IOTA/IOTA-ES occultation update for (368) Haidea / TYC 1329-00606-1 event on 2009 Apr 03, 20:10 UT Visible from Summary ------- On 2009 Apr 03 UT, the 70 km diameter asteroid (368) Haidea will occult a 11.3 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 16.4 mag (the magnitude of the asteroid) for at most 4.1 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: 64 * date and approx. time of event: 2009 Apr 03, 20:10 - 2009 Apr 03, 20:15 UT * magnitude of target star: 11.3 * magnitude drop [mag]: 5.1 * estimated maximum duration [s]: 4.1 * Moon: 64 % sunlit, 24° distance * Sun: 84° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 0.94 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .028 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .028", .025", 94° ) * approx speed of asteroid's shadow [km/s]: 16.8800 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1329-00606-1 by 368 Haidea on 2009 Apr 3 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 - 34 0 0 -26 26 24 20 10 45 48 356 -1 -26 52 21 -26 0 39 -27 41 37 -25 12 40 - 33 0 0 -26 20 49 20 10 51 48 355 -2 -26 46 44 -25 55 4 -27 35 58 -25 7 8 - 32 0 0 -26 15 36 20 10 57 48 353 -2 -26 41 31 -25 49 53 -27 30 43 -25 1 58 - 31 0 0 -26 10 46 20 11 3 48 352 -3 -26 36 40 -25 45 3 -27 25 50 -24 57 11 - 30 0 0 -26 6 19 20 11 9 47 350 -4 -26 32 12 -25 40 37 -27 21 20 -24 52 46 - 29 0 0 -26 2 15 20 11 16 47 349 -5 -26 28 7 -25 36 34 -27 17 14 -24 48 44 - 28 0 0 -25 58 34 20 11 22 47 347 -6 -26 24 25 -25 32 53 -27 13 31 -24 45 5 - 27 0 0 -25 55 16 20 11 28 47 346 -7 -26 21 6 -25 29 36 -27 10 11 -24 41 48 - 26 0 0 -25 52 21 20 11 34 47 345 -8 -26 18 11 -25 26 42 -27 7 14 -24 38 55 - 25 0 0 -25 49 49 20 11 40 47 343 -9 -26 15 39 -25 24 11 -27 4 41 -24 36 25 - 24 0 0 -25 47 41 20 11 46 46 342 -10 -26 13 30 -25 22 3 -27 2 31 -24 34 18 - 23 0 0 -25 45 56 20 11 52 46 340 -11 -26 11 44 -25 20 18 -27 0 45 -24 32 34 - 22 0 0 -25 44 34 20 11 58 46 339 -12 -26 10 22 -25 18 57 -26 59 22 -24 31 13 - 21 0 0 -25 43 36 20 12 4 46 338 -13 -26 9 24 -25 17 59 -26 58 23 -24 30 15 - 20 0 0 -25 43 1 20 12 9 45 336 -13 -26 8 49 -25 17 24 -26 57 48 -24 29 41 - 19 0 0 -25 42 50 20 12 15 45 335 -14 -26 8 37 -25 17 12 -26 57 36 -24 29 30 - 18 0 0 -25 43 1 20 12 21 44 334 -15 -26 8 49 -25 17 24 -26 57 48 -24 29 42 - 17 0 0 -25 43 36 20 12 27 44 333 -16 -26 9 24 -25 17 59 -26 58 23 -24 30 17 - 16 0 0 -25 44 35 20 12 32 44 331 -17 -26 10 23 -25 18 58 -26 59 22 -24 31 15 - 15 0 0 -25 45 57 20 12 38 43 330 -18 -26 11 45 -25 20 19 -27 0 45 -24 32 36 - 14 0 0 -25 47 42 20 12 44 43 329 -19 -26 13 30 -25 22 4 -27 2 30 -24 34 20 - 13 0 0 -25 49 50 20 12 49 42 328 -20 -26 15 39 -25 24 12 -27 4 40 -24 36 28 - 12 0 0 -25 52 22 20 12 55 42 327 -21 -26 18 11 -25 26 43 -27 7 12 -24 38 58 - 11 0 0 -25 55 16 20 13 0 41 326 -22 -26 21 6 -25 29 37 -27 10 8 -24 41 51 - 10 0 0 -25 58 34 20 13 6 40 325 -23 -26 24 24 -25 32 54 -27 13 27 -24 45 7 - 9 0 0 -26 2 14 20 13 11 40 324 -24 -26 28 5 -25 36 34 -27 17 9 -24 48 46 - 8 0 0 -26 6 17 20 13 16 39 323 -24 -26 32 8 -25 40 36 -27 21 15 -24 52 47 - 7 0 0 -26 10 43 20 13 21 39 322 -25 -26 36 35 -25 45 1 -27 25 43 -24 57 11 - 6 0 0 -26 15 31 20 13 26 38 321 -26 -26 41 24 -25 49 49 -27 30 34 -25 1 57 - 5 0 0 -26 20 42 20 13 31 37 320 -27 -26 46 36 -25 54 59 -27 35 47 -25 7 6 - 4 0 0 -26 26 16 20 13 36 37 319 -28 -26 52 11 -26 0 32 -27 41 23 -25 12 36 - 3 0 0 -26 32 11 20 13 41 36 318 -29 -26 58 7 -26 6 26 -27 47 22 -25 18 29 - 2 0 0 -26 38 29 20 13 46 35 317 -30 -27 4 26 -26 12 43 -27 53 42 -25 24 44 - 1 0 0 -26 45 8 20 13 51 35 316 -31 -27 11 6 -26 19 21 -28 0 25 -25 31 20 0 0 0 -26 52 9 20 13 55 34 315 -32 -27 18 9 -26 26 21 -28 7 30 -25 38 18 1 0 0 -26 59 32 20 14 0 33 314 -32 -27 25 33 -26 33 42 -28 14 56 -25 45 37 2 0 0 -27 7 16 20 14 4 32 314 -33 -27 33 18 -26 41 25 -28 22 44 -25 53 17 3 0 0 -27 15 21 20 14 9 32 313 -34 -27 41 25 -26 49 29 -28 30 54 -26 1 19 4 0 0 -27 23 48 20 14 13 31 312 -35 -27 49 52 -26 57 54 -28 39 24 -26 9 41 5 0 0 -27 32 35 20 14 17 30 311 -36 -27 58 41 -27 6 39 -28 48 15 -26 18 24 6 0 0 -27 41 42 20 14 21 29 310 -37 -28 7 50 -27 15 45 -28 57 27 -26 27 27 7 0 0 -27 51 10 20 14 25 29 310 -38 -28 17 19 -27 25 12 -29 7 0 -26 36 51 8 0 0 -28 0 58 20 14 29 28 309 -38 -28 27 8 -27 34 58 -29 16 52 -26 46 34 9 0 0 -28 11 5 20 14 32 27 308 -39 -28 37 18 -27 45 4 -29 27 5 -26 56 37 10 0 0 -28 21 33 20 14 36 26 308 -40 -28 47 47 -27 55 29 -29 37 37 -27 6 59 11 0 0 -28 32 19 20 14 40 25 307 -41 -28 58 35 -28 6 14 -29 48 29 -27 17 41 12 0 0 -28 43 25 20 14 43 24 306 -42 -29 9 42 -28 17 18 -29 59 40 -27 28 41 13 0 0 -28 54 49 20 14 46 24 306 -42 -29 21 8 -28 28 40 -30 11 9 -27 40 1 14 0 0 -29 6 31 20 14 50 23 305 -43 -29 32 53 -28 40 21 -30 22 58 -27 51 38 15 0 0 -29 18 32 20 14 53 22 304 -44 -29 44 56 -28 52 20 -30 35 4 -28 3 33 16 0 0 -29 30 51 20 14 56 21 304 -45 -29 57 16 -29 4 37 -30 47 28 -28 15 47 17 0 0 -29 43 27 20 14 58 20 303 -45 -30 9 54 -29 17 11 -31 0 10 -28 28 17 18 0 0 -29 56 20 20 15 1 19 303 -46 -30 22 50 -29 30 2 -31 13 10 -28 41 5 19 0 0 -30 9 31 20 15 4 19 302 -47 -30 36 2 -29 43 11 -31 26 26 -28 54 10 20 0 0 -30 22 57 20 15 6 18 301 -47 -30 49 31 -29 56 35 -31 39 59 -29 7 31 21 0 0 -30 36 40 20 15 9 17 301 -48 -31 3 16 -30 10 16 -31 53 48 -29 21 8 22 0 0 -30 50 39 20 15 11 16 300 -49 -31 17 17 -30 24 13 -32 7 53 -29 35 1 23 0 0 -31 4 53 20 15 13 15 300 -49 -31 31 33 -30 38 25 -32 22 13 -29 49 9 24 0 0 -31 19 22 20 15 15 14 299 -50 -31 46 4 -30 52 52 -32 36 48 -30 3 32 25 0 0 -31 34 6 20 15 17 13 298 -50 -32 0 50 -31 7 33 -32 51 38 -30 18 10 26 0 0 -31 49 4 20 15 19 12 298 -51 -32 15 50 -31 22 29 -33 6 43 -30 33 2 27 0 0 -32 4 16 20 15 20 12 297 -52 -32 31 4 -31 37 39 -33 22 1 -30 48 8 28 0 0 -32 19 41 20 15 22 11 297 -52 -32 46 32 -31 53 3 -33 37 33 -31 3 28 29 0 0 -32 35 20 20 15 23 10 296 -53 -33 2 13 -32 8 39 -33 53 18 -31 19 0 30 0 0 -32 51 11 20 15 25 9 296 -53 -33 18 6 -32 24 28 -34 9 15 -31 34 45 31 0 0 -33 7 14 20 15 26 8 295 -53 -33 34 11 -32 40 29 -34 25 25 -31 50 43 32 0 0 -33 23 30 20 15 27 7 294 -54 -33 50 29 -32 56 42 -34 41 47 -32 6 52 33 0 0 -33 39 56 20 15 28 6 294 -54 -34 6 57 -33 13 7 -34 58 20 -32 23 13 34 0 0 -33 56 33 20 15 29 5 293 -55 -34 23 37 -33 29 42 -35 15 3 -32 39 44 35 0 0 -34 13 21 20 15 29 5 293 -55 -34 40 27 -33 46 28 -35 31 57 .. .. .. 36 0 0 -34 30 19 20 15 30 4 292 -55 -34 57 27 -34 3 24 -35 49 2 .. .. .. 37 0 0 -34 47 27 20 15 30 3 292 -56 -35 14 37 -34 20 29 -36 6 15 .. .. .. 38 0 0 -35 4 43 20 15 31 2 291 -56 -35 31 55 -34 37 44 -36 23 38 .. .. .. 39 0 0 -35 22 9 20 15 31 1 291 -56 -35 49 23 -34 55 7 -36 41 9 .. .. .. 40 0 0 -35 39 42 20 15 31 0 290 -56 -36 6 58 -35 12 39 .. .. .. .. .. .. Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 1329-00606-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 32 32.7071 DE: +15 59 49.793 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .022 ) * V mag [mag]: 11.3 * B mag [mag]: 11.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (368) Haidea approx. diameter [km]: 70 approx. diameter ["]: .027 distance from Earth [AU]: 3.57500 * orbital information: orbit source: Preston date of fit: 2008 Mar 19 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 937 number of rejected observations: 57 time covered by the observations: 1905 Nov 01 - 2008 Feb 08 1 sigma uncertainty ellipse (major, minor, PA): 0.019, 0.013, 99° remarks: * orbital elements for (368) Haidea : Mean anomaly = 144.20057052 deg Arg. of pericenter = 91.45241345 deg Long. of node = 227.41879840 deg Inclination = 7.78903208 deg Eccentricity = 0.20129278 Semimajor axis = 3.07313407 AU Perihelion dist = 2.45453437 AU Mag: H = 9.77, G = 0.15 Epoch of elements : MJD 54924.84100000 TDT (2009 Apr 03.841) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Apr 3 368 Haidea 20h 10.9m UT 11.3 6 32 32.707 15 59 49.79TYC 1329-00606-1 11.7 16.4 70 4.1 3.575 1.619 2.10 -36.8664 15.996 -121.92 5.60 20.1810 0.05931 -0.67047 9.48927 0.85311 0.00583 -0.00042 2000 143.3149112009 330.00000 91.452413227.418798 7.7890320.20129278 3.0731341 2.4545344 9.9 5.00.15 RATE 1.8294980 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.028 0.025 94 1.94 0.025 0 54545.5020090403_0606-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 06:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org