IOTA/IOTA-ES occultation update for (1473) Ounas / TYC 5211-00437-1 event on 2012 Nov 08, 12:57 UT Visible from N Australia Summary ------- On 2012 Nov 08 UT, the 17 km diameter asteroid (1473) Ounas will occult a 9.4 mag star in the constellation Aquarius for observers along a path across N Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.0 mag to 15.4 mag (the magnitude of the asteroid) for at most 1.1 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: 38 * date and approx. time of event: 2012 Nov 08, 12:56 - 2012 Nov 08, 13:04 UT * geocentric midpoint of event [JD]: 2456240.0403125 * magnitude of target star: 9.4 * magnitude drop [mag]: 6.0 * estimated maximum duration [s]: 1.1 * Moon: 34 % sunlit, 172° distance * Sun: 103° distance * rough path description: N Australia The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 1.72 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .027", 82° ) * approx speed of asteroid's shadow [km/s]: 16.2003 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5211-00437-1 by 1473 Ounas on 2012 Nov 8 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 75 0 0 -10 34 33 12 56 58 75 50 0 -10 39 18 -10 29 47 -10 55 42 -10 13 24 76 0 0 -10 44 19 12 57 5 76 47 -1 -10 49 5 -10 39 33 -11 5 28 -10 23 10 77 0 0 -10 54 5 12 57 12 77 43 -2 -10 58 51 -10 49 19 -11 15 15 -10 32 57 78 0 0 -11 3 52 12 57 19 77 39 -3 -11 8 38 -10 59 6 -11 25 1 -10 42 44 79 0 0 -11 13 38 12 57 26 78 35 -4 -11 18 24 -11 8 53 -11 34 48 -10 52 30 80 0 0 -11 23 25 12 57 33 78 30 -5 -11 28 10 -11 18 39 -11 44 34 -11 2 16 81 0 0 -11 33 11 12 57 40 78 25 -6 -11 37 56 -11 28 25 -11 54 20 -11 12 2 82 0 0 -11 42 56 12 57 47 79 20 -6 -11 47 42 -11 38 10 -12 4 5 -11 21 48 83 0 0 -11 52 40 12 57 54 79 15 -7 -11 57 26 -11 47 54 -12 13 50 -11 31 32 84 0 0 -12 2 23 12 58 1 79 9 -8 -12 7 9 -11 57 38 -12 23 33 -11 41 16 85 0 0 -12 12 6 12 58 8 79 4 -9 -12 16 51 -12 7 20 -12 33 15 -11 50 58 86 0 0 -12 21 46 12 58 15 79 359 -10 -12 26 32 -12 17 1 -12 42 55 -12 0 38 87 0 0 -12 31 25 12 58 22 78 353 -11 -12 36 11 -12 26 40 -12 52 34 -12 10 18 88 0 0 -12 41 2 12 58 29 78 349 -12 -12 45 48 -12 36 17 -13 2 11 -12 19 55 89 0 0 -12 50 37 12 58 36 78 344 -13 -12 55 23 -12 45 52 -13 11 46 -12 29 30 90 0 0 -13 0 10 12 58 43 77 340 -14 -13 4 56 -12 55 25 -13 21 19 -12 39 3 91 0 0 -13 9 40 12 58 50 77 336 -14 -13 14 26 -13 4 55 -13 30 49 -12 48 33 92 0 0 -13 19 8 12 58 56 76 332 -15 -13 23 54 -13 14 23 -13 40 17 -12 58 1 93 0 0 -13 28 33 12 59 3 76 328 -16 -13 33 19 -13 23 48 -13 49 41 -13 7 26 94 0 0 -13 37 55 12 59 10 75 325 -17 -13 42 40 -13 33 10 -13 59 3 -13 16 48 95 0 0 -13 47 14 12 59 17 74 323 -18 -13 51 59 -13 42 28 -14 8 21 -13 26 7 96 0 0 -13 56 29 12 59 24 73 320 -19 -14 1 14 -13 51 44 -14 17 37 -13 35 23 97 0 0 -14 5 41 12 59 31 73 318 -20 -14 10 26 -14 0 55 -14 26 48 -13 44 35 98 0 0 -14 14 49 12 59 37 72 315 -20 -14 19 34 -14 10 3 -14 35 56 -13 53 43 99 0 0 -14 23 53 12 59 44 71 313 -21 -14 28 38 -14 19 7 -14 45 0 -14 2 47 100 0 0 -14 32 53 12 59 51 70 312 -22 -14 37 38 -14 28 7 -14 53 59 -14 11 47 101 0 0 -14 41 48 12 59 57 69 310 -23 -14 46 33 -14 37 3 -15 2 55 -14 20 43 102 0 0 -14 50 39 13 0 4 68 308 -24 -14 55 24 -14 45 54 -15 11 46 -14 29 35 103 0 0 -14 59 26 13 0 10 68 307 -25 -15 4 11 -14 54 41 -15 20 32 -14 38 21 104 0 0 -15 8 8 13 0 17 67 305 -25 -15 12 53 -15 3 23 -15 29 13 -14 47 3 105 0 0 -15 16 44 13 0 23 66 304 -26 -15 21 29 -15 12 0 -15 37 50 -14 55 40 106 0 0 -15 25 16 13 0 30 65 303 -27 -15 30 1 -15 20 31 -15 46 21 -15 4 12 107 0 0 -15 33 42 13 0 36 64 302 -28 -15 38 27 -15 28 58 -15 54 47 -15 12 39 108 0 0 -15 42 3 13 0 42 63 301 -29 -15 46 48 -15 37 19 -16 3 8 -15 21 0 109 0 0 -15 50 19 13 0 48 62 300 -29 -15 55 3 -15 45 34 -16 11 23 -15 29 16 110 0 0 -15 58 28 13 0 55 61 299 -30 -16 3 13 -15 53 44 -16 19 33 -15 37 26 111 0 0 -16 6 32 13 1 1 60 298 -31 -16 11 17 -16 1 48 -16 27 36 -15 45 30 112 0 0 -16 14 30 13 1 7 59 297 -32 -16 19 14 -16 9 46 -16 35 33 -15 53 28 113 0 0 -16 22 22 13 1 13 58 296 -33 -16 27 6 -16 17 37 -16 43 25 -16 1 20 114 0 0 -16 30 7 13 1 18 58 295 -33 -16 34 51 -16 25 23 -16 51 10 -16 9 5 115 0 0 -16 37 46 13 1 24 57 295 -34 -16 42 30 -16 33 1 -16 58 48 -16 16 45 116 0 0 -16 45 18 13 1 30 56 294 -35 -16 50 2 -16 40 34 -17 6 20 -16 24 17 117 0 0 -16 52 43 13 1 36 55 293 -36 -16 57 27 -16 47 59 -17 13 45 -16 31 43 118 0 0 -17 0 2 13 1 41 54 292 -36 -17 4 46 -16 55 18 -17 21 4 -16 39 2 119 0 0 -17 7 14 13 1 47 53 292 -37 -17 11 58 -17 2 30 -17 28 15 -16 46 14 120 0 0 -17 14 18 13 1 52 52 291 -38 -17 19 2 -17 9 35 -17 35 19 -16 53 19 121 0 0 -17 21 16 13 1 58 51 291 -38 -17 26 0 -17 16 32 -17 42 16 -17 0 17 122 0 0 -17 28 6 13 2 3 50 290 -39 -17 32 50 -17 23 22 -17 49 6 -17 7 7 123 0 0 -17 34 49 13 2 8 49 289 -40 -17 39 32 -17 30 5 -17 55 49 -17 13 50 124 0 0 -17 41 24 13 2 13 48 289 -40 -17 46 7 -17 36 40 -18 2 24 -17 20 26 125 0 0 -17 47 51 13 2 18 47 288 -41 -17 52 35 -17 43 8 -18 8 51 -17 26 54 126 0 0 -17 54 11 13 2 23 46 288 -42 -17 58 55 -17 49 28 -18 15 10 -17 33 14 127 0 0 -18 0 23 13 2 28 45 287 -42 -18 5 7 -17 55 40 -18 21 22 -17 39 26 128 0 0 -18 6 27 13 2 33 44 287 -43 -18 11 11 -18 1 44 -18 27 26 -17 45 30 129 0 0 -18 12 23 13 2 38 43 286 -43 -18 17 7 -18 7 40 -18 33 22 -17 51 27 130 0 0 -18 18 11 13 2 42 42 286 -44 -18 22 55 -18 13 28 -18 39 9 -17 57 15 131 0 0 -18 23 51 13 2 47 41 285 -45 -18 28 34 -18 19 8 -18 44 49 -18 2 55 132 0 0 -18 29 23 13 2 51 40 285 -45 -18 34 6 -18 24 40 -18 50 20 -18 8 27 133 0 0 -18 34 46 13 2 56 39 284 -46 -18 39 29 -18 30 3 -18 55 43 -18 13 50 134 0 0 -18 40 0 13 3 0 38 284 -46 -18 44 43 -18 35 17 -19 0 57 -18 19 5 135 0 0 -18 45 6 13 3 4 37 284 -47 -18 49 49 -18 40 24 -19 6 3 -18 24 12 136 0 0 -18 50 4 13 3 8 37 283 -47 -18 54 47 -18 45 21 -19 11 0 -18 29 9 137 0 0 -18 54 53 13 3 12 36 283 -48 -18 59 36 -18 50 10 -19 15 49 -18 33 59 138 0 0 -18 59 33 13 3 16 35 282 -48 -19 4 16 -18 54 51 -19 20 29 -18 38 39 139 0 0 -19 4 5 13 3 20 34 282 -49 -19 8 47 -18 59 22 -19 25 0 -18 43 11 140 0 0 -19 8 27 13 3 24 33 281 -49 -19 13 10 -19 3 45 -19 29 22 -18 47 33 141 0 0 -19 12 41 13 3 27 32 281 -49 -19 17 23 -19 7 58 -19 33 36 -18 51 47 142 0 0 -19 16 46 13 3 31 31 281 -50 -19 21 28 -19 12 3 -19 37 40 -18 55 52 143 0 0 -19 20 41 13 3 34 30 280 -50 -19 25 24 -19 15 59 -19 41 36 -18 59 48 144 0 0 -19 24 28 13 3 37 29 280 -51 -19 29 10 -19 19 46 -19 45 22 -19 3 35 145 0 0 -19 28 5 13 3 40 28 279 -51 -19 32 48 -19 23 23 -19 48 59 -19 7 13 146 0 0 -19 31 34 13 3 44 27 279 -51 -19 36 16 -19 26 52 -19 52 28 -19 10 42 147 0 0 -19 34 53 13 3 47 26 279 -52 -19 39 35 -19 30 11 -19 55 47 -19 14 1 148 0 0 -19 38 3 13 3 49 25 278 -52 -19 42 45 -19 33 21 -19 58 57 -19 17 11 149 0 0 -19 41 4 13 3 52 24 278 -52 -19 45 46 -19 36 22 -20 1 57 -19 20 12 150 0 0 -19 43 55 13 3 55 23 278 -52 -19 48 38 -19 39 13 -20 4 49 -19 23 4 151 0 0 -19 46 38 13 3 57 22 277 -52 -19 51 20 -19 41 56 -20 7 31 -19 25 46 152 0 0 -19 49 10 13 4 0 21 277 -53 -19 53 52 -19 44 28 -20 10 3 -19 28 19 153 0 0 -19 51 34 13 4 2 20 276 -53 -19 56 16 -19 46 52 -20 12 27 -19 30 43 154 0 0 -19 53 48 13 4 5 19 276 -53 -19 58 30 -19 49 6 -20 14 40 -19 32 57 155 0 0 -19 55 53 13 4 7 18 276 -53 -20 0 34 -19 51 11 -20 16 45 -19 35 2 156 0 0 -19 57 48 13 4 9 17 275 -53 -20 2 30 -19 53 6 -20 18 40 -19 36 57 157 0 0 -19 59 33 13 4 11 17 275 -53 -20 4 15 -19 54 52 -20 20 26 -19 38 43 158 0 0 -20 1 10 13 4 13 16 275 -53 -20 5 52 -19 56 28 -20 22 2 -19 40 19 159 0 0 -20 2 37 13 4 14 15 274 -53 -20 7 18 -19 57 55 -20 23 29 -19 41 46 160 0 0 -20 3 54 13 4 16 14 274 -53 -20 8 36 -19 59 12 -20 24 46 -19 43 3 161 0 0 -20 5 2 13 4 17 13 274 -53 -20 9 44 -20 0 20 -20 25 54 -19 44 11 162 0 0 -20 6 0 13 4 19 12 273 -53 -20 10 42 -20 1 18 -20 26 52 -19 45 10 163 0 0 -20 6 49 13 4 20 11 273 -53 -20 11 31 -20 2 7 -20 27 41 -19 45 59 164 0 0 -20 7 29 13 4 21 10 273 -53 -20 12 10 -20 2 47 -20 28 20 -19 46 38 165 0 0 -20 7 58 13 4 22 9 272 -53 -20 12 40 -20 3 17 -20 28 50 -19 47 8 166 0 0 -20 8 19 13 4 23 8 272 -53 -20 13 1 -20 3 37 -20 29 11 -19 47 29 167 0 0 -20 8 30 13 4 24 7 272 -53 -20 13 12 -20 3 48 -20 29 22 -19 47 39 168 0 0 -20 8 31 13 4 25 6 271 -52 -20 13 13 -20 3 50 -20 29 23 -19 47 41 169 0 0 -20 8 23 13 4 26 5 271 -52 -20 13 5 -20 3 42 -20 29 15 -19 47 33 170 0 0 -20 8 6 13 4 26 4 270 -52 -20 12 48 -20 3 24 -20 28 58 -19 47 16 171 0 0 -20 7 39 13 4 27 3 270 -52 -20 12 21 -20 2 58 -20 28 31 -19 46 49 172 0 0 -20 7 3 13 4 27 2 270 -51 -20 11 45 -20 2 21 -20 27 55 -19 46 13 173 0 0 -20 6 18 13 4 27 1 269 -51 -20 10 59 -20 1 36 -20 27 10 -19 45 27 174 0 0 -20 5 23 13 4 27 1 269 -51 -20 10 5 -20 0 41 -20 26 15 -19 44 32 Uncertainty in time = +/- 2 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 5211-00437-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 52 56.9464 DE: -01 05 12.599 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .021 ) * V mag [mag]: 9.4 * B mag [mag]: 11.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1473) Ounas approx. diameter [km]: 17 approx. diameter ["]: .016 distance from Earth [AU]: 1.49800 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1045 number of rejected observations: 32 time covered by the observations: 1938 Oct 22 - 2012 Sep 28 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.018, 75° remarks: * orbital elements for (1473) Ounas : Mean anomaly = 7.69555336 deg Arg. of pericenter = 129.23716816 deg Long. of node = 216.69503129 deg Inclination = 13.65021726 deg Eccentricity = 0.23520385 Semimajor axis = 2.57505045 AU Perihelion dist = 1.96938868 AU Mag: H = 11.72, G = 0.15 Epoch of elements : MJD 56239.54000000 TDT (2012 Nov 08.540) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 8 1473 Ounas 12h 58.1m UT 9.4 21 52 56.946- 1 5 12.60TYC 5211-00437-1 11.1 15.4 17 1.1 1.498 3.536 -8.27 85.6064 -1.085 -18.56 -16.78 12.9675 -0.02494 -0.19061 9.03436 -1.41106 0.00498 0.00157 2000 5.42006920121030.00000129.237168216.695031 13.6502170.23520385 2.5750505 1.969388711.8 5.00.15 RATE 2.3852030 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.027 82 2.72 0.027 0 0 4 1 056208.0020121108_0437-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 20:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org