IOTA/IOTA-ES occultation update for (753) Tiflis / TYC 5578-00855-1 event on 2009 May 01, 03:34 UT Visible from Summary ------- On 2009 May 01 UT, the 24 km diameter asteroid (753) Tiflis will occult a 10.9 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.3 mag to 11.8 mag (the magnitude of the asteroid) for at most 3.2 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: 59 * date and approx. time of event: 2009 May 01, 03:23 - 2009 May 01, 03:44 UT * magnitude of target star: 10.9 * magnitude drop [mag]: 1.3 * estimated maximum duration [s]: 3.2 * Moon: 42 % sunlit, 101° distance * Sun: 172° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 1.05 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .053 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .056", .029", 112° ) * approx speed of asteroid's shadow [km/s]: 7.4411 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5578-00855-1 by 753 Tiflis on 2009 May 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 -137 0 0 31 11 39 3 44 14 0 100 0 31 20 39 31 2 40 31 39 38 .. .. .. -136 0 0 31 2 38 3 44 14 1 101 -1 31 11 37 30 53 39 31 30 35 .. .. .. -135 0 0 30 53 52 3 44 13 2 101 -2 31 2 51 30 44 54 31 21 47 .. .. .. -134 0 0 30 45 21 3 44 12 3 102 -3 30 54 20 30 36 24 31 13 15 30 17 40 -133 0 0 30 37 7 3 44 11 4 102 -4 30 46 5 30 28 10 31 4 59 30 9 27 -132 0 0 30 29 7 3 44 10 5 103 -5 30 38 5 30 20 11 30 56 58 30 1 29 -131 0 0 30 21 24 3 44 8 6 103 -5 30 30 21 30 12 28 30 49 13 29 53 47 -130 0 0 30 13 56 3 44 6 6 104 -6 30 22 53 30 5 1 30 41 44 29 46 21 -129 0 0 30 6 45 3 44 4 7 104 -7 30 15 41 29 57 50 30 34 31 29 39 12 -128 0 0 29 59 50 3 44 2 8 105 -8 30 8 45 29 50 55 30 27 34 29 32 18 -127 0 0 29 53 11 3 43 59 9 105 -9 30 2 6 29 44 17 30 20 53 29 25 40 -126 0 0 29 46 48 3 43 57 10 106 -10 29 55 42 29 37 55 30 14 29 29 19 19 -125 0 0 29 40 42 3 43 53 11 107 -10 29 49 36 29 31 49 30 8 22 29 13 14 -124 0 0 29 34 52 3 43 50 12 107 -11 29 43 45 29 25 59 30 2 30 29 7 25 -123 0 0 29 29 18 3 43 46 12 108 -12 29 38 12 29 20 26 29 56 56 29 1 53 -122 0 0 29 24 2 3 43 43 13 108 -13 29 32 55 29 15 10 29 51 38 28 56 37 -121 0 0 29 19 2 3 43 38 14 109 -14 29 27 54 29 10 10 29 46 37 28 51 39 -120 0 0 29 14 18 3 43 34 15 109 -15 29 23 11 29 5 27 29 41 52 28 46 56 -119 0 0 29 9 52 3 43 29 16 110 -15 29 18 44 29 1 1 29 37 25 28 42 31 -118 0 0 29 5 42 3 43 25 17 110 -16 29 14 34 28 56 52 29 33 14 28 38 22 -117 0 0 29 1 49 3 43 19 17 111 -17 29 10 40 28 52 59 29 29 20 28 34 30 -116 0 0 28 58 13 3 43 14 18 111 -18 29 7 4 28 49 23 29 25 43 28 30 55 -115 0 0 28 54 54 3 43 9 19 112 -18 29 3 45 28 46 5 29 22 23 28 27 37 -114 0 0 28 51 52 3 43 3 20 112 -19 29 0 42 28 43 3 29 19 20 28 24 35 -113 0 0 28 49 6 3 42 57 21 113 -20 28 57 56 28 40 17 29 16 34 28 21 51 -112 0 0 28 46 38 3 42 51 22 114 -21 28 55 28 28 37 49 29 14 5 28 19 23 -111 0 0 28 44 26 3 42 44 22 114 -21 28 53 16 28 35 38 29 11 53 28 17 12 -110 0 0 28 42 32 3 42 38 23 115 -22 28 51 21 28 33 44 29 9 57 28 15 18 -109 0 0 28 40 54 3 42 31 24 115 -23 28 49 43 28 32 6 29 8 19 28 13 41 -108 0 0 28 39 33 3 42 24 25 116 -24 28 48 23 28 30 46 29 6 58 28 12 21 -107 0 0 28 38 29 3 42 16 25 117 -24 28 47 18 28 29 42 29 5 53 28 11 17 -106 0 0 28 37 42 3 42 9 26 117 -25 28 46 31 28 28 55 29 5 6 28 10 31 -105 0 0 28 37 12 3 42 1 27 118 -26 28 46 1 28 28 25 29 4 35 28 10 1 -104 0 0 28 36 59 3 41 53 28 119 -26 28 45 47 28 28 11 29 4 22 28 9 48 -103 0 0 28 37 2 3 41 45 28 119 -27 28 45 50 28 28 15 29 4 25 28 9 51 -102 0 0 28 37 22 3 41 37 29 120 -28 28 46 10 28 28 35 29 4 44 28 10 11 -101 0 0 28 37 59 3 41 28 30 121 -28 28 46 47 28 29 11 29 5 21 28 10 48 -100 0 0 28 38 52 3 41 20 31 121 -29 28 47 40 28 30 5 29 6 14 28 11 41 - 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2008 Feb 06 1 sigma uncertainty ellipse (major, minor, PA): 0.051, 0.020, 117° remarks: * orbital elements for (753) Tiflis : Mean anomaly = 332.10227748 deg Arg. of pericenter = 203.20872457 deg Long. of node = 61.47493183 deg Inclination = 10.08822762 deg Eccentricity = 0.22126426 Semimajor axis = 2.32885366 AU Perihelion dist = 1.81356158 AU Mag: H = 10.06, G = 0.15 Epoch of elements : MJD 54952.14900000 TDT (2009 May 01.149) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 May 1 753 Tiflis 3h 33.7m UT 10.9 14 49 30.946- 8 38 45.31TYC 5578-00855-1 12.0 11.8 24 3.2 0.904 -2.706 -7.63 -50.2412 -8.642 125.87 15.10 3.5611 -0.12539 0.66013 -4.12605 -0.78444 -0.00031 -0.00058 2000 331.5063032009 429.00000203.208725 61.474932 10.0882280.22126426 2.3288537 1.813561610.2 5.00.15 RATE 2.7732610 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.056 0.029 112 2.05 0.038 0 54545.5020090501_0855-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 07:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org