IOTA/IOTA-ES occultation update for (1266) Tone / TYC 2919-01407-1 event on 2012 Dec 10, 12:17 UT Visible from USA, W Canada, E Russia, China Summary ------- On 2012 Dec 10 UT, the 89 km diameter asteroid (1266) Tone will occult a 11.6 mag star in the constellation Auriga for observers along a path across USA, W Canada, E Russia, China. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.2 mag to 14.7 mag (the magnitude of the asteroid) for at most 6.0 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: 89 * date and approx. time of event: 2012 Dec 10, 12:11 - 2012 Dec 10, 12:24 UT * geocentric midpoint of event [JD]: 2456272.01222917 * magnitude of target star: 11.6 * magnitude drop [mag]: 3.2 * estimated maximum duration [s]: 6.0 * Moon: 12 % sunlit, 128° distance * Sun: 158° distance * rough path description: USA, W Canada, E Russia, China The occultation path -------------------- * approximate projected width [km]: 93 * 1 sigma uncertainty interval [path widths]: +/- 0.53 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .029", .025", 97° ) * approx speed of asteroid's shadow [km/s]: 14.7206 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2919-01407-1 by 1266 Tone on 2012 Dec 10 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 85 0 0 8 39 1 12 24 31 1 47 -6 9 13 45 8 4 25 9 50 43 7 27 53 86 0 0 9 36 9 12 24 31 2 47 -7 10 11 0 9 1 25 10 48 7 8 24 45 87 0 0 10 33 33 12 24 30 4 47 -9 11 8 32 9 58 42 11 45 47 9 21 55 88 0 0 11 31 11 12 24 30 5 47 -10 12 6 17 10 56 13 12 43 39 10 19 19 89 0 0 12 29 0 12 24 28 6 47 -11 13 4 12 11 53 56 13 41 41 11 16 54 90 0 0 13 26 56 12 24 27 8 48 -12 14 2 14 12 51 46 14 39 49 12 14 38 91 0 0 14 24 56 12 24 26 9 48 -14 15 0 20 13 49 41 15 38 1 13 12 28 92 0 0 15 22 58 12 24 24 10 48 -15 15 58 27 14 47 38 16 36 13 14 10 21 93 0 0 16 20 59 12 24 22 12 48 -16 16 56 31 15 45 35 17 34 22 15 8 13 94 0 0 17 18 54 12 24 19 13 49 -17 17 54 30 16 43 27 18 32 25 16 6 1 95 0 0 18 16 42 12 24 17 14 49 -18 18 52 21 17 41 12 19 30 19 17 3 43 96 0 0 19 14 19 12 24 14 16 49 -20 19 50 1 18 38 47 20 28 1 18 1 16 97 0 0 20 11 43 12 24 11 17 50 -21 20 47 26 19 36 8 21 25 28 18 58 35 98 0 0 21 8 49 12 24 8 18 50 -22 21 44 34 20 33 14 22 22 37 19 55 40 99 0 0 22 5 36 12 24 5 20 50 -23 22 41 21 21 30 1 23 19 25 20 52 26 100 0 0 23 2 1 12 24 1 21 51 -24 23 37 46 22 26 25 24 15 50 21 48 51 101 0 0 23 58 1 12 23 57 22 51 -25 24 33 45 23 22 26 25 11 48 22 44 53 102 0 0 24 53 33 12 23 53 24 52 -26 25 29 16 24 18 0 26 7 18 23 40 28 103 0 0 25 48 35 12 23 49 25 52 -28 26 24 16 25 13 4 27 2 16 24 35 34 104 0 0 26 43 5 12 23 45 26 53 -29 27 18 43 26 7 36 27 56 40 25 30 9 105 0 0 27 37 0 12 23 40 27 53 -30 28 12 35 27 1 34 28 50 29 26 24 10 106 0 0 28 30 18 12 23 36 28 54 -31 29 5 50 27 54 56 29 43 39 27 17 36 107 0 0 29 22 58 12 23 31 30 55 -32 29 58 25 28 47 40 30 36 10 28 10 24 108 0 0 30 14 57 12 23 26 31 55 -33 30 50 19 29 39 43 31 27 58 29 2 33 109 0 0 31 6 13 12 23 21 32 56 -34 31 41 30 30 31 5 32 19 4 29 54 0 110 0 0 31 56 45 12 23 16 33 56 -35 32 31 56 31 21 43 33 9 24 30 44 45 111 0 0 32 46 32 12 23 11 34 57 -35 33 21 37 32 11 36 33 58 57 31 34 44 112 0 0 33 35 32 12 23 6 35 58 -36 34 10 30 33 0 43 34 47 43 32 23 58 113 0 0 34 23 44 12 23 0 37 59 -37 34 58 35 33 49 3 35 35 40 33 12 25 114 0 0 35 11 8 12 22 55 38 59 -38 35 45 50 34 36 34 36 22 48 34 0 4 115 0 0 35 57 41 12 22 49 39 60 -39 36 32 16 35 23 15 37 9 4 34 46 54 116 0 0 36 43 24 12 22 44 40 61 -40 37 17 50 36 9 6 37 54 29 35 32 54 117 0 0 37 28 15 12 22 38 41 62 -41 38 2 32 36 54 6 38 39 2 36 18 4 118 0 0 38 12 15 12 22 33 42 63 -41 38 46 23 37 38 15 39 22 43 37 2 22 119 0 0 38 55 22 12 22 27 43 63 -42 39 29 20 38 21 32 40 5 30 37 45 48 120 0 0 39 37 37 12 22 22 44 64 -43 40 11 25 39 3 56 40 47 25 38 28 23 121 0 0 40 18 59 12 22 16 45 65 -43 40 52 37 39 45 28 41 28 26 39 10 5 122 0 0 40 59 28 12 22 10 46 66 -44 41 32 56 40 26 7 42 8 34 39 50 55 123 0 0 41 39 4 12 22 5 47 67 -45 42 12 22 41 5 54 42 47 48 40 30 53 124 0 0 42 17 47 12 21 59 48 68 -45 42 50 54 41 44 48 43 26 9 41 9 58 125 0 0 42 55 38 12 21 53 49 69 -46 43 28 34 42 22 49 44 3 38 41 48 11 126 0 0 43 32 36 12 21 48 49 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15 47 67 236 -46 59 49 38 58 58 22 60 16 55 58 31 17 -149 0 0 59 17 11 12 15 43 67 238 -45 59 42 55 58 51 31 60 10 16 58 24 22 -148 0 0 59 10 0 12 15 39 66 239 -45 59 35 48 58 44 15 60 3 13 58 17 1 -147 0 0 59 2 23 12 15 35 66 241 -45 59 28 16 58 36 34 59 55 46 58 9 16 -146 0 0 58 54 22 12 15 32 66 243 -44 59 20 20 58 28 28 59 47 55 58 1 5 -145 0 0 58 45 56 12 15 28 65 244 -44 59 11 58 58 19 57 59 39 39 57 52 29 -144 0 0 58 37 4 12 15 24 65 246 -44 59 3 11 58 11 0 59 30 57 57 43 26 -143 0 0 58 27 45 12 15 20 64 247 -43 58 53 58 58 1 36 59 21 50 57 33 57 -142 0 0 58 18 1 12 15 16 64 249 -43 58 44 19 57 51 46 59 12 17 57 24 1 -141 0 0 58 7 49 12 15 12 63 250 -43 58 34 14 57 41 29 59 2 18 57 13 37 -140 0 0 57 57 11 12 15 9 63 252 -42 58 23 41 57 30 44 58 51 52 57 2 46 -139 0 0 57 46 4 12 15 5 63 253 -42 58 12 41 57 19 31 58 40 58 56 51 27 -138 0 0 57 34 30 12 15 1 62 255 -41 58 1 13 57 7 50 58 29 37 56 39 39 -137 0 0 57 22 26 12 14 57 62 256 -41 57 49 17 56 55 40 58 17 48 56 27 22 -136 0 0 57 9 54 12 14 53 61 258 -41 57 36 51 56 43 1 58 5 30 56 14 35 -135 0 0 56 56 52 12 14 49 61 259 -40 57 23 56 56 29 52 57 52 43 56 1 19 -134 0 0 56 43 20 12 14 45 60 261 -40 57 10 31 56 16 12 57 39 26 55 47 31 -133 0 0 56 29 17 12 14 41 60 262 -39 56 56 36 56 2 2 57 25 39 55 33 13 -132 0 0 56 14 42 12 14 37 59 263 -39 56 42 10 55 47 19 57 11 21 55 18 23 -131 0 0 55 59 36 12 14 32 59 265 -39 56 27 12 55 32 5 56 56 31 55 3 0 -130 0 0 55 43 57 12 14 28 58 266 -38 56 11 41 55 16 18 56 41 10 54 47 4 -129 0 0 55 27 46 12 14 24 58 267 -38 55 55 38 54 59 58 56 25 15 54 30 35 -128 0 0 55 11 0 12 14 20 57 269 -37 55 39 1 54 43 4 56 8 48 54 13 32 -127 0 0 54 53 40 12 14 16 57 270 -37 55 21 50 54 25 35 55 51 46 53 55 54 -126 0 0 54 35 45 12 14 12 56 271 -36 55 4 4 54 7 30 55 34 10 53 37 40 -125 0 0 54 17 14 12 14 7 55 272 -36 54 45 42 53 48 50 55 15 58 53 18 50 -124 0 0 53 58 6 12 14 3 55 273 -35 54 26 44 53 29 33 54 57 10 52 59 23 -123 0 0 53 38 22 12 13 59 54 275 -35 54 7 9 53 9 39 54 37 46 52 39 19 -122 0 0 53 17 59 12 13 54 54 276 -34 53 46 56 52 49 7 54 17 44 52 18 36 -121 0 0 52 56 58 12 13 50 53 277 -34 53 26 5 52 27 55 53 57 3 51 57 14 -120 0 0 52 35 17 12 13 46 52 278 -33 53 4 35 52 6 5 53 35 44 51 35 13 -119 0 0 52 12 56 12 13 41 52 279 -32 52 42 24 51 43 33 53 13 44 51 12 31 -118 0 0 51 49 54 12 13 37 51 280 -32 52 19 33 51 20 21 52 51 4 50 49 7 -117 0 0 51 26 11 12 13 32 50 281 -31 51 56 0 50 56 27 52 27 43 50 25 2 -116 0 0 51 1 44 12 13 28 50 283 -31 51 31 45 50 31 50 52 3 39 50 0 14 -115 0 0 50 36 35 12 13 23 49 284 -30 51 6 46 50 6 30 51 38 53 49 34 42 -114 0 0 50 10 42 12 13 19 48 285 -29 50 41 4 49 40 25 51 13 22 49 8 26 -113 0 0 49 44 3 12 13 14 48 286 -29 50 14 37 49 13 36 50 47 7 48 41 25 -112 0 0 49 16 39 12 13 10 47 287 -28 49 47 24 48 46 1 50 20 6 48 13 39 -111 0 0 48 48 29 12 13 5 46 288 -27 49 19 25 48 17 39 49 52 20 47 45 5 -110 0 0 48 19 32 12 13 0 45 289 -27 48 50 39 47 48 31 49 23 46 47 15 45 -109 0 0 47 49 46 12 12 56 45 290 -26 48 21 5 47 18 34 48 54 24 46 45 36 -108 0 0 47 19 13 12 12 51 44 291 -25 47 50 43 46 47 49 48 24 15 46 14 39 -107 0 0 46 47 50 12 12 47 43 292 -25 47 19 32 46 16 14 47 53 15 45 42 52 -106 0 0 46 15 37 12 12 42 42 293 -24 46 47 30 45 43 50 47 21 26 45 10 16 -105 0 0 45 42 33 12 12 37 41 294 -23 46 14 38 45 10 35 46 48 47 44 36 49 -104 0 0 45 8 38 12 12 33 40 294 -22 45 40 55 44 36 29 46 15 16 44 2 31 -103 0 0 44 33 52 12 12 28 40 295 -21 45 6 20 44 1 31 45 40 53 43 27 21 -102 0 0 43 58 14 12 12 23 39 296 -21 44 30 53 43 25 41 45 5 38 42 51 20 -101 0 0 43 21 42 12 12 19 38 297 -20 43 54 33 42 48 59 44 29 31 42 14 26 -100 0 0 42 44 18 12 12 14 37 298 -19 43 17 20 42 11 24 43 52 30 41 36 39 - 99 0 0 42 6 1 12 12 10 36 299 -18 42 39 14 41 32 55 43 14 35 40 57 59 - 98 0 0 41 26 50 12 12 5 35 299 -17 42 0 14 40 53 34 42 35 47 40 18 26 - 97 0 0 40 46 45 12 12 1 34 300 -16 41 20 20 40 13 18 41 56 4 39 37 59 - 96 0 0 40 5 46 12 11 56 33 301 -15 40 39 32 39 32 9 41 15 27 38 56 39 - 95 0 0 39 23 54 12 11 52 32 302 -14 39 57 49 38 50 7 40 33 56 38 14 26 - 94 0 0 38 41 8 12 11 48 31 303 -14 39 15 13 38 7 11 39 51 31 37 31 20 - 93 0 0 37 57 28 12 11 43 30 303 -13 38 31 43 37 23 21 39 8 11 36 47 20 - 92 0 0 37 12 55 12 11 39 29 304 -12 37 47 20 36 38 39 38 23 58 36 2 28 - 91 0 0 36 27 30 12 11 35 28 305 -11 37 2 3 35 53 5 37 38 51 35 16 44 - 90 0 0 35 41 12 12 11 31 27 305 -10 36 15 54 35 6 38 36 52 51 34 30 9 - 89 0 0 34 54 3 12 11 27 26 306 -9 35 28 53 34 19 21 36 5 59 33 42 43 - 88 0 0 34 6 3 12 11 23 24 307 -7 34 41 1 33 31 13 35 18 15 32 54 27 - 87 0 0 33 17 13 12 11 20 23 307 -6 33 52 19 32 42 16 34 29 41 32 5 22 - 86 0 0 32 27 34 12 11 16 22 308 -5 33 2 47 31 52 30 33 40 17 31 15 29 - 85 0 0 31 37 9 12 11 12 21 308 -4 32 12 28 31 1 58 32 50 5 30 24 50 - 84 0 0 30 45 57 12 11 9 20 309 -3 31 21 22 30 10 40 31 59 5 29 33 26 - 83 0 0 29 54 0 12 11 6 19 309 -2 30 29 31 29 18 38 31 7 20 28 41 18 - 82 0 0 29 1 21 12 11 3 17 310 -1 29 36 57 28 25 54 30 14 51 27 48 29 Uncertainty in time = +/- 4 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 2919-01407-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 49 52.3536 DE: +42 58 27.100 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .017, .018 ) * V mag [mag]: 11.6 * B mag [mag]: 11.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1266) Tone approx. diameter [km]: 89 approx. diameter ["]: .047 distance from Earth [AU]: 2.59400 * orbital information: orbit source: Preston date of fit: 2012 Nov 29 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1019 number of rejected observations: 41 time covered by the observations: 1927 Jan 23 - 2012 Nov 29 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.017, 101° remarks: * orbital elements for (1266) Tone : Mean anomaly = 189.49648855 deg Arg. of pericenter = 294.78471158 deg Long. of node = 320.72660097 deg Inclination = 17.14378389 deg Eccentricity = 0.04840570 Semimajor axis = 3.36736239 AU Perihelion dist = 3.20436285 AU Mag: H = 9.32, G = 0.15 Epoch of elements : MJD 56271.51200000 TDT (2012 Dec 10.512) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 10 1266 Tone 12h 17.6m UT 11.6 5 49 52.354 42 58 27.10TYC 2919-01407-1 11.9 14.7 89 6.0 2.594 -2.554 -2.88 -176.5655 42.975 -6.15 -22.97 12.2935 -0.02958 0.28826 -8.26555 -0.84572 -0.00098 -0.00203 2000 189.255320201212 9.00000294.784712320.726601 17.1437840.04840570 3.3673624 3.2043629 9.4 5.00.15 RATE 1.5950320 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.029 0.025 97 1.53 0.025 0 0-4 0 056264.0020121210_1407-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 29, 23:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org