IOTA/IOTA-ES occultation update for (466) Tisiphone / 2UCAC 19504141 event on 2008 Jul 08, 03:04 UT Visible from Africa, Venezuela, USA Summary ------- On 2008 Jul 08 UT, the 116 km diameter asteroid (466) Tisiphone will occult a 12.5 mag star in the constellation Sagittarius for observers along a path across Africa, Venezuela, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.2 mag to 13.2 mag (the magnitude of the asteroid) for at most 7.9 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 41 * date and approx. time of event: 2008 Jul 08, 02:58 - 2008 Jul 08, 03:11 UT * midpoint of event [JD]: 2454655.62842917 * magnitude of target star: 12.5 * magnitude drop [mag]: 1.2 * estimated maximum duration [s]: 7.9 * Moon: 30 % sunlit, 102° distance * Sun: 167° distance * rough path description: Africa, Venezuela, USA The occultation path -------------------- * approximate projected width [km]: 137 * 1 sigma uncertainty interval [path widths]: +/- 1.62 * 1 sigma uncertainty interval [seconds]: +/- 11.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .106 +/- .109) * 1 sigma uncertainty ellipse (major, minor, PA): ( .109", .106", 360° ) * approx speed of asteroid's shadow [km/s]: 14.5656 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 19504141 by 466 Tisiphone on 2008 Jul 8 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 -113 0 0 43 4 6 3 11 5 2 135 -1 43 56 28 42 12 25 .. .. .. .. .. .. -112 0 0 42 21 31 3 11 5 3 136 -2 43 13 54 41 29 49 46 8 58 .. .. .. -111 0 0 41 38 26 3 11 4 4 136 -3 42 30 50 40 46 45 45 25 54 .. .. .. -110 0 0 40 54 55 3 11 4 5 137 -4 41 47 17 40 3 14 44 42 18 .. .. .. -109 0 0 40 10 57 3 11 3 6 138 -5 41 3 18 39 19 18 43 58 12 36 36 21 -108 0 0 39 26 36 3 11 2 7 138 -6 40 18 53 38 35 0 43 13 38 35 52 11 -107 0 0 38 41 52 3 11 0 8 139 -7 39 34 6 37 50 20 42 28 38 35 7 42 -106 0 0 37 56 49 3 10 59 9 140 -8 38 48 58 37 5 21 41 43 14 34 22 57 -105 0 0 37 11 27 3 10 57 10 140 -9 38 3 31 36 20 5 40 57 27 33 37 57 -104 0 0 36 25 50 3 10 55 11 141 -10 37 17 47 35 34 33 40 11 21 32 52 44 -103 0 0 35 39 58 3 10 53 13 141 -11 36 31 48 34 48 49 39 24 57 32 7 21 -102 0 0 34 53 55 3 10 51 14 142 -12 35 45 37 34 2 53 38 38 17 31 21 49 -101 0 0 34 7 42 3 10 48 15 143 -13 34 59 15 33 16 49 37 51 24 30 36 10 -100 0 0 33 21 22 3 10 46 16 143 -14 34 12 45 32 30 38 37 4 21 29 50 27 - 99 0 0 32 34 56 3 10 43 17 144 -16 33 26 10 31 44 22 36 17 9 29 4 41 - 98 0 0 31 48 28 3 10 40 18 144 -17 32 39 30 30 58 4 35 29 50 28 18 55 - 97 0 0 31 1 58 3 10 36 19 145 -18 31 52 49 30 11 46 34 42 29 27 33 10 - 96 0 0 30 15 29 3 10 33 20 146 -19 31 6 8 29 25 29 33 55 5 26 47 28 - 95 0 0 29 29 4 3 10 29 21 146 -20 30 19 30 28 39 16 33 7 42 26 1 52 - 94 0 0 28 42 44 3 10 25 23 147 -21 29 32 57 27 53 9 32 20 23 25 16 23 - 93 0 0 27 56 32 3 10 21 24 147 -23 28 46 31 27 7 10 31 33 9 24 31 4 - 92 0 0 27 10 29 3 10 17 25 148 -24 28 0 14 26 21 20 30 46 2 23 45 55 - 91 0 0 26 24 38 3 10 12 26 149 -25 27 14 8 25 35 43 29 59 5 23 1 0 - 90 0 0 25 38 59 3 10 8 27 149 -26 26 28 15 24 50 19 29 12 20 22 16 19 - 89 0 0 24 53 36 3 10 3 28 150 -27 25 42 37 24 5 10 28 25 48 21 31 54 - 88 0 0 24 8 30 3 9 58 29 151 -28 24 57 15 23 20 19 27 39 33 20 47 48 - 87 0 0 23 23 43 3 9 53 30 151 -29 24 12 12 22 35 47 26 53 35 20 4 1 - 86 0 0 22 39 16 3 9 47 31 152 -31 23 27 30 21 51 35 26 7 57 19 20 36 - 85 0 0 21 55 11 3 9 42 32 152 -32 22 43 9 21 7 45 25 22 39 18 37 33 - 84 0 0 21 11 29 3 9 36 34 153 -33 21 59 11 20 24 19 24 37 45 17 54 54 - 83 0 0 20 28 12 3 9 30 35 154 -34 21 15 38 19 41 18 23 53 16 17 12 40 - 82 0 0 19 45 22 3 9 24 36 155 -35 20 32 32 18 58 44 23 9 13 16 30 53 - 81 0 0 19 3 0 3 9 18 37 155 -36 19 49 53 18 16 37 22 25 37 15 49 34 - 80 0 0 18 21 6 3 9 12 38 156 -37 19 7 43 17 35 0 21 42 30 15 8 44 - 79 0 0 17 39 43 3 9 5 39 157 -39 18 26 4 16 53 52 20 59 54 14 28 25 - 78 0 0 16 58 51 3 8 59 40 157 -40 17 44 56 16 13 16 20 17 49 13 48 36 - 77 0 0 16 18 32 3 8 52 41 158 -41 17 4 20 15 33 12 19 36 17 13 9 20 - 76 0 0 15 38 45 3 8 45 42 159 -42 16 24 17 14 53 41 18 55 19 12 30 36 - 75 0 0 14 59 33 3 8 38 42 160 -43 15 44 49 14 14 45 18 14 55 11 52 27 - 74 0 0 14 20 56 3 8 31 43 161 -44 15 5 57 13 36 23 17 35 7 11 14 52 - 73 0 0 13 42 56 3 8 24 44 162 -45 14 27 40 12 58 37 16 55 56 10 37 53 - 72 0 0 13 5 31 3 8 17 45 163 -46 13 50 1 12 21 28 16 17 23 10 1 30 - 71 0 0 12 28 45 3 8 10 46 164 -47 13 12 58 11 44 56 15 39 27 9 25 43 - 70 0 0 11 52 36 3 8 2 47 165 -48 12 36 34 11 9 2 15 2 11 8 50 34 - 69 0 0 11 17 6 3 7 55 48 166 -49 12 0 49 10 33 47 14 25 34 8 16 3 - 68 0 0 10 42 15 3 7 48 48 167 -50 11 25 44 9 59 10 13 49 37 7 42 10 - 67 0 0 10 8 3 3 7 40 49 168 -51 10 51 18 9 25 13 13 14 21 7 8 56 - 66 0 0 9 34 32 3 7 32 50 169 -52 10 17 32 8 51 55 12 39 46 6 36 21 - 65 0 0 9 1 41 3 7 25 51 170 -53 9 44 27 8 19 18 12 5 53 6 4 26 - 64 0 0 8 29 31 3 7 17 51 171 -54 9 12 3 7 47 21 11 32 42 5 33 10 - 63 0 0 7 58 2 3 7 9 52 173 -55 8 40 21 7 16 6 11 0 13 5 2 35 - 62 0 0 7 27 15 3 7 1 53 174 -56 8 9 20 6 45 31 10 28 26 4 32 40 - 61 0 0 6 57 9 3 6 54 53 175 -57 7 39 2 6 15 38 9 57 23 4 3 25 - 60 0 0 6 27 45 3 6 46 54 176 -58 7 9 25 5 46 26 9 27 2 3 34 52 - 59 0 0 5 59 3 3 6 38 54 178 -59 6 40 31 5 17 57 8 57 25 3 6 59 - 58 0 0 5 31 3 3 6 30 55 179 -59 6 12 19 4 50 9 8 28 32 2 39 47 - 57 0 0 5 3 46 3 6 22 55 181 -60 5 44 50 4 23 3 8 0 22 2 13 17 - 56 0 0 4 37 11 3 6 14 56 182 -61 5 18 3 3 56 39 7 32 56 1 47 28 - 55 0 0 4 11 19 3 6 6 56 184 -62 4 52 0 3 30 58 7 6 14 1 22 20 - 54 0 0 3 46 9 3 5 59 56 185 -62 4 26 39 3 5 59 6 40 16 0 57 54 - 53 0 0 3 21 42 3 5 51 57 187 -63 4 2 1 2 41 42 6 15 2 0 34 10 - 52 0 0 2 57 58 3 5 43 57 189 -64 3 38 6 2 18 8 5 50 31 0 11 6 - 51 0 0 2 34 56 3 5 35 57 190 -64 3 14 55 1 55 16 5 26 45 - 0 11 16 - 50 0 0 2 12 37 3 5 27 57 192 -65 2 52 26 1 33 6 5 3 43 - 0 32 56 - 49 0 0 1 51 0 3 5 19 57 193 -65 2 30 40 1 11 39 4 41 25 - 0 53 55 - 48 0 0 1 30 6 3 5 11 58 195 -66 2 9 37 0 50 54 4 19 51 - 1 14 12 - 47 0 0 1 9 55 3 5 3 58 197 -66 1 49 17 0 30 51 3 59 1 - 1 33 48 - 46 0 0 0 50 26 3 4 56 58 198 -67 1 29 40 0 11 31 3 38 55 - 1 52 43 - 45 0 0 0 31 40 3 4 48 58 200 -67 1 10 45 - 0 7 7 3 19 33 - 2 10 57 - 44 0 0 0 13 36 3 4 40 58 202 -67 0 52 34 - 0 25 3 3 0 54 - 2 28 29 - 43 0 0 - 0 3 45 3 4 32 57 203 -68 0 35 5 - 0 42 17 2 43 0 - 2 45 20 - 42 0 0 - 0 20 24 3 4 25 57 205 -68 0 18 19 - 0 58 49 2 25 49 - 3 1 30 - 41 0 0 - 0 36 21 3 4 17 57 206 -68 0 2 15 - 1 14 39 2 9 21 - 3 16 59 - 40 0 0 - 0 51 35 3 4 10 57 208 -68 - 0 13 6 - 1 29 48 1 53 38 - 3 31 47 - 39 0 0 - 1 6 8 3 4 2 57 209 -68 - 0 27 45 - 1 44 14 1 38 37 - 3 45 54 - 38 0 0 - 1 19 58 3 3 55 56 211 -68 - 0 41 42 - 1 57 59 1 24 20 - 3 59 21 - 37 0 0 - 1 33 7 3 3 47 56 212 -68 - 0 54 56 - 2 11 1 1 10 47 - 4 12 6 - 36 0 0 - 1 45 33 3 3 40 56 213 -68 - 1 7 28 - 2 23 23 0 57 57 - 4 24 11 - 35 0 0 - 1 57 18 3 3 32 55 215 -67 - 1 19 18 - 2 35 3 0 45 50 - 4 35 36 - 34 0 0 - 2 8 21 3 3 25 55 216 -67 - 1 30 25 - 2 46 1 0 34 26 - 4 46 20 - 33 0 0 - 2 18 43 3 3 18 55 217 -67 - 1 40 51 - 2 56 18 0 23 45 - 4 56 23 - 32 0 0 - 2 28 22 3 3 10 54 218 -67 - 1 50 35 - 3 5 54 0 13 47 - 5 5 46 - 31 0 0 - 2 37 20 3 3 3 54 219 -66 - 1 59 37 - 3 14 48 0 4 32 - 5 14 29 - 30 0 0 - 2 45 37 3 2 56 53 220 -66 - 2 7 57 - 3 23 1 - 0 4 0 - 5 22 32 - 29 0 0 - 2 53 12 3 2 49 53 221 -65 - 2 15 35 - 3 30 33 - 0 11 49 - 5 29 54 - 28 0 0 - 3 0 6 3 2 42 52 222 -65 - 2 22 32 - 3 37 24 - 0 18 55 - 5 36 36 - 27 0 0 - 3 6 18 3 2 35 51 223 -64 - 2 28 46 - 3 43 34 - 0 25 19 - 5 42 38 - 26 0 0 - 3 11 49 3 2 28 51 224 -64 - 2 34 20 - 3 49 2 - 0 30 59 - 5 47 59 - 25 0 0 - 3 16 38 3 2 22 50 225 -63 - 2 39 11 - 3 53 50 - 0 35 57 - 5 52 41 - 24 0 0 - 3 20 46 3 2 15 49 226 -63 - 2 43 21 - 3 57 56 - 0 40 12 - 5 56 42 - 23 0 0 - 3 24 13 3 2 8 49 227 -62 - 2 46 49 - 4 1 21 - 0 43 45 - 6 0 4 - 22 0 0 - 3 26 58 3 2 2 48 227 -61 - 2 49 35 - 4 4 6 - 0 46 35 - 6 2 45 - 21 0 0 - 3 29 2 3 1 55 47 228 -61 - 2 51 40 - 4 6 9 - 0 48 42 - 6 4 46 - 20 0 0 - 3 30 25 3 1 49 47 229 -60 - 2 53 3 - 4 7 31 - 0 50 6 - 6 6 7 - 19 0 0 - 3 31 6 3 1 42 46 229 -59 - 2 53 44 - 4 8 12 - 0 50 47 - 6 6 48 - 18 0 0 - 3 31 6 3 1 36 45 230 -58 - 2 53 43 - 4 8 12 - 0 50 46 - 6 6 48 - 17 0 0 - 3 30 24 3 1 30 45 230 -58 - 2 53 1 - 4 7 31 - 0 50 2 - 6 6 9 - 16 0 0 - 3 29 0 3 1 24 44 231 -57 - 2 51 37 - 4 6 9 - 0 48 35 - 6 4 49 - 15 0 0 - 3 26 56 3 1 18 43 231 -56 - 2 49 31 - 4 4 5 - 0 46 25 - 6 2 49 - 14 0 0 - 3 24 9 3 1 12 42 232 -55 - 2 46 43 - 4 1 20 - 0 43 31 - 6 0 8 - 13 0 0 - 3 20 41 3 1 6 41 232 -54 - 2 43 13 - 3 57 53 - 0 39 55 - 5 56 47 - 12 0 0 - 3 16 31 3 1 0 41 233 -54 - 2 39 0 - 3 53 45 - 0 35 36 - 5 52 46 - 11 0 0 - 3 11 39 3 0 54 40 233 -53 - 2 34 6 - 3 48 56 - 0 30 33 - 5 48 4 - 10 0 0 - 3 6 5 3 0 49 39 234 -52 - 2 28 29 - 3 43 24 - 0 24 46 - 5 42 41 - 9 0 0 - 2 59 49 3 0 43 38 234 -51 - 2 22 10 - 3 37 11 - 0 18 17 - 5 36 37 - 8 0 0 - 2 52 50 3 0 38 37 234 -50 - 2 15 8 - 3 30 16 - 0 11 3 - 5 29 52 - 7 0 0 - 2 45 10 3 0 32 36 235 -49 - 2 7 24 - 3 22 39 - 0 3 6 - 5 22 27 - 6 0 0 - 2 36 46 3 0 27 35 235 -48 - 1 58 57 - 3 14 20 0 5 35 - 5 14 20 - 5 0 0 - 2 27 41 3 0 22 35 235 -47 - 1 49 46 - 3 5 19 0 15 0 - 5 5 32 - 4 0 0 - 2 17 52 3 0 17 34 235 -46 - 1 39 53 - 2 55 35 0 25 10 - 4 56 2 - 3 0 0 - 2 7 21 3 0 12 33 236 -46 - 1 29 17 - 2 45 9 0 36 3 - 4 45 51 - 2 0 0 - 1 56 7 3 0 7 32 236 -45 - 1 17 57 - 2 34 0 0 47 41 - 4 34 59 - 1 0 0 - 1 44 9 3 0 3 31 236 -44 - 1 5 54 - 2 22 8 1 0 4 - 4 23 24 0 0 0 - 1 31 28 2 59 58 30 236 -43 - 0 53 7 - 2 9 33 1 13 12 - 4 11 8 1 0 0 - 1 18 4 2 59 54 29 236 -42 - 0 39 36 - 1 56 15 1 27 5 - 3 58 9 2 0 0 - 1 3 56 2 59 49 28 236 -41 - 0 25 21 - 1 42 13 1 41 42 - 3 44 28 3 0 0 - 0 49 4 2 59 45 27 237 -40 - 0 10 22 - 1 27 28 1 57 5 - 3 30 4 4 0 0 - 0 33 28 2 59 41 26 237 -39 0 5 21 - 1 12 0 2 13 14 - 3 14 58 5 0 0 - 0 17 8 2 59 37 25 237 -38 0 21 49 - 0 55 47 2 30 8 - 2 59 9 6 0 0 - 0 0 4 2 59 33 24 237 -37 0 39 1 - 0 38 51 2 47 49 - 2 42 37 7 0 0 0 17 45 2 59 29 23 237 -36 0 56 58 - 0 21 10 3 6 15 - 2 25 22 8 0 0 0 36 19 2 59 26 22 237 -35 1 15 41 - 0 2 45 3 25 27 - 2 7 24 9 0 0 0 55 37 2 59 22 21 237 -34 1 35 8 0 16 24 3 45 26 - 1 48 42 10 0 0 1 15 40 2 59 19 20 238 -33 1 55 21 0 36 18 4 6 11 - 1 29 17 11 0 0 1 36 29 2 59 16 19 238 -32 2 16 19 0 56 57 4 27 43 - 1 9 8 12 0 0 1 58 2 2 59 13 18 238 -31 2 38 3 1 18 20 4 50 2 - 0 48 15 13 0 0 2 20 21 2 59 10 17 238 -30 3 0 33 1 40 29 5 13 8 - 0 26 38 14 0 0 2 43 26 2 59 7 16 238 -29 3 23 48 2 3 23 5 37 0 - 0 4 17 15 0 0 3 7 16 2 59 4 15 238 -27 3 47 49 2 27 2 6 1 40 0 18 49 16 0 0 3 31 52 2 59 2 14 238 -26 4 12 37 2 51 27 6 27 7 0 42 39 17 0 0 3 57 13 2 59 0 13 238 -25 4 38 10 3 16 37 6 53 22 1 7 13 18 0 0 4 23 21 2 58 57 12 238 -24 5 4 30 3 42 32 7 20 24 1 32 31 19 0 0 4 50 14 2 58 56 11 239 -23 5 31 36 4 9 13 7 48 13 1 58 35 20 0 0 5 17 53 2 58 54 10 239 -22 5 59 28 4 36 40 8 16 50 2 25 22 21 0 0 5 46 18 2 58 52 9 239 -21 6 28 7 5 4 52 8 46 14 2 52 55 22 0 0 6 15 29 2 58 51 8 239 -20 6 57 31 5 33 50 9 16 25 3 21 12 23 0 0 6 45 26 2 58 50 6 239 -19 7 27 42 6 3 33 9 47 23 .. .. .. 24 0 0 7 16 8 2 58 49 5 239 -18 7 58 38 6 34 1 10 19 9 .. .. .. 25 0 0 7 47 36 2 58 48 4 239 -17 8 30 21 7 5 15 10 51 42 .. .. .. 26 0 0 8 19 49 2 58 47 3 239 -15 9 2 49 7 37 13 11 25 1 .. .. .. 27 0 0 8 52 47 2 58 47 2 240 -14 9 36 2 8 9 57 11 59 7 .. .. .. 28 0 0 9 26 30 2 58 46 1 240 -13 10 10 0 8 43 25 .. .. .. .. .. .. Uncertainty in time = +/- 13 secs [Prediction of 2008 Jun 6.0] Data for the target star ------------------------ * name: 2UCAC 19504141 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 21 34.5130 DE: -29 42 16.733 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .104, .108 ) * V mag [mag]: 12.5 * B mag [mag]: 0.0 * Apparent position with proper motion RA(deg): 275.5399522869 DE(deg): -29.7017756752 * Equation of equinoxes (radians) : 0.000051639804861 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (466) Tisiphone approx. diameter [km]: 116 approx. diameter ["]: .067 distance from Earth [AU]: 2.38800 * orbital information: orbit source: Preston date of fit: 2008 Jun 04 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 772 number of rejected observations: 76 time covered by the observations: 1901 Jan 19 - 2008 May 21 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.014, 70° remarks: * orbital elements for (466) Tisiphone : Mean anomaly = 89.29531574 deg Arg. of pericenter = 247.39267627 deg Long. of node = 291.16742444 deg Inclination = 19.17206973 deg Eccentricity = 0.08378002 Semimajor axis = 3.36644052 AU Perihelion dist = 3.08440008 AU Mag: H = 8.39, G = 0.15 Epoch of elements : MJD 54655.12800000 TDT (2008 Jul 08.128) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 8 466 Tisiphone 3h 4.9m UT 12.5 18 21 34.513-29 42 16.732UCAC 19504141 0.0 13.2 116 7.9 2.388 -2.168 10.87 -57.2874 -29.707 135.04 22.44 3.0823 0.19194 0.49923 -7.67353 2.95057 0.00114 0.00066 2000 88.4770482008 7 3.00000247.392676291.167424 19.1720700.08378002 3.3664405 3.0844001 8.3 5.00.15 RATE 1.5956870 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.109 0.106 360 2.62 0.108 0 54623.5020080708_504141 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jun 06, 21:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org