IOTA/IOTA-ES occultation update for (2142) Landau / G202649.5-185048 event on 2024 Sep 04, 18:32 UT Visible from Summary ------- On 2024 Sep 04 UT, the 20.4 km diameter asteroid (2142) Landau will occult a 10.6 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.89 mag to 17.51 mag (the magnitude of the asteroid) for at most 2.770 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: 92 * date and approx. time of event: 2024 Sep 04, 18:22 - 2024 Sep 04, 18:43 * geocentric midpoint of event [JD]: 2460558.27283454 * magnitude of target star: 10.62 * magnitude drop [mag]: 6.89 * estimated maximum duration [s]: 2.770 * Moon: 2 % sunlit, 124° distance * Sun: 142° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.50 * 1 sigma uncertainty interval [seconds]: +/- 5.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.005", 77°) * approx speed of asteroid's shadow [km/s]: 7.3702 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G202649.5-185048 by 2142 Landau on 2024 Sep 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 - 38 0 0 26 5 29 18 43 19.5 1 111 27 26 13 47 25 57 12 26 22 2 25 49 1 .... - 37 0 0 25 45 11 18 43 19.2 1 112 26 25 53 27 25 36 56 26 1 40 25 28 46 -0.55 - 36 0 0 25 25 22 18 43 18.5 2 112 25 25 33 36 25 17 8 25 41 47 25 9 1 -0.72 - 35 0 0 25 6 2 18 43 17.5 3 113 24 25 14 15 24 57 51 25 22 25 24 49 45 -0.79 - 34 0 0 24 47 13 18 43 16.2 4 113 24 24 55 24 24 39 3 25 3 32 24 30 59 -0.83 - 33 0 0 24 28 54 18 43 14.5 5 113 23 24 37 4 24 20 46 24 45 10 24 12 43 -0.86 - 32 0 0 24 11 6 18 43 12.6 6 114 22 24 19 14 24 2 59 24 27 18 23 54 58 -0.88 - 31 0 0 23 53 48 18 43 10.3 7 114 21 24 1 54 23 45 43 24 9 57 23 37 43 -0.89 - 30 0 0 23 37 1 18 43 7.6 8 115 20 23 45 6 23 28 57 23 53 7 23 20 59 -0.90 - 29 0 0 23 20 45 18 43 4.7 9 115 19 23 28 48 23 12 43 23 36 48 23 4 46 -0.91 - 28 0 0 23 5 0 18 43 1.4 10 115 18 23 13 2 22 56 59 23 21 0 22 49 4 -0.91 - 27 0 0 22 49 47 18 42 57.9 11 116 17 22 57 47 22 41 47 23 5 44 22 33 54 -0.92 - 26 0 0 22 35 4 18 42 54.0 12 116 16 22 43 3 22 27 6 22 50 59 22 19 14 -0.92 - 25 0 0 22 20 54 18 42 49.9 13 117 15 22 28 51 22 12 57 22 36 46 22 5 6 -0.93 - 24 0 0 22 7 15 18 42 45.4 14 117 15 22 15 11 21 59 19 22 23 4 21 51 29 -0.93 - 23 0 0 21 54 7 18 42 40.6 15 118 14 22 2 2 21 46 13 22 9 54 21 38 24 -0.93 - 22 0 0 21 41 31 18 42 35.6 15 118 13 21 49 25 21 33 38 21 57 16 21 25 51 -0.93 - 21 0 0 21 29 27 18 42 30.3 16 118 12 21 37 20 21 21 36 21 45 10 21 13 49 -0.94 - 20 0 0 21 17 55 18 42 24.7 17 119 11 21 25 47 21 10 5 21 33 36 21 2 19 -0.94 - 19 0 0 21 6 55 18 42 18.8 18 119 10 21 14 46 20 59 5 21 22 33 20 51 21 -0.94 - 18 0 0 20 56 26 18 42 12.6 19 120 9 21 4 16 20 48 38 21 12 3 20 40 54 -0.94 - 17 0 0 20 46 30 18 42 6.2 20 120 8 20 54 18 20 38 42 21 2 4 20 30 59 -0.94 - 16 0 0 20 37 5 18 41 59.5 21 121 7 20 44 53 20 29 18 20 52 37 20 21 37 -0.94 - 15 0 0 20 28 12 18 41 52.6 22 121 6 20 35 59 20 20 26 20 43 43 20 12 45 -0.94 - 14 0 0 20 19 51 18 41 45.4 22 122 5 20 27 37 20 12 6 20 35 20 20 4 26 -0.94 - 13 0 0 20 12 2 18 41 37.9 23 122 4 20 19 47 20 4 18 20 27 29 19 56 39 -0.94 - 12 0 0 20 4 45 18 41 30.2 24 123 4 20 12 29 19 57 1 20 20 11 19 49 23 -0.94 - 11 0 0 19 57 59 18 41 22.3 25 123 3 20 5 43 19 50 16 20 13 24 19 42 39 -0.94 - 10 0 0 19 51 46 18 41 14.1 26 124 2 19 59 29 19 44 3 20 7 9 19 36 26 -0.94 - 9 0 0 19 46 4 18 41 5.7 27 124 1 19 53 47 19 38 22 20 1 26 19 30 46 -0.94 - 8 0 0 19 40 54 18 40 57.1 27 125 0 19 48 36 19 33 13 19 56 15 19 25 37 -0.94 - 7 0 0 19 36 15 18 40 48.2 28 125 -1 19 43 57 19 28 35 19 51 35 19 20 59 -0.94 - 6 0 0 19 32 8 18 40 39.1 29 126 -2 19 39 50 19 24 28 19 47 28 19 16 53 -0.94 - 5 0 0 19 28 33 18 40 29.9 30 126 -3 19 36 14 19 20 53 19 43 51 19 13 19 -0.94 - 4 0 0 19 25 29 18 40 20.4 30 127 -4 19 33 10 19 17 50 19 40 47 19 10 15 -0.94 - 3 0 0 19 22 57 18 40 10.7 31 128 -5 19 30 37 19 15 18 19 38 14 19 7 44 -0.94 - 2 0 0 19 20 56 18 40 0.8 32 128 -6 19 28 36 19 13 17 19 36 12 19 5 43 -0.94 - 1 0 0 19 19 26 18 39 50.7 33 129 -6 19 27 6 19 11 48 19 34 42 19 4 14 -0.94 0 0 0 19 18 28 18 39 40.4 33 130 -7 19 26 7 19 10 49 19 33 43 19 3 16 -0.94 1 0 0 19 18 1 18 39 29.9 34 130 -8 19 25 40 19 10 22 19 33 16 19 2 49 -0.94 2 0 0 19 18 5 18 39 19.3 35 131 -9 19 25 44 19 10 27 19 33 20 19 2 54 -0.94 3 0 0 19 18 40 18 39 8.5 35 132 -10 19 26 19 19 11 2 19 33 55 19 3 29 -0.94 4 0 0 19 19 46 18 38 57.5 36 133 -11 19 27 25 19 12 8 19 35 1 19 4 35 -0.94 5 0 0 19 21 23 18 38 46.4 37 133 -12 19 29 2 19 13 45 19 36 38 19 6 12 -0.94 6 0 0 19 23 31 18 38 35.0 37 134 -13 19 31 10 19 15 53 19 38 46 19 8 20 -0.94 7 0 0 19 26 9 18 38 23.6 38 135 -13 19 33 49 19 18 31 19 41 25 19 10 58 -0.94 8 0 0 19 29 19 18 38 12.0 39 136 -14 19 36 58 19 21 40 19 44 34 19 14 7 -0.94 9 0 0 19 32 58 18 38 0.2 39 137 -15 19 40 38 19 25 20 19 48 14 19 17 46 -0.94 10 0 0 19 37 9 18 37 48.3 40 138 -16 19 44 48 19 29 30 19 52 25 19 21 56 -0.94 11 0 0 19 41 49 18 37 36.3 40 138 -17 19 49 29 19 34 10 19 57 6 19 26 36 -0.94 12 0 0 19 47 0 18 37 24.1 41 139 -18 19 54 41 19 39 21 20 2 18 19 31 46 -0.94 13 0 0 19 52 41 18 37 11.8 41 140 -19 20 0 22 19 45 2 20 8 0 19 37 27 -0.94 14 0 0 19 58 53 18 36 59.4 42 141 -19 20 6 34 19 51 12 20 14 12 19 43 37 -0.94 15 0 0 20 5 34 18 36 46.9 42 142 -20 20 13 16 19 57 53 20 20 54 19 50 18 -0.94 16 0 0 20 12 45 18 36 34.2 43 143 -21 20 20 27 20 5 4 20 28 6 19 57 28 -0.94 17 0 0 20 20 26 18 36 21.5 43 144 -22 20 28 9 20 12 44 20 35 48 20 5 8 -0.94 18 0 0 20 28 36 18 36 8.7 43 146 -23 20 36 20 20 20 54 20 44 0 20 13 17 -0.95 19 0 0 20 37 17 18 35 55.7 44 147 -24 20 45 1 20 29 34 20 52 41 20 21 56 -0.95 20 0 0 20 46 26 18 35 42.7 44 148 -24 20 54 11 20 38 43 21 1 53 20 31 4 -0.95 21 0 0 20 56 5 18 35 29.6 45 149 -25 21 3 51 20 48 21 21 11 33 20 40 42 -0.95 22 0 0 21 6 13 18 35 16.4 45 150 -26 21 14 0 20 58 28 21 21 42 20 50 48 -0.95 23 0 0 21 16 51 18 35 3.2 45 151 -27 21 24 37 21 9 5 21 32 21 21 1 24 -0.95 24 0 0 21 27 56 18 34 49.9 45 153 -27 21 35 44 21 20 10 21 43 29 21 12 28 -0.95 25 0 0 21 39 31 18 34 36.5 46 154 -28 21 47 20 21 31 43 21 55 5 21 24 1 -0.95 26 0 0 21 51 34 18 34 23.1 46 155 -29 21 59 24 21 43 46 22 7 10 21 36 3 -0.95 27 0 0 22 4 6 18 34 9.6 46 156 -30 22 11 57 21 56 17 22 19 44 21 48 33 -0.95 28 0 0 22 17 6 18 33 56.1 46 158 -30 22 24 58 22 9 16 22 32 46 22 1 31 -0.95 29 0 0 22 30 34 18 33 42.5 46 159 -31 22 38 27 22 22 43 22 46 16 22 14 57 -0.95 30 0 0 22 44 30 18 33 29.0 46 160 -32 22 52 24 22 36 38 23 0 14 22 28 51 -0.95 31 0 0 22 58 54 18 33 15.3 46 161 -33 23 6 49 22 51 0 23 14 40 22 43 12 -0.95 32 0 0 23 13 45 18 33 1.7 46 163 -33 23 21 41 23 5 50 23 29 33 22 58 1 -0.95 33 0 0 23 29 4 18 32 48.1 46 164 -34 23 37 1 23 21 8 23 44 54 23 13 17 -0.95 34 0 0 23 44 49 18 32 34.5 46 165 -35 23 52 48 23 36 52 24 0 43 23 29 1 -0.95 35 0 0 24 1 2 18 32 20.8 46 167 -35 24 9 2 23 53 4 24 16 58 23 45 11 -0.95 36 0 0 24 17 41 18 32 7.2 46 168 -36 24 25 42 24 9 42 24 33 40 24 1 48 -0.95 37 0 0 24 34 47 18 31 53.6 46 169 -36 24 42 49 24 26 46 24 50 48 24 18 51 -0.96 38 0 0 24 52 19 18 31 40.0 46 171 -37 25 0 22 24 44 17 25 8 22 24 36 20 -0.96 39 0 0 25 10 17 18 31 26.4 46 172 -38 25 18 22 25 2 13 25 26 23 24 54 15 -0.96 40 0 0 25 28 40 18 31 12.9 46 173 -38 25 36 46 25 20 35 25 44 49 25 12 36 -0.96 41 0 0 25 47 29 18 30 59.4 45 175 -39 25 55 37 25 39 23 26 3 41 25 31 22 -0.96 42 0 0 26 6 43 18 30 46.0 45 176 -39 26 14 52 25 58 35 26 22 58 25 50 33 -0.96 43 0 0 26 26 22 18 30 32.6 45 177 -40 26 34 32 26 18 12 26 42 39 26 10 8 -0.96 44 0 0 26 46 25 18 30 19.2 45 179 -40 26 54 37 26 38 14 27 2 46 26 30 8 -0.96 45 0 0 27 6 52 18 30 6.0 44 180 -41 27 15 6 26 58 39 27 23 16 26 50 32 -0.96 46 0 0 27 27 43 18 29 52.8 44 181 -41 27 35 58 27 19 29 27 44 10 27 11 20 -0.96 47 0 0 27 48 57 18 29 39.7 44 182 -41 27 57 14 27 40 41 28 5 28 27 32 31 -0.96 48 0 0 28 10 34 18 29 26.7 43 183 -42 28 18 53 28 2 17 28 27 8 27 54 5 -0.96 49 0 0 28 32 34 18 29 13.8 43 185 -42 28 40 54 28 24 15 28 49 11 28 16 2 -0.97 50 0 0 28 54 56 18 29 1.0 42 186 -43 29 3 18 28 46 35 29 11 37 28 38 20 -0.97 51 0 0 29 17 39 18 28 48.3 42 187 -43 29 26 3 29 9 17 29 34 23 29 1 1 -0.97 52 0 0 29 40 44 18 28 35.7 41 188 -43 29 49 9 29 32 20 29 57 31 29 24 2 -0.97 53 0 0 30 4 9 18 28 23.2 41 189 -44 30 12 37 29 55 44 30 21 0 29 47 24 -0.97 54 0 0 30 27 55 18 28 10.9 40 190 -44 30 36 24 30 19 28 30 44 50 30 11 6 -0.97 55 0 0 30 52 1 18 27 58.7 40 191 -44 31 0 32 30 43 32 31 8 59 30 35 8 -0.97 56 0 0 31 16 26 18 27 46.7 39 193 -44 31 24 59 31 7 55 31 33 28 30 59 30 -0.97 57 0 0 31 41 10 18 27 34.8 39 194 -44 31 49 44 31 32 37 31 58 15 31 24 10 -0.97 58 0 0 32 6 12 18 27 23.1 38 195 -45 32 14 48 31 57 37 32 23 21 31 49 8 -0.97 59 0 0 32 31 32 18 27 11.5 37 196 -45 32 40 10 32 22 55 32 48 44 32 14 24 -0.98 60 0 0 32 57 8 18 27 0.1 37 197 -45 33 5 48 32 48 30 33 14 25 32 39 57 -0.98 61 0 0 33 23 1 18 26 48.9 36 198 -45 33 31 43 33 14 21 33 40 21 33 5 47 -0.98 62 0 0 33 49 10 18 26 37.9 35 199 -45 33 57 54 33 40 28 34 6 34 33 31 52 -0.98 63 0 0 34 15 34 18 26 27.1 35 200 -45 34 24 19 34 6 50 34 33 1 33 58 12 -0.98 64 0 0 34 42 12 18 26 16.4 34 201 -45 34 50 59 34 33 26 34 59 43 34 24 47 -0.98 65 0 0 35 9 4 18 26 6.0 33 201 -45 35 17 53 35 0 16 35 26 39 34 51 35 -0.98 66 0 0 35 36 9 18 25 55.8 33 202 -45 35 45 0 35 27 19 35 53 47 35 18 36 -0.98 67 0 0 36 3 26 18 25 45.7 32 203 -45 36 12 19 35 54 35 36 21 8 35 45 50 -0.98 68 0 0 36 30 55 18 25 36.0 31 204 -44 36 39 50 36 22 2 36 48 41 36 13 15 -0.98 69 0 0 36 58 35 18 25 26.4 30 205 -44 37 7 31 36 49 40 37 16 24 36 40 52 -0.98 70 0 0 37 26 24 18 25 17.0 30 206 -44 37 35 22 37 17 27 37 44 16 37 8 37 -0.99 71 0 0 37 54 22 18 25 7.9 29 207 -44 38 3 22 37 45 24 38 12 18 37 36 32 -0.99 72 0 0 38 22 28 18 24 59.1 28 208 -44 38 31 30 38 13 29 38 40 28 38 4 35 -0.99 73 0 0 38 50 43 18 24 50.5 27 208 -43 38 59 46 38 41 41 39 8 45 38 32 46 -0.99 74 0 0 39 19 3 18 24 42.1 27 209 -43 39 28 8 39 10 0 39 37 10 39 1 4 -0.99 75 0 0 39 47 30 18 24 34.0 26 210 -43 39 56 36 39 38 26 40 5 39 39 29 28 -0.99 76 0 0 40 16 2 18 24 26.1 25 211 -43 40 25 10 40 6 56 40 34 14 39 57 56 -0.99 77 0 0 40 44 37 18 24 18.5 24 212 -42 40 53 46 40 35 29 41 2 52 40 26 28 -0.99 78 0 0 41 13 15 18 24 11.1 23 213 -42 41 22 26 41 4 6 41 31 34 40 55 4 -0.99 79 0 0 41 41 56 18 24 4.0 23 213 -41 41 51 8 41 32 46 42 0 17 41 23 42 -0.99 80 0 0 42 10 38 18 23 57.2 22 214 -41 42 19 52 42 1 26 42 29 2 41 52 21 -0.99 81 0 0 42 39 21 18 23 50.6 21 215 -41 42 48 35 42 30 7 42 57 47 42 21 1 -0.99 82 0 0 43 8 2 18 23 44.3 20 216 -40 43 17 19 42 58 48 43 26 31 42 49 40 -0.99 83 0 0 43 36 43 18 23 38.2 19 216 -40 43 46 0 43 27 27 43 55 14 43 18 18 -0.99 84 0 0 44 5 21 18 23 32.5 19 217 -39 44 14 39 43 56 4 44 23 54 43 46 54 -1.00 85 0 0 44 33 55 18 23 27.0 18 218 -39 44 43 15 44 24 37 44 52 31 44 15 27 -1.00 86 0 0 45 2 26 18 23 21.7 17 219 -38 45 11 46 44 53 7 45 21 3 44 43 55 -1.00 87 0 0 45 30 50 18 23 16.7 16 220 -38 45 40 12 45 21 31 45 49 30 45 12 18 -1.00 88 0 0 45 59 9 18 23 12.0 15 220 -37 46 8 31 45 49 49 46 17 50 45 40 35 -1.00 89 0 0 46 27 21 18 23 7.6 15 221 -37 46 36 44 46 18 0 46 46 3 46 8 46 -1.00 90 0 0 46 55 25 18 23 3.4 14 222 -36 47 4 48 46 46 3 47 14 8 46 36 48 -1.00 91 0 0 47 23 20 18 22 59.4 13 223 -36 47 32 44 47 13 58 47 42 4 47 4 42 -1.00 92 0 0 47 51 6 18 22 55.7 12 223 -35 48 0 30 47 41 43 48 9 51 47 32 27 -1.00 93 0 0 48 18 41 18 22 52.3 11 224 -34 48 28 6 48 9 18 48 37 27 48 0 2 -1.00 94 0 0 48 46 5 18 22 49.1 11 225 -34 48 55 30 48 36 41 49 4 52 48 27 25 -1.00 95 0 0 49 13 17 18 22 46.2 10 226 -33 49 22 42 49 3 53 49 32 4 48 54 36 -1.00 96 0 0 49 40 16 18 22 43.5 9 226 -33 49 49 41 49 30 52 49 59 4 49 21 35 -1.00 97 0 0 50 7 1 18 22 41.1 8 227 -32 50 16 27 49 57 37 50 25 49 49 48 21 -1.01 98 0 0 50 33 32 18 22 38.9 8 228 -32 50 42 58 50 24 9 50 52 20 50 14 52 -1.01 99 0 0 50 59 49 18 22 36.9 7 229 -31 51 9 14 50 50 25 51 18 36 50 41 8 -1.01 100 0 0 51 25 49 18 22 35.1 6 230 -30 51 35 14 51 16 26 51 44 36 51 7 9 -1.01 101 0 0 51 51 33 18 22 33.6 5 230 -30 52 0 58 51 42 10 52 10 20 51 32 54 -1.01 102 0 0 52 17 1 18 22 32.2 5 231 -29 52 26 25 52 7 38 52 35 46 51 58 22 -1.02 103 0 0 52 42 11 18 22 31.1 4 232 -28 52 51 34 52 32 48 53 0 55 52 23 33 -1.02 104 0 0 53 7 2 18 22 30.2 3 233 -28 53 16 26 52 57 41 53 25 45 52 48 26 -1.03 105 0 0 53 31 35 18 22 29.5 2 233 -27 53 40 58 53 22 14 53 50 17 53 13 0 -1.04 106 0 0 53 55 49 18 22 29.0 2 234 -27 54 5 11 53 46 29 54 14 30 53 37 16 -1.06 107 0 0 54 19 44 18 22 28.7 1 235 -26 54 29 5 54 10 25 54 38 22 54 1 12 -1.12 108 0 0 54 43 18 18 22 28.6 0 236 -25 54 52 39 54 34 0 55 1 55 54 24 49 -1.43 Uncertainty in time = +/- 6 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: G202649.5-185048 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 26 49.5358 DE: -18 50 47.664 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 26 49.5357 DE: -18 50 47.665 * position source: Gaia DR3 * standard error: RA,DE [mas]: (1.000,1.200) * V mag [mag]: 10.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2142) Landau asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.50810 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.023", 0.005", 76.738° remarks: * orbital elements for (2142)Landau : Mean anomaly = 116.2938072271 deg Arg. of pericenter = 32.0328884527 deg Long. of node = 155.5633745830 deg Inclination = 0.6646408758 deg Eccentricity = 0.1166543459 Semimajor axis = 3.1657005920 AU Perihelion dist = 2.7964078601 AU Mag: H = 12.21, G = 0.15 Epoch of elements : MJD 60557.77283521 TDT (2024 Sep 04.7728) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,2.77,2024,9,4,18.548029,-0.188226,0.662753,-4.001473,-1.137287,0.003470,0.000831,0.000001,0.000000 44.4753,-18.7653,-98.52,6.79,False G202649.5-185048,20.44709327,-18.8465734,0.00,10.62,0.00,0.0,0,,20.47097141,-18.7652874,0.15,0.00,1,2,2 2142,Landau,17.51,20.400,2.5081,0,0,-0.988,-3.99,,1.6,0 0,116.1586,2024,9,4,32.0329,155.5634,0.6646,0.11665,3.16570,2.79641,12.21,5.0,0.15 1.495,0.0227,0.0055,77,0.0056,Known errors,1.39,0,-1,-1 20240904_185048,60140.54 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 12:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org