IOTA/IOTA-ES occultation update for (1596) Itzigsohn / 2UCAC 39809335 event on 2008 Nov 06, 07:47 UT Visible from Brazil, Argentina Summary ------- On 2008 Nov 06 UT, the 50 km diameter asteroid (1596) Itzigsohn will occult a 11.6 mag star in the constellation Taurus for observers along a path across Brazil, Argentina. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.9 mag to 14.4 mag (the magnitude of the asteroid) for at most 7.8 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: 68 * date and approx. time of event: 2008 Nov 06, 07:42 - 2008 Nov 06, 08:00 UT * magnitude of target star: 11.6 * magnitude drop [mag]: 2.9 * estimated maximum duration [s]: 7.8 * Moon: 51 % sunlit, 130° distance * Sun: 138° distance * rough path description: Brazil, Argentina The occultation path -------------------- * approximate projected width [km]: 69 * 1 sigma uncertainty interval [path widths]: +/- 0.86 * 1 sigma uncertainty interval [seconds]: +/- 5.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .038 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .039", .023", 99° ) * approx speed of asteroid's shadow [km/s]: 6.3636 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 39809335 by 1596 Itzigsohn on 2008 Nov 6 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 - 74 23 14 -65 0 0 8 0 23 2 355 -1 - 75 7 47 - 73 38 25 - 76 23 49 - 72 20 42 - 74 30 2 -64 0 0 8 0 22 3 355 -1 - 75 12 59 - 73 46 51 - 76 26 19 - 72 31 58 - 74 34 5 -63 0 0 8 0 21 4 355 -2 - 75 15 34 - 73 52 22 - 76 26 25 - 72 40 4 - 74 35 37 -62 0 0 8 0 19 5 355 -3 - 75 15 46 - 73 55 16 - 76 24 21 - 72 45 21 - 74 34 54 -61 0 0 8 0 16 6 355 -3 - 75 13 49 - 73 55 48 - 76 20 18 - 72 48 3 - 74 32 7 -60 0 0 8 0 14 7 355 -4 - 75 9 53 - 73 54 10 - 76 14 26 - 72 48 25 - 74 27 26 -59 0 0 8 0 11 8 355 -5 - 75 4 9 - 73 50 33 - 76 6 55 - 72 46 40 - 74 21 1 -58 0 0 8 0 7 9 355 -5 - 74 56 46 - 73 45 6 - 75 57 52 - 72 42 56 - 74 12 59 -57 0 0 8 0 3 10 354 -6 - 74 47 49 - 73 37 59 - 75 47 23 - 72 37 23 - 74 3 26 -56 0 0 7 59 59 11 354 -7 - 74 37 26 - 73 29 17 - 75 35 34 - 72 30 10 - 73 52 29 -55 0 0 7 59 54 12 354 -7 - 74 25 42 - 73 19 7 - 75 22 30 - 72 21 22 - 73 40 12 -54 0 0 7 59 49 13 354 -8 - 74 12 41 - 73 7 34 - 75 8 15 - 72 11 6 - 73 26 40 -53 0 0 7 59 43 14 354 -8 - 73 58 29 - 72 54 43 - 74 52 53 - 71 59 26 - 73 11 57 -52 0 0 7 59 37 15 353 -9 - 73 43 8 - 72 40 39 - 74 36 27 - 71 46 28 - 72 56 7 -51 0 0 7 59 30 16 353 -10 - 73 26 42 - 72 25 24 - 74 19 0 - 71 32 16 - 72 39 11 -50 0 0 7 59 24 17 353 -10 - 73 9 13 - 72 9 2 - 74 0 35 - 71 16 52 - 72 21 14 -49 0 0 7 59 16 18 353 -11 - 72 50 45 - 71 51 36 - 73 41 14 - 71 0 20 - 72 2 17 -48 0 0 7 59 9 19 352 -11 - 72 31 19 - 71 33 8 - 73 20 58 - 70 42 42 - 71 42 22 -47 0 0 7 59 0 20 352 -12 - 72 10 56 - 71 13 40 - 72 59 49 - 70 24 2 - 71 21 30 -46 0 0 7 58 52 21 352 -12 - 71 49 40 - 70 53 14 - 72 37 50 - 70 4 20 - 70 59 44 -45 0 0 7 58 43 22 351 -12 - 71 27 30 - 70 31 52 - 72 14 59 - 69 43 39 - 70 37 5 -44 0 0 7 58 34 23 351 -13 - 71 4 28 - 70 9 35 - 71 51 20 - 69 22 0 - 70 13 33 -43 0 0 7 58 24 24 350 -13 - 70 40 36 - 69 46 23 - 71 26 52 - 68 59 24 - 69 49 9 -42 0 0 7 58 14 25 350 -14 - 70 15 53 - 69 22 19 - 71 1 36 - 68 35 53 - 69 23 55 -41 0 0 7 58 3 26 349 -14 - 69 50 20 - 68 57 22 - 70 35 33 - 68 11 27 - 68 57 49 -40 0 0 7 57 52 27 349 -14 - 69 23 59 - 68 31 34 - 70 8 43 - 67 46 7 - 68 30 54 -39 0 0 7 57 41 27 348 -15 - 68 56 48 - 68 4 54 - 69 41 7 - 67 19 54 - 68 3 9 -38 0 0 7 57 29 28 348 -15 - 68 28 49 - 67 37 23 - 69 12 43 - 66 52 47 - 67 34 34 -37 0 0 7 57 17 29 347 -15 - 68 0 1 - 67 9 1 - 68 43 33 - 66 24 47 - 67 5 9 -36 0 0 7 57 5 30 347 -16 - 67 30 25 - 66 39 48 - 68 13 36 - 65 55 55 - 66 34 55 -35 0 0 7 56 52 31 346 -16 - 66 59 59 - 66 9 44 - 67 42 52 - 65 26 9 - 66 3 49 -34 0 0 7 56 38 32 346 -16 - 66 28 44 - 65 38 48 - 67 11 20 - 64 55 30 - 65 31 53 -33 0 0 7 56 25 33 345 -16 - 65 56 39 - 65 7 0 - 66 39 1 - 64 23 57 - 64 59 5 -32 0 0 7 56 10 34 344 -17 - 65 23 44 - 64 34 20 - 66 5 52 - 63 51 30 - 64 25 26 -31 0 0 7 55 56 35 343 -17 - 64 49 57 - 64 0 47 - 65 31 54 - 63 18 8 - 63 50 53 -30 0 0 7 55 41 35 343 -17 - 64 15 19 - 63 26 20 - 64 57 6 - 62 43 50 - 63 15 26 -29 0 0 7 55 26 36 342 -17 - 63 39 48 - 62 50 58 - 64 21 26 - 62 8 36 - 62 39 4 -28 0 0 7 55 10 37 341 -17 - 63 3 22 - 62 14 39 - 63 44 54 - 61 32 23 - 62 1 46 -27 0 0 7 54 54 38 340 -17 - 62 26 1 - 61 37 24 - 63 7 28 - 60 55 12 - 61 23 30 -26 0 0 7 54 37 38 339 -17 - 61 47 44 - 60 59 9 - 62 29 8 - 60 17 0 - 60 44 15 -25 0 0 7 54 20 39 338 -17 - 61 8 28 - 60 19 55 - 61 49 50 - 59 37 46 - 60 3 59 -24 0 0 7 54 3 40 337 -17 - 60 28 12 - 59 39 38 - 61 9 35 - 58 57 27 - 59 22 39 -23 0 0 7 53 45 41 336 -17 - 59 46 54 - 58 58 17 - 60 28 19 - 58 16 3 - 58 40 15 -22 0 0 7 53 27 41 335 -17 - 59 4 32 - 58 15 50 - 59 46 1 - 57 33 31 - 57 56 43 -21 0 0 7 53 9 42 334 -17 - 58 21 4 - 57 32 14 - 59 2 38 - 56 49 48 - 57 12 1 -20 0 0 7 52 50 43 333 -17 - 57 36 27 - 56 47 27 - 58 18 9 - 56 4 52 - 56 26 6 -19 0 0 7 52 30 43 332 -16 - 56 50 38 - 56 1 26 - 57 32 30 - 55 18 39 - 55 38 55 -18 0 0 7 52 11 44 331 -16 - 56 3 34 - 55 14 7 - 56 45 38 - 54 31 7 - 54 50 25 -17 0 0 7 51 51 44 329 -16 - 55 15 12 - 54 25 28 - 55 57 30 - 53 42 11 - 54 0 31 -16 0 0 7 51 30 45 328 -16 - 54 25 29 - 53 35 24 - 55 8 3 - 52 51 48 - 53 9 10 -15 0 0 7 51 9 45 327 -15 - 53 34 19 - 52 43 51 - 54 17 13 - 51 59 53 - 52 16 17 -14 0 0 7 50 48 46 325 -15 - 52 41 39 - 51 50 43 - 53 24 55 - 51 6 21 - 51 21 46 -13 0 0 7 50 26 46 324 -15 - 51 47 24 - 50 55 57 - 52 31 4 - 50 11 7 - 50 25 32 -12 0 0 7 50 4 46 322 -14 - 50 51 27 - 49 59 26 - 51 35 35 - 49 14 4 - 49 27 28 -11 0 0 7 49 41 46 321 -14 - 49 53 42 - 49 1 2 - 50 38 23 - 48 15 5 - 48 27 28 -10 0 0 7 49 18 47 319 -13 - 48 54 4 - 48 0 40 - 49 39 19 - 47 14 2 - 47 25 23 - 9 0 0 7 48 54 47 318 -13 - 47 52 22 - 46 58 9 - 48 38 18 - 46 10 46 - 46 21 3 - 8 0 0 7 48 30 47 316 -12 - 46 48 30 - 45 53 21 - 47 35 10 - 45 5 7 - 45 14 18 - 7 0 0 7 48 5 47 315 -11 - 45 42 15 - 44 46 4 - 46 29 46 - 43 56 54 - 44 4 56 - 6 0 0 7 47 40 47 313 -11 - 44 33 28 - 43 36 7 - 45 21 54 - 42 45 51 - 42 52 42 - 5 0 0 7 47 14 47 311 -10 - 43 21 53 - 42 23 13 - 44 11 23 - 41 31 44 - 41 37 21 - 4 0 0 7 46 48 46 310 -9 - 42 7 15 - 41 7 6 - 42 57 57 - 40 14 14 - 40 18 32 - 3 0 0 7 46 21 46 308 -8 - 40 49 16 - 39 47 24 - 41 41 20 - 38 52 58 - 38 55 52 - 2 0 0 7 45 53 46 306 -7 - 39 27 34 - 38 23 45 - 40 21 10 - 37 27 28 - 37 28 53 - 1 0 0 7 45 25 45 305 -6 - 38 1 42 - 36 55 37 - 38 57 5 - 35 57 12 - 35 57 1 0 0 0 7 44 56 45 303 -5 - 36 31 6 - 35 22 23 - 37 28 34 - 34 21 28 - 34 19 31 1 0 0 7 44 26 44 301 -4 - 34 55 7 - 33 43 16 - 35 55 1 - 32 39 23 Latitude Latitude Latitude Latitude - 34 0 0 1 11 34 7 44 20 44 301 -4 1 32 50 0 50 8 2 9 7 0 12 57 - 33 0 0 1 46 13 7 44 2 43 300 -3 2 7 17 1 25 0 2 43 12 0 48 12 - 32 0 0 2 19 31 7 43 44 43 299 -3 2 40 22 1 58 31 3 15 58 1 22 4 - 31 0 0 2 51 29 7 43 27 42 299 -2 3 12 9 2 30 40 3 47 25 1 54 35 - 30 0 0 3 22 9 7 43 10 42 298 -1 3 42 39 3 1 32 4 17 37 2 25 45 - 29 0 0 3 51 32 7 42 53 41 297 0 4 11 51 3 31 5 4 46 32 2 55 37 Uncertainty in time = +/- 8 secs [Prediction of 2008 Oct 30.0] Data for the target star ------------------------ * name: 2UCAC 39809335 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 42 30.2291 DE: +22 47 44.408 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .017 ) * V mag [mag]: 11.6 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1596) Itzigsohn approx. diameter [km]: 50 approx. diameter ["]: .040 distance from Earth [AU]: 1.71500 * orbital information: orbit source: Preston date of fit: 2008 Oct 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 843 number of rejected observations: 31 time covered by the observations: 1934 Nov 07 - 2008 Oct 07 1 sigma uncertainty ellipse (major, minor, PA): 0.035, 0.016, 101° remarks: * orbital elements for (1596) Itzigsohn : Mean anomaly = 15.90382774 deg Arg. of pericenter = 161.09377595 deg Long. of node = 249.22494456 deg Inclination = 13.28738370 deg Eccentricity = 0.12754428 Semimajor axis = 2.89109605 AU Perihelion dist = 2.52235329 AU Mag: H = 10.53, G = 0.15 Epoch of elements : MJD 54776.32500000 TDT (2008 Nov 06.325) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 6 1596 Itzigsohn 7h 48.3m UT 11.6 5 42 30.229 22 47 44.412UCAC 39809335 0.0 14.4 50 7.8 1.715 -0.872 -13.95 -77.3427 22.799 58.85 -16.12 7.8044 0.51779 -0.44621 -2.34762 -2.71840 -0.00382 -0.00007 2000 14.63567720081031.00000161.093776249.224945 13.2873840.12754428 2.8910961 2.522353310.4 5.00.15 RATE 2.0049820 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.039 0.023 99 1.86 0.035 0 54769.5020081106_809335 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 30, 14:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org