IOTA/IOTA-ES occultation update for (1517) Beograd / TYC 1851-00722-1 event on 2012 Nov 17, 03:52 UT Visible from Europe, N Canada Summary ------- On 2012 Nov 17 UT, the 38 km diameter asteroid (1517) Beograd will occult a 11.5 mag star in the constellation Taurus for observers along a path across Europe, N Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.8 mag to 15.3 mag (the magnitude of the asteroid) for at most 3.8 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: 32 * date and approx. time of event: 2012 Nov 17, 03:45 - 2012 Nov 17, 04:00 UT * geocentric midpoint of event [JD]: 2456248.66135 * magnitude of target star: 11.5 * magnitude drop [mag]: 3.8 * estimated maximum duration [s]: 3.8 * Moon: 15 % sunlit, 161° distance * Sun: 153° distance * rough path description: Europe, N Canada The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 2.09 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .048 +/- .059) * 1 sigma uncertainty ellipse (major, minor, PA): ( .059", .048", 359° ) * approx speed of asteroid's shadow [km/s]: 10.0669 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1851-00722-1 by 1517 Beograd on 2012 Nov 17 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 -149 0 0 42 22 53 4 0 21 0 57 -16 42 39 0 42 6 51 43 47 12 .. .. .. -148 0 0 42 52 41 4 0 21 1 57 -17 43 8 48 42 36 38 44 17 3 .. .. .. -147 0 0 43 22 18 4 0 21 2 58 -18 43 38 26 43 6 15 44 46 44 .. .. .. -146 0 0 43 51 44 4 0 20 3 59 -19 44 7 52 43 35 40 45 16 12 .. .. .. -145 0 0 44 20 57 4 0 19 4 59 -19 44 37 6 44 4 53 45 45 27 .. .. .. -144 0 0 44 49 57 4 0 18 5 60 -20 45 6 6 44 33 52 46 14 28 .. .. .. -143 0 0 45 18 43 4 0 17 6 61 -21 45 34 52 45 2 38 46 43 15 .. .. .. -142 0 0 45 47 14 4 0 16 6 61 -22 46 3 23 45 31 10 47 11 46 44 24 47 -141 0 0 46 15 30 4 0 14 7 62 -22 46 31 39 45 59 26 47 40 2 44 53 3 -140 0 0 46 43 30 4 0 13 8 63 -23 46 59 39 46 27 26 48 8 1 45 21 5 -139 0 0 47 11 14 4 0 11 9 64 -24 47 27 22 46 55 10 48 35 42 45 48 50 -138 0 0 47 38 40 4 0 9 10 64 -24 47 54 48 47 22 37 49 3 6 46 16 19 -137 0 0 48 5 48 4 0 7 11 65 -25 48 21 56 47 49 46 49 30 11 46 43 30 -136 0 0 48 32 38 4 0 5 11 66 -26 48 48 45 48 16 36 49 56 57 47 10 24 -135 0 0 48 59 9 4 0 2 12 67 -26 49 15 15 48 43 8 50 23 23 47 36 59 -134 0 0 49 25 21 4 0 0 13 67 -27 49 41 26 49 9 21 50 49 30 48 3 16 -133 0 0 49 51 13 3 59 57 14 68 -28 50 7 16 49 35 14 51 15 16 48 29 13 -132 0 0 50 16 45 3 59 55 14 69 -28 50 32 47 50 0 47 51 40 42 48 54 50 -131 0 0 50 41 56 3 59 52 15 70 -29 50 57 57 50 25 59 52 5 46 49 20 8 -130 0 0 51 6 46 3 59 49 16 71 -29 51 22 46 50 50 51 52 30 29 49 45 5 -129 0 0 51 31 15 3 59 46 17 71 -30 51 47 13 51 15 21 52 54 50 50 9 41 -128 0 0 51 55 22 3 59 43 17 72 -31 52 11 19 51 39 30 53 18 49 50 33 57 -127 0 0 52 19 8 3 59 40 18 73 -31 52 35 3 52 3 17 53 42 26 50 57 51 -126 0 0 52 42 32 3 59 36 19 74 -32 52 58 25 52 26 43 54 5 40 51 21 23 -125 0 0 53 5 33 3 59 33 19 75 -32 53 21 24 52 49 46 54 28 31 51 44 34 -124 0 0 53 28 12 3 59 29 20 76 -33 53 44 2 53 12 27 54 51 0 52 7 23 -123 0 0 53 50 29 3 59 26 21 77 -33 54 6 16 53 34 46 55 13 6 52 29 49 -122 0 0 54 12 23 3 59 22 21 77 -34 54 28 8 53 56 42 55 34 49 52 51 54 -121 0 0 54 33 54 3 59 19 22 78 -34 54 49 37 54 18 15 55 56 8 53 13 36 -120 0 0 54 55 2 3 59 15 23 79 -35 55 10 43 54 39 26 56 17 5 53 34 55 -119 0 0 55 15 48 3 59 11 23 80 -35 55 31 26 55 0 13 56 37 38 53 55 52 -118 0 0 55 36 10 3 59 7 24 81 -35 55 51 47 55 20 38 56 57 48 54 16 27 -117 0 0 55 56 10 3 59 4 24 82 -36 56 11 44 55 40 41 57 17 35 54 36 38 -116 0 0 56 15 47 3 59 0 25 83 -36 56 31 19 56 0 20 57 36 59 54 56 28 -115 0 0 56 35 1 3 58 56 26 84 -37 56 50 30 56 19 37 57 56 0 55 15 54 -114 0 0 56 53 53 3 58 52 26 85 -37 57 9 19 56 38 30 58 14 37 55 34 58 -113 0 0 57 12 21 3 58 48 27 86 -37 57 27 45 56 57 2 58 32 52 55 53 40 -112 0 0 57 30 27 3 58 44 27 87 -38 57 45 49 57 15 10 58 50 44 56 11 59 -111 0 0 57 48 11 3 58 40 28 88 -38 58 3 29 57 32 57 59 8 14 56 29 56 -110 0 0 58 5 32 3 58 36 28 89 -38 58 20 48 57 50 20 59 25 20 56 47 31 -109 0 0 58 22 31 3 58 31 29 90 -39 58 37 44 58 7 22 59 42 5 57 4 43 -108 0 0 58 39 8 3 58 27 29 91 -39 58 54 18 58 24 1 59 58 27 57 21 33 -107 0 0 58 55 22 3 58 23 30 92 -39 59 10 30 58 40 19 60 14 27 57 38 1 -106 0 0 59 11 15 3 58 19 30 93 -40 59 26 20 58 56 14 60 30 5 57 54 8 -105 0 0 59 26 46 3 58 15 31 94 -40 59 41 48 59 11 48 60 45 22 58 9 53 -104 0 0 59 41 56 3 58 11 31 95 -40 59 56 55 59 27 0 61 0 17 58 25 16 -103 0 0 59 56 44 3 58 6 32 96 -40 60 11 41 59 41 51 61 14 50 58 40 18 -102 0 0 60 11 11 3 58 2 32 97 -41 60 26 5 59 56 21 61 29 3 58 54 59 -101 0 0 60 25 17 3 57 58 33 98 -41 60 40 9 60 10 30 61 42 54 59 9 19 -100 0 0 60 39 3 3 57 54 33 99 -41 60 53 51 60 24 18 61 56 25 59 23 18 - 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2012 Oct 09 1 sigma uncertainty ellipse (major, minor, PA): 0.038, 0.022, 82° remarks: * orbital elements for (1517) Beograd : Mean anomaly = 133.59222224 deg Arg. of pericenter = 231.85158754 deg Long. of node = 63.93297247 deg Inclination = 5.28061449 deg Eccentricity = 0.04286109 Semimajor axis = 2.71983589 AU Perihelion dist = 2.60326075 AU Mag: H = 11.08, G = 0.15 Epoch of elements : MJD 56248.16100000 TDT (2012 Nov 17.161) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 17 1517 Beograd 3h 52.3m UT 11.5 5 24 40.251 24 24 6.91TYC 1851-00722-1 12.1 15.3 38 3.8 1.886 -1.927 3.17 -33.5330 24.402 118.17 -19.06 3.8724 0.07559 0.64263 -5.64128 0.67958 -0.00265 -0.00028 2000 131.799003201211 9.00000231.851588 63.932972 5.2806140.04286109 2.7198359 2.603260811.1 5.00.15 RATE 2.1973030 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.059 0.048 359 3.09 0.058 0 0 4-3 056226.0020121117_0722-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org