IOTA/IOTA-ES occultation update for (349) Dembowska / TYC 1828-01487-1 event on 2012 Nov 30, 10:54 UT Visible from SE Australia Summary ------- On 2012 Nov 30 UT, the 165 km diameter asteroid (349) Dembowska will occult a 11.4 mag star in the constellation Taurus 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 0.2 mag to 9.6 mag (the magnitude of the asteroid) for at most 13.7 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: 99 * date and approx. time of event: 2012 Nov 30, 10:48 - 2012 Nov 30, 10:59 UT * geocentric midpoint of event [JD]: 2456261.95432917 * magnitude of target star: 11.4 * magnitude drop [mag]: 0.2 * estimated maximum duration [s]: 13.7 * Moon: 97 % sunlit, 21° distance * Sun: 172° distance * rough path description: SE Australia Additional comments ------------------- very small mag drop The occultation path -------------------- * approximate projected width [km]: 263 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 3.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .021", 86° ) * approx speed of asteroid's shadow [km/s]: 11.9790 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1828-01487-1 by 349 Dembowska on 2012 Nov 30 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 -108 12 11 -43 0 0 10 48 41 1 313 -7 ... .. .. -110 41 10 ... .. .. -111 32 50 -109 43 6 -42 0 0 10 48 41 2 314 -8 -107 17 55 -112 12 25 -106 29 25 -113 4 16 -111 15 30 -41 0 0 10 48 43 4 315 -10 -108 49 58 -113 45 28 -108 1 23 -114 37 35 -112 49 38 -40 0 0 10 48 44 5 316 -12 -110 23 27 -115 20 32 -109 34 43 -116 13 3 -114 25 43 -39 0 0 10 48 47 7 317 -13 -111 58 36 -116 57 53 -111 9 37 -117 50 56 -116 4 1 -38 0 0 10 48 50 8 318 -15 -113 35 40 -118 37 50 -112 46 19 -119 31 33 -117 44 51 -37 0 0 10 48 54 10 319 -16 -115 14 53 -120 20 44 -114 25 5 -121 15 16 -119 28 32 -36 0 0 10 48 58 12 320 -18 -116 56 33 -122 6 57 -116 6 10 -123 2 30 -121 15 27 -35 0 0 10 49 4 13 321 -20 -118 41 1 -123 56 59 -117 49 55 -124 53 46 -123 6 6 -34 0 0 10 49 10 15 322 -22 -120 28 40 -125 51 24 -119 36 41 -126 49 40 -125 0 59 -33 0 0 10 49 18 17 324 -23 -122 19 56 -127 50 51 -121 26 54 -128 50 58 -127 0 48 -32 0 0 10 49 26 19 325 -25 -124 15 22 -129 56 14 -123 21 3 -130 58 35 -129 6 22 -31 0 0 10 49 36 20 326 -27 -126 15 37 -132 8 37 -125 19 46 -133 13 45 Latitude Latitude Latitude Latitude -131 0 0 -30 8 17 10 49 46 22 327 -29 -28 48 36 -31 30 40 -28 22 4 -31 59 21 -132 0 0 -29 41 59 10 49 51 23 328 -30 -28 22 48 -31 3 48 -27 56 26 -31 32 17 -133 0 0 -29 16 22 10 49 57 24 329 -30 -27 57 41 -30 37 39 -27 31 28 -31 5 56 -134 0 0 -28 51 28 10 50 3 24 330 -31 -27 33 15 -30 12 13 -27 7 12 -30 40 19 -135 0 0 -28 27 16 10 50 8 25 330 -32 -27 9 31 -29 47 31 -26 43 36 -30 15 25 -136 0 0 -28 3 47 10 50 14 26 331 -33 -26 46 28 -29 23 32 -26 20 42 -29 51 16 -137 0 0 -27 41 0 10 50 21 27 332 -34 -26 24 7 -29 0 17 -25 58 29 -29 27 50 -138 0 0 -27 18 56 10 50 27 27 332 -34 -26 2 28 -28 37 46 -25 36 58 -29 5 9 -139 0 0 -26 57 34 10 50 33 28 333 -35 -25 41 30 -28 15 58 -25 16 8 -28 43 12 -140 0 0 -26 36 56 10 50 40 29 334 -36 -25 21 15 -27 54 54 -24 56 0 -28 21 59 -141 0 0 -26 17 0 10 50 47 29 335 -37 -25 1 41 -27 34 35 -24 36 34 -28 1 31 -142 0 0 -25 57 48 10 50 53 30 336 -37 -24 42 50 -27 14 59 -24 17 49 -27 41 47 -143 0 0 -25 39 19 10 51 0 31 336 -38 -24 24 41 -26 56 8 -23 59 47 -27 22 47 -144 0 0 -25 21 32 10 51 7 31 337 -39 -24 7 15 -26 38 0 -23 42 26 -27 4 32 -145 0 0 -25 4 29 10 51 15 32 338 -39 -23 50 30 -26 20 37 -23 25 48 -26 47 2 -146 0 0 -24 48 10 10 51 22 32 339 -40 -23 34 28 -26 3 58 -23 9 52 -26 30 15 -147 0 0 -24 32 33 10 51 29 33 340 -40 -23 19 9 -25 48 3 -22 54 37 -26 14 14 -148 0 0 -24 17 40 10 51 37 34 341 -41 -23 4 31 -25 32 52 -22 40 5 -25 58 57 -149 0 0 -24 3 30 10 51 44 34 342 -42 -22 50 36 -25 18 25 -22 26 15 -25 44 24 -150 0 0 -23 50 2 10 51 52 35 343 -42 -22 37 24 -25 4 42 -22 13 7 -25 30 35 -151 0 0 -23 37 19 10 51 59 35 343 -43 -22 24 53 -24 51 44 -22 0 41 -25 17 31 -152 0 0 -23 25 18 10 52 7 35 344 -43 -22 13 6 -24 39 29 -21 48 58 -25 5 12 -153 0 0 -23 14 0 10 52 15 36 345 -43 -22 2 0 -24 27 59 -21 37 56 -24 53 37 -154 0 0 -23 3 26 10 52 23 36 346 -44 -21 51 37 -24 17 12 -21 27 36 -24 42 46 -155 0 0 -22 53 35 10 52 31 37 347 -44 -21 41 56 -24 7 9 -21 17 59 -24 32 39 -156 0 0 -22 44 26 10 52 39 37 348 -45 -21 32 57 -23 57 51 -21 9 3 -24 23 17 -157 0 0 -22 36 1 10 52 47 37 349 -45 -21 24 41 -23 49 16 -21 0 50 -24 14 38 -158 0 0 -22 28 19 10 52 55 38 350 -45 -21 17 7 -23 41 25 -20 53 19 -24 6 44 -159 0 0 -22 21 20 10 53 3 38 351 -45 -21 10 15 -23 34 18 -20 46 29 -23 59 34 -160 0 0 -22 15 4 10 53 12 38 352 -46 -21 4 6 -23 27 55 -20 40 22 -23 53 9 -161 0 0 -22 9 31 10 53 20 38 354 -46 -20 58 38 -23 22 15 -20 34 56 -23 47 27 -162 0 0 -22 4 41 10 53 28 38 355 -46 -20 53 53 -23 17 20 -20 30 13 -23 42 29 -163 0 0 -22 0 33 10 53 36 39 356 -46 -20 49 50 -23 13 8 -20 26 11 -23 38 16 -164 0 0 -21 57 9 10 53 45 39 357 -46 -20 46 29 -23 9 40 -20 22 51 -23 34 46 -165 0 0 -21 54 28 10 53 53 39 358 -46 -20 43 51 -23 6 55 -20 20 14 -23 32 1 -166 0 0 -21 52 29 10 54 1 39 359 -46 -20 41 54 -23 4 55 -20 18 18 -23 29 59 -167 0 0 -21 51 13 10 54 10 39 360 -47 -20 40 40 -23 3 38 -20 17 4 -23 28 42 -168 0 0 -21 50 41 10 54 18 39 1 -46 -20 40 8 -23 3 4 -20 16 32 -23 28 8 -169 0 0 -21 50 51 10 54 26 39 2 -46 -20 40 18 -23 3 15 -20 16 42 -23 28 19 -170 0 0 -21 51 44 10 54 35 39 3 -46 -20 41 10 -23 4 9 -20 17 34 -23 29 13 -171 0 0 -21 53 20 10 54 43 39 4 -46 -20 42 44 -23 5 47 -20 19 7 -23 30 52 -172 0 0 -21 55 39 10 54 51 39 5 -46 -20 45 1 -23 8 8 -20 21 23 -23 33 14 -173 0 0 -21 58 41 10 54 59 38 6 -46 -20 47 59 -23 11 14 -20 24 21 -23 36 21 -174 0 0 -22 2 26 10 55 8 38 7 -46 -20 51 40 -23 15 3 -20 28 0 -23 40 11 -175 0 0 -22 6 53 10 55 16 38 9 -45 -20 56 3 -23 19 35 -20 32 22 -23 44 46 -176 0 0 -22 12 4 10 55 24 38 10 -45 -21 1 9 -23 24 52 -20 37 25 -23 50 5 -177 0 0 -22 17 58 10 55 32 38 11 -45 -21 6 56 -23 30 53 -20 43 11 -23 56 8 -178 0 0 -22 24 35 10 55 40 37 12 -45 -21 13 26 -23 37 37 -20 49 38 -24 2 55 -179 0 0 -22 31 54 10 55 48 37 13 -44 -21 20 38 -23 45 5 -20 56 48 -24 10 26 -180 0 0 -22 39 57 10 55 56 37 14 -44 -21 28 32 -23 53 17 -21 4 40 -24 18 41 179 0 0 -22 48 43 10 56 4 36 15 -43 -21 37 9 -24 2 13 -21 13 13 -24 27 41 178 0 0 -22 58 12 10 56 12 36 16 -43 -21 46 28 -24 11 53 -21 22 29 -24 37 25 177 0 0 -23 8 24 10 56 20 36 17 -43 -21 56 29 -24 22 17 -21 32 27 -24 47 53 176 0 0 -23 19 20 10 56 28 35 18 -42 -22 7 13 -24 33 25 -21 43 7 -24 59 6 175 0 0 -23 30 58 10 56 36 35 18 -42 -22 18 39 -24 45 17 -21 54 29 -25 11 3 174 0 0 -23 43 20 10 56 43 34 19 -41 -22 30 48 -24 57 53 -22 6 33 -25 23 44 173 0 0 -23 56 25 10 56 51 34 20 -40 -22 43 39 -25 11 14 -22 19 20 -25 37 10 172 0 0 -24 10 14 10 56 58 33 21 -40 -22 57 12 -25 25 18 -22 32 48 -25 51 20 171 0 0 -24 24 45 10 57 6 33 22 -39 -23 11 28 -25 40 7 -22 46 59 -26 6 15 170 0 0 -24 40 0 10 57 13 32 23 -39 -23 26 26 -25 55 40 -23 1 52 -26 21 54 169 0 0 -24 55 58 10 57 20 31 24 -38 -23 42 7 -26 11 57 -23 17 27 -26 38 18 168 0 0 -25 12 40 10 57 27 31 25 -37 -23 58 30 -26 28 58 -23 33 44 -26 55 27 167 0 0 -25 30 4 10 57 34 30 25 -37 -24 15 36 -26 46 44 -23 50 44 -27 13 20 166 0 0 -25 48 12 10 57 41 29 26 -36 -24 33 24 -27 5 13 -24 8 25 -27 31 57 165 0 0 -26 7 3 10 57 47 29 27 -35 -24 51 54 -27 24 27 -24 26 49 -27 51 20 164 0 0 -26 26 38 10 57 54 28 28 -34 -25 11 7 -27 44 25 -24 45 55 -28 11 26 163 0 0 -26 46 55 10 58 0 27 28 -34 -25 31 1 -28 5 8 -25 5 42 -28 32 18 162 0 0 -27 7 56 10 58 7 27 29 -33 -25 51 38 -28 26 34 -25 26 12 -28 53 53 161 0 0 -27 29 39 10 58 13 26 30 -32 -26 12 58 -28 48 44 -25 47 23 -29 16 13 160 0 0 -27 52 6 10 58 19 25 31 -31 -26 34 59 -29 11 39 -26 9 16 -29 39 18 159 0 0 -28 15 15 10 58 25 24 31 -31 -26 57 42 -29 35 17 -26 31 50 -30 3 6 158 0 0 -28 39 7 10 58 30 24 32 -30 -27 21 6 -29 59 39 -26 55 6 -30 27 39 157 0 0 -29 3 41 10 58 36 23 33 -29 -27 45 12 -30 24 44 -27 19 4 -30 52 56 156 0 0 -29 28 58 10 58 41 22 33 -28 -28 10 0 -30 50 33 -27 43 42 -31 18 57 155 0 0 -29 54 57 10 58 47 21 34 -27 -28 35 29 -31 17 5 -28 9 1 -31 45 41 154 0 0 -30 21 37 10 58 52 20 35 -26 -29 1 38 -31 44 20 -28 35 1 -32 13 8 153 0 0 -30 49 0 10 58 56 19 35 -25 -29 28 29 -32 12 18 -29 1 41 -32 41 19 152 0 0 -31 17 4 10 59 1 19 36 -24 -29 55 59 -32 40 58 -29 29 1 -33 10 13 151 0 0 -31 45 48 10 59 5 18 37 -24 -30 24 10 -33 10 21 -29 57 1 -33 39 49 150 0 0 -32 15 14 10 59 10 17 37 -23 -30 53 1 -33 40 25 -30 25 40 -34 10 8 149 0 0 -32 45 20 10 59 14 16 38 -22 -31 22 30 -34 11 11 -30 54 59 -34 41 8 148 0 0 -33 16 5 10 59 18 15 39 -21 -31 52 39 -34 42 38 -31 24 55 -35 12 50 147 0 0 -33 47 30 10 59 21 14 39 -20 -32 23 26 -35 14 45 -31 55 30 -35 45 13 146 0 0 -34 19 34 10 59 25 13 40 -19 -32 54 51 -35 47 32 -32 26 43 -36 18 16 145 0 0 -34 52 16 10 59 28 12 40 -18 -33 26 53 -36 20 59 -32 58 32 -36 51 59 144 0 0 -35 25 35 10 59 31 11 41 -17 -33 59 32 -36 55 4 -33 30 58 -37 26 21 143 0 0 -35 59 32 10 59 33 10 42 -16 -34 32 46 -37 29 47 -34 4 0 -38 1 22 142 0 0 -36 34 5 10 59 36 9 42 -15 -35 6 37 -38 5 8 -34 37 36 -38 37 1 141 0 0 -37 9 13 10 59 38 8 43 -14 -35 41 1 -38 41 5 -35 11 47 -39 13 16 140 0 0 -37 44 55 10 59 40 7 44 -13 -36 15 59 -39 17 38 -35 46 31 -39 50 8 139 0 0 -38 21 11 10 59 42 6 44 -12 -36 51 30 -39 54 46 -36 21 48 -40 27 34 138 0 0 -38 58 0 10 59 43 5 45 -11 -37 27 33 -40 32 27 -36 57 36 -41 5 35 137 0 0 -39 35 21 10 59 45 4 45 -10 -38 4 6 -41 10 41 -37 33 55 -41 44 9 136 0 0 -40 13 11 10 59 46 4 46 -9 -38 41 9 -41 49 26 -38 10 43 -42 23 14 135 0 0 -40 51 31 10 59 46 3 47 -8 -39 18 41 -42 28 41 -38 48 0 -43 2 50 134 0 0 -41 30 19 10 59 47 2 47 -7 -39 56 40 -43 8 25 -39 25 43 -43 42 54 133 0 0 -42 9 33 10 59 47 1 48 -6 -40 35 4 .. .. .. -40 3 52 .. .. .. Uncertainty in time = +/- 4 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 1828-01487-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 24 06.0715 DE: +29 23 04.800 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .028, .019 ) * V mag [mag]: 11.4 * B mag [mag]: 12.4 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (349) Dembowska approx. diameter [km]: 165 approx. diameter ["]: .129 distance from Earth [AU]: 1.76000 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1695 number of rejected observations: 175 time covered by the observations: 1904 Mar 18 - 2012 Nov 08 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.010, 74° remarks: * orbital elements for (349) Dembowska : Mean anomaly = 41.56892990 deg Arg. of pericenter = 347.58590132 deg Long. of node = 32.46699229 deg Inclination = 8.25107691 deg Eccentricity = 0.09075306 Semimajor axis = 2.92718165 AU Perihelion dist = 2.66153095 AU Mag: H = 5.93, G = 0.37 Epoch of elements : MJD 56261.45400000 TDT (2012 Nov 30.454) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 30 349 Dembowska 10h 54.2m UT 11.4 4 24 6.071 29 23 4.80TYC 1828-01487-1 12.4 9.6 165 13.7 1.760 -2.585 0.34 -167.2510 29.383 13.65 -21.74 10.9039 -0.00810 -0.77818 -6.76094 0.06953 0.00006 -0.00078 2000 41.28278020121129.00000347.585901 32.466992 8.2510770.09075306 2.9271817 2.6615310 5.9 5.00.37 RATE 1.9680200 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.021 86 1.17 0.021 0 0 5 0 056247.0020121130_1487-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 09:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org