Grazing Occultation of 1837 K2 Magnitude 7.4 Date 2005 September 6 (Tuesday) 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 114 0 0 -31 15 3 10 37 27 -6 22 278 2.47 31.3 10.12 8.63N 114 10 0 -31 16 14 10 37 36 -7 22 278 2.49 31.2 10.08 8.59N 114 20 0 -31 17 24 10 37 45 -7 22 278 2.51 31.2 10.03 8.54N 114 30 0 -31 18 33 10 37 54 -7 22 278 2.54 31.1 9.98 8.49N 114 40 0 -31 19 41 10 38 2 -7 21 278 2.56 31.1 9.93 8.44N 114 50 0 -31 20 48 10 38 11 -7 21 278 2.58 31.0 9.88 8.39N 115 0 0 -31 21 54 10 38 19 -8 21 277 2.61 31.0 9.83 8.34N 115 10 0 -31 22 58 10 38 28 -8 21 277 2.63 30.9 9.78 8.29N 115 20 0 -31 24 2 10 38 36 -8 21 277 2.65 30.9 9.74 8.25N 115 30 0 -31 25 4 10 38 45 -8 20 277 2.68 30.9 9.69 8.20N 115 40 0 -31 26 5 10 38 53 -8 20 277 2.70 30.8 9.64 8.15N 115 50 0 -31 27 5 10 39 1 -8 20 277 2.73 30.8 9.59 8.10N 116 0 0 -31 28 5 10 39 9 -9 20 277 2.75 30.7 9.54 8.05N 116 10 0 -31 29 3 10 39 17 -9 20 277 2.78 30.7 9.50 8.01N 116 20 0 -31 30 0 10 39 25 -9 20 277 2.81 30.6 9.45 7.96N 116 30 0 -31 30 55 10 39 33 -9 19 276 2.83 30.6 9.40 7.91N 116 40 0 -31 31 50 10 39 41 -9 19 276 2.86 30.5 9.36 7.87N 116 50 0 -31 32 44 10 39 48 -9 19 276 2.89 30.5 9.31 7.82N 117 0 0 -31 33 37 10 39 56 -10 19 276 2.92 30.4 9.26 7.77N 117 10 0 -31 34 28 10 40 4 -10 19 276 2.94 30.4 9.22 7.73N 117 20 0 -31 35 19 10 40 11 -10 19 276 2.97 30.3 9.17 7.68N 117 30 0 -31 36 8 10 40 18 -10 18 276 3.00 30.3 9.12 7.63N 117 40 0 -31 36 57 10 40 26 -10 18 276 3.03 30.2 9.08 7.59N 117 50 0 -31 37 44 10 40 33 -10 18 276 3.06 30.2 9.03 7.54N Path coordinates are referred to WGS84 (as used by GPS). Librations Long -5.81 Lat -0.21 P +9.1 D -0.4 Illumination of moon 6%+ Elongation of Moon 29 Vertical Profile Scale 1.87 km/arcsec at mean distance of moon Horizontal Scale Factor 1.72 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 3.5 7.1 8.5 9.3 9.9 10.2 10.5 10.7 5.5 7.1 8.6 9.4 9.9 10.3 10.5 10.7 7.5 7.1 8.6 9.4 9.9 10.3 10.5 10.7 9.5 7.1 8.6 9.4 9.9 10.3 10.6 10.8 11.5 7.1 8.6 9.4 9.9 10.3 10.6 10.8