IOTA/IOTA-ES occultation update for (478) Tergeste / TYC 0766-01138-1 event on 2012 Nov 28, 04:46 UT Visible from Europe, Africa, Brazil, Argentina, Chile Summary ------- On 2012 Nov 28 UT, the 86 km diameter asteroid (478) Tergeste will occult a 11.7 mag star in the constellation Canis Minor for observers along a path across Europe, Africa, Brazil, Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.2 mag to 12.5 mag (the magnitude of the asteroid) for at most 10.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 90 * date and approx. time of event: 2012 Nov 28, 04:34 - 2012 Nov 28, 04:59 UT * geocentric midpoint of event [JD]: 2456259.69910833 * magnitude of target star: 11.7 * magnitude drop [mag]: 1.2 * estimated maximum duration [s]: 10.7 * Moon: 100 % sunlit, 47° distance * Sun: 137° distance * rough path description: Europe, Africa, Brazil, Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 86 * 1 sigma uncertainty interval [path widths]: +/- 0.53 * 1 sigma uncertainty interval [seconds]: +/- 5.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .029", 96° ) * approx speed of asteroid's shadow [km/s]: 8.0047 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0766-01138-1 by 478 Tergeste on 2012 Nov 28 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 ' " Longitude Longitude Longitude Longitude -110 17 42 -50 0 0 4 59 56 1 73 -13 ... .. .. -108 19 26 ... .. .. -106 22 46 -105 45 15 -49 0 0 4 59 54 4 69 -16 -107 30 26 -104 5 46 -109 29 34 -102 25 33 Latitude Latitude Latitude Latitude -105 0 0 -48 48 50 4 59 53 5 69 -16 -48 23 56 -49 13 45 -47 57 34 -49 40 10 -104 0 0 -48 33 29 4 59 52 5 68 -16 -48 8 28 -48 58 30 -47 41 58 -49 25 3 -103 0 0 -48 17 30 4 59 51 6 67 -17 -47 52 22 -48 42 39 -47 25 44 -49 9 19 -102 0 0 -48 0 52 4 59 50 7 67 -17 -47 35 37 -48 26 9 -47 8 51 -48 52 57 -101 0 0 -47 43 36 4 59 49 8 66 -18 -47 18 12 -48 9 0 -46 51 19 -48 35 57 -100 0 0 -47 25 39 4 59 47 8 65 -19 -47 0 8 -47 51 12 -46 33 6 -48 18 17 - 99 0 0 -47 7 3 4 59 46 9 64 -19 -46 41 23 -47 32 43 -46 14 12 -47 59 57 - 98 0 0 -46 47 45 4 59 44 10 64 -20 -46 21 57 -47 13 34 -45 54 37 -47 40 57 - 97 0 0 -46 27 45 4 59 42 11 63 -20 -46 1 48 -46 53 43 -45 34 19 -47 21 15 - 96 0 0 -46 7 3 4 59 40 11 62 -21 -45 40 57 -46 33 9 -45 13 19 -47 0 51 - 95 0 0 -45 45 37 4 59 38 12 62 -21 -45 19 23 -46 11 53 -44 51 35 -46 39 45 - 94 0 0 -45 23 28 4 59 36 13 61 -22 -44 57 4 -45 49 53 -44 29 6 -46 17 54 - 93 0 0 -45 0 34 4 59 33 14 60 -22 -44 34 0 -45 27 8 -44 5 53 -45 55 20 - 92 0 0 -44 36 54 4 59 30 15 59 -23 -44 10 11 -45 3 38 -43 41 53 -45 32 0 - 91 0 0 -44 12 28 4 59 27 15 59 -23 -43 45 35 -44 39 22 -43 17 7 -45 7 55 - 90 0 0 -43 47 15 4 59 24 16 58 -24 -43 20 12 -44 14 19 -42 51 33 -44 43 3 - 89 0 0 -43 21 14 4 59 21 17 57 -25 -42 54 1 -43 48 29 -42 25 11 -44 17 23 - 88 0 0 -42 54 25 4 59 18 18 57 -25 -42 27 1 -43 21 50 -41 58 0 -43 50 55 - 87 0 0 -42 26 46 4 59 14 19 56 -26 -41 59 12 -42 54 22 -41 30 0 -43 23 39 - 86 0 0 -41 58 17 4 59 10 20 55 -26 -41 30 32 -42 26 4 -41 1 9 -42 55 32 - 85 0 0 -41 28 58 4 59 6 20 55 -27 -41 1 2 -41 56 55 -40 31 26 -42 26 35 - 84 0 0 -40 58 46 4 59 1 21 54 -28 -40 30 39 -41 26 55 -40 0 53 -41 56 46 - 83 0 0 -40 27 42 4 58 57 22 53 -28 -39 59 24 -40 56 2 -39 29 26 -41 26 6 - 82 0 0 -39 55 46 4 58 52 23 53 -29 -39 27 16 -40 24 17 -38 57 6 -40 54 32 - 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2012 Nov 08 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.012, 104° remarks: * orbital elements for (478) Tergeste : Mean anomaly = 344.72979807 deg Arg. of pericenter = 239.18386853 deg Long. of node = 233.93728180 deg Inclination = 13.18624405 deg Eccentricity = 0.08501192 Semimajor axis = 3.01819129 AU Perihelion dist = 2.76160906 AU Mag: H = 7.93, G = 0.15 Epoch of elements : MJD 56259.19900000 TDT (2012 Nov 28.199) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 28 478 Tergeste 4h 46.7m UT 11.7 7 12 8.637 10 8 49.19TYC 0766-01138-1 12.4 12.5 86 10.7 1.972 -0.925 -14.84 -31.1378 10.151 105.33 -21.37 4.7786 0.04818 -0.04545 -3.05679 -3.32698 -0.00379 0.00141 2000 343.00068020121119.00000239.183869233.937282 13.1862440.08501192 3.0181913 2.7616091 8.0 5.00.15 RATE 1.8796800 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.029 96 1.53 0.032 0 0-4 2 056247.0020121128_1138-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 09:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org