IOTA/IOTA-ES occultation update for (1672) Gezelle / TYC 1225-01472-1 event on 2008 Nov 03, 04:34 UT Visible from Europe, Canada, USA, Mexico Summary ------- On 2008 Nov 03 UT, the 34 km diameter asteroid (1672) Gezelle will occult a 10.7 mag star in the constellation Aries for observers along a path across Europe, Canada, USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 14.0 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: 41 * date and approx. time of event: 2008 Nov 03, 04:23 - 2008 Nov 03, 04:46 UT * magnitude of target star: 10.7 * magnitude drop [mag]: 3.4 * estimated maximum duration [s]: 4.1 * Moon: 23 % sunlit, 129° distance * Sun: 173° distance * rough path description: Europe, Canada, USA, Mexico The occultation path -------------------- * approximate projected width [km]: 37 * 1 sigma uncertainty interval [path widths]: +/- 1.62 * 1 sigma uncertainty interval [seconds]: +/- 7.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .063 +/- .054) * 1 sigma uncertainty ellipse (major, minor, PA): ( .064", .054", 75° ) * approx speed of asteroid's shadow [km/s]: 8.3846 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1225-01472-1 by 1672 Gezelle on 2008 Nov 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 -160 0 0 6 9 25 4 46 29 0 74 -7 6 19 56 5 58 54 6 54 8 .. .. .. -159 0 0 6 27 2 4 46 29 1 74 -8 6 37 35 6 16 30 7 11 50 .. .. .. -158 0 0 6 45 3 4 46 28 2 74 -9 6 55 36 6 34 30 7 29 55 .. .. .. -157 0 0 7 3 26 4 46 28 3 74 -10 7 14 1 6 52 53 7 48 24 .. .. .. -156 0 0 7 22 13 4 46 27 4 74 -11 7 32 48 7 11 38 8 7 14 6 37 27 -155 0 0 7 41 21 4 46 25 5 75 -12 7 51 58 7 30 45 8 26 27 6 56 31 -154 0 0 8 0 51 4 46 24 6 75 -13 8 11 29 7 50 14 8 46 2 7 15 56 -153 0 0 8 20 42 4 46 22 7 75 -14 8 31 21 8 10 4 9 5 58 7 35 42 -152 0 0 8 40 54 4 46 20 8 75 -15 8 51 34 8 30 14 9 26 15 7 55 50 -151 0 0 9 1 26 4 46 17 10 75 -16 9 12 7 8 50 46 9 46 52 8 16 17 -150 0 0 9 22 18 4 46 15 11 75 -17 9 33 1 9 11 37 10 7 49 8 37 5 -149 0 0 9 43 30 4 46 12 12 75 -18 9 54 14 9 32 48 10 29 5 8 58 12 -148 0 0 10 5 1 4 46 9 13 76 -19 10 15 46 9 54 17 10 50 41 9 19 38 -147 0 0 10 26 50 4 46 5 14 76 -21 10 37 36 10 16 5 11 12 35 9 41 22 -146 0 0 10 48 58 4 46 2 15 76 -22 10 59 45 10 38 12 11 34 47 10 3 25 -145 0 0 11 11 22 4 45 58 16 76 -23 11 22 11 11 0 35 11 57 17 10 25 45 -144 0 0 11 34 4 4 45 53 17 77 -24 11 44 53 11 23 16 12 20 4 10 48 23 -143 0 0 11 57 3 4 45 49 18 77 -25 12 7 53 11 46 13 12 43 7 11 11 16 -142 0 0 12 20 17 4 45 44 19 77 -26 12 31 8 12 9 27 13 6 26 11 34 26 -141 0 0 12 43 47 4 45 39 20 77 -27 12 54 39 12 32 55 13 30 0 11 57 51 -140 0 0 13 7 31 4 45 34 21 78 -28 13 18 25 12 56 39 13 53 49 12 21 31 -139 0 0 13 31 30 4 45 28 22 78 -29 13 42 24 13 20 36 14 17 52 12 45 25 -138 0 0 13 55 42 4 45 23 23 78 -30 14 6 38 13 44 48 14 42 9 13 9 33 -137 0 0 14 20 8 4 45 17 24 79 -31 14 31 4 14 9 12 15 6 39 13 33 55 -136 0 0 14 44 46 4 45 11 25 79 -32 14 55 43 14 33 49 15 31 21 13 58 28 -135 0 0 15 9 36 4 45 4 26 79 -33 15 20 34 14 58 38 15 56 16 14 23 14 -134 0 0 15 34 37 4 44 57 27 80 -34 15 45 37 15 23 38 16 21 21 14 48 11 -133 0 0 15 59 49 4 44 51 28 80 -35 16 10 49 15 48 49 16 46 37 15 13 19 -132 0 0 16 25 11 4 44 43 29 80 -36 16 36 12 16 14 10 17 12 3 15 38 37 -131 0 0 16 50 42 4 44 36 30 81 -37 17 1 45 16 39 41 17 37 38 16 4 5 -130 0 0 17 16 22 4 44 29 31 81 -38 17 27 26 17 5 20 18 3 22 16 29 41 -129 0 0 17 42 11 4 44 21 32 82 -38 17 53 15 17 31 8 18 29 14 16 55 26 -128 0 0 18 8 7 4 44 13 33 82 -39 18 19 12 17 57 3 18 55 14 17 21 19 -127 0 0 18 34 9 4 44 5 34 83 -40 18 45 15 18 23 5 19 21 20 17 47 18 -126 0 0 19 0 18 4 43 56 35 83 -41 19 11 25 18 49 13 19 47 32 18 13 24 -125 0 0 19 26 33 4 43 48 36 84 -42 19 37 40 19 15 27 20 13 50 18 39 35 -124 0 0 19 52 52 4 43 39 37 84 -43 20 4 0 19 41 45 20 40 12 19 5 51 -123 0 0 20 19 16 4 43 30 37 85 -44 20 30 25 20 8 8 21 6 39 19 32 12 -122 0 0 20 45 43 4 43 21 38 86 -45 20 56 53 20 34 35 21 33 9 19 58 37 -121 0 0 21 12 14 4 43 12 39 86 -46 21 23 24 21 1 5 21 59 42 20 25 5 -120 0 0 21 38 46 4 43 3 40 87 -47 21 49 57 21 27 37 22 26 17 20 51 35 -119 0 0 22 5 20 4 42 53 41 88 -48 22 16 31 21 54 10 22 52 54 21 18 7 -118 0 0 22 31 56 4 42 44 42 88 -49 22 43 7 22 20 45 23 19 31 21 44 40 -117 0 0 22 58 31 4 42 34 43 89 -49 23 9 43 22 47 20 23 46 9 22 11 13 -116 0 0 23 25 6 4 42 24 44 90 -50 23 36 19 23 13 55 24 12 46 22 37 47 -115 0 0 23 51 41 4 42 14 45 91 -51 24 2 54 23 40 29 24 39 22 23 4 19 -114 0 0 24 18 13 4 42 4 46 91 -52 24 29 27 24 7 1 25 5 56 23 30 51 -113 0 0 24 44 44 4 41 53 46 92 -53 24 55 58 24 33 32 25 32 28 23 57 20 -112 0 0 25 11 12 4 41 43 47 93 -54 25 22 26 24 59 59 25 58 57 24 23 47 -111 0 0 25 37 36 4 41 33 48 94 -54 25 48 50 25 26 23 26 25 23 24 50 10 -110 0 0 26 3 56 4 41 22 49 95 -55 26 15 11 25 52 43 26 51 44 25 16 29 -109 0 0 26 30 12 4 41 11 50 96 -56 26 41 27 26 18 59 27 18 0 25 42 44 -108 0 0 26 56 23 4 41 1 51 97 -57 27 7 37 26 45 9 27 44 11 26 8 54 -107 0 0 27 22 27 4 40 50 51 98 -57 27 33 42 27 11 14 28 10 16 26 34 59 -106 0 0 27 48 25 4 40 39 52 100 -58 27 59 40 27 37 12 28 36 14 27 0 57 -105 0 0 28 14 17 4 40 28 53 101 -59 28 25 31 28 3 3 29 2 6 27 26 48 -104 0 0 28 40 0 4 40 17 54 102 -59 28 51 15 28 28 47 29 27 49 27 52 32 -103 0 0 29 5 36 4 40 6 54 103 -60 29 16 51 28 54 23 29 53 25 28 18 8 -102 0 0 29 31 3 4 39 54 55 105 -61 29 42 18 29 19 50 30 18 51 28 43 36 -101 0 0 29 56 22 4 39 43 56 106 -61 30 7 36 29 45 8 30 44 9 29 8 55 -100 0 0 30 21 30 4 39 32 56 107 -62 30 32 44 30 10 17 31 9 16 29 34 4 - 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2008 Oct 29 1 sigma uncertainty ellipse (major, minor, PA): 0.061, 0.049, 73° remarks: * orbital elements for (1672) Gezelle : Mean anomaly = 342.24100123 deg Arg. of pericenter = 255.38281057 deg Long. of node = 181.27929176 deg Inclination = 1.06072313 deg Eccentricity = 0.27231228 Semimajor axis = 3.17860921 AU Perihelion dist = 2.31303489 AU Mag: H = 11.37, G = 0.15 Epoch of elements : MJD 54773.19100000 TDT (2008 Nov 03.191) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 3 1672 Gezelle 4h 35.0m UT 10.7 3 3 26.229 15 58 46.56TYC 1225-01472-1 11.4 14.0 34 4.1 1.401 -1.954 -9.43 -65.6977 15.983 107.15 -15.17 4.5829 -0.13296 0.39787 -4.48793 -1.50160 -0.00067 -0.00006 2000 341.68602420081031.00000255.382811181.279292 1.0607230.27231228 3.1786092 2.313034911.1 5.00.15 RATE 1.7391950 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.064 0.054 75 2.62 0.054 0 54769.5020081103_1472-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 30, 13:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org