Grazing Occultation of 1213 CA2 Magnitude 7.1 Date 2006 April 6 (Thursday) Nominal site altitude 0m E. Longit. Latitude U.T. Sun Moon TanZ PA WA CA o ' " o ' " h m s Alt Alt Az o o o 113 0 0 -21 0 57 11 57 43 42 353 1.09 26.5 15.45 13.58N 113 10 0 -21 8 15 11 58 12 42 352 1.10 26.5 15.50 13.64N 113 20 0 -21 15 36 11 58 42 42 352 1.10 26.6 15.56 13.69N 113 30 0 -21 22 59 11 59 11 42 352 1.11 26.6 15.62 13.75N 113 40 0 -21 30 24 11 59 40 42 351 1.12 26.7 15.67 13.81N 113 50 0 -21 37 52 12 0 9 42 351 1.12 26.7 15.73 13.86N 114 0 0 -21 45 22 12 0 38 41 351 1.13 26.8 15.78 13.91N 114 10 0 -21 52 55 12 1 7 41 350 1.14 26.8 15.83 13.96N 114 20 0 -22 0 29 12 1 35 41 350 1.14 26.9 15.88 14.01N 114 30 0 -22 8 6 12 2 4 41 350 1.15 26.9 15.93 14.06N 114 40 0 -22 15 45 12 2 32 41 349 1.16 27.0 15.98 14.11N 114 50 0 -22 23 26 12 3 1 41 349 1.17 27.0 16.02 14.16N 115 0 0 -22 31 9 12 3 29 40 349 1.17 27.1 16.07 14.20N 115 10 0 -22 38 54 12 3 57 40 348 1.18 27.1 16.11 14.25N 115 20 0 -22 46 41 12 4 25 40 348 1.19 27.2 16.16 14.29N 115 30 0 -22 54 29 12 4 53 40 348 1.20 27.2 16.20 14.33N 115 40 0 -23 2 20 12 5 21 40 347 1.20 27.2 16.24 14.37N 115 50 0 -23 10 12 12 5 49 40 347 1.21 27.3 16.28 14.41N 116 0 0 -23 18 6 12 6 17 39 347 1.22 27.3 16.32 14.45N Path coordinates are referred to WGS84 (as used by GPS). 1213 is double : 7.7 7.9 0.90" 76.0 Graze Path of component #2 1.45km South, and 2.2 secs. later cf. primary. Librations Long +4.79 Lat -6.89 P +15.8 D +8.2 Illumination of moon 59%+ Elongation of Moon 101 Vertical Profile Scale 2.54 km/arcsec at mean distance of moon Horizontal Scale Factor 1.18 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 10.5 5.7 7.1 7.9 8.4 8.8 9.0 9.2 12.5 5.7 7.1 7.9 8.4 8.8 9.0 9.2 14.5 5.7 7.2 7.9 8.5 8.8 9.1 9.3 16.5 5.7 7.2 8.0 8.5 8.8 9.1 9.3 18.5 5.7 7.2 8.0 8.5 8.8 9.1 9.3