IOTA/IOTA-ES occultation update for (914) Palisana / TYC 1723-00380-1 event on 2008 May 03, 20:50 UT Visible from SW Australia Summary ------- On 2008 May 03 UT, the 81 km diameter asteroid (914) Palisana will occult a 12.5 mag star in the constellation Pegasus for observers along a path across SW Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.2 mag to 13.3 mag (the magnitude of the asteroid) for at most 1.9 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: 91 * date and approx. time of event: 2008 May 03, 20:48 - 2008 May 03, 20:49 UT * midpoint of event [JD]: 2454590.36868333 * magnitude of target star: 12.5 * magnitude drop [mag]: 1.2 * estimated maximum duration [s]: 1.9 * Moon: 4 % sunlit, 26° distance * Sun: 47° distance * rough path description: SW Australia The occultation path -------------------- * approximate projected width [km]: 82 * 1 sigma uncertainty interval [path widths]: +/- 0.51 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .025", .022", 84° ) * approx speed of asteroid's shadow [km/s]: 42.6508 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1723-00380-1 by 914 Palisana on 2008 May 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 104 0 0 -40 1 39 20 48 27 0 66 -35 .. .. .. -39 37 23 .. .. .. -39 12 39 105 0 0 -39 41 11 20 48 27 1 66 -35 -40 5 35 -39 16 49 -40 30 31 -38 52 0 106 0 0 -39 20 9 20 48 27 2 65 -34 -39 44 39 -38 55 41 -40 9 40 -38 30 46 107 0 0 -38 58 32 20 48 27 3 64 -33 -39 23 7 -38 33 58 -39 48 14 -38 8 57 108 0 0 -38 36 19 20 48 28 3 64 -32 -39 1 1 -38 11 40 -39 26 14 -37 46 34 109 0 0 -38 13 32 20 48 28 4 63 -32 -38 38 19 -37 48 47 -39 3 38 -37 23 34 110 0 0 -37 50 9 20 48 28 5 63 -31 -38 15 2 -37 25 18 -38 40 27 -36 59 59 111 0 0 -37 26 10 20 48 28 6 62 -30 -37 51 9 -37 1 13 -38 16 40 -36 35 49 112 0 0 -37 1 35 20 48 28 7 61 -29 -37 26 40 -36 36 32 -37 52 18 -36 11 2 113 0 0 -36 36 24 20 48 29 8 61 -29 -37 1 35 -36 11 15 -37 27 19 -35 45 39 114 0 0 -36 10 37 20 48 29 9 60 -28 -36 35 54 -35 45 22 -37 1 44 -35 19 39 115 0 0 -35 44 13 20 48 30 10 60 -27 -36 9 36 -35 18 52 -36 35 32 -34 53 3 116 0 0 -35 17 13 20 48 30 11 59 -26 -35 42 42 -34 51 45 -36 8 44 -34 25 50 117 0 0 -34 49 35 20 48 30 12 58 -25 -35 15 11 -34 24 2 -35 41 19 -33 58 0 118 0 0 -34 21 21 20 48 31 13 58 -24 -34 47 3 -33 55 42 -35 13 18 -33 29 34 119 0 0 -33 52 30 20 48 32 14 57 -24 -34 18 18 -33 26 44 -34 44 39 -33 0 30 120 0 0 -33 23 2 20 48 32 15 57 -23 -33 48 56 -32 57 10 -34 15 23 -32 30 50 121 0 0 -32 52 57 20 48 33 15 56 -22 -33 18 57 -32 26 59 -33 45 31 -32 0 33 122 0 0 -32 22 15 20 48 34 16 56 -21 -32 48 21 -31 56 11 -33 15 1 -31 29 38 123 0 0 -31 50 56 20 48 34 17 55 -20 -32 17 8 -31 24 46 -32 43 54 -30 58 7 124 0 0 -31 19 0 20 48 35 18 55 -19 -31 45 18 -30 52 45 -32 12 11 -30 26 0 125 0 0 -30 46 28 20 48 36 19 54 -18 -31 12 52 -30 20 7 -31 39 51 -29 53 16 126 0 0 -30 13 20 20 48 37 21 53 -17 -30 39 50 -29 46 53 -31 6 54 -29 19 56 127 0 0 -29 39 35 20 48 38 22 53 -16 -30 6 11 -29 13 2 -30 33 21 -28 46 0 128 0 0 -29 5 15 20 48 39 23 52 -15 -29 31 57 -28 38 37 -29 59 13 -28 11 29 129 0 0 -28 30 20 20 48 40 24 52 -14 -28 57 7 -28 3 36 -29 24 29 -27 36 22 130 0 0 -27 54 50 20 48 41 25 51 -13 -28 21 42 -27 28 0 -28 49 9 -27 0 41 131 0 0 -27 18 45 20 48 42 26 51 -12 -27 45 42 -26 51 50 -28 13 15 -26 24 25 132 0 0 -26 42 6 20 48 44 27 50 -11 -27 9 9 -26 15 6 -27 36 47 -25 47 36 133 0 0 -26 4 54 20 48 45 28 50 -10 -26 32 2 -25 37 49 -26 59 45 -25 10 14 134 0 0 -25 27 10 20 48 46 29 49 -9 -25 54 23 -25 0 0 -26 22 11 -24 32 20 135 0 0 -24 48 54 20 48 48 30 49 -8 -25 16 11 -24 21 39 -25 44 4 -23 53 55 136 0 0 -24 10 6 20 48 49 31 48 -7 -24 37 28 -23 42 47 -25 5 26 -23 14 58 137 0 0 -23 30 49 20 48 51 32 48 -6 -23 58 15 -23 3 25 -24 26 17 -22 35 32 138 0 0 -22 51 2 20 48 53 34 47 -5 -23 18 32 -22 23 34 -23 46 38 -21 55 37 139 0 0 -22 10 47 20 48 54 35 47 -4 -22 38 21 -21 43 16 -23 6 31 -21 15 14 140 0 0 -21 30 4 20 48 56 36 46 -3 -21 57 42 -21 2 30 -22 25 56 -20 34 25 141 0 0 -20 48 56 20 48 58 37 46 -2 -21 16 37 -20 21 18 -21 44 54 -19 53 9 142 0 0 -20 7 23 20 49 0 38 46 -1 -20 35 7 -19 39 41 -21 3 27 -19 11 30 Uncertainty in time = +/- 1 secs [Prediction of 2008 Mar 31.0] Data for the target star ------------------------ * name: TYC 1723-00380-1 * constellation : Pegasus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 29 37.7081 DE: +17 49 41.761 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 12.5 * B mag [mag]: 13.2 * Apparent position with proper motion RA(deg): 352.5100262710 DE(deg): 17.8720602002 * Equation of equinoxes (radians) : 0.000037935996702 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (914) Palisana approx. diameter [km]: 81 approx. diameter ["]: .044 distance from Earth [AU]: 2.54800 * orbital information: orbit source: Preston date of fit: 2008 Feb 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 661 number of rejected observations: 44 time covered by the observations: 1931 Oct 13 - 2007 Aug 15 1 sigma uncertainty ellipse (major, minor, PA): 0.013, 0.006, 66° remarks: * orbital elements for (914) Palisana : Mean anomaly = 22.13213783 deg Arg. of pericenter = 48.57097447 deg Long. of node = 255.87901115 deg Inclination = 25.22215511 deg Eccentricity = 0.21319339 Semimajor axis = 2.45775336 AU Perihelion dist = 1.93377660 AU Mag: H = 9.06, G = 0.15 Epoch of elements : MJD 54589.86900000 TDT (2008 May 03.869) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 3 914 Palisana 20h 50.9m UT 12.5 23 29 37.708 17 49 41.76TYC 1723-00380-1 13.2 13.3 81 1.9 2.548 4.942 43.87 177.5593 17.816 -133.52 15.98 20.8484 0.09617 -0.15396 20.44420 12.71058 -0.00375 -0.00035 2000 19.6076712008 424.00000 48.570974255.879011 25.2221550.21319339 2.4577534 1.9337766 8.8 5.00.15 RATE 2.5579760 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.025 0.022 84 1.51 0.023 0 54556.5020080503_0380-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 31, 03:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org