IOTA/IOTA-ES occultation update for (1527) Malmquista / TYC 0587-00001-1 event on 2012 Nov 14, 04:14 UT Visible from Brazil, Peru Summary ------- On 2012 Nov 14 UT, the 12 km diameter asteroid (1527) Malmquista will occult a 10.3 mag star in the constellation Pisces for observers along a path across Brazil, Peru. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 15.2 mag (the magnitude of the asteroid) for at most 2.9 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: 27 * date and approx. time of event: 2012 Nov 14, 03:57 - 2012 Nov 14, 04:34 UT * geocentric midpoint of event [JD]: 2456245.67655417 * magnitude of target star: 10.3 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 2.9 * Moon: 0 % sunlit, 123° distance * Sun: 127° distance * rough path description: Brazil, Peru The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 2.53 * 1 sigma uncertainty interval [seconds]: +/- 8.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .042 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .042", .031", 78° ) * approx speed of asteroid's shadow [km/s]: 4.0985 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0587-00001-1 by 1527 Malmquista on 2012 Nov 14 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 Latitude Latitude Latitude Latitude -110 0 0 -63 15 9 3 57 27 26 356 -1 -63 29 3 -63 1 22 -64 41 28 -61 53 31 -109 0 0 -61 44 11 3 57 52 27 354 -2 -61 57 59 -61 30 31 -63 9 48 -60 23 8 -108 0 0 -60 9 26 3 58 20 29 353 -4 -60 23 5 -59 55 54 -61 34 6 -58 49 8 -107 0 0 -58 31 7 3 58 50 31 352 -5 -58 44 35 -58 17 45 -59 54 38 -57 11 46 -106 0 0 -56 49 32 3 59 22 32 350 -7 -57 2 49 -56 36 22 -58 11 44 -55 31 18 -105 0 0 -55 5 3 3 59 57 34 349 -9 -55 18 6 -54 52 6 -56 25 46 -53 48 5 -104 0 0 -53 18 2 4 0 34 35 347 -11 -53 30 49 -53 5 20 -54 37 8 -52 2 26 -103 0 0 -51 28 52 4 1 14 37 345 -13 -51 41 24 -51 16 26 -52 46 15 -50 14 46 -102 0 0 -49 37 59 4 1 57 38 343 -14 -49 50 14 -49 25 49 -50 53 35 -48 25 28 -101 0 0 -47 45 49 4 2 41 40 341 -16 -47 57 47 -47 33 56 -48 59 34 -46 34 56 -100 0 0 -45 52 48 4 3 27 42 339 -18 -46 4 28 -45 41 13 -47 4 39 -44 43 36 - 99 0 0 -43 59 21 4 4 16 43 337 -20 -44 10 43 -43 48 4 -45 9 17 -42 51 53 - 98 0 0 -42 5 54 4 5 6 44 335 -23 -42 16 58 -41 54 54 -43 13 55 -41 0 10 - 97 0 0 -40 12 51 4 5 57 46 332 -25 -40 23 36 -40 2 9 -41 18 57 -39 8 51 - 96 0 0 -38 20 33 4 6 49 47 330 -27 -38 31 1 -38 10 9 -39 24 45 -37 18 18 - 95 0 0 -36 29 23 4 7 42 48 327 -29 -36 39 32 -36 19 16 -37 31 43 -35 28 51 - 94 0 0 -34 39 38 4 8 36 49 324 -31 -34 49 30 -34 29 49 -35 40 9 -33 40 48 - 93 0 0 -32 51 37 4 9 30 50 321 -33 -33 1 12 -32 42 5 -33 50 21 -31 54 25 - 92 0 0 -31 5 33 4 10 25 50 318 -35 -31 14 52 -30 56 17 -32 2 33 -30 9 59 - 91 0 0 -29 21 40 4 11 19 51 315 -37 -29 30 42 -29 12 40 -30 17 0 -28 27 40 - 90 0 0 -27 40 8 4 12 13 51 312 -39 -27 48 55 -27 31 24 -28 33 51 -26 47 39 - 89 0 0 -26 1 6 4 13 6 51 309 -41 -26 9 38 -25 52 36 -26 53 16 -25 10 4 - 88 0 0 -24 24 40 4 13 59 52 306 -43 -24 32 57 -24 16 25 -25 15 21 -23 35 3 - 87 0 0 -22 50 56 4 14 51 52 303 -45 -22 59 0 -22 42 54 -23 40 11 -22 2 40 - 86 0 0 -21 19 57 4 15 42 51 301 -47 -21 27 47 -21 12 8 -22 7 50 -20 32 58 - 85 0 0 -19 51 45 4 16 32 51 298 -48 -19 59 23 -19 44 9 -20 38 21 -19 6 1 - 84 0 0 -18 26 22 4 17 21 51 295 -50 -18 33 48 -18 18 57 -19 11 43 -17 41 48 - 83 0 0 -17 3 46 4 18 9 50 293 -52 -17 11 1 -16 56 33 -17 47 58 -16 20 19 - 82 0 0 -15 43 58 4 18 55 50 291 -54 -15 51 2 -15 36 56 -16 27 2 -15 1 35 - 81 0 0 -14 26 55 4 19 40 49 288 -55 -14 33 48 -14 20 3 -15 8 56 -13 45 33 - 80 0 0 -13 12 35 4 20 24 48 286 -57 -13 19 19 -13 5 53 -13 53 36 -12 32 11 - 79 0 0 -12 0 56 4 21 6 48 285 -58 -12 7 30 -11 54 23 -12 41 0 -11 21 27 - 78 0 0 -10 51 54 4 21 48 47 283 -60 -10 58 20 -10 45 30 -11 31 4 -10 13 17 - 77 0 0 - 9 45 26 4 22 27 46 281 -61 - 9 51 43 - 9 39 10 -10 23 45 - 9 7 38 - 76 0 0 - 8 41 28 4 23 6 45 280 -62 - 8 47 38 - 8 35 20 - 9 18 59 - 8 4 27 - 75 0 0 - 7 39 57 4 23 43 44 278 -64 - 7 45 59 - 7 33 56 - 8 16 42 - 7 3 40 - 74 0 0 - 6 40 49 4 24 19 43 277 -65 - 6 46 44 - 6 34 55 - 7 16 50 - 6 5 13 - 73 0 0 - 5 43 59 4 24 53 42 276 -66 - 5 49 47 - 5 38 12 - 6 19 20 - 5 9 3 - 72 0 0 - 4 49 25 4 25 26 41 275 -67 - 4 55 7 - 4 43 43 - 5 24 6 - 4 15 6 - 71 0 0 - 3 57 1 4 25 58 40 274 -68 - 4 2 37 - 3 51 26 - 4 31 6 - 3 23 18 - 70 0 0 - 3 6 45 4 26 29 39 273 -69 - 3 12 16 - 3 1 16 - 3 40 16 - 2 33 36 - 69 0 0 - 2 18 33 4 26 58 38 273 -69 - 2 23 58 - 2 13 9 - 2 51 31 - 1 45 56 - 68 0 0 - 1 32 21 4 27 27 37 272 -70 - 1 37 41 - 1 27 2 - 2 4 48 - 1 0 14 - 67 0 0 - 0 48 6 4 27 54 36 271 -71 - 0 53 21 - 0 42 51 - 1 20 3 - 0 16 27 - 66 0 0 - 0 5 44 4 28 20 34 271 -71 - 0 10 54 - 0 0 34 - 0 37 13 0 25 28 - 65 0 0 0 34 48 4 28 45 33 271 -71 0 29 42 0 39 54 0 3 45 1 5 34 - 64 0 0 1 13 34 4 29 9 32 270 -72 1 8 32 1 18 35 0 42 56 1 43 55 - 63 0 0 1 50 35 4 29 31 31 270 -72 1 45 37 1 55 33 1 20 20 2 20 34 - 62 0 0 2 25 56 4 29 53 30 269 -72 2 21 1 2 30 50 1 56 3 2 55 33 - 61 0 0 2 59 38 4 30 14 29 269 -72 2 54 46 3 4 29 2 30 6 3 28 54 - 60 0 0 3 31 44 4 30 34 28 269 -71 3 26 56 3 36 32 3 2 33 4 0 42 - 59 0 0 4 2 18 4 30 53 27 269 -71 3 57 33 4 7 3 3 33 25 4 30 57 - 58 0 0 4 31 21 4 31 11 26 269 -71 4 26 39 4 36 3 4 2 46 4 59 43 - 57 0 0 4 58 56 4 31 28 25 269 -70 4 54 17 5 3 35 4 30 38 5 27 1 - 56 0 0 5 25 5 4 31 44 24 268 -70 5 20 28 5 29 41 4 57 2 5 52 54 - 55 0 0 5 49 49 4 31 59 22 268 -69 5 45 15 5 54 23 5 22 2 6 17 24 - 54 0 0 6 13 12 4 32 14 21 268 -69 6 8 40 6 17 43 5 45 38 6 40 33 - 53 0 0 6 35 14 4 32 27 20 268 -68 6 30 44 6 39 43 6 7 54 7 2 23 - 52 0 0 6 55 58 4 32 40 19 268 -67 6 51 30 7 0 25 6 28 50 7 22 54 - 51 0 0 7 15 25 4 32 52 18 268 -67 7 10 59 7 19 50 6 48 29 7 42 10 - 50 0 0 7 33 37 4 33 4 17 268 -66 7 29 12 7 38 0 7 6 51 8 0 11 - 49 0 0 7 50 35 4 33 14 16 269 -65 7 46 12 7 54 57 7 24 0 8 16 59 - 48 0 0 8 6 20 4 33 24 15 269 -64 8 2 0 8 10 41 7 39 55 8 32 36 - 47 0 0 8 20 55 4 33 33 14 269 -63 8 16 36 8 25 14 7 54 39 8 47 2 - 46 0 0 8 34 20 4 33 42 13 269 -63 8 30 2 8 38 38 8 8 12 9 0 19 - 45 0 0 8 46 37 4 33 50 12 269 -62 8 42 20 8 50 54 8 20 36 9 12 28 - 44 0 0 8 57 46 4 33 57 11 269 -61 8 53 30 9 2 2 8 31 52 9 23 30 - 43 0 0 9 7 49 4 34 3 10 269 -60 9 3 34 9 12 3 8 42 2 9 33 26 - 42 0 0 9 16 46 4 34 9 9 269 -59 9 12 32 9 21 0 8 51 5 9 42 18 - 41 0 0 9 24 39 4 34 14 8 269 -58 9 20 26 9 28 51 8 59 3 9 50 5 - 40 0 0 9 31 28 4 34 19 7 270 -57 9 27 16 9 35 40 9 5 57 9 56 49 - 39 0 0 9 37 14 4 34 23 6 270 -56 9 33 3 9 41 25 9 11 48 10 2 31 - 38 0 0 9 41 58 4 34 26 5 270 -55 9 37 47 9 46 8 9 16 35 10 7 11 - 37 0 0 9 45 40 4 34 29 4 270 -55 9 41 30 9 49 50 9 20 21 .. .. .. - 36 0 0 9 48 22 4 34 31 3 270 -54 9 44 12 9 52 31 9 23 6 .. .. .. - 35 0 0 9 50 3 4 34 32 2 270 -53 9 45 54 9 54 12 9 24 49 .. .. .. - 34 0 0 9 50 44 4 34 33 1 271 -52 9 46 36 9 54 53 9 25 33 .. .. .. Uncertainty in time = +/- 9 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 0587-00001-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 56 04.0052 DE: +00 40 08.835 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .033, .026 ) * V mag [mag]: 10.3 * B mag [mag]: 10.8 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1527) Malmquista approx. diameter [km]: 12 approx. diameter ["]: .014 distance from Earth [AU]: 1.19700 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1160 number of rejected observations: 33 time covered by the observations: 1929 Oct 09 - 2012 Oct 10 1 sigma uncertainty ellipse (major, minor, PA): 0.027, 0.018, 60° remarks: * orbital elements for (1527) Malmquista : Mean anomaly = 43.80256976 deg Arg. of pericenter = 304.31861064 deg Long. of node = 16.25298716 deg Inclination = 5.19417326 deg Eccentricity = 0.19726476 Semimajor axis = 2.22756983 AU Perihelion dist = 1.78814880 AU Mag: H = 11.93, G = 0.15 Epoch of elements : MJD 56245.17700000 TDT (2012 Nov 14.177) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 14 1527 Malmquista 4h 14.2m UT 10.3 23 56 4.005 0 40 8.83TYC 0587-00001-1 10.8 15.2 12 2.9 1.197 0.758 12.66 -118.2157 0.665 112.56 -18.32 4.2373 0.46188 -0.41361 1.54449 1.72217 0.00397 0.00166 2000 42.267828201211 9.00000304.318611 16.252987 5.1941730.19726476 2.2275698 1.788148812.2 5.00.15 RATE 2.9645390 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.042 0.031 78 3.53 0.035 0 0 2 5 056226.0020121114_0001-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org