IOTA/IOTA-ES occultation update for (33) Polyhymnia / TYC 5548-00066-1 event on 2008 Mar 31, 07:42 UT Visible from Caribbean, USA Summary ------- On 2008 Mar 31 UT, the 65 km diameter asteroid (33) Polyhymnia will occult a 11.9 mag star in the constellation Virgo for observers along a path across Caribbean, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.9 mag to 13.6 mag (the magnitude of the asteroid) for at most 4.3 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: 62 * date and approx. time of event: 2008 Mar 31, 07:37 - 2008 Mar 31, 07:48 UT * magnitude of target star: 11.9 * magnitude drop [mag]: 1.9 * estimated maximum duration [s]: 4.3 * Moon: 36 % sunlit, 92° distance * Sun: 166° distance * rough path description: Caribbean, USA The occultation path -------------------- * approximate projected width [km]: 85 * 1 sigma uncertainty interval [path widths]: +/- 0.98 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .032", 7° ) * approx speed of asteroid's shadow [km/s]: 15.0680 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5548-00066-1 by 33 Polyhymnia on 2008 Mar 31 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 -175 0 0 57 59 19 7 48 0 0 110 -12 58 23 53 57 34 54 59 12 30 .. .. .. -174 0 0 57 47 29 7 48 0 1 111 -13 58 12 7 57 23 1 59 0 51 .. .. .. -173 0 0 57 35 22 7 48 0 2 112 -13 58 0 3 57 10 50 58 48 55 .. .. .. -172 0 0 57 22 57 7 48 0 2 113 -14 57 47 42 56 58 21 58 36 41 .. .. .. -171 0 0 57 10 13 7 47 59 3 114 -14 57 35 2 56 45 34 58 24 9 .. .. .. -170 0 0 56 57 12 7 47 59 3 115 -15 57 22 5 56 32 30 58 11 19 55 44 30 -169 0 0 56 43 53 7 47 59 4 115 -15 57 8 49 56 19 7 57 58 11 55 31 0 -168 0 0 56 30 16 7 47 58 5 116 -16 56 55 15 56 5 26 57 44 44 55 17 13 -167 0 0 56 16 20 7 47 58 5 117 -17 56 41 24 55 51 26 57 31 0 55 3 6 -166 0 0 56 2 6 7 47 57 6 118 -17 56 27 13 55 37 9 57 16 57 54 48 42 -165 0 0 55 47 34 7 47 57 6 119 -18 56 12 45 55 22 33 57 2 36 54 34 0 -164 0 0 55 32 44 7 47 56 7 120 -18 55 57 58 55 7 40 56 47 57 54 18 59 -163 0 0 55 17 35 7 47 55 8 120 -19 55 42 53 54 52 27 56 32 59 54 3 40 -162 0 0 55 2 8 7 47 54 8 121 -20 55 27 30 54 36 57 56 17 43 53 48 3 -161 0 0 54 46 23 7 47 53 9 122 -20 55 11 48 54 21 8 56 2 9 53 32 8 -160 0 0 54 30 20 7 47 53 9 123 -21 54 55 48 54 5 2 55 46 16 53 15 55 -159 0 0 54 13 58 7 47 51 10 124 -21 54 39 30 53 48 37 55 30 4 52 59 23 -158 0 0 53 57 18 7 47 50 11 125 -22 54 22 54 53 31 53 55 13 35 52 42 34 -157 0 0 53 40 20 7 47 49 11 125 -23 54 5 59 53 14 52 54 56 47 52 25 27 -156 0 0 53 23 4 7 47 48 12 126 -23 53 48 46 52 57 33 54 39 41 52 8 1 -155 0 0 53 5 31 7 47 46 13 127 -24 53 31 16 52 39 56 54 22 16 51 50 19 -154 0 0 52 47 39 7 47 45 13 128 -25 53 13 27 52 22 1 54 4 34 51 32 18 -153 0 0 52 29 29 7 47 44 14 129 -25 52 55 21 52 3 49 53 46 34 51 14 0 -152 0 0 52 11 2 7 47 42 15 129 -26 52 36 56 51 45 19 53 28 15 50 55 25 -151 0 0 51 52 18 7 47 40 15 130 -26 52 18 15 51 26 32 53 9 39 50 36 32 -150 0 0 51 33 16 7 47 38 16 131 -27 51 59 16 51 7 27 52 50 46 50 17 22 -149 0 0 51 13 57 7 47 36 17 132 -28 51 39 59 50 48 6 52 31 35 49 57 56 -148 0 0 50 54 21 7 47 35 17 133 -28 51 20 26 50 28 27 52 12 7 49 38 13 -147 0 0 50 34 29 7 47 32 18 134 -29 51 0 36 50 8 33 51 52 22 49 18 14 -146 0 0 50 14 20 7 47 30 19 134 -30 50 40 29 49 48 22 51 32 20 48 57 59 -145 0 0 49 53 55 7 47 28 19 135 -30 50 20 7 49 27 54 51 12 1 48 37 27 -144 0 0 49 33 14 7 47 26 20 136 -31 49 59 28 49 7 11 50 51 26 48 16 41 -143 0 0 49 12 17 7 47 23 21 137 -32 49 38 33 48 46 13 50 30 36 47 55 39 -142 0 0 48 51 6 7 47 21 22 138 -32 49 17 23 48 25 0 50 9 29 47 34 22 -141 0 0 48 29 39 7 47 18 22 139 -33 48 55 58 48 3 31 49 48 8 47 12 51 -140 0 0 48 7 58 7 47 15 23 139 -34 48 34 18 47 41 49 49 26 31 46 51 5 -139 0 0 47 46 2 7 47 12 24 140 -34 48 12 24 47 19 52 49 4 39 46 29 6 -138 0 0 47 23 53 7 47 9 24 141 -35 47 50 16 46 57 41 48 42 34 46 6 53 -137 0 0 47 1 30 7 47 6 25 142 -35 47 27 54 46 35 17 48 20 14 45 44 27 -136 0 0 46 38 54 7 47 3 26 143 -36 47 5 20 46 12 41 47 57 42 45 21 49 -135 0 0 46 16 6 7 47 0 26 144 -37 46 42 32 45 49 52 47 34 56 44 58 59 -134 0 0 45 53 6 7 46 56 27 145 -37 46 19 33 45 26 51 47 11 57 44 35 57 -133 0 0 45 29 54 7 46 53 28 146 -38 45 56 21 45 3 39 46 48 47 44 12 44 -132 0 0 45 6 32 7 46 49 29 146 -39 45 32 59 44 40 16 46 25 25 43 49 20 -131 0 0 44 42 58 7 46 45 29 147 -39 45 9 26 44 16 42 46 1 52 43 25 46 -130 0 0 44 19 15 7 46 42 30 148 -40 44 45 42 43 52 59 45 38 9 43 2 3 -129 0 0 43 55 22 7 46 38 31 149 -40 44 21 50 43 29 7 45 14 16 42 38 11 -128 0 0 43 31 21 7 46 34 31 150 -41 43 57 48 43 5 5 44 50 13 42 14 10 -127 0 0 43 7 11 7 46 29 32 151 -42 43 33 37 42 40 56 44 26 2 41 50 1 -126 0 0 42 42 53 7 46 25 33 152 -42 43 9 19 42 16 39 44 1 43 41 25 45 -125 0 0 42 18 28 7 46 21 34 153 -43 42 44 54 41 52 15 43 37 16 41 1 23 -124 0 0 41 53 57 7 46 16 34 154 -43 42 20 22 41 27 45 43 12 42 40 36 54 -123 0 0 41 29 20 7 46 12 35 155 -44 41 55 44 41 3 9 42 48 2 40 12 20 -122 0 0 41 4 38 7 46 7 36 156 -44 41 31 0 40 38 28 42 23 16 39 47 42 -121 0 0 40 39 52 7 46 2 36 157 -45 41 6 12 40 13 42 41 58 26 39 22 59 -120 0 0 40 15 1 7 45 57 37 158 -45 40 41 20 39 48 53 41 33 31 38 58 12 -119 0 0 39 50 7 7 45 52 38 159 -46 40 16 25 39 24 1 41 8 32 38 33 23 -118 0 0 39 25 11 7 45 47 38 160 -46 39 51 27 38 59 6 40 43 31 38 8 32 -117 0 0 39 0 13 7 45 42 39 161 -47 39 26 27 38 34 10 40 18 27 37 43 39 -116 0 0 38 35 14 7 45 37 40 162 -47 39 1 26 38 9 13 39 53 22 37 18 45 -115 0 0 38 10 14 7 45 31 40 163 -48 38 36 24 37 44 15 39 28 16 36 53 52 -114 0 0 37 45 15 7 45 26 41 164 -48 38 11 22 37 19 18 39 3 10 36 28 58 -113 0 0 37 20 16 7 45 20 41 166 -48 37 46 22 36 54 22 38 38 4 36 4 6 -112 0 0 36 55 19 7 45 15 42 167 -49 37 21 22 36 29 27 38 13 0 35 39 16 -111 0 0 36 30 24 7 45 9 43 168 -49 36 56 25 36 4 35 37 47 57 35 14 29 -110 0 0 36 5 33 7 45 3 43 169 -49 36 31 31 35 39 46 37 22 58 34 49 44 -109 0 0 35 40 45 7 44 57 44 170 -50 36 6 40 35 15 0 36 58 2 34 25 4 -108 0 0 35 16 1 7 44 51 44 172 -50 35 41 54 34 50 19 36 33 10 34 0 28 -107 0 0 34 51 22 7 44 45 45 173 -50 35 17 12 34 25 44 36 8 22 33 35 58 -106 0 0 34 26 50 7 44 39 45 174 -50 34 52 36 34 1 14 35 43 40 33 11 33 -105 0 0 34 2 23 7 44 33 46 176 -51 34 28 7 33 36 50 35 19 5 32 47 16 -104 0 0 33 38 4 7 44 26 46 177 -51 34 3 44 33 12 34 34 54 36 32 23 5 -103 0 0 33 13 52 7 44 20 47 178 -51 33 39 30 32 48 25 34 30 15 31 59 2 -102 0 0 32 49 49 7 44 14 47 180 -51 33 15 23 32 24 25 34 6 2 31 35 8 -101 0 0 32 25 55 7 44 7 47 181 -51 32 51 26 32 0 34 33 41 58 31 11 23 -100 0 0 32 2 10 7 44 1 48 183 -51 32 27 38 31 36 53 33 18 3 30 47 48 - 99 0 0 31 38 36 7 43 54 48 184 -51 32 4 0 31 13 22 32 54 19 30 24 23 - 98 0 0 31 15 13 7 43 48 48 186 -51 31 40 33 30 50 2 32 30 45 30 1 10 - 97 0 0 30 52 1 7 43 41 49 187 -51 31 17 18 30 26 53 32 7 23 29 38 8 - 96 0 0 30 29 1 7 43 34 49 189 -51 30 54 15 30 3 57 31 44 13 29 15 18 - 95 0 0 30 6 14 7 43 28 49 190 -51 30 31 25 29 41 13 31 21 16 28 52 40 - 94 0 0 29 43 40 7 43 21 49 192 -51 30 8 47 29 18 43 30 58 32 28 30 17 - 93 0 0 29 21 21 7 43 14 50 193 -50 29 46 24 28 56 27 30 36 1 28 8 7 - 92 0 0 28 59 15 7 43 7 50 195 -50 29 24 15 28 34 25 30 13 45 27 46 11 - 91 0 0 28 37 25 7 43 1 50 196 -50 29 2 21 28 12 38 29 51 44 27 24 31 - 90 0 0 28 15 50 7 42 54 50 198 -50 28 40 43 27 51 6 29 29 58 27 3 6 - 89 0 0 27 54 31 7 42 47 50 199 -49 28 19 20 27 29 51 29 8 29 26 41 57 - 88 0 0 27 33 28 7 42 40 50 201 -49 27 58 14 27 8 51 28 47 16 26 21 4 - 87 0 0 27 12 42 7 42 33 50 202 -49 27 37 25 26 48 9 28 26 20 26 0 29 - 86 0 0 26 52 14 7 42 26 50 204 -48 27 16 54 26 27 45 28 5 41 25 40 10 - 85 0 0 26 32 4 7 42 19 50 206 -48 26 56 40 26 7 38 27 45 21 25 20 10 - 84 0 0 26 12 12 7 42 13 50 207 -48 26 36 45 25 47 49 27 25 18 25 0 28 - 83 0 0 25 52 40 7 42 6 50 209 -47 26 17 8 25 28 20 27 5 35 24 41 5 - 82 0 0 25 33 26 7 41 59 50 210 -47 25 57 51 25 9 9 26 46 11 24 22 1 - 81 0 0 25 14 32 7 41 52 49 212 -46 25 38 54 24 50 19 26 27 7 24 3 16 - 80 0 0 24 55 58 7 41 45 49 213 -46 25 20 17 24 31 48 26 8 24 23 44 51 - 79 0 0 24 37 44 7 41 38 49 215 -45 25 2 0 24 13 38 25 50 0 23 26 47 - 78 0 0 24 19 52 7 41 32 49 216 -45 24 44 4 23 55 48 25 31 58 23 9 4 - 77 0 0 24 2 20 7 41 25 48 217 -44 24 26 30 23 38 20 25 14 17 22 51 41 - 76 0 0 23 45 11 7 41 18 48 219 -43 24 9 17 23 21 13 24 56 58 22 34 40 - 75 0 0 23 28 23 7 41 12 48 220 -43 23 52 26 23 4 28 24 40 1 22 18 1 - 74 0 0 23 11 57 7 41 5 47 221 -42 23 35 57 22 48 6 24 23 26 22 1 44 - 73 0 0 22 55 54 7 40 58 47 223 -41 23 19 51 22 32 5 24 7 14 21 45 49 - 72 0 0 22 40 14 7 40 52 47 224 -41 23 4 8 22 16 28 23 51 25 21 30 17 - 71 0 0 22 24 57 7 40 45 46 225 -40 22 48 48 22 1 14 23 35 59 21 15 8 - 70 0 0 22 10 3 7 40 39 46 226 -39 22 33 52 21 46 23 23 20 58 21 0 23 - 69 0 0 21 55 33 7 40 32 45 228 -39 22 19 19 21 31 56 23 6 20 20 46 1 - 68 0 0 21 41 27 7 40 26 45 229 -38 22 5 11 21 17 52 22 52 6 20 32 2 - 67 0 0 21 27 46 7 40 20 44 230 -37 21 51 27 21 4 13 22 38 17 20 18 28 - 66 0 0 21 14 29 7 40 13 44 231 -36 21 38 7 20 50 59 22 24 52 20 5 18 - 65 0 0 21 1 37 7 40 7 43 232 -36 21 25 13 20 38 9 22 11 53 19 52 33 - 64 0 0 20 49 9 7 40 1 42 233 -35 21 12 43 20 25 44 21 59 19 19 40 12 - 63 0 0 20 37 7 7 39 55 42 234 -34 21 0 39 20 13 44 21 47 10 19 28 17 - 62 0 0 20 25 31 7 39 49 41 235 -33 20 49 0 20 2 10 21 35 27 19 16 46 - 61 0 0 20 14 20 7 39 43 40 236 -33 20 37 47 19 51 1 21 24 9 19 5 41 - 60 0 0 20 3 35 7 39 38 40 237 -32 20 27 0 19 40 18 21 13 18 18 55 2 - 59 0 0 19 53 16 7 39 32 39 237 -31 20 16 39 19 30 1 21 2 53 18 44 49 - 58 0 0 19 43 23 7 39 26 38 238 -30 20 6 44 19 20 10 20 52 55 18 35 1 - 57 0 0 19 33 56 7 39 21 38 239 -29 19 57 16 19 10 45 20 43 23 18 25 39 - 56 0 0 19 24 57 7 39 15 37 240 -28 19 48 15 19 1 47 20 34 18 18 16 44 - 55 0 0 19 16 23 7 39 10 36 241 -28 19 39 40 18 53 15 20 25 40 18 8 16 - 54 0 0 19 8 17 7 39 5 36 241 -27 19 31 32 18 45 10 20 17 29 18 0 14 - 53 0 0 19 0 38 7 38 59 35 242 -26 19 23 51 18 37 32 20 9 46 17 52 38 - 52 0 0 18 53 25 7 38 54 34 243 -25 19 16 38 18 30 21 20 2 30 17 45 30 - 51 0 0 18 46 41 7 38 49 33 243 -24 19 9 52 18 23 37 19 55 41 17 38 48 - 50 0 0 18 40 23 7 38 44 32 244 -23 19 3 33 18 17 21 19 49 20 17 32 34 - 49 0 0 18 34 33 7 38 40 32 245 -22 18 57 42 18 11 32 19 43 27 17 26 47 - 48 0 0 18 29 11 7 38 35 31 245 -22 18 52 19 18 6 11 19 38 2 17 21 27 - 47 0 0 18 24 16 7 38 30 30 246 -21 18 47 23 18 1 17 19 33 5 17 16 35 - 46 0 0 18 19 49 7 38 26 29 246 -20 18 42 56 17 56 51 19 28 36 17 12 11 - 45 0 0 18 15 51 7 38 22 28 247 -19 18 38 56 17 52 53 19 24 35 17 8 14 - 44 0 0 18 12 20 7 38 17 28 247 -18 18 35 25 17 49 23 19 21 3 17 4 45 - 43 0 0 18 9 17 7 38 13 27 248 -17 18 32 22 17 46 20 19 17 59 17 1 43 - 42 0 0 18 6 43 7 38 9 26 248 -16 18 29 47 17 43 46 19 15 24 16 59 10 - 41 0 0 18 4 37 7 38 5 25 249 -15 18 27 41 17 41 40 19 13 17 16 57 4 - 40 0 0 18 2 59 7 38 2 24 249 -14 18 26 3 17 40 3 19 11 39 16 55 27 - 39 0 0 18 1 50 7 37 58 23 250 -13 18 24 54 17 38 54 19 10 29 16 54 18 - 38 0 0 18 1 9 7 37 55 22 250 -12 18 24 13 17 38 13 19 9 48 16 53 37 - 37 0 0 18 0 57 7 37 51 21 251 -11 18 24 1 17 38 0 19 9 37 16 53 24 - 36 0 0 18 1 13 7 37 48 21 251 -11 18 24 17 17 38 16 19 9 54 16 53 40 - 35 0 0 18 1 58 7 37 45 20 252 -10 18 25 3 17 39 1 19 10 40 16 54 24 - 34 0 0 18 3 11 7 37 42 19 252 -9 18 26 17 17 40 14 19 11 54 16 55 36 - 33 0 0 18 4 54 7 37 39 18 252 -8 18 27 59 17 41 56 19 13 38 16 57 17 - 32 0 0 18 7 5 7 37 36 17 253 -7 18 30 11 17 44 6 19 15 51 16 59 26 - 31 0 0 18 9 45 7 37 34 16 253 -6 18 32 52 17 46 45 19 18 33 17 2 4 - 30 0 0 18 12 53 7 37 31 15 254 -5 18 36 1 17 49 53 19 21 45 17 5 10 - 29 0 0 18 16 30 7 37 29 14 254 -4 18 39 39 17 53 29 19 25 25 17 8 44 - 28 0 0 18 20 36 7 37 27 13 254 -3 18 43 46 17 57 34 19 29 34 17 12 47 - 27 0 0 18 25 11 7 37 25 12 255 -2 18 48 22 18 2 8 19 34 12 17 17 19 - 26 0 0 18 30 15 7 37 23 11 255 -1 18 53 27 18 7 10 19 39 20 17 22 19 - 25 0 0 18 35 47 7 37 21 11 255 0 18 59 1 18 12 41 19 44 56 17 27 47 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 28.0] Data for the target star ------------------------ * name: TYC 5548-00066-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 32 38.0853 DE: -10 17 02.817 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .029 ) * V mag [mag]: 11.9 * B mag [mag]: 12.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (33) Polyhymnia approx. diameter [km]: 65 approx. diameter ["]: .035 distance from Earth [AU]: 2.54200 * orbital information: orbit source: Preston date of fit: 2008 Mar 27 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 917 number of rejected observations: 112 time covered by the observations: 1904 Jan 11 - 2008 Jan 26 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.019, 112° remarks: * orbital elements for (33) Polyhymnia : Mean anomaly = 241.76293403 deg Arg. of pericenter = 338.22615852 deg Long. of node = 8.58459940 deg Inclination = 1.87103153 deg Eccentricity = 0.33813103 Semimajor axis = 2.86413193 AU Perihelion dist = 1.89568005 AU Mag: H = 8.54, G = 0.33 Epoch of elements : MJD 54556.32100000 TDT (2008 Mar 31.321) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 31 33 Polyhymnia 7h 42.6m UT 11.9 13 32 38.085-10 17 2.82TYC 5548-00066-1 12.2 13.6 65 4.3 2.542 -1.879 9.84 -101.5492 -10.286 65.38 4.34 7.7101 0.21456 0.60423 -8.01583 2.84226 -0.00137 0.00060 2000 240.4776462008 325.00000338.226159 8.584599 1.8710320.33813103 2.8641319 1.8956801 8.6 5.00.33 RATE 2.0333620 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.032 7 1.98 0.035 0 54553.5020080331_0066-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 28, 06:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org