IOTA/IOTA-ES occultation update for (447) Valentine / 2UCAC 40155990 event on 2008 Nov 06, 04:48 UT Visible from Europe, N Canada Summary ------- On 2008 Nov 06 UT, the 79 km diameter asteroid (447) Valentine will occult a 12.6 mag star in the constellation Gemini 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 1.5 mag to 13.8 mag (the magnitude of the asteroid) for at most 19.6 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: 91 * date and approx. time of event: 2008 Nov 06, 04:37 - 2008 Nov 06, 05:10 UT * magnitude of target star: 12.6 * magnitude drop [mag]: 1.5 * estimated maximum duration [s]: 19.6 * Moon: 50 % sunlit, 137° distance * Sun: 133° distance * rough path description: Europe, N Canada The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 0.51 * 1 sigma uncertainty interval [seconds]: +/- 11.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .035 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .035", .023", 88° ) * approx speed of asteroid's shadow [km/s]: 4.0318 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 40155990 by 447 Valentine on 2008 Nov 6 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 -155 0 0 52 1 7 5 10 32 1 50 -23 52 34 22 51 28 8 53 8 35 .. .. .. -154 0 0 52 32 29 5 10 32 1 51 -23 53 5 36 51 59 38 53 39 41 51 26 24 -153 0 0 53 3 10 5 10 31 2 51 -24 53 36 9 52 30 27 54 10 7 51 57 21 -152 0 0 53 33 10 5 10 30 3 52 -25 54 6 2 53 0 35 54 39 50 52 27 37 -151 0 0 54 2 30 5 10 28 4 53 -25 54 35 13 53 30 3 55 8 53 52 57 13 -150 0 0 54 31 9 5 10 26 4 54 -26 55 3 44 53 58 51 55 37 16 53 26 9 -149 0 0 54 59 9 5 10 24 5 55 -26 55 31 35 54 26 59 56 4 58 53 54 25 -148 0 0 55 26 29 5 10 22 6 56 -27 55 58 47 54 54 27 56 32 0 54 22 3 -147 0 0 55 53 10 5 10 19 7 56 -27 56 25 19 55 21 17 56 58 23 54 49 1 -146 0 0 56 19 13 5 10 16 7 57 -27 56 51 13 55 47 28 57 24 8 55 15 21 -145 0 0 56 44 37 5 10 13 8 58 -28 57 16 28 56 13 1 57 49 14 55 41 3 -144 0 0 57 9 24 5 10 10 9 59 -28 57 41 6 56 37 57 58 13 42 56 6 7 -143 0 0 57 33 34 5 10 6 9 60 -29 58 5 7 57 2 15 58 37 34 56 30 35 -142 0 0 57 57 7 5 10 2 10 61 -29 58 28 31 57 25 58 59 0 48 56 54 25 -141 0 0 58 20 4 5 9 58 11 61 -29 58 51 19 57 49 4 59 23 27 57 17 40 -140 0 0 58 42 26 5 9 54 11 62 -30 59 13 31 58 11 34 59 45 30 57 40 20 -139 0 0 59 4 12 5 9 50 12 63 -30 59 35 9 58 33 30 60 6 58 58 2 25 -138 0 0 59 25 25 5 9 46 13 64 -31 59 56 12 58 54 51 60 27 52 58 23 55 -137 0 0 59 46 4 5 9 41 13 65 -31 60 16 42 59 15 39 60 48 12 58 44 51 -136 0 0 60 6 9 5 9 37 14 66 -31 60 36 39 59 35 53 61 7 59 59 5 15 -135 0 0 60 25 42 5 9 32 14 67 -32 60 56 3 59 55 35 61 27 14 59 25 5 -134 0 0 60 44 43 5 9 27 15 67 -32 61 14 55 60 14 45 61 45 57 59 44 24 -133 0 0 61 3 13 5 9 22 15 68 -32 61 33 16 60 33 23 62 4 8 60 3 11 -132 0 0 61 21 12 5 9 17 16 69 -32 61 51 6 60 51 31 62 21 49 60 21 27 -131 0 0 61 38 40 5 9 12 16 70 -33 62 8 26 61 9 8 62 39 0 60 39 12 -130 0 0 61 55 39 5 9 6 17 71 -33 62 25 16 61 26 15 62 55 42 60 56 28 -129 0 0 62 12 9 5 9 1 18 72 -33 62 41 37 61 42 53 63 11 54 61 13 14 -128 0 0 62 28 10 5 8 56 18 73 -33 62 57 30 61 59 3 63 27 38 61 29 32 -127 0 0 62 43 43 5 8 50 19 74 -34 63 12 55 62 14 44 63 42 54 61 45 22 -126 0 0 62 58 49 5 8 45 19 75 -34 63 27 52 62 29 58 63 57 43 62 0 43 -125 0 0 63 13 28 5 8 39 20 75 -34 63 42 23 62 44 44 64 12 6 62 15 38 -124 0 0 63 27 40 5 8 33 20 76 -34 63 56 28 62 59 4 64 26 2 62 30 6 -123 0 0 63 41 27 5 8 28 21 77 -34 64 10 6 63 12 58 64 39 32 62 44 7 -122 0 0 63 54 48 5 8 22 21 78 -35 64 23 20 63 26 27 64 52 38 62 57 43 -121 0 0 64 7 44 5 8 16 21 79 -35 64 36 8 63 39 30 65 5 18 63 10 54 -120 0 0 64 20 15 5 8 10 22 80 -35 64 48 32 63 52 9 65 17 35 63 23 40 -119 0 0 64 32 23 5 8 4 22 81 -35 65 0 33 64 4 24 65 29 28 63 36 2 -118 0 0 64 44 7 5 7 58 23 82 -35 65 12 10 64 16 15 65 40 58 63 47 59 -117 0 0 64 55 28 5 7 52 23 83 -35 65 23 24 64 27 42 65 52 4 63 59 34 -116 0 0 65 6 26 5 7 46 24 84 -36 65 34 15 64 38 47 66 2 49 64 10 45 -115 0 0 65 17 2 5 7 40 24 85 -36 65 44 45 64 49 29 66 13 12 64 21 34 -114 0 0 65 27 16 5 7 34 25 86 -36 65 54 53 64 59 50 66 23 13 64 32 1 -113 0 0 65 37 9 5 7 28 25 87 -36 66 4 39 65 9 49 66 32 53 64 42 6 -112 0 0 65 46 41 5 7 22 25 88 -36 66 14 5 65 19 26 66 42 12 64 51 49 -111 0 0 65 55 51 5 7 16 26 89 -36 66 23 10 65 28 43 66 51 11 65 1 11 -110 0 0 66 4 42 5 7 9 26 90 -36 66 31 55 65 37 39 66 59 50 65 10 13 -109 0 0 66 13 13 5 7 3 27 90 -37 66 40 20 65 46 15 67 8 9 65 18 55 -108 0 0 66 21 24 5 6 57 27 91 -37 66 48 25 65 54 31 67 16 9 65 27 16 -107 0 0 66 29 15 5 6 51 27 92 -37 66 56 12 66 2 28 67 23 50 65 35 18 -106 0 0 66 36 48 5 6 44 28 93 -37 67 3 39 66 10 5 67 31 13 65 43 0 -105 0 0 66 44 1 5 6 38 28 94 -37 67 10 48 66 17 23 67 38 17 65 50 23 -104 0 0 66 50 57 5 6 32 28 95 -37 67 17 39 66 24 23 67 45 3 65 57 27 -103 0 0 66 57 34 5 6 25 29 96 -37 67 24 11 66 31 5 67 51 31 66 4 13 -102 0 0 67 3 53 5 6 19 29 97 -37 67 30 26 66 37 28 67 57 41 66 10 40 -101 0 0 67 9 54 5 6 12 30 98 -37 67 36 24 66 43 33 68 3 34 66 16 50 -100 0 0 67 15 38 5 6 6 30 99 -37 67 42 4 66 49 21 68 9 10 66 22 41 - 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2008 Oct 16 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.012, 86° remarks: * orbital elements for (447) Valentine : Mean anomaly = 40.45380544 deg Arg. of pericenter = 321.32043758 deg Long. of node = 72.00893919 deg Inclination = 4.80069834 deg Eccentricity = 0.03948858 Semimajor axis = 2.98667725 AU Perihelion dist = 2.86873762 AU Mag: H = 8.93, G = 0.15 Epoch of elements : MJD 54776.20000000 TDT (2008 Nov 06.200) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 6 447 Valentine 4h 48.8m UT 12.6 6 6 1.919 23 58 45.372UCAC 40155990 0.0 13.8 79 19.6 2.135 -0.623 3.92 -26.4624 23.979 103.72 -16.09 4.8127 0.23503 0.50916 -2.06759 0.95065 -0.00431 0.00001 2000 39.26991020081031.00000321.320438 72.008939 4.8006980.03948858 2.9866773 2.8687376 9.0 5.00.15 RATE 1.9095080 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.035 0.023 88 1.51 0.026 0 54769.5020081106_155990 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 30, 14:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org