IOTA/IOTA-ES occultation update for (67) Asia / TYC 5767-01721-1 event on 2012 Oct 31, 10:04 UT Visible from Japan, China Summary ------- On 2012 Oct 31 UT, the 62 km diameter asteroid (67) Asia will occult a 12.0 mag star in the constellation Capricornus for observers along a path across Japan, China. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.9 mag to 12.3 mag (the magnitude of the asteroid) for at most 2.9 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: 82 * date and approx. time of event: 2012 Oct 31, 10:03 - 2012 Oct 31, 10:07 UT * geocentric midpoint of event [JD]: 2456231.919675 * magnitude of target star: 12.0 * magnitude drop [mag]: 0.9 * estimated maximum duration [s]: 2.9 * Moon: 98 % sunlit, 107° distance * Sun: 90° distance * rough path description: Japan, China The occultation path -------------------- * approximate projected width [km]: 89 * 1 sigma uncertainty interval [path widths]: +/- 0.65 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .029", 360° ) * approx speed of asteroid's shadow [km/s]: 21.1672 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5767-01721-1 by 67 Asia on 2012 Oct 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 107 0 0 31 38 30 10 3 50 44 164 -1 31 14 26 32 2 44 30 43 25 32 34 31 108 0 0 31 42 34 10 3 54 44 166 -2 31 18 30 32 6 49 30 47 27 32 38 36 109 0 0 31 46 58 10 3 59 44 167 -3 31 22 52 32 11 13 30 51 49 32 43 1 110 0 0 31 51 41 10 4 4 44 168 -3 31 27 35 32 15 57 30 56 30 32 47 46 111 0 0 31 56 43 10 4 8 44 170 -4 31 32 36 32 21 0 31 1 31 32 52 51 112 0 0 32 2 5 10 4 13 44 171 -5 31 37 57 32 26 23 31 6 51 32 58 15 113 0 0 32 7 46 10 4 17 44 173 -6 31 43 37 32 32 5 31 12 29 33 3 58 114 0 0 32 13 46 10 4 22 44 174 -7 31 49 36 32 38 6 31 18 27 33 10 1 115 0 0 32 20 5 10 4 26 44 175 -8 31 55 54 32 44 26 31 24 44 33 16 22 116 0 0 32 26 43 10 4 31 44 177 -9 32 2 31 32 51 5 31 31 19 33 23 2 117 0 0 32 33 39 10 4 36 44 178 -9 32 9 26 32 58 2 31 38 13 33 30 1 118 0 0 32 40 54 10 4 40 44 180 -10 32 16 40 33 5 18 31 45 25 33 37 19 119 0 0 32 48 27 10 4 45 44 181 -11 32 24 11 33 12 52 31 52 55 33 44 55 120 0 0 32 56 18 10 4 49 44 182 -12 32 32 1 33 20 45 32 0 43 33 52 49 121 0 0 33 4 26 10 4 54 44 184 -13 32 40 9 33 28 55 32 8 49 34 1 1 122 0 0 33 12 53 10 4 58 43 185 -14 32 48 34 33 37 23 32 17 13 34 9 30 123 0 0 33 21 37 10 5 3 43 186 -15 32 57 16 33 46 8 32 25 53 34 18 18 124 0 0 33 30 38 10 5 7 43 188 -16 33 6 16 33 55 11 32 34 52 34 27 22 125 0 0 33 39 56 10 5 11 43 189 -16 33 15 33 34 4 31 32 44 7 34 36 44 126 0 0 33 49 31 10 5 16 42 190 -17 33 25 7 34 14 7 32 53 38 34 46 22 127 0 0 33 59 23 10 5 20 42 192 -18 33 34 57 34 24 0 33 3 26 34 56 17 128 0 0 34 9 31 10 5 24 42 193 -19 33 45 3 34 34 10 33 13 31 35 6 29 129 0 0 34 19 55 10 5 29 41 194 -20 33 55 25 34 44 35 33 23 51 35 16 56 130 0 0 34 30 34 10 5 33 41 195 -21 34 6 3 34 55 16 33 34 27 35 27 40 131 0 0 34 41 29 10 5 37 40 197 -21 34 16 57 35 6 13 33 45 18 35 38 38 132 0 0 34 52 39 10 5 41 40 198 -22 34 28 5 35 17 25 33 56 25 35 49 52 133 0 0 35 4 4 10 5 46 40 199 -23 34 39 29 35 28 51 34 7 46 36 1 21 134 0 0 35 15 44 10 5 50 39 200 -24 34 51 7 35 40 33 34 19 22 36 13 5 135 0 0 35 27 38 10 5 54 39 201 -25 35 2 59 35 52 28 34 31 12 36 25 3 136 0 0 35 39 46 10 5 58 38 203 -26 35 15 5 36 4 38 34 43 16 36 37 15 137 0 0 35 52 7 10 6 2 38 204 -26 35 27 25 36 17 1 34 55 34 36 49 40 138 0 0 36 4 42 10 6 5 37 205 -27 35 39 58 36 29 38 35 8 5 37 2 19 139 0 0 36 17 30 10 6 9 37 206 -28 35 52 44 36 42 27 35 20 49 37 15 11 140 0 0 36 30 30 10 6 13 36 207 -29 36 5 43 36 55 29 35 33 46 37 28 15 141 0 0 36 43 43 10 6 17 35 208 -30 36 18 54 37 8 44 35 46 54 37 41 32 142 0 0 36 57 8 10 6 20 35 209 -31 36 32 17 37 22 10 36 0 15 37 55 1 143 0 0 37 10 44 10 6 24 34 210 -31 36 45 51 37 35 48 36 13 47 38 8 41 144 0 0 37 24 31 10 6 28 34 211 -32 36 59 37 37 49 37 36 27 31 38 22 32 145 0 0 37 38 29 10 6 31 33 212 -33 37 13 33 38 3 37 36 41 25 38 36 34 146 0 0 37 52 38 10 6 34 32 213 -34 37 27 40 38 17 47 36 55 30 38 50 47 147 0 0 38 6 56 10 6 38 32 214 -34 37 41 57 38 32 7 37 9 45 39 5 10 148 0 0 38 21 24 10 6 41 31 215 -35 37 56 23 38 46 37 37 24 9 39 19 42 149 0 0 38 36 2 10 6 44 30 216 -36 38 10 59 39 1 16 37 38 43 39 34 23 150 0 0 38 50 48 10 6 47 30 217 -37 38 25 44 39 16 4 37 53 25 39 49 13 151 0 0 39 5 43 10 6 50 29 218 -37 38 40 37 39 31 0 38 8 16 40 4 12 152 0 0 39 20 46 10 6 53 28 219 -38 38 55 38 39 46 5 38 23 16 40 19 18 153 0 0 39 35 56 10 6 56 28 219 -39 39 10 47 40 1 17 38 38 23 40 34 33 154 0 0 39 51 14 10 6 59 27 220 -39 39 26 3 40 16 36 38 53 37 40 49 54 155 0 0 40 6 38 10 7 2 26 221 -40 39 41 26 40 32 2 39 8 58 41 5 22 156 0 0 40 22 9 10 7 5 26 222 -41 39 56 55 40 47 34 39 24 25 41 20 56 157 0 0 40 37 46 10 7 7 25 223 -41 40 12 31 41 3 13 39 39 59 41 36 36 158 0 0 40 53 28 10 7 10 24 224 -42 40 28 12 41 18 57 39 55 38 41 52 22 159 0 0 41 9 16 10 7 12 24 225 -43 40 43 58 41 34 45 40 11 23 42 8 13 160 0 0 41 25 8 10 7 15 23 225 -43 40 59 49 41 50 39 40 27 12 42 24 8 161 0 0 41 41 4 10 7 17 22 226 -44 41 15 44 42 6 37 40 43 5 42 40 8 162 0 0 41 57 5 10 7 19 21 227 -44 41 31 43 42 22 38 40 59 3 42 56 11 163 0 0 42 13 8 10 7 21 21 228 -45 41 47 46 42 38 43 41 15 4 43 12 18 164 0 0 42 29 15 10 7 23 20 229 -46 42 3 51 42 54 51 41 31 8 43 28 27 165 0 0 42 45 24 10 7 25 19 229 -46 42 20 0 43 11 2 41 47 15 43 44 39 166 0 0 43 1 36 10 7 27 18 230 -47 42 36 10 43 27 14 42 3 24 44 0 53 167 0 0 43 17 49 10 7 29 18 231 -47 42 52 22 43 43 29 42 19 35 44 17 9 168 0 0 43 34 4 10 7 31 17 232 -48 43 8 36 43 59 44 42 35 48 44 33 26 169 0 0 43 50 20 10 7 32 16 232 -48 43 24 51 44 16 1 42 52 1 44 49 44 170 0 0 44 6 36 10 7 34 15 233 -48 43 41 6 44 32 18 43 8 16 45 6 2 171 0 0 44 22 52 10 7 36 15 234 -49 43 57 22 44 48 35 43 24 30 45 22 20 172 0 0 44 39 8 10 7 37 14 235 -49 44 13 37 45 4 52 43 40 44 45 38 38 173 0 0 44 55 23 10 7 38 13 235 -50 44 29 51 45 21 7 43 56 58 45 54 54 174 0 0 45 11 37 10 7 40 12 236 -50 44 46 5 45 37 22 44 13 11 46 11 10 175 0 0 45 27 50 10 7 41 12 237 -50 45 2 17 45 53 36 44 29 23 46 27 24 176 0 0 45 44 1 10 7 42 11 238 -51 45 18 28 46 9 47 44 45 32 46 43 36 177 0 0 46 0 10 10 7 43 10 238 -51 45 34 36 46 25 56 45 1 40 46 59 46 178 0 0 46 16 16 10 7 44 10 239 -51 45 50 42 46 42 3 45 17 46 47 15 53 179 0 0 46 32 19 10 7 45 9 240 -52 46 6 45 46 58 6 45 33 48 47 31 57 180 0 0 46 48 19 10 7 46 8 241 -52 46 22 44 47 14 6 45 49 48 47 47 57 -179 0 0 47 4 15 10 7 46 7 241 -52 46 38 40 47 30 2 46 5 43 48 3 54 -178 0 0 47 20 7 10 7 47 7 242 -52 46 54 32 47 45 55 46 21 35 48 19 46 -177 0 0 47 35 55 10 7 48 6 243 -52 47 10 20 48 1 43 46 37 23 48 35 34 -176 0 0 47 51 38 10 7 48 5 244 -53 47 26 4 48 17 26 46 53 7 48 51 17 -175 0 0 48 7 17 10 7 49 4 244 -53 47 41 42 48 33 4 47 8 45 49 6 55 -174 0 0 48 22 49 10 7 49 4 245 -53 47 57 15 48 48 37 47 24 18 49 22 27 -173 0 0 48 38 17 10 7 49 3 246 -53 48 12 42 49 4 4 47 39 46 49 37 54 -172 0 0 48 53 38 10 7 50 2 247 -53 48 28 4 49 19 25 .. .. .. 49 53 15 -171 0 0 49 8 53 10 7 50 2 247 -53 48 43 20 49 34 39 .. .. .. 50 8 29 -170 0 0 49 24 2 10 7 50 1 248 -53 48 58 29 49 49 47 .. .. .. 50 23 36 -169 0 0 49 39 4 10 7 50 0 249 -53 49 13 31 50 4 49 .. .. .. .. .. .. Uncertainty in time = +/- 2 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 5767-01721-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 37 45.2214 DE: -13 27 26.343 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .028, .031 ) * V mag [mag]: 12.0 * B mag [mag]: 12.7 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (67) Asia approx. diameter [km]: 62 approx. diameter ["]: .049 distance from Earth [AU]: 1.75100 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1312 number of rejected observations: 135 time covered by the observations: 1907 Nov 02 - 2012 Oct 25 1 sigma uncertainty ellipse (major, minor, PA): 0.009, 0.006, 78° remarks: * orbital elements for (67) Asia : Mean anomaly = 19.81933431 deg Arg. of pericenter = 106.22989871 deg Long. of node = 202.66361289 deg Inclination = 6.02767972 deg Eccentricity = 0.18407690 Semimajor axis = 2.42140734 AU Perihelion dist = 1.97568217 AU Mag: H = 8.28, G = 0.15 Epoch of elements : MJD 56231.42000000 TDT (2012 Oct 31.420) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 31 67 Asia 10h 4.3m UT 12.0 20 37 45.221-13 27 26.34TYC 5767-01721-1 12.7 12.3 62 2.9 1.751 4.092 6.01 118.2410 -13.458 24.82 -14.30 10.0722 -0.07143 0.71094 11.88743 1.19525 0.00518 0.00136 2000 19.44789220121030.00000106.229899202.663613 6.0276800.18407690 2.4214073 1.9756822 8.3 5.00.15 RATE 2.6157870 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.029 360 1.65 0.032 0 0 4-3 056226.0020121031_1721-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 21:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org