IOTA/IOTA-ES occultation update for (2) Pallas / UCAC4 454-035083 event on 2023 Apr 18, 04:27 UT Visible from W USA, Canada Summary ------- On 2023 Apr 18 UT, the 532 km diameter asteroid (2) Pallas will occult a 12.2 mag star in the constellation Canis Minor for observers along a path across W USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.03 mag to 8.47 mag (the magnitude of the asteroid) for at most 19.380 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: 100 * date and approx. time of event: 2023 Apr 18, 04:24 - 2023 Apr 18, 04:31 * geocentric midpoint of event [JD]: 2460052.68605612 * magnitude of target star: 12.20 * magnitude drop [mag]: 0.03 * estimated maximum duration [s]: 19.380 * Moon: 5 % sunlit, 109° distance * Sun: 87° distance * rough path description: W USA, Canada Additional comments ------------------- very low mag drop The occultation path -------------------- * approximate projected width [km]: 570 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.035, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.036", 0.013", 79°) * approx speed of asteroid's shadow [km/s]: 27.4466 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 454-035083 by 2 Pallas on 2023 Apr 18 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 111 0 0 -10 56 47 4 24 18.5 0 89 68 -13 30 6 - 8 20 46 -13 44 20 - 8 6 0 .... 112 0 0 -10 55 32 4 24 18.5 1 89 68 -13 28 53 - 8 19 28 -13 43 7 - 8 4 41 -0.24 113 0 0 -10 53 41 4 24 18.7 2 89 68 -13 27 6 - 8 17 34 -13 41 21 - 8 2 47 -0.31 114 0 0 -10 51 15 4 24 18.9 3 89 68 -13 24 44 - 8 15 4 -13 38 59 - 8 0 16 -0.33 115 0 0 -10 48 14 4 24 19.1 4 88 68 -13 21 48 - 8 11 57 -13 36 4 - 7 57 9 -0.35 116 0 0 -10 44 38 4 24 19.5 5 88 68 -13 18 18 - 8 8 14 -13 32 34 - 7 53 26 -0.35 117 0 0 -10 40 25 4 24 19.9 6 88 68 -13 14 13 - 8 3 54 -13 28 29 - 7 49 5 -0.36 118 0 0 -10 35 38 4 24 20.4 7 88 68 -13 9 33 - 7 58 59 -13 23 50 - 7 44 9 -0.36 119 0 0 -10 30 15 4 24 21.0 8 88 68 -13 4 18 - 7 53 26 -13 18 37 - 7 38 35 -0.37 120 0 0 -10 24 16 4 24 21.6 9 88 68 -12 58 29 - 7 47 17 -13 12 48 - 7 32 25 -0.37 121 0 0 -10 17 42 4 24 22.4 10 87 68 -12 52 5 - 7 40 32 -13 6 25 - 7 25 39 -0.37 122 0 0 -10 10 31 4 24 23.2 11 87 68 -12 45 7 - 7 33 9 -12 59 28 - 7 18 15 -0.37 123 0 0 -10 2 45 4 24 24.0 12 87 67 -12 37 33 - 7 25 10 -12 51 55 - 7 10 15 -0.38 124 0 0 - 9 54 23 4 24 25.0 13 87 67 -12 29 24 - 7 16 34 -12 43 47 - 7 1 37 -0.38 125 0 0 - 9 45 25 4 24 26.0 14 87 67 -12 20 40 - 7 7 21 -12 35 5 - 6 52 23 -0.38 126 0 0 - 9 35 51 4 24 27.1 15 87 66 -12 11 21 - 6 57 31 -12 25 47 - 6 42 32 -0.38 127 0 0 - 9 25 41 4 24 28.3 16 86 66 -12 1 27 - 6 47 4 -12 15 54 - 6 32 3 -0.38 128 0 0 - 9 14 55 4 24 29.5 17 86 66 -11 50 57 - 6 36 0 -12 5 26 - 6 20 58 -0.38 129 0 0 - 9 3 33 4 24 30.9 18 86 65 -11 39 53 - 6 24 19 -11 54 23 - 6 9 15 -0.38 130 0 0 - 8 51 34 4 24 32.3 19 86 65 -11 28 12 - 6 12 1 -11 42 45 - 5 56 54 -0.38 131 0 0 - 8 38 59 4 24 33.8 20 86 64 -11 15 57 - 5 59 5 -11 30 31 - 5 43 57 -0.38 132 0 0 - 8 25 47 4 24 35.3 21 86 64 -11 3 5 - 5 45 33 -11 17 41 - 5 30 22 -0.38 133 0 0 - 8 11 59 4 24 37.0 22 86 63 -10 49 38 - 5 31 22 -11 4 16 - 5 16 10 -0.38 134 0 0 - 7 57 35 4 24 38.7 23 86 63 -10 35 36 - 5 16 35 -10 50 15 - 5 1 20 -0.38 135 0 0 - 7 42 34 4 24 40.5 24 86 62 -10 20 57 - 5 1 10 -10 35 39 - 4 45 53 -0.38 136 0 0 - 7 26 56 4 24 42.3 25 86 61 -10 5 43 - 4 45 8 -10 20 27 - 4 29 48 -0.39 137 0 0 - 7 10 42 4 24 44.3 26 86 61 - 9 49 53 - 4 28 28 -10 4 39 - 4 13 5 -0.39 138 0 0 - 6 53 51 4 24 46.3 27 86 60 - 9 33 27 - 4 11 10 - 9 48 16 - 3 55 46 -0.39 139 0 0 - 6 36 24 4 24 48.4 28 86 59 - 9 16 26 - 3 53 15 - 9 31 16 - 3 37 48 -0.39 140 0 0 - 6 18 19 4 24 50.6 29 86 59 - 8 58 48 - 3 34 43 - 9 13 41 - 3 19 13 -0.39 141 0 0 - 5 59 39 4 24 52.9 30 86 58 - 8 40 34 - 3 15 33 - 8 55 30 - 3 0 0 -0.39 142 0 0 - 5 40 21 4 24 55.2 31 86 57 - 8 21 45 - 2 55 46 - 8 36 43 - 2 40 10 -0.39 143 0 0 - 5 20 27 4 24 57.7 32 86 57 - 8 2 20 - 2 35 21 - 8 17 20 - 2 19 43 -0.39 144 0 0 - 4 59 56 4 25 0.2 33 86 56 - 7 42 18 - 2 14 20 - 7 57 22 - 1 58 38 -0.39 145 0 0 - 4 38 49 4 25 2.8 34 86 55 - 7 21 41 - 1 52 40 - 7 36 48 - 1 36 55 -0.39 146 0 0 - 4 17 5 4 25 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20 4 25 47.1 49 90 44 - 1 31 27 4 13 53 - 1 47 16 4 30 27 -0.39 160 0 0 1 49 13 4 25 50.8 50 91 43 - 1 2 11 4 44 24 - 1 18 3 5 1 2 -0.39 161 0 0 2 19 37 4 25 54.6 51 92 42 - 0 32 22 5 15 28 - 0 48 19 5 32 9 -0.39 162 0 0 2 50 34 4 25 58.5 52 92 41 - 0 2 3 5 47 3 - 0 18 2 6 3 48 -0.39 163 0 0 3 22 1 4 26 2.4 53 93 40 0 28 48 6 19 9 0 12 46 6 35 58 -0.39 164 0 0 3 53 59 4 26 6.4 54 94 39 1 0 10 6 51 46 0 44 4 7 8 39 -0.39 165 0 0 4 26 27 4 26 10.4 55 95 38 1 32 2 7 24 52 1 15 52 7 41 49 -0.39 166 0 0 4 59 24 4 26 14.5 56 96 38 2 4 23 7 58 28 1 48 10 8 15 28 -0.39 167 0 0 5 32 49 4 26 18.7 57 97 37 2 37 12 8 32 31 2 20 56 8 49 35 -0.39 168 0 0 6 6 42 4 26 22.9 58 98 36 3 10 30 9 7 2 2 54 11 9 24 10 -0.39 169 0 0 6 41 2 4 26 27.2 58 99 35 3 44 14 9 41 59 3 27 52 9 59 11 -0.39 170 0 0 7 15 48 4 26 31.5 59 101 34 4 18 25 10 17 22 4 2 0 10 34 37 -0.39 171 0 0 7 50 58 4 26 35.9 60 102 33 4 53 2 10 53 9 4 36 33 11 10 28 -0.39 172 0 0 8 26 33 4 26 40.3 61 104 32 5 28 3 11 29 20 5 11 31 11 46 42 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19 -0.39 -161 0 0 25 43 6 4 28 45.5 65 179 8 22 36 36 28 54 22 22 19 21 29 12 34 -0.39 -160 0 0 26 21 10 4 28 49.9 64 181 7 23 14 44 29 32 22 22 57 29 29 50 33 -0.38 -159 0 0 26 59 0 4 28 54.2 64 184 6 23 52 40 30 10 5 23 35 25 30 28 16 -0.38 -158 0 0 27 36 33 4 28 58.5 63 186 5 24 30 20 30 47 31 24 13 7 31 5 40 -0.38 -157 0 0 28 13 50 4 29 2.7 62 188 5 25 7 46 31 24 37 24 50 33 31 42 46 -0.38 -156 0 0 28 50 47 4 29 6.9 62 190 4 25 44 54 32 1 23 25 27 42 32 19 31 -0.38 -155 0 0 29 27 26 4 29 11.0 61 192 3 26 21 45 32 37 48 26 4 34 32 55 54 -0.38 -154 0 0 30 3 43 4 29 15.0 60 194 2 26 58 17 33 13 50 26 41 7 33 31 55 -0.38 -153 0 0 30 39 39 4 29 19.0 59 195 2 27 34 28 33 49 30 27 17 20 34 7 33 -0.38 -152 0 0 31 15 13 4 29 22.9 58 197 1 28 10 19 34 24 45 27 53 12 34 42 46 -0.38 -151 0 0 31 50 23 4 29 26.8 58 198 0 28 45 47 34 59 35 28 28 42 35 17 35 -0.38 -150 0 0 32 25 9 4 29 30.6 57 200 -1 29 20 53 35 34 0 29 3 50 35 51 57 -0.38 -149 0 0 32 59 30 4 29 34.3 56 201 -1 29 55 35 36 7 57 29 38 34 36 25 52 -0.38 -148 0 0 33 33 24 4 29 37.9 55 203 -2 30 29 52 36 41 28 30 12 53 36 59 21 -0.38 -147 0 0 34 6 53 4 29 41.5 54 204 -3 31 3 44 37 14 30 30 46 47 37 32 21 -0.38 -146 0 0 34 39 53 4 29 45.0 53 205 -3 31 37 10 37 47 4 31 20 15 38 4 52 -0.38 -145 0 0 35 12 27 4 29 48.5 53 207 -4 32 10 9 38 19 9 31 53 17 38 36 54 -0.38 -144 0 0 35 44 31 4 29 51.9 52 208 -5 32 42 41 38 50 45 32 25 51 39 8 27 -0.38 -143 0 0 36 16 7 4 29 55.2 51 209 -5 33 14 45 39 21 50 32 57 58 39 39 29 -0.38 -142 0 0 36 47 13 4 29 58.4 50 210 -6 33 46 21 39 52 26 33 29 36 40 10 2 -0.38 -141 0 0 37 17 50 4 30 1.6 49 211 -6 34 17 28 40 22 30 34 0 46 40 40 3 -0.38 -140 0 0 37 47 57 4 30 4.7 48 213 -7 34 48 5 40 52 3 34 31 26 41 9 33 -0.38 -139 0 0 38 17 33 4 30 7.7 47 214 -8 35 18 13 41 21 6 35 1 37 41 38 32 -0.38 -138 0 0 38 46 38 4 30 10.7 47 215 -8 35 47 51 41 49 36 35 31 17 42 6 59 -0.38 -137 0 0 39 15 13 4 30 13.5 46 216 -9 36 16 59 42 17 36 36 0 28 42 34 55 -0.38 -136 0 0 39 43 16 4 30 16.4 45 217 -9 36 45 36 42 45 3 36 29 8 43 2 19 -0.38 -135 0 0 40 10 48 4 30 19.1 44 218 -10 37 13 42 43 11 59 36 57 17 43 29 11 -0.38 -134 0 0 40 37 49 4 30 21.8 43 219 -10 37 41 17 43 38 23 37 24 56 43 55 31 -0.38 -133 0 0 41 4 18 4 30 24.4 42 220 -11 38 8 22 44 4 14 37 52 3 44 21 20 -0.38 -132 0 0 41 30 16 4 30 26.9 42 221 -11 38 34 55 44 29 35 38 18 40 44 46 36 -0.38 -131 0 0 41 55 42 4 30 29.4 41 221 -12 39 0 57 44 54 23 38 44 45 45 11 21 -0.38 -130 0 0 42 20 37 4 30 31.8 40 222 -12 39 26 27 45 18 39 39 10 19 45 35 33 -0.38 -129 0 0 42 45 0 4 30 34.2 39 223 -13 39 51 27 45 42 24 39 35 21 45 59 15 -0.38 -128 0 0 43 8 52 4 30 36.5 38 224 -13 40 15 55 46 5 38 39 59 53 46 22 24 -0.38 -127 0 0 43 32 13 4 30 38.7 38 225 -14 40 39 51 46 28 20 40 23 53 46 45 3 -0.38 -126 0 0 43 55 2 4 30 40.9 37 226 -14 41 3 17 46 50 31 40 47 22 47 7 10 -0.38 -125 0 0 44 17 21 4 30 43.0 36 227 -15 41 26 11 47 12 11 41 10 20 47 28 46 -0.38 -124 0 0 44 39 8 4 30 45.0 35 228 -15 41 48 35 47 33 20 41 32 46 47 49 51 -0.38 -123 0 0 45 0 25 4 30 47.0 35 229 -15 42 10 28 47 53 58 41 54 42 48 10 26 -0.38 -122 0 0 45 21 11 4 30 48.9 34 229 -16 42 31 50 48 14 7 42 16 7 48 30 31 -0.38 -121 0 0 45 41 27 4 30 50.8 33 230 -16 42 52 41 48 33 45 42 37 2 48 50 5 -0.38 -120 0 0 46 1 13 4 30 52.6 32 231 -17 43 13 2 48 52 53 42 57 26 49 9 10 -0.38 -119 0 0 46 20 28 4 30 54.4 32 232 -17 43 32 53 49 11 32 43 17 20 49 27 45 -0.38 -118 0 0 46 39 14 4 30 56.1 31 233 -17 43 52 13 49 29 41 43 36 44 49 45 51 -0.38 -117 0 0 46 57 31 4 30 57.8 30 234 -18 44 11 4 49 47 21 43 55 38 50 3 27 -0.38 -116 0 0 47 15 18 4 30 59.4 29 234 -18 44 29 26 50 4 33 44 14 3 50 20 35 -0.38 -115 0 0 47 32 37 4 31 0.9 29 235 -18 44 47 18 50 21 16 44 31 57 50 37 15 -0.38 -114 0 0 47 49 27 4 31 2.4 28 236 -19 45 4 40 50 37 31 44 49 23 50 53 27 -0.38 -113 0 0 48 5 48 4 31 3.9 27 237 -19 45 21 34 50 53 18 45 6 20 51 9 10 -0.38 -112 0 0 48 21 41 4 31 5.3 26 238 -19 45 37 59 51 8 37 45 22 48 51 24 26 -0.38 -111 0 0 48 37 6 4 31 6.7 26 239 -20 45 53 56 51 23 29 45 38 47 51 39 15 -0.38 -110 0 0 48 52 4 4 31 8.0 25 239 -20 46 9 24 51 37 54 45 54 19 51 53 37 -0.38 -109 0 0 49 6 34 4 31 9.3 24 240 -20 46 24 25 51 51 52 46 9 22 52 7 32 -0.38 -108 0 0 49 20 37 4 31 10.5 24 241 -21 46 38 57 52 5 24 46 23 57 52 21 1 -0.38 -107 0 0 49 34 14 4 31 11.7 23 242 -21 46 53 3 52 18 30 46 38 5 52 34 4 -0.38 -106 0 0 49 47 23 4 31 12.9 22 243 -21 47 6 41 52 31 10 46 51 46 52 46 41 -0.38 -105 0 0 50 0 7 4 31 14.0 22 243 -21 47 19 52 52 43 24 47 4 59 52 58 52 -0.38 -104 0 0 50 12 24 4 31 15.0 21 244 -22 47 32 36 52 55 13 47 17 46 53 10 39 -0.38 -103 0 0 50 24 16 4 31 16.1 20 245 -22 47 44 53 53 6 37 47 30 6 53 22 0 -0.38 -102 0 0 50 35 42 4 31 17.0 20 246 -22 47 56 45 53 17 36 47 41 59 53 32 56 -0.39 -101 0 0 50 46 42 4 31 18.0 19 247 -22 48 8 10 53 28 11 47 53 27 53 43 28 -0.39 -100 0 0 50 57 18 4 31 18.9 18 247 -22 48 19 9 53 38 21 48 4 29 53 53 36 -0.39 - 99 0 0 51 7 28 4 31 19.8 18 248 -23 48 29 43 53 48 7 48 15 5 54 3 20 -0.39 - 98 0 0 51 17 14 4 31 20.6 17 249 -23 48 39 52 53 57 30 48 25 15 54 12 40 -0.39 - 97 0 0 51 26 36 4 31 21.4 16 250 -23 48 49 35 54 6 29 48 35 0 54 21 37 -0.39 - 96 0 0 51 35 34 4 31 22.2 16 251 -23 48 58 53 54 15 4 48 44 20 54 30 11 -0.39 - 95 0 0 51 44 7 4 31 23.0 15 251 -23 49 7 46 54 23 17 48 53 15 54 38 21 -0.39 - 94 0 0 51 52 17 4 31 23.7 14 252 -24 49 16 15 54 31 7 49 1 46 54 46 9 -0.39 - 93 0 0 52 0 3 4 31 24.3 14 253 -24 49 24 19 54 38 33 49 9 52 54 53 34 -0.39 - 92 0 0 52 7 26 4 31 25.0 13 254 -24 49 32 0 54 45 38 49 17 34 55 0 36 -0.39 - 91 0 0 52 14 25 4 31 25.6 13 255 -24 49 39 16 54 52 20 49 24 51 55 7 17 -0.39 - 90 0 0 52 21 1 4 31 26.2 12 255 -24 49 46 8 54 58 40 49 31 45 55 13 35 -0.39 - 89 0 0 52 27 15 4 31 26.7 11 256 -24 49 52 36 55 4 38 49 38 14 55 19 32 -0.39 - 88 0 0 52 33 6 4 31 27.2 11 257 -25 49 58 41 55 10 14 49 44 20 55 25 6 -0.39 - 87 0 0 52 38 34 4 31 27.7 10 258 -25 50 4 22 55 15 28 49 50 3 55 30 19 -0.39 - 86 0 0 52 43 40 4 31 28.2 9 259 -25 50 9 40 55 20 21 49 55 22 55 35 11 -0.39 - 85 0 0 52 48 23 4 31 28.6 9 259 -25 50 14 35 55 24 53 50 0 18 55 39 41 -0.39 - 84 0 0 52 52 44 4 31 29.0 8 260 -25 50 19 7 55 29 3 50 4 51 55 43 50 -0.39 - 83 0 0 52 56 44 4 31 29.3 8 261 -25 50 23 15 55 32 52 50 9 0 55 47 39 -0.40 - 82 0 0 53 0 21 4 31 29.7 7 262 -25 50 27 1 55 36 20 50 12 47 55 51 6 -0.40 - 81 0 0 53 3 36 4 31 30.0 6 263 -25 50 30 24 55 39 27 50 16 11 55 54 12 -0.40 - 80 0 0 53 6 30 4 31 30.3 6 263 -25 50 33 25 55 42 13 50 19 12 55 56 58 -0.40 - 79 0 0 53 9 1 4 31 30.5 5 264 -26 50 36 2 55 44 39 50 21 50 55 59 22 -0.40 - 78 0 0 53 11 11 4 31 30.8 5 265 -26 50 38 18 55 46 44 50 24 6 56 1 27 -0.41 - 77 0 0 53 13 0 4 31 30.9 4 266 -26 50 40 10 55 48 28 50 25 59 56 3 10 -0.41 - 76 0 0 53 14 27 4 31 31.1 3 267 -26 50 41 41 55 49 51 50 27 29 56 4 33 -0.42 - 75 0 0 53 15 32 4 31 31.3 3 267 -26 50 42 49 55 50 54 50 28 38 56 5 36 -0.42 - 74 0 0 53 16 16 4 31 31.4 2 268 -26 50 43 34 55 51 36 50 29 23 56 6 18 -0.44 - 73 0 0 53 16 39 4 31 31.5 2 269 -26 50 43 57 55 51 58 50 29 46 56 6 40 -0.46 - 72 0 0 53 16 40 4 31 31.5 1 270 -26 50 43 58 55 52 0 50 29 47 56 6 42 -0.50 - 71 0 0 53 16 20 4 31 31.6 0 271 -26 50 43 37 55 51 41 50 29 26 56 6 23 -0.66 Uncertainty in time = +/- 2 secs Prediction of 2023 Mar 1.1 Data for the target star ------------------------ * name: UCAC4 454-035083 * constellation : Canis Minor * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 29 29.8167 DE: +00 47 41.770 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 29 29.8166 DE: +00 47 41.770 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2) Pallas asteroid class: ShapeModel approx. diameter [km]: 532 approx. diameter ["]: 0.375 distance from Earth [AU]: 1.95520 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Feb 07 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): 0.036", 0.013", 78.888° remarks: * orbital elements for (2)Pallas : Mean anomaly = 9.0050713567 deg Arg. of pericenter = 310.8683814800 deg Long. of node = 172.9186283645 deg Inclination = 34.9267274967 deg Eccentricity = 0.2301332231 Semimajor axis = 2.7698108336 AU Perihelion dist = 2.1323853391 AU Mag: H = 4.12, G = 0.11 Epoch of elements : MJD 60052.18604167 TDT (2023 Apr 18.1860) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Feb07,19.38,2023,4,18,4.465347,-0.190464,0.305076,13.143289,8.200248,0.005298,-0.000994,0.000000,-0.000001 -160.3455,0.7458,112.89,10.73,False UCAC4 454-035083,7.49161578,0.7949360,0.00,12.20,0.00,0.0,0,,7.51140230,0.7458114,0.03,0.00,0,0,0 2,Pallas,8.47,532.0,1.9552,0,0,3.942,36.88,,28.2,0 0,8.9653,2023,4,18,310.8684,172.9186,34.9267,0.23013,2.76981,2.13239,4.12,5.0,0.15 1.047,0.0357,0.0130,79,0.0176,Known errors,-1.00,-1,-1,-1 20230418_035083,60004.05 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Mar 01, 01:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org