IOTA/IOTA-ES occultation update for (67) Asia / 2UCAC 27208567 event on 2012 Nov 04, 04:17 UT Visible from Canada, W USA Summary ------- On 2012 Nov 04 UT, the 62 km diameter asteroid (67) Asia will occult a 13.1 mag star in the constellation Aquarius for observers along a path across Canada, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 12.4 mag (the magnitude of the asteroid) for at most 2.8 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: 75 * date and approx. time of event: 2012 Nov 04, 04:16 - 2012 Nov 04, 04:20 UT * geocentric midpoint of event [JD]: 2456235.67854583 * magnitude of target star: 13.1 * magnitude drop [mag]: 0.5 * estimated maximum duration [s]: 2.8 * Moon: 77 % sunlit, 150° distance * Sun: 88° distance * rough path description: Canada, W USA The occultation path -------------------- * approximate projected width [km]: 96 * 1 sigma uncertainty interval [path widths]: +/- 0.76 * 1 sigma uncertainty interval [seconds]: +/- 6.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .117 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .117", .034", 90° ) * approx speed of asteroid's shadow [km/s]: 22.3220 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 27208567 by 67 Asia on 2012 Nov 4 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 -169 0 0 35 54 20 4 16 43 40 165 -1 35 28 10 36 20 44 34 48 50 37 1 22 -168 0 0 35 59 46 4 16 47 40 166 -1 35 33 34 36 26 11 34 54 12 37 6 50 -167 0 0 36 5 32 4 16 51 40 167 -2 35 39 19 36 31 59 34 59 55 37 12 40 -166 0 0 36 11 38 4 16 55 40 168 -3 35 45 24 36 38 6 35 5 58 37 18 49 -165 0 0 36 18 4 4 16 59 40 170 -4 35 51 49 36 44 34 35 12 21 37 25 19 -164 0 0 36 24 50 4 17 4 40 171 -5 35 58 33 36 51 21 35 19 4 37 32 9 -163 0 0 36 31 55 4 17 8 40 172 -5 36 5 37 36 58 28 35 26 6 37 39 18 -162 0 0 36 39 21 4 17 12 40 174 -6 36 13 1 37 5 55 35 33 27 37 46 47 -161 0 0 36 47 5 4 17 16 40 175 -7 36 20 44 37 13 41 35 41 7 37 54 36 -160 0 0 36 55 8 4 17 20 40 176 -8 36 28 45 37 21 46 35 49 7 38 2 44 -159 0 0 37 3 31 4 17 24 40 177 -9 36 37 6 37 30 10 35 57 25 38 11 11 -158 0 0 37 12 12 4 17 28 40 179 -10 36 45 45 37 38 53 36 6 1 38 19 56 -157 0 0 37 21 11 4 17 32 40 180 -10 36 54 43 37 47 54 36 14 56 38 29 1 -156 0 0 37 30 29 4 17 36 39 181 -11 37 3 59 37 57 14 36 24 10 38 38 23 -155 0 0 37 40 5 4 17 40 39 183 -12 37 13 33 38 6 51 36 33 41 38 48 4 -154 0 0 37 49 58 4 17 44 39 184 -13 37 23 24 38 16 47 36 43 29 38 58 2 -153 0 0 38 0 9 4 17 48 39 185 -14 37 33 33 38 27 0 36 53 35 39 8 19 -152 0 0 38 10 37 4 17 52 38 186 -15 37 43 59 38 37 30 37 3 58 39 18 52 -151 0 0 38 21 22 4 17 56 38 188 -15 37 54 42 38 48 17 37 14 38 39 29 42 -150 0 0 38 32 23 4 18 0 38 189 -16 38 5 41 38 59 21 37 25 34 39 40 50 -149 0 0 38 43 41 4 18 4 38 190 -17 38 16 57 39 10 41 37 36 47 39 52 13 -148 0 0 38 55 15 4 18 8 37 191 -18 38 28 29 39 22 17 37 48 16 40 3 53 -147 0 0 39 7 5 4 18 12 37 192 -19 38 40 16 39 34 9 38 0 0 40 15 48 -146 0 0 39 19 10 4 18 16 37 194 -19 38 52 19 39 46 16 38 11 59 40 27 59 -145 0 0 39 31 30 4 18 19 36 195 -20 39 4 37 39 58 39 38 24 14 40 40 25 -144 0 0 39 44 5 4 18 23 36 196 -21 39 17 10 40 11 16 38 36 43 40 53 6 -143 0 0 39 56 54 4 18 27 35 197 -22 39 29 56 40 24 7 38 49 27 41 6 1 -142 0 0 40 9 57 4 18 30 35 198 -23 39 42 57 40 37 13 39 2 24 41 19 11 -141 0 0 40 23 14 4 18 34 34 199 -23 39 56 12 40 50 32 39 15 35 41 32 34 -140 0 0 40 36 44 4 18 37 34 200 -24 40 9 39 41 4 4 39 29 0 41 46 10 -139 0 0 40 50 27 4 18 41 33 202 -25 40 23 20 41 17 50 39 42 37 41 59 59 -138 0 0 41 4 22 4 18 44 33 203 -26 40 37 13 41 31 48 39 56 26 42 14 1 -137 0 0 41 18 30 4 18 47 32 204 -26 40 51 18 41 45 58 40 10 28 42 28 15 -136 0 0 41 32 49 4 18 51 32 205 -27 41 5 35 42 0 19 40 24 42 42 42 40 -135 0 0 41 47 20 4 18 54 31 206 -28 41 20 3 42 14 52 40 39 6 42 57 17 -134 0 0 42 2 1 4 18 57 31 207 -29 41 34 43 42 29 36 40 53 42 43 12 4 -133 0 0 42 16 53 4 19 0 30 208 -29 41 49 32 42 44 30 41 8 28 43 27 2 -132 0 0 42 31 55 4 19 3 30 209 -30 42 4 32 42 59 35 41 23 24 43 42 10 -131 0 0 42 47 6 4 19 6 29 210 -31 42 19 41 43 14 48 41 38 30 43 57 28 -130 0 0 43 2 27 4 19 9 28 211 -31 42 34 59 43 30 11 41 53 45 44 12 55 -129 0 0 43 17 57 4 19 12 28 212 -32 42 50 27 43 45 43 42 9 9 44 28 30 -128 0 0 43 33 34 4 19 15 27 213 -33 43 6 2 44 1 23 42 24 42 44 44 14 -127 0 0 43 49 20 4 19 18 27 214 -34 43 21 45 44 17 11 42 40 22 45 0 5 -126 0 0 44 5 13 4 19 20 26 215 -34 43 37 36 44 33 6 42 56 9 45 16 4 -125 0 0 44 21 13 4 19 23 25 215 -35 43 53 34 44 49 8 43 12 4 45 32 10 -124 0 0 44 37 19 4 19 25 25 216 -35 44 9 38 45 5 17 43 28 5 45 48 21 -123 0 0 44 53 31 4 19 28 24 217 -36 44 25 49 45 21 31 43 44 13 46 4 39 -122 0 0 45 9 49 4 19 30 23 218 -37 44 42 5 45 37 51 44 0 26 46 21 3 -121 0 0 45 26 12 4 19 33 23 219 -37 44 58 26 45 54 16 44 16 44 46 37 31 -120 0 0 45 42 40 4 19 35 22 220 -38 45 14 52 46 10 46 44 33 7 46 54 4 -119 0 0 45 59 12 4 19 37 21 221 -38 45 31 22 46 27 20 44 49 34 47 10 40 -118 0 0 46 15 48 4 19 39 21 222 -39 45 47 55 46 43 57 45 6 6 47 27 21 -117 0 0 46 32 27 4 19 41 20 222 -40 46 4 33 47 0 38 45 22 40 47 44 4 -116 0 0 46 49 8 4 19 43 19 223 -40 46 21 13 47 17 21 45 39 18 48 0 51 -115 0 0 47 5 52 4 19 45 19 224 -41 46 37 55 47 34 7 45 55 58 48 17 39 -114 0 0 47 22 38 4 19 47 18 225 -41 46 54 39 47 50 55 46 12 40 48 34 29 -113 0 0 47 39 25 4 19 49 17 226 -42 47 11 25 48 7 44 46 29 24 48 51 20 -112 0 0 47 56 14 4 19 50 17 227 -42 47 28 12 48 24 33 46 46 9 49 8 12 -111 0 0 48 13 3 4 19 52 16 227 -43 47 45 0 48 41 24 47 2 54 49 25 5 -110 0 0 48 29 52 4 19 53 15 228 -43 48 1 47 48 58 14 47 19 40 49 41 57 -109 0 0 48 46 40 4 19 55 15 229 -43 48 18 35 49 15 4 47 36 26 49 58 49 -108 0 0 49 3 28 4 19 56 14 230 -44 48 35 22 49 31 53 47 53 11 50 15 39 -107 0 0 49 20 15 4 19 57 13 231 -44 48 52 7 49 48 40 48 9 55 50 32 29 -106 0 0 49 37 0 4 19 59 13 232 -45 49 8 51 50 5 26 48 26 38 50 49 16 -105 0 0 49 53 43 4 20 0 12 232 -45 49 25 33 50 22 10 48 43 19 51 6 1 -104 0 0 50 10 23 4 20 1 11 233 -45 49 42 13 50 38 51 48 59 57 51 22 44 -103 0 0 50 27 1 4 20 2 11 234 -46 49 58 50 50 55 30 49 16 33 51 39 23 -102 0 0 50 43 35 4 20 3 10 235 -46 50 15 24 51 12 5 49 33 6 51 55 59 -101 0 0 51 0 6 4 20 4 9 236 -46 50 31 54 51 28 36 49 49 36 52 12 31 -100 0 0 51 16 33 4 20 5 9 236 -47 50 48 20 51 45 3 50 6 2 52 28 59 - 99 0 0 51 32 55 4 20 5 8 237 -47 51 4 42 52 1 26 50 22 23 52 45 22 - 98 0 0 51 49 12 4 20 6 7 238 -47 51 21 0 52 17 43 50 38 40 53 1 40 - 97 0 0 52 5 25 4 20 7 7 239 -47 51 37 12 52 33 56 50 54 52 53 17 53 - 96 0 0 52 21 32 4 20 7 6 240 -47 51 53 19 52 50 3 51 10 59 53 34 0 - 95 0 0 52 37 33 4 20 8 5 240 -48 52 9 20 53 6 4 51 27 1 53 50 1 - 94 0 0 52 53 28 4 20 8 5 241 -48 52 25 15 53 21 59 51 42 56 54 5 56 - 93 0 0 53 9 16 4 20 9 4 242 -48 52 41 4 53 37 47 51 58 45 54 21 44 - 92 0 0 53 24 58 4 20 9 3 243 -48 52 56 46 53 53 28 .. .. .. 54 37 24 - 91 0 0 53 40 33 4 20 9 3 244 -48 53 12 21 54 9 3 .. .. .. 54 52 58 - 90 0 0 53 56 0 4 20 9 2 244 -48 53 27 49 54 24 29 .. .. .. 55 8 24 - 89 0 0 54 11 20 4 20 9 1 245 -48 53 43 10 54 39 49 .. .. .. 55 23 42 - 88 0 0 54 26 32 4 20 9 1 246 -48 53 58 22 54 55 0 .. .. .. 55 38 52 - 87 0 0 54 41 35 4 20 9 0 247 -48 54 13 26 .. .. .. .. .. .. .. .. .. Uncertainty in time = +/- 7 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: 2UCAC 27208567 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 43 59.2176 DE: -13 17 26.669 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .117, .034 ) * V mag [mag]: 13.1 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (67) Asia approx. diameter [km]: 62 approx. diameter ["]: .048 distance from Earth [AU]: 1.79500 * 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 = 20.80271255 deg Arg. of pericenter = 106.22994201 deg Long. of node = 202.66357913 deg Inclination = 6.02768337 deg Eccentricity = 0.18407446 Semimajor axis = 2.42140068 AU Perihelion dist = 1.97568266 AU Mag: H = 8.28, G = 0.15 Epoch of elements : MJD 56235.17900000 TDT (2012 Nov 04.179) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 4 67 Asia 4h 17.1m UT 13.1 20 43 59.218-13 17 26.672UCAC 27208567 0.0 12.4 62 2.8 1.795 4.198 7.30 -157.0990 -13.292 111.62 -15.48 4.2851 -0.08981 0.75893 12.51083 1.48951 0.00519 0.00142 2000 19.44799220121030.00000106.229942202.663579 6.0276830.18407446 2.4214007 1.9756827 8.3 5.00.15 RATE 2.6157970 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.117 0.034 90 1.76 0.036 0 0-4 1 056226.0020121104_208567 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 21:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org