IOTA/IOTA-ES occultation update for (218) Bianca / TYC 0153-01137-1 event on 2012 Nov 24, 16:47 UT Visible from SE Australia Summary ------- On 2012 Nov 24 UT, the 61 km diameter asteroid (218) Bianca will occult a 10.9 mag star in the constellation Monoceros for observers along a path across SE Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 13.2 mag (the magnitude of the asteroid) for at most 7.7 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: 86 * date and approx. time of event: 2012 Nov 24, 16:41 - 2012 Nov 24, 16:59 UT * geocentric midpoint of event [JD]: 2456256.1999375 * magnitude of target star: 10.9 * magnitude drop [mag]: 2.4 * estimated maximum duration [s]: 7.7 * Moon: 86 % sunlit, 87° distance * Sun: 134° distance * rough path description: SE Australia The occultation path -------------------- * approximate projected width [km]: 72 * 1 sigma uncertainty interval [path widths]: +/- 0.58 * 1 sigma uncertainty interval [seconds]: +/- 5.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .028 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .028", .021", 90° ) * approx speed of asteroid's shadow [km/s]: 7.8647 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0153-01137-1 by 218 Bianca on 2012 Nov 24 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 66 0 0 -65 0 47 16 59 20 3 79 0 -64 41 11 -65 20 27 -64 18 32 -65 43 22 67 0 0 -64 56 38 16 59 20 3 79 0 -64 37 0 -65 16 21 -64 14 18 -65 39 18 68 0 0 -64 52 11 16 59 19 3 78 -1 -64 32 30 -65 11 56 -64 9 46 -65 34 56 69 0 0 -64 47 26 16 59 19 4 77 -1 -64 27 42 -65 7 13 -64 4 55 -65 30 16 70 0 0 -64 42 22 16 59 18 4 76 -1 -64 22 36 -65 2 12 -63 59 46 -65 25 19 71 0 0 -64 37 0 16 59 18 5 75 -2 -64 17 11 -64 56 53 -63 54 17 -65 20 3 72 0 0 -64 31 19 16 59 17 5 74 -2 -64 11 27 -64 51 15 -63 48 30 -65 14 28 73 0 0 -64 25 19 16 59 16 6 73 -2 -64 5 24 -64 45 19 -63 42 23 -65 8 36 74 0 0 -64 19 0 16 59 16 6 72 -2 -63 59 2 -64 39 3 -63 35 57 -65 2 24 75 0 0 -64 12 22 16 59 15 7 71 -3 -63 52 20 -64 32 28 -63 29 11 -64 55 53 76 0 0 -64 5 24 16 59 14 7 70 -3 -63 45 19 -64 25 34 -63 22 6 -64 49 3 77 0 0 -63 58 6 16 59 13 7 70 -3 -63 37 57 -64 18 20 -63 14 40 -64 41 54 78 0 0 -63 50 29 16 59 12 8 69 -4 -63 30 16 -64 10 46 -63 6 54 -64 34 25 79 0 0 -63 42 31 16 59 11 8 68 -4 -63 22 14 -64 2 53 -62 58 48 -64 26 36 80 0 0 -63 34 12 16 59 10 9 67 -4 -63 13 51 -63 54 38 -62 50 20 -64 18 26 81 0 0 -63 25 33 16 59 9 9 66 -4 -63 5 8 -63 46 3 -62 41 32 -64 9 56 82 0 0 -63 16 33 16 59 7 10 65 -5 -62 56 3 -63 37 7 -62 32 22 -64 1 6 83 0 0 -63 7 11 16 59 6 10 64 -5 -62 46 37 -63 27 50 -62 22 51 -63 51 54 84 0 0 -62 57 28 16 59 5 11 63 -5 -62 36 49 -63 18 11 -62 12 57 -63 42 21 85 0 0 -62 47 22 16 59 3 11 62 -6 -62 26 38 -63 8 11 -62 2 42 -63 32 26 86 0 0 -62 36 54 16 59 1 12 62 -6 -62 16 6 -62 57 48 -61 52 3 -63 22 9 87 0 0 -62 26 4 16 59 0 12 61 -6 -62 5 10 -62 47 3 -61 41 2 -63 11 29 88 0 0 -62 14 50 16 58 58 13 60 -6 -61 53 52 -62 35 54 -61 29 38 -63 0 27 89 0 0 -62 3 14 16 58 56 13 59 -7 -61 42 10 -62 24 23 -61 17 50 -62 49 2 90 0 0 -61 51 13 16 58 54 14 58 -7 -61 30 4 -62 12 28 -61 5 38 -62 37 13 91 0 0 -61 38 49 16 58 52 14 57 -7 -61 17 34 -62 0 9 -60 53 2 -62 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45 -11 -57 36 55 -58 22 20 -57 10 47 -58 48 52 106 0 0 -57 40 24 16 58 8 22 44 -12 -57 17 39 -58 3 16 -56 51 23 -58 29 56 107 0 0 -57 20 44 16 58 4 23 43 -12 -56 57 53 -57 43 42 -56 31 30 -58 10 30 108 0 0 -57 0 34 16 58 0 24 42 -12 -56 37 36 -57 23 39 -56 11 6 -57 50 34 109 0 0 -56 39 53 16 57 55 24 41 -13 -56 16 49 -57 3 4 -55 50 12 -57 30 6 110 0 0 -56 18 41 16 57 51 25 40 -13 -55 55 31 -56 41 58 -55 28 46 -57 9 8 111 0 0 -55 56 58 16 57 46 26 39 -13 -55 33 41 -56 20 21 -55 6 50 -56 47 39 112 0 0 -55 34 43 16 57 41 26 38 -13 -55 11 20 -55 58 13 -54 44 22 -56 25 38 113 0 0 -55 11 56 16 57 36 27 37 -14 -54 48 28 -55 35 33 -54 21 22 -56 3 5 114 0 0 -54 48 38 16 57 31 27 36 -14 -54 25 3 -55 12 20 -53 57 51 -55 40 0 115 0 0 -54 24 47 16 57 26 28 36 -14 -54 1 7 -54 48 36 -53 33 48 -55 16 22 116 0 0 -54 0 24 16 57 20 29 35 -15 -53 36 38 -54 24 18 -53 9 12 -54 52 12 117 0 0 -53 35 29 16 57 15 29 34 -15 -53 11 36 -53 59 29 -52 44 4 -54 27 29 118 0 0 -53 10 0 16 57 9 30 33 -15 -52 46 2 -53 34 6 -52 18 24 -54 2 13 119 0 0 -52 43 59 16 57 2 31 32 -15 -52 19 56 -53 8 11 -51 52 12 -53 36 25 120 0 0 -52 17 26 16 56 56 31 31 -16 -51 53 17 -52 41 43 -51 25 27 -53 10 3 121 0 0 -51 50 19 16 56 49 32 30 -16 -51 26 6 -52 14 42 -50 58 9 -52 43 8 122 0 0 -51 22 40 16 56 43 33 29 -16 -50 58 22 -51 47 8 -50 30 19 -52 15 40 123 0 0 -50 54 29 16 56 36 34 28 -16 -50 30 5 -51 19 1 -50 1 57 -51 47 39 124 0 0 -50 25 45 16 56 28 34 27 -17 -50 1 16 -50 50 21 -49 33 3 -51 19 5 125 0 0 -49 56 28 16 56 21 35 26 -17 -49 31 55 -50 21 9 -49 3 38 -50 49 59 126 0 0 -49 26 40 16 56 13 36 25 -17 -49 2 3 -49 51 25 -48 33 40 -50 20 19 127 0 0 -48 56 19 16 56 5 36 24 -17 -48 31 38 -49 21 9 -48 3 11 -49 50 8 128 0 0 -48 25 28 16 55 57 37 23 -17 -48 0 43 -48 50 21 -47 32 11 -49 19 25 129 0 0 -47 54 5 16 55 49 38 22 -18 -47 29 17 -48 19 2 -47 0 41 -48 48 9 130 0 0 -47 22 11 16 55 40 39 21 -18 -46 57 20 -47 47 11 -46 28 41 -48 16 23 131 0 0 -46 49 47 16 55 31 39 20 -18 -46 24 53 -47 14 51 -45 56 10 -47 44 6 132 0 0 -46 16 54 16 55 22 40 19 -18 -45 51 57 -46 42 0 -45 23 11 -47 11 19 133 0 0 -45 43 31 16 55 13 41 18 -18 -45 18 32 -46 8 40 -44 49 43 -46 38 2 134 0 0 -45 9 40 16 55 3 42 17 -18 -44 44 39 -45 34 51 -44 15 48 -46 4 16 135 0 0 -44 35 22 16 54 53 42 16 -19 -44 10 18 -45 0 35 -43 41 25 -45 30 1 136 0 0 -44 0 36 16 54 43 43 14 -19 -43 35 31 -44 25 51 -43 6 36 -44 55 19 137 0 0 -43 25 25 16 54 33 44 13 -19 -43 0 18 -43 50 40 -42 31 22 -44 20 11 138 0 0 -42 49 48 16 54 22 44 12 -19 -42 24 40 -43 15 4 -41 55 43 -43 44 36 139 0 0 -42 13 46 16 54 11 45 11 -19 -41 48 38 -42 39 4 -41 19 40 -43 8 36 140 0 0 -41 37 21 16 54 0 46 10 -19 -41 12 13 -42 2 39 -40 43 14 -42 32 12 141 0 0 -41 0 34 16 53 49 47 8 -19 -40 35 26 -41 25 52 -40 6 27 -41 55 25 142 0 0 -40 23 26 16 53 37 47 7 -19 -39 58 17 -40 48 44 -39 29 18 -41 18 17 143 0 0 -39 45 57 16 53 25 48 6 -19 -39 20 49 -40 11 15 -38 51 51 -40 40 47 144 0 0 -39 8 9 16 53 13 49 4 -19 -38 43 2 -39 33 26 -38 14 4 -40 2 57 145 0 0 -38 30 3 16 53 1 49 3 -19 -38 4 57 -38 55 19 -37 36 1 -39 24 49 146 0 0 -37 51 41 16 52 49 50 2 -19 -37 26 36 -38 16 55 -36 57 41 -38 46 24 147 0 0 -37 13 3 16 52 36 51 0 -19 -36 47 59 -37 38 16 -36 19 7 -38 7 42 148 0 0 -36 34 11 16 52 23 51 359 -19 -36 9 9 -36 59 21 -35 40 18 -37 28 46 149 0 0 -35 55 6 16 52 10 52 357 -19 -35 30 6 -36 20 14 -35 1 18 -36 49 36 150 0 0 -35 15 49 16 51 57 53 355 -19 -34 50 52 -35 40 55 -34 22 6 -36 10 14 151 0 0 -34 36 22 16 51 43 53 354 -19 -34 11 28 -35 1 25 -33 42 45 -35 30 41 152 0 0 -33 56 46 16 51 29 54 352 -19 -33 31 55 -34 21 47 -33 3 15 -34 50 59 153 0 0 -33 17 3 16 51 16 54 350 -19 -32 52 15 -33 42 0 -32 23 39 -34 11 8 154 0 0 -32 37 14 16 51 2 55 348 -18 -32 12 29 -33 2 7 -31 43 57 -33 31 12 155 0 0 -31 57 19 16 50 48 55 347 -18 -31 32 38 -32 22 10 -31 4 10 -32 51 10 156 0 0 -31 17 22 16 50 33 56 345 -18 -30 52 44 -31 42 8 -30 24 21 -32 11 4 157 0 0 -30 37 22 16 50 19 56 343 -18 -30 12 49 -31 2 5 -29 44 30 -31 30 55 158 0 0 -29 57 22 16 50 4 57 341 -18 -29 32 53 -30 22 1 -29 4 38 -30 50 46 159 0 0 -29 17 23 16 49 50 57 339 -17 -28 52 58 -29 41 57 -28 24 48 -30 10 37 160 0 0 -28 37 26 16 49 35 57 337 -17 -28 13 5 -29 1 55 -27 45 1 -29 30 30 161 0 0 -27 57 33 16 49 20 57 335 -17 -27 33 16 -28 21 57 -27 5 17 -28 50 26 162 0 0 -27 17 44 16 49 5 58 333 -17 -26 53 33 -27 42 4 -26 25 39 -28 10 27 163 0 0 -26 38 2 16 48 50 58 331 -16 -26 13 55 -27 2 16 -25 46 7 -27 30 34 164 0 0 -25 58 27 16 48 35 58 329 -16 -25 34 25 -26 22 36 -25 6 43 -26 50 48 165 0 0 -25 19 1 16 48 20 58 327 -16 -24 55 4 -25 43 5 -24 27 28 -26 11 10 166 0 0 -24 39 45 16 48 5 58 324 -15 -24 15 54 -25 3 43 -23 48 23 -25 31 42 167 0 0 -24 0 40 16 47 50 58 322 -15 -23 36 54 -24 24 33 -23 9 30 -24 52 26 168 0 0 -23 21 48 16 47 34 58 320 -14 -22 58 7 -23 45 36 -22 30 49 -24 13 22 169 0 0 -22 43 9 16 47 19 58 318 -14 -22 19 34 -23 6 52 -21 52 22 -23 34 31 170 0 0 -22 4 46 16 47 4 58 316 -14 -21 41 17 -22 28 22 -21 14 11 -22 55 55 171 0 0 -21 26 38 16 46 49 58 314 -13 -21 3 15 -21 50 9 -20 36 15 -22 17 35 172 0 0 -20 48 48 16 46 34 58 312 -13 -20 25 30 -21 12 13 -19 58 37 -21 39 32 173 0 0 -20 11 16 16 46 19 57 310 -12 -19 48 3 -20 34 35 -19 21 17 -21 1 47 174 0 0 -19 34 3 16 46 4 57 308 -12 -19 10 56 -19 57 16 -18 44 16 -20 24 21 175 0 0 -18 57 10 16 45 49 57 306 -11 -18 34 9 -19 20 17 -18 7 36 -19 47 16 176 0 0 -18 20 38 16 45 34 56 304 -11 -17 57 43 -18 43 40 -17 31 16 -19 10 32 177 0 0 -17 44 29 16 45 19 56 303 -10 -17 21 39 -18 7 25 -16 55 19 -18 34 9 178 0 0 -17 8 42 16 45 4 55 301 -9 -16 45 59 -17 31 32 -16 19 45 -17 58 10 179 0 0 -16 33 20 16 44 49 55 299 -9 -16 10 42 -16 56 4 -15 44 35 -17 22 35 180 0 0 -15 58 22 16 44 35 54 298 -8 -15 35 50 -16 21 0 -15 9 49 -16 47 24 -179 0 0 -15 23 50 16 44 20 54 296 -8 -15 1 23 -15 46 22 -14 35 29 -16 12 39 -178 0 0 -14 49 44 16 44 6 53 295 -7 -14 27 23 -15 12 10 -14 1 36 -15 38 21 -177 0 0 -14 16 5 16 43 52 53 293 -7 -13 53 50 -14 38 26 -13 28 9 -15 4 29 -176 0 0 -13 42 54 16 43 38 52 292 -6 -13 20 44 -14 5 9 -12 55 10 -14 31 6 -175 0 0 -13 10 11 16 43 24 51 291 -5 -12 48 7 -13 32 21 -12 22 39 -13 58 11 -174 0 0 -12 37 57 16 43 10 51 289 -5 -12 15 59 -13 0 1 -11 50 37 -13 25 45 -173 0 0 -12 6 13 16 42 56 50 288 -4 -11 44 21 -12 28 12 -11 19 5 -12 53 49 -172 0 0 -11 35 0 16 42 43 49 287 -3 -11 13 12 -11 56 53 -10 48 3 -12 22 23 -171 0 0 -11 4 17 16 42 30 49 286 -3 -10 42 35 -11 26 4 -10 17 32 -11 51 28 -170 0 0 -10 34 5 16 42 16 48 285 -2 -10 12 29 -10 55 47 - 9 47 32 -11 21 5 -169 0 0 -10 4 26 16 42 4 47 284 -1 - 9 42 54 -10 26 3 - 9 18 3 -10 51 14 -168 0 0 - 9 35 18 16 41 51 46 283 -1 - 9 13 52 - 9 56 50 - 8 49 7 -10 21 55 Uncertainty in time = +/- 5 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 0153-01137-1 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 56 08.8140 DE: +02 07 56.878 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .021, .018 ) * V mag [mag]: 10.9 * B mag [mag]: 11.3 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (218) Bianca approx. diameter [km]: 61 approx. diameter ["]: .040 distance from Earth [AU]: 2.12800 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 978 number of rejected observations: 103 time covered by the observations: 1901 Jun 08 - 2012 Nov 08 1 sigma uncertainty ellipse (major, minor, PA): 0.018, 0.010, 89° remarks: * orbital elements for (218) Bianca : Mean anomaly = 226.39084890 deg Arg. of pericenter = 62.54766603 deg Long. of node = 170.68184420 deg Inclination = 15.19390821 deg Eccentricity = 0.11598859 Semimajor axis = 2.66876545 AU Perihelion dist = 2.35921912 AU Mag: H = 8.60, G = 0.32 Epoch of elements : MJD 56255.70000000 TDT (2012 Nov 24.700) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 24 218 Bianca 16h 47.9m UT 10.9 6 56 8.814 2 7 56.88TYC 0153-01137-1 11.3 13.2 61 7.7 2.128 -1.023 -10.11 148.0134 2.135 -75.25 -20.72 16.7985 0.28927 -0.43944 -3.70444 -2.44589 -0.00379 0.00194 2000 225.10226320121119.00000 62.547666170.681844 15.1939080.11598859 2.6687655 2.3592191 8.6 5.00.32 RATE 2.2606770 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.028 0.021 90 1.58 0.023 0 0 0-2 056247.0020121124_1137-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 08:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org