IOTA/IOTA-ES occultation update for (231) Vindobona / TYC 0844-00584-1 event on 2009 Dec 01, 21:01 UT Visible from Summary ------- On 2009 Dec 01 UT, the 82 km diameter asteroid (231) Vindobona will occult a 10.2 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.7 mag to 14.9 mag (the magnitude of the asteroid) for at most 6.4 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: 83 * date and approx. time of event: 2009 Dec 01, 20:53 - 2009 Dec 01, 21:02 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 4.7 * estimated maximum duration [s]: 6.4 * Moon: 100 % sunlit, 90° distance * Sun: 95° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 82 * 1 sigma uncertainty interval [path widths]: +/- 0.63 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .025", 104° ) * approx speed of asteroid's shadow [km/s]: 12.9144 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0844-00584-1 by 231 Vindobona on 2009 Dec 1 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 40 0 0 14 59 0 20 53 42 0 77 -82 14 36 5 15 21 55 14 7 10 15 50 46 41 0 0 15 12 31 20 53 42 1 77 -83 14 49 37 15 35 24 14 20 45 16 4 12 42 0 0 15 25 38 20 53 42 2 77 -83 15 2 46 15 48 29 14 33 56 16 17 15 43 0 0 15 38 22 20 53 43 3 78 -83 15 15 32 16 1 11 14 46 45 16 29 55 44 0 0 15 50 43 20 53 43 4 78 -84 15 27 54 16 13 30 14 59 9 16 42 12 45 0 0 16 2 40 20 53 44 5 78 -84 15 39 53 16 25 25 15 11 10 16 54 5 46 0 0 16 14 13 20 53 45 6 78 -84 15 51 28 16 36 57 15 22 47 17 5 34 47 0 0 16 25 23 20 53 46 7 79 -84 16 2 40 16 48 5 15 34 1 17 16 40 48 0 0 16 36 8 20 53 47 8 79 -83 16 13 27 16 58 49 15 44 50 17 27 22 49 0 0 16 46 30 20 53 48 9 79 -83 16 23 50 17 9 9 15 55 16 17 37 40 50 0 0 16 56 27 20 53 49 10 80 -82 16 33 49 17 19 5 16 5 17 17 47 34 51 0 0 17 6 1 20 53 51 11 80 -82 16 43 24 17 28 37 16 14 53 17 57 4 52 0 0 17 15 10 20 53 53 12 80 -81 16 52 35 17 37 44 16 24 6 18 6 10 53 0 0 17 23 55 20 53 55 13 80 -80 17 1 21 17 46 28 16 32 54 18 14 52 54 0 0 17 32 15 20 53 56 14 81 -79 17 9 43 17 54 47 16 41 17 18 23 9 55 0 0 17 40 11 20 53 59 15 81 -79 17 17 40 18 2 42 16 49 16 18 31 2 56 0 0 17 47 42 20 54 1 16 81 -78 17 25 12 18 10 12 16 56 50 18 38 30 57 0 0 17 54 49 20 54 3 17 82 -77 17 32 20 18 17 17 17 3 59 18 45 34 58 0 0 18 1 31 20 54 6 18 82 -76 17 39 3 18 23 58 17 10 43 18 52 14 59 0 0 18 7 48 20 54 8 19 82 -75 17 45 21 18 30 14 17 17 3 18 58 29 60 0 0 18 13 40 20 54 11 20 82 -74 17 51 14 18 36 5 17 22 57 19 4 19 61 0 0 18 19 8 20 54 14 21 83 -73 17 56 43 18 41 32 17 28 27 19 9 44 62 0 0 18 24 10 20 54 17 22 83 -72 18 1 46 18 46 33 17 33 31 19 14 45 63 0 0 18 28 47 20 54 20 23 83 -72 18 6 24 18 51 10 17 38 10 19 19 20 64 0 0 18 33 0 20 54 23 24 84 -71 18 10 37 18 55 21 17 42 24 19 23 31 65 0 0 18 36 47 20 54 27 25 84 -70 18 14 25 18 59 8 17 46 13 19 27 17 66 0 0 18 40 9 20 54 30 26 84 -69 18 17 47 19 2 30 17 49 36 19 30 38 67 0 0 18 43 6 20 54 34 27 85 -68 18 20 45 19 5 26 17 52 34 19 33 33 68 0 0 18 45 37 20 54 38 27 85 -67 18 23 17 19 7 57 17 55 6 19 36 4 69 0 0 18 47 44 20 54 42 28 85 -66 18 25 23 19 10 3 17 57 13 19 38 10 70 0 0 18 49 25 20 54 46 29 85 -65 18 27 5 19 11 44 17 58 55 19 39 50 71 0 0 18 50 40 20 54 50 30 86 -64 18 28 20 19 12 59 18 0 11 19 41 5 72 0 0 18 51 30 20 54 54 31 86 -63 18 29 11 19 13 49 18 1 1 19 41 55 73 0 0 18 51 55 20 54 59 32 86 -62 18 29 35 19 14 14 18 1 26 19 42 19 74 0 0 18 51 54 20 55 3 33 87 -61 18 29 35 19 14 13 18 1 25 19 42 19 75 0 0 18 51 28 20 55 8 34 87 -60 18 29 8 19 13 47 18 0 59 19 41 53 76 0 0 18 50 36 20 55 13 35 87 -59 18 28 16 19 12 55 18 0 6 19 41 1 77 0 0 18 49 18 20 55 17 36 88 -58 18 26 58 19 11 38 17 58 48 19 39 44 78 0 0 18 47 35 20 55 22 37 88 -57 18 25 15 19 9 55 17 57 4 19 38 2 79 0 0 18 45 26 20 55 28 38 88 -57 18 23 5 19 7 46 17 54 55 19 35 54 80 0 0 18 42 52 20 55 33 39 88 -56 18 20 30 19 5 12 17 52 19 19 33 20 81 0 0 18 39 52 20 55 38 40 89 -55 18 17 30 19 2 13 17 49 17 19 30 21 82 0 0 18 36 25 20 55 44 41 89 -54 18 14 3 18 58 47 17 45 50 19 26 57 83 0 0 18 32 34 20 55 49 42 89 -53 18 10 10 18 54 56 17 41 56 19 23 6 84 0 0 18 28 16 20 55 55 43 89 -52 18 5 52 18 50 39 17 37 37 19 18 50 85 0 0 18 23 32 20 56 1 44 90 -51 18 1 7 18 45 56 17 32 51 19 14 9 86 0 0 18 18 23 20 56 7 45 90 -50 17 55 57 18 40 48 17 27 40 19 9 1 87 0 0 18 12 47 20 56 13 46 90 -49 17 50 21 18 35 13 17 22 2 19 3 28 88 0 0 18 6 46 20 56 19 47 90 -48 17 44 18 18 29 13 17 15 58 18 57 29 89 0 0 18 0 19 20 56 25 48 90 -47 17 37 50 18 22 47 17 9 29 18 51 5 90 0 0 17 53 26 20 56 31 49 91 -46 17 30 56 18 15 55 17 2 33 18 44 14 91 0 0 17 46 7 20 56 38 50 91 -45 17 23 35 18 8 37 16 55 11 18 36 58 92 0 0 17 38 22 20 56 44 51 91 -44 17 15 49 18 0 54 16 47 23 18 29 16 93 0 0 17 30 11 20 56 51 52 91 -43 17 7 36 17 52 44 16 39 8 18 21 8 94 0 0 17 21 34 20 56 58 53 91 -42 16 58 58 17 44 9 16 30 28 18 12 35 95 0 0 17 12 31 20 57 5 54 91 -41 16 49 53 17 35 7 16 21 21 18 3 35 96 0 0 17 3 2 20 57 12 55 92 -40 16 40 23 17 25 40 16 11 49 17 54 10 97 0 0 16 53 7 20 57 19 56 92 -39 16 30 26 17 15 47 16 1 50 17 44 19 98 0 0 16 42 46 20 57 26 57 92 -38 16 20 4 17 5 28 15 51 25 17 34 2 99 0 0 16 31 59 20 57 33 58 92 -37 16 9 15 16 54 43 15 40 34 17 23 20 100 0 0 16 20 47 20 57 41 59 92 -36 15 58 1 16 43 32 15 29 18 17 12 11 101 0 0 16 9 8 20 57 48 60 92 -35 15 46 20 16 31 56 15 17 35 17 0 37 102 0 0 15 57 4 20 57 56 61 92 -34 15 34 14 16 19 54 15 5 26 16 48 38 103 0 0 15 44 34 20 58 4 62 92 -33 15 21 42 16 7 26 14 52 52 16 36 12 104 0 0 15 31 39 20 58 11 63 92 -32 15 8 44 15 54 32 14 39 51 16 23 21 105 0 0 15 18 18 20 58 19 64 92 -31 14 55 21 15 41 13 14 26 25 16 10 5 106 0 0 15 4 31 20 58 27 65 92 -30 14 41 32 15 27 28 14 12 33 15 56 23 107 0 0 14 50 19 20 58 35 66 91 -29 14 27 18 15 13 19 13 58 16 15 42 16 108 0 0 14 35 41 20 58 43 67 91 -28 14 12 38 14 58 43 13 43 33 15 27 44 109 0 0 14 20 38 20 58 52 68 91 -27 13 57 33 14 43 43 13 28 25 15 12 46 110 0 0 14 5 10 20 59 0 69 90 -26 13 42 2 14 28 17 13 12 52 14 57 23 111 0 0 13 49 17 20 59 8 70 90 -25 13 26 7 14 12 27 12 56 54 14 41 36 112 0 0 13 33 0 20 59 17 71 90 -24 13 9 47 13 56 11 12 40 30 14 25 24 113 0 0 13 16 17 20 59 25 72 89 -23 12 53 2 13 39 31 12 23 42 14 8 47 114 0 0 12 59 10 20 59 34 73 88 -22 12 35 52 13 22 27 12 6 30 13 51 45 115 0 0 12 41 39 20 59 43 74 87 -21 12 18 19 13 4 58 11 48 53 13 34 20 116 0 0 12 23 43 20 59 52 75 86 -20 12 0 20 12 47 5 11 30 51 13 16 30 117 0 0 12 5 24 21 0 0 76 85 -18 11 41 58 12 28 48 11 12 26 12 58 16 118 0 0 11 46 41 21 0 9 77 84 -17 11 23 13 12 10 7 10 53 37 12 39 39 119 0 0 11 27 34 21 0 18 78 82 -16 11 4 3 11 51 3 10 34 25 12 20 38 120 0 0 11 8 4 21 0 27 79 80 -15 10 44 31 11 31 36 10 14 49 12 1 14 121 0 0 10 48 11 21 0 36 79 77 -14 10 24 36 11 11 46 9 54 50 11 41 27 122 0 0 10 27 56 21 0 46 80 74 -13 10 4 17 10 51 33 9 34 29 11 21 17 123 0 0 10 7 18 21 0 55 81 70 -12 9 43 37 10 30 57 9 13 45 11 0 45 124 0 0 9 46 18 21 1 4 82 66 -11 9 22 35 10 10 0 8 52 40 10 39 51 125 0 0 9 24 56 21 1 13 83 60 -10 9 1 10 9 48 41 8 31 12 10 18 35 126 0 0 9 3 13 21 1 23 83 53 -9 8 39 25 9 27 1 8 9 24 9 56 58 127 0 0 8 41 10 21 1 32 84 44 -8 8 17 19 9 5 0 7 47 14 9 35 0 128 0 0 8 18 45 21 1 41 84 34 -7 7 54 52 8 42 38 7 24 44 9 12 41 129 0 0 7 56 1 21 1 51 85 23 -6 7 32 5 8 19 56 7 1 54 8 50 2 130 0 0 7 32 57 21 2 0 84 12 -4 7 8 59 7 56 54 6 38 45 8 27 4 131 0 0 7 9 34 21 2 10 84 1 -3 6 45 33 7 33 33 6 15 16 8 3 46 132 0 0 6 45 52 21 2 19 84 351 -2 6 21 49 7 9 54 5 51 29 7 40 9 133 0 0 6 21 51 21 2 29 83 343 -1 5 57 46 6 45 56 5 27 23 7 16 14 134 0 0 5 57 34 21 2 38 82 337 0 5 33 26 6 21 40 5 3 0 6 52 2 Uncertainty in time = +/- 5 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0844-00584-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 29 23.9133 DE: +12 54 19.113 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 10.2 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (231) Vindobona approx. diameter [km]: 82 approx. diameter ["]: .040 distance from Earth [AU]: 2.85800 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 775 number of rejected observations: 77 time covered by the observations: 1902 Sep 04 - 2008 Feb 06 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.015, 117° remarks: * orbital elements for (231) Vindobona : Mean anomaly = 253.81475036 deg Arg. of pericenter = 267.18331072 deg Long. of node = 350.85722502 deg Inclination = 5.09584415 deg Eccentricity = 0.15638937 Semimajor axis = 2.92044747 AU Perihelion dist = 2.46372052 AU Mag: H = 9.45, G = 0.15 Epoch of elements : MJD 55166.87600000 TDT (2009 Dec 01.876) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 1 231 Vindobona 21h 1.9m UT 10.2 10 29 23.913 12 54 19.11TYC 0844-00584-1 10.6 14.9 82 6.4 2.858 1.435 -7.90 131.0276 12.907 -138.16 -21.92 21.0315 -0.03292 -0.08825 6.82194 -2.56796 -0.00553 0.00215 2000 252.45685620091125.00000267.183311350.857225 5.0958440.15638937 2.9204475 2.4637205 9.2 5.00.15 RATE 1.9748310 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.025 104 1.63 0.025 0 54545.5020091201_0584-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 17:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org