IOTA/IOTA-ES occultation update for (1291) Phryne / TYC 0645-00217-1 event on 2012 Oct 26, 16:45 UT Visible from Australia Summary ------- On 2012 Oct 26 UT, the 31 km diameter asteroid (1291) Phryne will occult a 10.3 mag star in the constellation Aries for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.0 mag to 14.3 mag (the magnitude of the asteroid) for at most 2.5 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: 43 * date and approx. time of event: 2012 Oct 26, 16:40 - 2012 Oct 26, 16:51 UT * geocentric midpoint of event [JD]: 2456227.19830833 * magnitude of target star: 10.3 * magnitude drop [mag]: 4.0 * estimated maximum duration [s]: 2.5 * Moon: 91 % sunlit, 43° distance * Sun: 172° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 1.51 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .046 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .031", 85° ) * approx speed of asteroid's shadow [km/s]: 12.5060 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0645-00217-1 by 1291 Phryne on 2012 Oct 26 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 ' " Longitude Longitude Longitude Longitude 75 30 23 -72 0 0 16 51 11 0 34 -3 74 40 37 76 20 0 ... .. .. 78 48 58 77 38 47 -71 0 0 16 51 11 1 32 -5 76 51 53 78 25 33 ... .. .. 80 46 10 Latitude Latitude Latitude Latitude 78 0 0 -70 49 38 16 51 11 2 32 -5 -70 27 0 -71 12 34 .. .. .. -72 23 50 79 0 0 -70 19 38 16 51 11 2 31 -5 -69 56 51 -70 42 44 .. .. .. -71 54 32 80 0 0 -69 48 36 16 51 10 3 30 -6 -69 25 41 -70 11 51 -68 18 13 -71 24 8 81 0 0 -69 16 32 16 51 10 4 29 -7 -68 53 28 -69 39 54 -67 45 39 -70 52 38 82 0 0 -68 43 23 16 51 9 4 28 -7 -68 20 13 -69 6 53 -67 12 5 -70 20 1 83 0 0 -68 9 12 16 51 8 5 27 -8 -67 45 56 -68 32 48 -66 37 31 -69 46 16 84 0 0 -67 33 57 16 51 8 6 26 -9 -67 10 36 -67 57 38 -66 1 58 -69 11 24 85 0 0 -66 57 39 16 51 7 6 25 -9 -66 34 14 -67 21 25 -65 25 25 -68 35 24 86 0 0 -66 20 19 16 51 6 7 25 -10 -65 56 51 -66 44 7 -64 47 54 -67 58 16 87 0 0 -65 41 57 16 51 4 8 24 -11 -65 18 27 -66 5 47 -64 9 26 -67 20 2 88 0 0 -65 2 34 16 51 3 9 23 -11 -64 39 4 -65 26 25 -63 30 1 -66 40 43 89 0 0 -64 22 12 16 51 1 9 22 -12 -63 58 42 -64 46 3 -62 49 40 -66 0 20 90 0 0 -63 40 53 16 50 59 10 21 -13 -63 17 24 -64 4 42 -62 8 27 -65 18 54 91 0 0 -62 58 38 16 50 57 11 20 -14 -62 35 12 -63 22 24 -61 26 21 -64 36 28 92 0 0 -62 15 29 16 50 55 12 19 -15 -61 52 7 -62 39 12 -60 43 26 -63 53 3 93 0 0 -61 31 29 16 50 53 13 18 -15 -61 8 11 -61 55 7 -59 59 44 -63 8 42 94 0 0 -60 46 40 16 50 50 13 17 -16 -60 23 28 -61 10 12 -59 15 16 -62 23 28 95 0 0 -60 1 5 16 50 47 14 16 -17 -59 38 0 -60 24 31 -58 30 6 -61 37 24 96 0 0 -59 14 47 16 50 44 15 15 -18 -58 51 49 -59 38 5 -57 44 16 -60 50 33 97 0 0 -58 27 49 16 50 41 16 14 -19 -58 4 59 -58 50 58 -56 57 50 -60 2 59 98 0 0 -57 40 15 16 50 37 17 13 -20 -57 17 34 -58 3 14 -56 10 49 -59 14 43 99 0 0 -56 52 6 16 50 33 18 13 -20 -56 29 35 -57 14 56 -55 23 18 -58 25 52 100 0 0 -56 3 28 16 50 29 19 12 -21 -55 41 7 -56 26 7 -54 35 19 -57 36 27 101 0 0 -55 14 23 16 50 25 20 11 -22 -54 52 13 -55 36 50 -53 46 56 -56 46 33 102 0 0 -54 24 54 16 50 20 21 10 -23 -54 2 56 -54 47 10 -52 58 11 -55 56 14 103 0 0 -53 35 6 16 50 15 22 9 -24 -53 13 20 -53 57 9 -52 9 9 -55 5 33 104 0 0 -52 45 2 16 50 10 22 8 -25 -52 23 28 -53 6 52 -51 19 51 -54 14 34 105 0 0 -51 54 45 16 50 5 23 7 -25 -51 33 23 -52 16 22 -50 30 23 -53 23 20 106 0 0 -51 4 18 16 49 59 24 6 -26 -50 43 10 -51 25 42 -49 40 45 -52 31 57 107 0 0 -50 13 45 16 49 53 25 5 -27 -49 52 50 -50 34 55 -48 51 3 -51 40 26 108 0 0 -49 23 9 16 49 47 26 4 -28 -49 2 27 -49 44 6 -48 1 18 -50 48 52 109 0 0 -48 32 34 16 49 41 27 3 -29 -48 12 5 -48 53 16 -47 11 34 -49 57 17 110 0 0 -47 42 2 16 49 34 28 2 -29 -47 21 47 -48 2 30 -46 21 54 -49 5 46 111 0 0 -46 51 36 16 49 28 29 1 -30 -46 31 35 -47 11 51 -45 32 20 -48 14 21 112 0 0 -46 1 20 16 49 21 29 360 -31 -45 41 32 -46 21 20 -44 42 55 -47 23 6 113 0 0 -45 11 15 16 49 14 30 358 -32 -44 51 41 -45 31 2 -43 53 42 -46 32 3 114 0 0 -44 21 25 16 49 6 31 357 -32 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14 -34 28 50 -33 5 25 -35 20 33 128 0 0 -33 29 2 16 47 8 40 340 -39 -33 12 28 -33 45 43 -32 23 9 -34 36 52 129 0 0 -32 46 46 16 46 59 40 339 -39 -32 30 22 -33 3 17 -31 41 32 -33 53 53 130 0 0 -32 5 11 16 46 49 40 337 -39 -31 48 57 -32 21 32 -31 0 36 -33 11 36 131 0 0 -31 24 19 16 46 40 41 336 -39 -31 8 14 -31 40 29 -30 20 21 -32 30 3 132 0 0 -30 44 9 16 46 31 41 334 -39 -30 28 14 -31 0 10 -29 40 47 -31 49 13 133 0 0 -30 4 42 16 46 22 41 333 -39 -29 48 57 -30 20 34 -29 1 56 -31 9 8 134 0 0 -29 26 0 16 46 12 41 332 -39 -29 10 23 -29 41 43 -28 23 49 -30 29 49 135 0 0 -28 48 3 16 46 3 42 330 -39 -28 32 35 -29 3 37 -27 46 25 -29 51 15 136 0 0 -28 10 51 16 45 54 42 329 -39 -27 55 31 -28 26 17 -27 9 46 -29 13 28 137 0 0 -27 34 25 16 45 44 42 327 -39 -27 19 13 -27 49 43 -26 33 51 -28 36 28 138 0 0 -26 58 45 16 45 35 42 326 -39 -26 43 41 -27 13 55 -25 58 42 -28 0 16 139 0 0 -26 23 52 16 45 26 42 325 -39 -26 8 56 -26 38 54 -25 24 19 -27 24 51 140 0 0 -25 49 46 16 45 17 42 323 -38 -25 34 57 -26 4 41 -24 50 42 -26 50 14 141 0 0 -25 16 28 16 45 8 42 322 -38 -25 1 46 -25 31 15 -24 17 51 -26 16 26 142 0 0 -24 43 57 16 44 59 41 321 -38 -24 29 22 -24 58 37 -23 45 47 -25 43 26 143 0 0 -24 12 14 16 44 49 41 320 -38 -23 57 46 -24 26 48 -23 14 30 -25 11 15 144 0 0 -23 41 20 16 44 41 41 318 -37 -23 26 57 -23 55 47 -22 44 1 -24 39 54 145 0 0 -23 11 13 16 44 32 41 317 -37 -22 56 57 -23 25 34 -22 14 19 -24 9 21 146 0 0 -22 41 56 16 44 23 41 316 -36 -22 27 46 -22 56 10 -21 45 25 -23 39 38 147 0 0 -22 13 27 16 44 14 40 315 -36 -21 59 22 -22 27 35 -21 17 18 -23 10 45 148 0 0 -21 45 46 16 44 5 40 313 -36 -21 31 48 -21 59 49 -20 50 0 -22 42 42 149 0 0 -21 18 55 16 43 57 40 312 -35 -21 5 1 -21 32 52 -20 23 29 -22 15 28 150 0 0 -20 52 52 16 43 48 39 311 -35 -20 39 4 -21 6 45 -19 57 47 -21 49 4 151 0 0 -20 27 39 16 43 40 39 310 -34 -20 13 56 -20 41 26 -19 32 53 -21 23 30 152 0 0 -20 3 15 16 43 32 38 309 -33 -19 49 36 -20 16 57 -19 8 48 -20 58 46 153 0 0 -19 39 40 16 43 23 38 308 -33 -19 26 6 -19 53 17 -18 45 31 -20 34 52 154 0 0 -19 16 54 16 43 15 37 307 -32 -19 3 24 -19 30 27 -18 23 2 -20 11 48 155 0 0 -18 54 57 16 43 7 37 306 -32 -18 41 32 -19 8 26 -18 1 22 -19 49 33 156 0 0 -18 33 50 16 43 0 36 305 -31 -18 20 28 -18 47 15 -17 40 30 -19 28 9 157 0 0 -18 13 31 16 42 52 36 304 -30 -18 0 14 -18 26 53 -17 20 27 -19 7 35 158 0 0 -17 54 2 16 42 44 35 303 -30 -17 40 48 -18 7 20 -17 1 12 -18 47 51 159 0 0 -17 35 22 16 42 37 35 303 -29 -17 22 12 -17 48 37 -16 42 46 -18 28 57 160 0 0 -17 17 32 16 42 29 34 302 -28 -17 4 25 -17 30 43 -16 25 8 -18 10 53 161 0 0 -17 0 31 16 42 22 33 301 -28 -16 47 26 -17 13 38 -16 8 19 -17 53 38 162 0 0 -16 44 19 16 42 15 33 300 -27 -16 31 17 -16 57 23 -15 52 18 -17 37 14 163 0 0 -16 28 56 16 42 8 32 300 -26 -16 15 57 -16 41 57 -15 37 6 -17 21 40 164 0 0 -16 14 22 16 42 2 31 299 -25 -16 1 26 -16 27 21 -15 22 43 -17 6 55 165 0 0 -16 0 37 16 41 55 31 298 -25 -15 47 44 -16 13 34 -15 9 8 -16 53 1 166 0 0 -15 47 42 16 41 48 30 298 -24 -15 34 51 -16 0 37 -14 56 22 -16 39 56 167 0 0 -15 35 36 16 41 42 29 297 -23 -15 22 47 -15 48 29 -14 44 24 -16 27 42 168 0 0 -15 24 19 16 41 36 28 296 -22 -15 11 32 -15 37 10 -14 33 14 -16 16 17 169 0 0 -15 13 52 16 41 30 28 296 -21 -15 1 6 -15 26 40 -14 22 54 -16 5 42 170 0 0 -15 4 13 16 41 24 27 295 -21 -14 51 30 -15 17 0 -14 13 22 -15 55 57 171 0 0 -14 55 24 16 41 18 26 295 -20 -14 42 42 -15 8 10 -14 4 38 -15 47 2 172 0 0 -14 47 24 16 41 13 25 294 -19 -14 34 43 -15 0 9 -13 56 44 -15 38 56 173 0 0 -14 40 14 16 41 8 24 294 -18 -14 27 34 -14 52 57 -13 49 38 -15 31 41 174 0 0 -14 33 53 16 41 2 24 293 -17 -14 21 14 -14 46 35 -13 43 20 -15 25 16 175 0 0 -14 28 21 16 40 57 23 293 -16 -14 15 43 -14 41 2 -13 37 52 -15 19 41 176 0 0 -14 23 39 16 40 52 22 293 -15 -14 11 1 -14 36 20 -13 33 12 -15 14 56 177 0 0 -14 19 46 16 40 48 21 292 -14 -14 7 9 -14 32 26 -13 29 21 -15 11 2 178 0 0 -14 16 43 16 40 43 20 292 -14 -14 4 6 -14 29 23 -13 26 19 -15 7 57 179 0 0 -14 14 30 16 40 39 19 291 -13 -14 1 53 -14 27 9 -13 24 7 -15 5 43 180 0 0 -14 13 6 16 40 35 18 291 -12 -14 0 30 -14 25 46 -13 22 43 -15 4 20 -179 0 0 -14 12 33 16 40 31 18 291 -11 -13 59 56 -14 25 12 -13 22 9 -15 3 47 -178 0 0 -14 12 49 16 40 27 17 290 -10 -14 0 12 -14 25 29 -13 22 24 -15 4 4 -177 0 0 -14 13 55 16 40 24 16 290 -9 -14 1 18 -14 26 36 -13 23 29 -15 5 13 -176 0 0 -14 15 52 16 40 20 15 290 -8 -14 3 14 -14 28 33 -13 25 23 -15 7 12 -175 0 0 -14 18 39 16 40 17 14 289 -7 -14 6 0 -14 31 21 -13 28 7 -15 10 3 -174 0 0 -14 22 17 16 40 14 13 289 -6 -14 9 37 -14 35 0 -13 31 41 -15 13 44 -173 0 0 -14 26 46 16 40 11 12 289 -5 -14 14 5 -14 39 30 -13 36 5 -15 18 17 -172 0 0 -14 32 5 16 40 9 11 288 -4 -14 19 23 -14 44 50 -13 41 19 -15 23 42 -171 0 0 -14 38 15 16 40 6 10 288 -3 -14 25 32 -14 51 2 -13 47 24 -15 29 59 -170 0 0 -14 45 17 16 40 4 9 288 -2 -14 32 32 -14 58 6 -13 54 19 -15 37 7 -169 0 0 -14 53 10 16 40 2 8 288 -1 -14 40 23 -15 6 1 -14 2 5 -15 45 8 -168 0 0 -15 1 55 16 40 0 7 287 0 -14 49 6 -15 14 48 -14 10 42 -15 54 1 Uncertainty in time = +/- 5 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 0645-00217-1 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 36 56.2123 DE: +14 33 56.607 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .032, .025 ) * V mag [mag]: 10.3 * B mag [mag]: 10.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1291) Phryne approx. diameter [km]: 31 approx. diameter ["]: .023 distance from Earth [AU]: 1.89500 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1127 number of rejected observations: 60 time covered by the observations: 1907 Oct 04 - 2012 Sep 27 1 sigma uncertainty ellipse (major, minor, PA): 0.034, 0.019, 81° remarks: * orbital elements for (1291) Phryne : Mean anomaly = 56.24706079 deg Arg. of pericenter = 117.70435040 deg Long. of node = 215.70123019 deg Inclination = 9.11884767 deg Eccentricity = 0.08987461 Semimajor axis = 3.01502740 AU Perihelion dist = 2.74405298 AU Mag: H = 10.27, G = 0.15 Epoch of elements : MJD 56226.69800000 TDT (2012 Oct 26.698) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 26 1291 Phryne 16h 45.6m UT 10.3 2 36 56.212 14 33 56.61TYC 0645-00217-1 10.9 14.3 31 2.5 1.895 -1.931 -16.95 112.3828 14.570 -75.41 -12.74 16.7594 0.38527 -0.63830 -6.04055 -3.65203 -0.00077 -0.00017 2000 54.98606920121020.00000117.704350215.701230 9.1188480.08987461 3.0150274 2.744053010.3 5.00.15 RATE 1.8826400 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.031 85 2.51 0.034 0 0 3-3 056208.0020121026_0217-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 19:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org