IOTA/IOTA-ES occultation update for (1492) Oppolzer / TYC 1335-01558-1 event on 2008 Jan 08, 03:28 UT Visible from Brazil, Colombia Summary ------- On 2008 Jan 08 UT, the 12 km diameter asteroid (1492) Oppolzer will occult a 10.5 mag star in the constellation Gemini for observers along a path across Brazil, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.5 mag (the magnitude of the asteroid) for at most 1.1 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: 18 * date and approx. time of event: 2008 Jan 08, 03:19 - 2008 Jan 08, 03:37 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 1.1 * Moon: 0 % sunlit, 170° distance * Sun: 172° distance * rough path description: Brazil, Colombia The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 3.67 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .054 +/- .047) * 1 sigma uncertainty ellipse (major, minor, PA): ( .054", .047", 93° ) * approx speed of asteroid's shadow [km/s]: 11.1565 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1335-01558-1 by 1492 Oppolzer on 2008 Jan 08 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 -147 0 0 - 2 27 48 3 37 36 1 73 5 - 2 24 14 - 2 31 22 .. .. .. - 2 57 38 -146 0 0 - 2 9 46 3 37 36 2 73 4 - 2 6 12 - 2 13 20 .. .. .. - 2 39 32 -145 0 0 - 1 52 3 3 37 36 3 73 3 - 1 48 30 - 1 55 37 .. .. .. - 2 21 47 -144 0 0 - 1 34 41 3 37 35 4 73 2 - 1 31 8 - 1 38 15 - 1 5 5 - 2 4 22 -143 0 0 - 1 17 40 3 37 34 5 73 1 - 1 14 7 - 1 21 13 - 0 48 7 - 1 47 18 -142 0 0 - 1 0 59 3 37 33 6 73 0 - 0 57 27 - 1 4 32 - 0 31 29 - 1 30 35 -141 0 0 - 0 44 40 3 37 32 7 73 -1 - 0 41 8 - 0 48 12 - 0 15 12 - 1 14 13 -140 0 0 - 0 28 42 3 37 31 8 73 -2 - 0 25 10 - 0 32 14 0 0 43 - 0 58 12 -139 0 0 - 0 13 5 3 37 29 9 73 -3 - 0 9 33 - 0 16 36 0 16 18 - 0 42 32 -138 0 0 0 2 10 3 37 27 10 73 -4 0 5 42 - 0 1 21 0 31 30 - 0 27 14 -137 0 0 0 17 4 3 37 25 11 73 -5 0 20 35 0 13 33 0 46 21 - 0 12 18 -136 0 0 0 31 35 3 37 23 12 73 -6 0 35 6 0 28 5 1 0 50 0 2 16 -135 0 0 0 45 45 3 37 21 13 73 -7 0 49 15 0 42 14 1 14 57 0 16 28 -134 0 0 0 59 32 3 37 18 14 73 -8 1 3 2 0 56 2 1 28 42 0 30 18 -133 0 0 1 12 57 3 37 16 15 73 -9 1 16 27 1 9 27 1 42 4 0 43 45 -132 0 0 1 25 59 3 37 13 16 73 -10 1 29 29 1 22 30 1 55 4 0 56 50 -131 0 0 1 38 39 3 37 10 17 73 -11 1 42 8 1 35 10 2 7 41 1 9 32 -130 0 0 1 50 56 3 37 7 18 73 -12 1 54 25 1 47 27 2 19 56 1 21 51 -129 0 0 2 2 51 3 37 3 19 73 -13 2 6 19 1 59 22 2 31 49 1 33 48 -128 0 0 2 14 22 3 37 0 20 73 -14 2 17 51 2 10 54 2 43 18 1 45 22 -127 0 0 2 25 31 3 36 56 21 73 -15 2 28 59 2 22 3 2 54 24 1 56 33 -126 0 0 2 36 16 3 36 52 22 73 -16 2 39 44 2 32 48 3 5 8 2 7 20 -125 0 0 2 46 39 3 36 48 23 73 -17 2 50 7 2 43 11 3 15 28 2 17 45 -124 0 0 2 56 38 3 36 44 24 73 -18 3 0 6 2 53 11 3 25 26 2 27 46 -123 0 0 3 6 15 3 36 40 25 73 -19 3 9 42 3 2 47 3 35 0 2 37 24 -122 0 0 3 15 28 3 36 35 26 73 -20 3 18 54 3 12 0 3 44 11 2 46 39 -121 0 0 3 24 17 3 36 31 27 73 -21 3 27 44 3 20 50 3 52 59 2 55 30 -120 0 0 3 32 44 3 36 26 28 73 -22 3 36 10 3 29 17 4 1 24 3 3 58 -119 0 0 3 40 47 3 36 21 29 73 -23 3 44 13 3 37 20 4 9 25 3 12 3 -118 0 0 3 48 26 3 36 16 30 73 -24 3 51 52 3 45 0 4 17 4 3 19 44 -117 0 0 3 55 42 3 36 11 31 73 -25 3 59 8 3 52 16 4 24 18 3 27 2 -116 0 0 4 2 35 3 36 6 32 72 -26 4 6 1 3 59 9 4 31 10 3 33 56 -115 0 0 4 9 5 3 36 0 33 72 -27 4 12 30 4 5 39 4 37 38 3 40 27 -114 0 0 4 15 11 3 35 54 34 72 -28 4 18 36 4 11 45 4 43 43 3 46 34 -113 0 0 4 20 53 3 35 49 35 72 -29 4 24 18 4 17 28 4 49 24 3 52 18 -112 0 0 4 26 12 3 35 43 36 72 -30 4 29 37 4 22 47 4 54 42 3 57 38 -111 0 0 4 31 8 3 35 37 37 72 -31 4 34 33 4 27 42 4 59 36 4 2 34 -110 0 0 4 35 40 3 35 31 38 72 -32 4 39 5 4 32 15 5 4 7 4 7 7 -109 0 0 4 39 48 3 35 24 39 72 -32 4 43 13 4 36 23 5 8 15 4 11 17 -108 0 0 4 43 33 3 35 18 39 72 -33 4 46 58 4 40 8 5 11 59 4 15 3 -107 0 0 4 46 55 3 35 12 40 72 -34 4 50 20 4 43 30 5 15 20 4 18 25 -106 0 0 4 49 53 3 35 5 41 72 -35 4 53 18 4 46 29 5 18 18 4 21 24 -105 0 0 4 52 28 3 34 58 42 71 -36 4 55 53 4 49 3 5 20 52 4 24 0 -104 0 0 4 54 40 3 34 51 43 71 -37 4 58 4 4 51 15 5 23 3 4 26 12 -103 0 0 4 56 28 3 34 44 44 71 -38 4 59 52 4 53 3 5 24 51 4 28 0 -102 0 0 4 57 52 3 34 37 45 71 -39 5 1 17 4 54 28 5 26 15 4 29 25 -101 0 0 4 58 54 3 34 30 46 71 -40 5 2 18 4 55 29 5 27 16 4 30 27 -100 0 0 4 59 32 3 34 23 47 70 -41 5 2 56 4 56 7 5 27 54 4 31 5 - 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2007 Dec 10 1 sigma uncertainty ellipse (major, minor, PA): 0.051, 0.042, 93° remarks: * orbital elements for (1492) Oppolzer : Mean anomaly = 257.56661340 deg Arg. of pericenter = 81.35187634 deg Long. of node = 137.84487452 deg Inclination = 6.05592206 deg Eccentricity = 0.11590891 Semimajor axis = 2.17341226 AU Perihelion dist = 1.92149442 AU Mag: H = 12.90, G = 0.15 Epoch of elements : MJD 54473.14500000 TDT (2008 Jan 08.145) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 08 1492 Oppolzer 3h 28.5m UT 10.5 6 51 26.798 16 58 30.60TYC 1335-01558-1 11.4 15.5 12 1.1 1.276 -2.931 10.75 -56.335 16.972 129.46 -22.33 3.4750 -.07295 -.28507 -6.10089 1.55934 0.00052 0.00055 2000 256.5992002008 1 5.00000 81.351876137.844875 6.0559220.115908912.173412261.9214944212.95 0.15 RATE 3.0760330 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.054 0.047 92.6 4.670 0.048 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org