IOTA/IOTA-ES occultation update for (259) Aletheia / TYC 0318-01328-1 event on 2008 Apr 16, 04:56 UT Visible from Africa, NE USA, S Canada Summary ------- On 2008 Apr 16 UT, the 179 km diameter asteroid (259) Aletheia will occult a 10.9 mag star in the constellation Virgo for observers along a path across Africa, NE USA, S Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.3 mag to 11.8 mag (the magnitude of the asteroid) for at most 16.1 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2008 Apr 16, 04:49 - 2008 Apr 16, 05:03 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 1.3 * estimated maximum duration [s]: 16.1 * Moon: 84 % sunlit, 57° distance * Sun: 164° distance * rough path description: Africa, NE USA, S Canada The occultation path -------------------- * approximate projected width [km]: 234 * 1 sigma uncertainty interval [path widths]: +/- 0.18 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .024", 104° ) * approx speed of asteroid's shadow [km/s]: 11.0999 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0318-01328-1 by 259 Aletheia on 2008 Apr 16 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude -151 0 0 54 42 33 5 3 29 2 93 0 55 46 33 53 39 33 56 9 51 53 17 6 -150 0 0 54 41 58 5 3 28 3 93 -1 55 45 59 53 38 57 56 9 17 53 16 30 -149 0 0 54 41 12 5 3 28 3 94 -1 55 45 13 53 38 10 56 8 31 53 15 42 -148 0 0 54 40 13 5 3 27 4 95 -2 55 44 16 53 37 11 56 7 34 53 14 43 -147 0 0 54 39 3 5 3 27 4 96 -2 55 43 7 53 36 0 56 6 26 53 13 31 -146 0 0 54 37 42 5 3 26 5 97 -3 55 41 46 53 34 37 56 5 6 53 12 8 -145 0 0 54 36 8 5 3 26 6 98 -3 55 40 14 53 33 2 56 3 34 53 10 33 -144 0 0 54 34 23 5 3 25 6 98 -4 55 38 31 53 31 16 56 1 51 53 8 46 -143 0 0 54 32 27 5 3 24 7 99 -4 55 36 36 53 29 18 55 59 57 53 6 48 -142 0 0 54 30 19 5 3 23 7 100 -5 55 34 29 53 27 8 55 57 51 53 4 37 -141 0 0 54 27 59 5 3 22 8 101 -6 55 32 11 53 24 47 55 55 33 53 2 15 -140 0 0 54 25 27 5 3 21 9 102 -6 55 29 42 53 22 13 55 53 5 52 59 41 -139 0 0 54 22 44 5 3 20 9 102 -7 55 27 1 53 19 28 55 50 24 52 56 56 -138 0 0 54 19 50 5 3 18 10 103 -7 55 24 8 53 16 32 55 47 33 52 53 59 -137 0 0 54 16 44 5 3 17 10 104 -8 55 21 4 53 13 24 55 44 29 52 50 50 -136 0 0 54 13 26 5 3 16 11 105 -8 55 17 49 53 10 4 55 41 15 52 47 29 -135 0 0 54 9 57 5 3 14 11 106 -9 55 14 22 53 6 32 55 37 49 52 43 57 -134 0 0 54 6 16 5 3 13 12 107 -9 55 10 43 53 2 49 55 34 11 52 40 12 -133 0 0 54 2 23 5 3 11 13 107 -10 55 6 53 52 58 54 55 30 22 52 36 17 -132 0 0 53 58 19 5 3 9 13 108 -10 55 2 52 52 54 48 55 26 22 52 32 9 -131 0 0 53 54 4 5 3 7 14 109 -11 54 58 39 52 50 29 55 22 10 52 27 50 -130 0 0 53 49 37 5 3 6 14 110 -11 54 54 15 52 46 0 55 17 47 52 23 20 -129 0 0 53 44 58 5 3 4 15 111 -12 54 49 40 52 41 18 55 13 13 52 18 37 -128 0 0 53 40 9 5 3 2 15 111 -12 54 44 53 52 36 26 55 8 27 52 13 44 -127 0 0 53 35 7 5 2 59 16 112 -13 54 39 54 52 31 21 55 3 30 52 8 38 -126 0 0 53 29 54 5 2 57 17 113 -13 54 34 45 52 26 5 54 58 21 52 3 21 -125 0 0 53 24 30 5 2 55 17 114 -14 54 29 24 52 20 38 54 53 1 51 57 53 -124 0 0 53 18 54 5 2 53 18 115 -14 54 23 51 52 14 59 54 47 30 51 52 13 -123 0 0 53 13 7 5 2 50 18 116 -15 54 18 7 52 9 9 54 41 47 51 46 21 -122 0 0 53 7 8 5 2 48 19 117 -16 54 12 12 52 3 7 54 35 54 51 40 18 -121 0 0 53 0 58 5 2 45 19 117 -16 54 6 6 51 56 53 54 29 48 51 34 4 -120 0 0 52 54 37 5 2 42 20 118 -17 53 59 48 51 50 29 54 23 32 51 27 38 -119 0 0 52 48 4 5 2 40 21 119 -17 53 53 19 51 43 53 54 17 4 51 21 1 -118 0 0 52 41 20 5 2 37 21 120 -18 53 46 38 51 37 5 54 10 25 51 14 12 -117 0 0 52 34 25 5 2 34 22 121 -18 53 39 47 51 30 7 54 3 35 51 7 12 -116 0 0 52 27 19 5 2 31 22 122 -19 53 32 44 51 22 57 53 56 34 51 0 1 -115 0 0 52 20 1 5 2 28 23 123 -19 53 25 30 51 15 36 53 49 21 50 52 39 -114 0 0 52 12 32 5 2 24 24 123 -19 53 18 5 51 8 3 53 41 57 50 45 5 -113 0 0 52 4 52 5 2 21 24 124 -20 53 10 29 51 0 20 53 34 23 50 37 21 -112 0 0 51 57 1 5 2 18 25 125 -20 53 2 42 50 52 25 53 26 37 50 29 25 -111 0 0 51 48 59 5 2 14 25 126 -21 52 54 43 50 44 20 53 18 40 50 21 18 -110 0 0 51 40 46 5 2 11 26 127 -21 52 46 34 50 36 3 53 10 32 50 13 0 -109 0 0 51 32 22 5 2 7 26 128 -22 52 38 14 50 27 35 53 2 13 50 4 31 -108 0 0 51 23 47 5 2 3 27 129 -22 52 29 43 50 18 57 52 53 43 49 55 51 -107 0 0 51 15 2 5 1 59 28 130 -23 52 21 1 50 10 7 52 45 3 49 47 0 -106 0 0 51 6 5 5 1 56 28 131 -23 52 12 8 50 1 7 52 36 11 49 37 59 -105 0 0 50 56 58 5 1 52 29 132 -24 52 3 4 49 51 56 52 27 9 49 28 47 -104 0 0 50 47 40 5 1 47 29 132 -24 51 53 50 49 42 35 52 17 57 49 19 24 -103 0 0 50 38 11 5 1 43 30 133 -25 51 44 25 49 33 3 52 8 33 49 9 51 -102 0 0 50 28 32 5 1 39 30 134 -25 51 34 50 49 23 20 51 58 59 49 0 7 -101 0 0 50 18 43 5 1 35 31 135 -26 51 25 4 49 13 27 51 49 15 48 50 13 -100 0 0 50 8 43 5 1 30 31 136 -26 51 15 8 49 3 24 51 39 20 48 40 8 - 99 0 0 49 58 33 5 1 26 32 137 -26 51 5 2 48 53 10 51 29 15 48 29 54 - 98 0 0 49 48 12 5 1 21 33 138 -27 50 54 45 48 42 47 51 18 59 48 19 29 - 97 0 0 49 37 42 5 1 16 33 139 -27 50 44 18 48 32 13 51 8 34 48 8 54 - 96 0 0 49 27 2 5 1 12 34 140 -28 50 33 41 48 21 30 50 57 58 47 58 9 - 95 0 0 49 16 11 5 1 7 34 141 -28 50 22 54 48 10 36 50 47 12 47 47 15 - 94 0 0 49 5 11 5 1 2 35 142 -29 50 11 57 47 59 33 50 36 17 47 36 11 - 93 0 0 48 54 2 5 0 57 35 143 -29 50 0 51 47 48 20 50 25 12 47 24 57 - 92 0 0 48 42 43 5 0 52 36 144 -29 49 49 35 47 36 58 50 13 57 47 13 34 - 91 0 0 48 31 14 5 0 46 36 145 -30 49 38 9 47 25 26 50 2 33 47 2 1 - 90 0 0 48 19 36 5 0 41 37 146 -30 49 26 35 47 13 46 49 50 59 46 50 19 - 89 0 0 48 7 49 5 0 36 37 147 -30 49 14 50 47 1 56 49 39 16 46 38 29 - 88 0 0 47 55 53 5 0 30 38 148 -31 49 2 57 46 49 57 49 27 24 46 26 29 - 87 0 0 47 43 48 5 0 24 38 149 -31 48 50 55 46 37 50 49 15 23 46 14 20 - 86 0 0 47 31 34 5 0 19 39 151 -32 48 38 44 46 25 33 49 3 13 46 2 3 - 85 0 0 47 19 12 5 0 13 39 152 -32 48 26 24 46 13 9 48 50 54 45 49 38 - 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69 0 0 43 44 21 4 58 30 46 172 -36 44 51 58 42 37 54 45 16 37 42 14 15 - 68 0 0 43 30 2 4 58 23 47 173 -36 44 37 40 42 23 35 45 2 19 41 59 56 - 67 0 0 43 15 39 4 58 15 47 174 -36 44 23 17 42 9 11 44 47 56 41 45 32 - 66 0 0 43 1 11 4 58 8 47 176 -36 44 8 49 41 54 43 44 33 28 41 31 4 - 65 0 0 42 46 39 4 58 1 48 177 -36 43 54 17 41 40 11 44 18 56 41 16 31 - 64 0 0 42 32 2 4 57 54 48 179 -36 43 39 40 41 25 34 44 4 20 41 1 55 - 63 0 0 42 17 22 4 57 46 48 180 -37 43 25 0 41 10 54 43 49 39 40 47 15 - 62 0 0 42 2 38 4 57 39 48 181 -37 43 10 16 40 56 11 43 34 55 40 32 32 - 61 0 0 41 47 52 4 57 31 48 183 -37 42 55 29 40 41 25 43 20 7 40 17 46 - 60 0 0 41 33 2 4 57 24 49 184 -37 42 40 38 40 26 35 43 5 17 40 2 56 - 59 0 0 41 18 9 4 57 16 49 186 -37 42 25 45 40 11 43 42 50 23 39 48 5 - 58 0 0 41 3 14 4 57 8 49 187 -37 42 10 49 39 56 49 42 35 27 39 33 11 - 57 0 0 40 48 17 4 57 1 49 189 -37 41 55 51 39 41 53 42 20 29 39 18 15 - 56 0 0 40 33 18 4 56 53 49 190 -37 41 40 51 39 26 56 42 5 28 39 3 18 - 55 0 0 40 18 18 4 56 45 49 192 -37 41 25 50 39 11 57 41 50 26 38 48 19 - 54 0 0 40 3 17 4 56 37 49 193 -36 41 10 47 38 56 56 41 35 23 38 33 20 - 53 0 0 39 48 14 4 56 30 50 195 -36 40 55 43 38 41 55 41 20 19 38 18 19 - 52 0 0 39 33 11 4 56 22 50 197 -36 40 40 39 38 26 54 41 5 14 38 3 18 - 51 0 0 39 18 8 4 56 14 50 198 -36 40 25 34 38 11 53 40 50 8 37 48 17 - 50 0 0 39 3 5 4 56 6 50 200 -36 40 10 29 37 56 51 40 35 2 37 33 17 - 49 0 0 38 48 2 4 55 58 50 201 -36 39 55 24 37 41 50 40 19 57 37 18 16 - 48 0 0 38 33 0 4 55 50 50 203 -36 39 40 20 37 26 50 40 4 52 37 3 17 - 47 0 0 38 17 59 4 55 42 49 204 -35 39 25 16 37 11 51 39 49 48 36 48 18 - 46 0 0 38 2 59 4 55 34 49 206 -35 39 10 14 36 56 53 39 34 45 36 33 21 - 45 0 0 37 48 1 4 55 26 49 207 -35 38 55 14 36 41 57 39 19 43 36 18 26 - 44 0 0 37 33 5 4 55 18 49 209 -35 38 40 15 36 27 3 39 4 43 36 3 33 - 43 0 0 37 18 10 4 55 10 49 210 -34 38 25 18 36 12 11 38 49 46 35 48 42 - 42 0 0 37 3 19 4 55 2 49 212 -34 38 10 24 35 57 22 38 34 51 35 33 54 - 41 0 0 36 48 30 4 54 54 49 213 -34 37 55 33 35 42 36 38 19 58 35 19 9 - 40 0 0 36 33 45 4 54 46 48 215 -34 37 40 44 35 27 54 38 5 9 35 4 27 - 39 0 0 36 19 3 4 54 38 48 216 -33 37 26 0 35 13 15 37 50 23 34 49 49 - 38 0 0 36 4 25 4 54 30 48 218 -33 37 11 19 34 58 39 37 35 41 34 35 15 - 37 0 0 35 49 51 4 54 22 47 219 -32 36 56 42 34 44 8 37 21 3 34 20 45 - 36 0 0 35 35 22 4 54 14 47 220 -32 36 42 9 34 29 42 37 6 30 34 6 19 - 35 0 0 35 20 57 4 54 6 47 222 -32 36 27 42 34 15 20 36 52 1 33 51 59 - 34 0 0 35 6 38 4 53 58 46 223 -31 36 13 19 34 1 4 36 37 37 33 37 43 - 33 0 0 34 52 24 4 53 50 46 224 -31 35 59 2 33 46 53 36 23 18 33 23 34 - 32 0 0 34 38 16 4 53 42 46 226 -30 35 44 50 33 32 48 36 9 6 33 9 30 - 31 0 0 34 24 14 4 53 35 45 227 -30 35 30 45 33 18 49 35 54 59 32 55 32 - 30 0 0 34 10 18 4 53 27 45 228 -30 35 16 45 33 4 57 35 40 58 32 41 40 - 29 0 0 33 56 29 4 53 19 44 230 -29 35 2 53 32 51 11 35 27 4 32 27 56 - 28 0 0 33 42 47 4 53 11 44 231 -29 34 49 7 32 37 32 35 13 18 32 14 18 - 27 0 0 33 29 12 4 53 4 43 232 -28 34 35 29 32 24 0 34 59 38 32 0 48 - 26 0 0 33 15 44 4 52 56 43 233 -27 34 21 58 32 10 36 34 46 6 31 47 25 - 25 0 0 33 2 25 4 52 49 42 234 -27 34 8 35 31 57 21 34 32 42 31 34 10 - 24 0 0 32 49 14 4 52 41 42 235 -26 33 55 21 31 44 13 34 19 26 31 21 3 - 23 0 0 32 36 11 4 52 34 41 236 -26 33 42 15 31 31 14 34 6 18 31 8 5 - 22 0 0 32 23 18 4 52 26 41 237 -25 33 29 17 31 18 23 33 53 19 30 55 16 - 21 0 0 32 10 33 4 52 19 40 239 -25 33 16 29 31 5 42 33 40 30 30 42 36 - 20 0 0 31 57 57 4 52 12 40 240 -24 33 3 50 30 53 10 33 27 49 30 30 5 - 19 0 0 31 45 32 4 52 5 39 241 -23 32 51 20 30 40 47 33 15 19 30 17 44 - 18 0 0 31 33 16 4 51 58 38 242 -23 32 39 1 30 28 35 33 2 58 30 5 33 - 17 0 0 31 21 10 4 51 51 38 242 -22 32 26 52 30 16 33 32 50 47 29 53 32 - 16 0 0 31 9 15 4 51 44 37 243 -22 32 14 53 30 4 41 32 38 47 29 41 41 - 15 0 0 30 57 31 4 51 37 36 244 -21 32 3 5 29 53 0 32 26 58 29 30 1 - 14 0 0 30 45 57 4 51 31 36 245 -20 31 51 28 29 41 30 32 15 20 29 18 32 - 13 0 0 30 34 35 4 51 24 35 246 -20 31 40 3 29 30 11 32 3 53 29 7 14 - 12 0 0 30 23 24 4 51 18 34 247 -19 31 28 49 29 19 3 31 52 38 28 56 8 - 11 0 0 30 12 25 4 51 11 34 248 -18 31 17 46 29 8 8 31 41 34 28 45 13 - 10 0 0 30 1 39 4 51 5 33 248 -18 31 6 56 28 57 24 31 30 43 28 34 31 - 9 0 0 29 51 4 4 50 59 32 249 -17 30 56 18 28 46 53 31 20 4 28 24 1 - 8 0 0 29 40 42 4 50 53 31 250 -16 30 45 53 28 36 34 31 9 37 28 13 43 - 7 0 0 29 30 33 4 50 47 31 251 -15 30 35 41 28 26 28 30 59 24 28 3 38 - 6 0 0 29 20 37 4 50 41 30 252 -15 30 25 41 28 16 34 30 49 23 27 53 45 - 5 0 0 29 10 54 4 50 36 29 252 -14 30 15 55 28 6 54 30 39 36 27 44 6 - 4 0 0 29 1 24 4 50 30 28 253 -13 30 6 22 27 57 27 30 30 2 27 34 41 - 3 0 0 28 52 8 4 50 25 28 254 -12 29 57 4 27 48 14 30 20 42 27 25 28 - 2 0 0 28 43 6 4 50 20 27 254 -12 29 47 59 27 39 15 30 11 36 27 16 30 - 1 0 0 28 34 18 4 50 15 26 255 -11 29 39 8 27 30 30 30 2 44 27 7 46 0 0 0 28 25 44 4 50 10 25 256 -10 29 30 31 27 21 59 29 54 7 26 59 16 1 0 0 28 17 25 4 50 5 25 256 -9 29 22 10 27 13 42 29 45 44 26 51 0 2 0 0 28 9 21 4 50 0 24 257 -9 29 14 3 27 5 40 29 37 36 26 42 59 3 0 0 28 1 31 4 49 55 23 257 -8 29 6 11 26 57 53 29 29 43 26 35 13 4 0 0 27 53 57 4 49 51 22 258 -7 28 58 34 26 50 21 29 22 5 26 27 41 5 0 0 27 46 38 4 49 47 21 259 -6 28 51 12 26 43 4 29 14 43 26 20 25 6 0 0 27 39 34 4 49 43 20 259 -5 28 44 6 26 36 2 29 7 36 26 13 24 7 0 0 27 32 46 4 49 39 20 260 -4 28 37 16 26 29 16 29 0 45 26 6 39 8 0 0 27 26 13 4 49 35 19 260 -4 28 30 41 26 22 46 28 54 10 26 0 9 9 0 0 27 19 57 4 49 31 18 261 -3 28 24 23 26 16 31 28 47 51 25 53 55 10 0 0 27 13 57 4 49 28 17 261 -2 28 18 21 26 10 33 28 41 48 25 47 57 11 0 0 27 8 13 4 49 24 16 262 -1 28 12 35 26 4 50 28 36 1 25 42 16 12 0 0 27 2 45 4 49 21 15 262 0 28 7 6 25 59 25 28 30 32 25 36 50 Uncertainty in time = +/- 4 secs [Prediction of 2008 Apr 15.0] Data for the target star ------------------------ * name: TYC 0318-01328-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 14 24 16.6179 DE: +00 16 25.774 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .019 ) * V mag [mag]: 10.9 * B mag [mag]: 11.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (259) Aletheia approx. diameter [km]: 179 approx. diameter ["]: .132 distance from Earth [AU]: 1.86900 * orbital information: orbit source: Preston date of fit: 2008 Apr 15 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 798 number of rejected observations: 99 time covered by the observations: 1904 Oct 09 - 2008 Apr 15 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.014, 115° remarks: * orbital elements for (259) Aletheia : Mean anomaly = 323.66390734 deg Arg. of pericenter = 169.22136287 deg Long. of node = 87.14170877 deg Inclination = 10.81804851 deg Eccentricity = 0.12204550 Semimajor axis = 3.13795958 AU Perihelion dist = 2.75498572 AU Mag: H = 7.80, G = 0.15 Epoch of elements : MJD 54572.20600000 TDT (2008 Apr 16.206) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Apr 16 259 Aletheia 4h 56.2m UT 10.9 14 24 16.618 0 16 25.77TYC 0318-01328-1 11.7 11.8 179 16.1 1.869 -1.906 7.22 -62.6945 0.273 105.90 10.26 4.9367 0.15851 0.62621 -6.07389 1.53593 -0.00110 -0.00104 2000 323.2727612008 414.00000169.221363 87.141709 10.8180490.12204550 3.1379596 2.7549857 7.8 5.00.15 RATE 1.7731000 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.024 104 1.18 0.024 0 54571.5020080416_1328-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 15, 14:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org