7 39 36 20 23 10.8 25 93 -55 7 30 32 7 48 39 7 23 27 7 55 43 0.40 86 0 0 7 24 46 20 23 13.5 26 93 -54 7 15 41 7 33 51 7 8 35 7 40 56 0.40 87 0 0 7 9 19 20 23 16.2 27 93 -53 7 0 13 7 18 25 6 53 5 7 25 32 0.40 88 0 0 6 53 15 20 23 19.0 28 93 -52 6 44 7 7 2 23 6 36 59 7 9 30 0.40 89 0 0 6 36 34 20 23 22.0 29 93 -51 6 27 25 6 45 43 6 20 15 6 52 52 0.40 90 0 0 6 19 15 20 23 25.0 30 93 -49 6 10 5 6 28 26 6 2 53 6 35 36 0.40 91 0 0 6 1 19 20 23 28.2 31 93 -48 5 52 7 6 10 31 5 44 55 6 17 42 0.40 92 0 0 5 42 46 20 23 31.4 32 93 -47 5 33 32 5 52 0 5 26 18 5 59 12 0.40 93 0 0 5 23 35 20 23 34.8 33 93 -46 5 14 20 5 32 51 5 7 5 5 40 4 0.40 94 0 0 5 3 47 20 23 38.3 34 93 -45 4 54 30 5 13 4 4 47 14 5 20 19 0.40 95 0 0 4 43 22 20 23 41.9 35 93 -44 4 34 3 4 52 41 4 26 45 4 59 57 0.40 96 0 0 4 22 20 20 23 45.6 36 93 -43 4 12 59 4 31 40 4 5 39 4 38 58 0.40 97 0 0 4 0 40 20 23 49.4 37 92 -42 3 51 17 4 10 2 3 43 57 4 17 21 0.40 98 0 0 3 38 23 20 23 53.3 38 92 -41 3 28 58 3 47 47 3 21 36 3 55 8 0.40 99 0 0 3 15 29 20 23 57.3 39 92 -40 3 6 3 3 24 55 2 58 39 3 32 17 0.40 100 0 0 2 51 59 20 24 1.4 40 92 -39 2 42 30 3 1 27 2 35 5 3 8 50 0.40 101 0 0 2 27 51 20 24 5.7 41 91 -38 2 18 21 2 37 21 2 10 54 2 44 46 0.40 102 0 0 2 3 7 20 24 10.0 42 91 -37 1 53 34 2 12 39 1 46 6 2 20 6 0.40 103 0 0 1 37 47 20 24 14.4 43 91 -36 1 28 12 1 47 21 1 20 42 1 54 49 0.40 104 0 0 1 11 50 20 24 19.0 44 90 -34 1 2 13 1 21 26 0 54 42 1 28 56 0.40 105 0 0 0 45 18 20 24 23.6 45 90 -33 0 35 39 0 54 56 0 28 6 1 2 27 0.40 106 0 0 0 18 9 20 24 28.4 46 90 -32 0 8 28 0 27 50 0 0 54 0 35 23 0.40 107 0 0 - 0 9 34 20 24 33.2 47 89 -31 - 0 19 17 0 0 8 - 0 26 54 0 7 43 0.40 108 0 0 - 0 37 53 20 24 38.1 48 88 -30 - 0 47 38 - 0 28 8 - 0 55 16 - 0 20 31 0.40 109 0 0 - 1 6 45 20 24 43.2 49 88 -29 - 1 16 33 - 0 56 59 - 1 24 13 - 0 49 21 0.40 110 0 0 - 1 36 13 20 24 48.3 50 87 -28 - 1 46 2 - 1 26 24 - 1 53 44 - 1 18 44 0.40 111 0 0 - 2 6 14 20 24 53.6 51 87 -27 - 2 16 5 - 1 56 23 - 2 23 49 - 1 48 41 0.40 112 0 0 - 2 36 48 20 24 58.9 52 86 -25 - 2 46 42 - 2 26 54 - 2 54 27 - 2 19 11 0.40 113 0 0 - 3 7 54 20 25 4.3 53 85 -24 - 3 17 51 - 2 57 59 - 3 25 37 - 2 50 14 0.40 114 0 0 - 3 39 33 20 25 9.8 54 84 -23 - 3 49 32 - 3 29 36 - 3 57 20 - 3 21 49 0.40 115 0 0 - 4 11 44 20 25 15.4 55 83 -22 - 4 21 44 - 4 1 44 - 4 29 34 - 3 53 55 0.40 116 0 0 - 4 44 25 20 25 21.0 56 82 -21 - 4 54 27 - 4 34 23 - 5 2 19 - 4 26 32 0.40 117 0 0 - 5 17 36 20 25 26.8 57 81 -20 - 5 27 41 - 5 7 32 - 5 35 35 - 4 59 40 0.40 118 0 0 - 5 51 16 20 25 32.6 58 80 -19 - 6 1 24 - 5 41 10 - 6 9 19 - 5 33 16 0.40 119 0 0 - 6 25 25 20 25 38.5 59 78 -17 - 6 35 35 - 6 15 17 - 6 43 32 - 6 7 22 0.40 120 0 0 - 7 0 2 20 25 44.5 60 77 -16 - 7 10 14 - 6 49 52 - 7 18 12 - 6 41 55 0.40 121 0 0 - 7 35 6 20 25 50.5 61 75 -15 - 7 45 19 - 7 24 53 - 7 53 20 - 7 16 54 0.40 122 0 0 - 8 10 35 20 25 56.6 61 74 -14 - 8 20 51 - 8 0 20 - 8 28 53 - 7 52 20 0.40 123 0 0 - 8 46 29 20 26 2.8 62 72 -13 - 8 56 47 - 8 36 12 - 9 4 51 - 8 28 10 0.40 124 0 0 - 9 22 47 20 26 9.0 63 70 -12 - 9 33 7 - 9 12 28 - 9 41 12 - 9 4 25 0.40 125 0 0 - 9 59 28 20 26 15.2 64 68 -10 -10 9 49 - 9 49 7 -10 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21 10 20 27 39.2 68 31 5 -18 31 51 -18 10 29 -18 40 14 -18 2 8 0.40 139 0 0 -19 0 51 20 27 45.7 68 28 6 -19 11 34 -18 50 10 -19 19 57 -18 41 48 0.40 140 0 0 -19 40 35 20 27 52.2 68 24 7 -19 51 19 -19 29 53 -19 59 43 -19 21 31 0.40 141 0 0 -20 20 20 20 27 58.6 68 21 8 -20 31 4 -20 9 36 -20 39 29 -20 1 14 0.40 142 0 0 -21 0 3 20 28 5.0 68 18 9 -21 10 48 -20 49 19 -21 19 13 -20 40 56 0.40 143 0 0 -21 39 44 20 28 11.4 67 15 10 -21 50 30 -21 28 59 -21 58 55 -21 20 36 0.39 144 0 0 -22 19 21 20 28 17.7 67 12 11 -22 30 7 -22 8 36 -22 38 33 -22 0 12 0.39 145 0 0 -22 58 52 20 28 23.9 66 9 12 -23 9 38 -22 48 6 -23 18 5 -22 39 42 0.39 146 0 0 -23 38 16 20 28 30.2 66 6 13 -23 49 3 -23 27 30 -23 57 29 -23 19 6 0.39 147 0 0 -24 17 31 20 28 36.3 65 4 14 -24 28 18 -24 6 45 -24 36 45 -23 58 21 0.39 148 0 0 -24 56 37 20 28 42.4 65 1 15 -25 7 24 -24 45 51 -25 15 50 -24 37 26 0.39 149 0 0 -25 35 31 20 28 48.5 64 359 17 -25 46 18 -25 24 45 -25 54 44 -25 16 20 0.39 150 0 0 -26 14 12 20 28 54.5 63 357 18 -26 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23 43 -33 53 15 -33 15 26 0.39 163 0 0 -34 8 27 20 30 4.7 53 335 30 -34 19 3 -33 57 53 -34 27 21 -33 49 37 0.39 164 0 0 -34 42 8 20 30 9.4 52 334 31 -34 52 42 -34 31 35 -35 0 59 -34 23 20 0.39 165 0 0 -35 15 21 20 30 14.1 51 333 32 -35 25 53 -35 4 49 -35 34 9 -34 56 36 0.39 166 0 0 -35 48 5 20 30 18.6 50 331 33 -35 58 36 -35 37 35 -36 6 50 -35 29 22 0.39 167 0 0 -36 20 20 20 30 23.1 49 330 33 -36 30 49 -36 9 51 -36 39 2 -36 1 40 0.39 168 0 0 -36 52 5 20 30 27.4 48 329 34 -37 2 32 -36 41 38 -37 10 44 -36 33 28 0.39 169 0 0 -37 23 19 20 30 31.7 48 328 35 -37 33 45 -37 12 54 -37 41 55 -37 4 46 0.39 170 0 0 -37 54 4 20 30 35.8 47 327 36 -38 4 28 -37 43 41 -38 12 36 -37 35 34 0.39 171 0 0 -38 24 17 20 30 39.9 46 326 36 -38 34 39 -38 13 56 -38 42 47 -38 5 51 0.39 172 0 0 -38 54 0 20 30 43.8 45 325 37 -39 4 20 -38 43 40 -39 12 25 -38 35 37 0.39 173 0 0 -39 23 11 20 30 47.7 44 324 38 -39 33 29 -39 12 53 -39 41 33 -39 4 51 0.39 174 0 0 -39 51 50 20 30 51.5 43 323 39 -40 2 6 -39 41 35 -40 10 9 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0.39 -173 0 0 -45 15 57 20 31 32.0 33 311 46 -45 25 45 -45 6 9 -45 33 26 -44 58 30 0.39 -172 0 0 -45 37 12 20 31 34.5 32 311 47 -45 46 58 -45 27 26 -45 54 37 -45 19 49 0.39 -171 0 0 -45 57 55 20 31 36.9 31 310 47 -46 7 39 -45 48 12 -46 15 17 -45 40 36 0.39 -170 0 0 -46 18 8 20 31 39.3 30 309 48 -46 27 50 -46 8 27 -46 35 26 -46 0 53 0.39 -169 0 0 -46 37 51 20 31 41.6 30 308 48 -46 47 31 -46 28 12 -46 55 5 -46 20 39 0.39 -168 0 0 -46 57 3 20 31 43.8 29 307 49 -47 6 41 -46 47 26 -47 14 14 -46 39 56 0.39 -167 0 0 -47 15 46 20 31 45.9 28 306 49 -47 25 22 -47 6 11 -47 32 52 -46 58 42 0.39 -166 0 0 -47 33 59 20 31 48.0 27 306 50 -47 43 33 -47 24 26 -47 51 2 -47 16 58 0.39 -165 0 0 -47 51 43 20 31 50.0 27 305 50 -48 1 14 -47 42 12 -48 8 42 -47 34 46 0.39 -164 0 0 -48 8 57 20 31 51.9 26 304 50 -48 18 27 -47 59 28 -48 25 53 -47 52 3 0.39 -163 0 0 -48 25 43 20 31 53.8 25 303 51 -48 35 10 -48 16 16 -48 42 35 -48 8 53 0.39 -162 0 0 -48 42 0 20 31 55.6 25 302 51 -48 51 25 -48 32 34 -48 58 48 -48 25 13 0.39 -161 0 0 -48 57 48 20 31 57.3 24 301 51 -49 7 12 -48 48 25 -49 14 34 -48 41 5 0.39 -160 0 0 -49 13 9 20 31 59.0 23 301 52 -49 22 31 -49 3 48 -49 29 51 -48 56 29 0.39 -159 0 0 -49 28 2 20 32 0.6 22 300 52 -49 37 22 -49 18 43 -49 44 41 -49 11 25 0.39 -158 0 0 -49 42 28 20 32 2.2 22 299 52 -49 51 46 -49 33 10 -49 59 3 -49 25 54 0.39 -157 0 0 -49 56 26 20 32 3.7 21 298 52 -50 5 43 -49 47 10 -50 12 59 -49 39 56 0.39 -156 0 0 -50 9 58 20 32 5.1 20 297 53 -50 19 13 -50 0 44 -50 26 27 -49 53 30 0.39 -155 0 0 -50 23 3 20 32 6.5 20 297 53 -50 32 16 -50 13 50 -50 39 29 -50 6 38 0.39 -154 0 0 -50 35 41 20 32 7.9 19 296 53 -50 44 53 -50 26 30 -50 52 5 -50 19 20 0.39 -153 0 0 -50 47 54 20 32 9.1 18 295 53 -50 57 4 -50 38 45 -51 4 15 -50 31 35 0.39 -152 0 0 -50 59 41 20 32 10.4 18 294 54 -51 8 49 -50 50 33 -51 15 59 -50 43 25 0.39 -151 0 0 -51 11 2 20 32 11.5 17 293 54 -51 20 9 -51 1 56 -51 27 17 -50 54 49 0.39 -150 0 0 -51 21 58 20 32 12.7 16 293 54 -51 31 4 -51 12 53 -51 38 11 -51 5 47 0.39 -149 0 0 -51 32 29 20 32 13.7 16 292 54 -51 41 33 -51 23 25 -51 48 39 -51 16 21 0.39 -148 0 0 -51 42 35 20 32 14.8 15 291 54 -51 51 38 -51 33 33 -51 58 43 -51 26 29 0.40 -147 0 0 -51 52 17 20 32 15.7 15 290 54 -52 1 18 -51 43 16 -52 8 22 -51 36 13 0.40 -146 0 0 -52 1 34 20 32 16.7 14 289 54 -52 10 34 -51 52 34 -52 17 37 -51 45 33 0.40 -145 0 0 -52 10 27 20 32 17.6 13 289 55 -52 19 26 -52 1 29 -52 26 28 -51 54 28 0.40 -144 0 0 -52 18 57 20 32 18.4 13 288 55 -52 27 54 -52 9 59 -52 34 55 -52 3 0 0.40 -143 0 0 -52 27 2 20 32 19.2 12 287 55 -52 35 59 -52 18 6 -52 42 59 -52 11 7 0.40 -142 0 0 -52 34 44 20 32 20.0 11 286 55 -52 43 40 -52 25 49 -52 50 39 -52 18 51 0.40 -141 0 0 -52 42 3 20 32 20.7 11 285 55 -52 50 58 -52 33 9 -52 57 56 -52 26 12 0.40 -140 0 0 -52 48 59 20 32 21.3 10 285 55 -52 57 52 -52 40 6 -53 4 50 -52 33 9 0.40 -139 0 0 -52 55 32 20 32 22.0 10 284 55 -53 4 24 -52 46 39 -53 11 21 -52 39 44 0.40 -138 0 0 -53 1 42 20 32 22.5 9 283 55 -53 10 34 -52 52 50 -53 17 30 -52 45 55 0.40 -137 0 0 -53 7 29 20 32 23.1 8 282 55 -53 16 20 -52 58 39 -53 23 16 -52 51 44 0.40 -136 0 0 -53 12 54 20 32 23.6 8 281 55 -53 21 44 -53 4 4 -53 28 39 -52 57 11 0.40 -135 0 0 -53 17 57 20 32 24.1 7 280 55 -53 26 46 -53 9 8 -53 33 41 -53 2 14 0.40 -134 0 0 -53 22 37 20 32 24.5 7 280 55 -53 31 26 -53 13 49 -53 38 20 -53 6 56 0.41 -133 0 0 -53 26 56 20 32 24.9 6 279 55 -53 35 44 -53 18 8 -53 42 38 -53 11 16 0.41 -132 0 0 -53 30 52 20 32 25.2 5 278 55 -53 39 40 -53 22 5 -53 46 33 -53 15 13 0.41 -131 0 0 -53 34 27 20 32 25.5 5 277 55 -53 43 14 -53 25 40 -53 50 7 -53 18 49 0.41 -130 0 0 -53 37 40 20 32 25.8 4 276 55 -53 46 27 -53 28 54 -53 53 19 -53 22 3 0.42 -129 0 0 -53 40 32 20 32 26.0 4 276 55 -53 49 18 -53 31 46 -53 56 10 -53 24 55 0.42 -128 0 0 -53 43 1 20 32 26.2 3 275 54 -53 51 47 -53 34 16 -53 58 39 -53 27 25 0.43 -127 0 0 -53 45 10 20 32 26.4 2 274 54 -53 53 56 -53 36 25 -54 0 47 -53 29 34 0.44 -126 0 0 -53 46 57 20 32 26.5 2 273 54 -53 55 42 -53 38 12 -54 2 34 -53 31 22 0.45 -125 0 0 -53 48 22 20 32 26.6 1 272 54 -53 57 8 -53 39 37 -54 3 59 -53 32 47 0.49 -124 0 0 -53 49 27 20 32 26.7 1 272 54 -53 58 12 -53 40 42 -54 5 3 -53 33 52 0.59 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 237-00550-1 * constellation : Sextans * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 55 36.1123 DE: +00 39 21.326 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 55 36.1124 DE: +00 39 21.326 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.9 * B mag [mag]: 9.7 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4772) Frankdrake asteroid class: approx. diameter [km]: 30 approx. diameter ["]: 0.013 distance from Earth [AU]: 3.19120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.017", 0.002", 106.092° remarks: * orbital elements for (4772)Frankdrake : Mean anomaly = 93.6897961131 deg Arg. of pericenter = 181.1461659697 deg Long. of node = 209.7760915449 deg Inclination = 11.5290748943 deg Eccentricity = 0.0683770023 Semimajor axis = 3.1610982083 AU Perihelion dist = 2.9449517890 AU Mag: H = 12.07, G = 0.15 Epoch of elements : MJD 60627.85246825 TDT (2024 Nov 13.8525) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr27,1.49,2024,11,13,20.459241,-0.194867,-0.311667,9.646967,-6.037275,-0.005560,0.001872,0.000000,0.000000 148.8877,0.5401,-130.79,-18.26,False TYC 237-00550-1,9.92669785,0.6559240,9.71,8.93,8.51,0.2,0,,9.94791622,0.5400626,9.11,9.08,0,0,0 4772,Frankdrake,18.04,30.132,3.1912,0,0,1.773,-16.64,,1.6,0 0,93.5403,2024,11,13,181.1462,209.7761,11.5291,0.06838,3.16110,2.94495,12.07,5.0,0.15 1.391,0.0170,0.0021,106,0.0051,Known errors,1.11,0,-1,-1 20241113_0550-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org