Grazing Occultation of 2784 cK1 Magnitude 3.3 2784 = tau Sagittarii Date 2006 March 23 (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 145 0 0 -41 34 9 16 28 3 29 102 1.77 181.0 187.60 8.68S 145 10 0 -41 38 44 16 28 12 30 102 1.76 181.0 187.60 8.68S 145 20 0 -41 43 18 16 28 21 30 102 1.75 181.0 187.57 8.64S 145 30 0 -41 47 51 16 28 31 30 102 1.74 181.0 187.55 8.62S 145 40 0 -41 52 24 16 28 40 30 102 1.72 180.9 187.53 8.60S 145 50 0 -41 56 55 16 28 50 30 101 1.71 180.9 187.51 8.58S 146 0 0 -42 1 26 16 28 59 30 101 1.70 180.9 187.49 8.56S 146 10 0 -42 5 56 16 29 8 31 101 1.69 180.9 187.46 8.54S 146 20 0 -42 10 25 16 29 18 31 101 1.68 180.9 187.44 8.52S 146 30 0 -42 14 53 16 29 28 31 101 1.67 180.8 187.42 8.50S 146 40 0 -42 19 20 16 29 37 31 101 1.66 180.8 187.40 8.48S 146 50 0 -42 23 46 16 29 47 31 100 1.65 180.8 187.38 8.46S 147 0 0 -42 28 11 16 29 56 31 100 1.64 180.8 187.36 8.44S 147 10 0 -42 32 35 16 30 6 32 100 1.63 180.7 187.34 8.41S 147 20 0 -42 36 59 16 30 16 32 100 1.62 180.7 187.32 8.39S 147 30 0 -42 41 21 16 30 26 32 100 1.61 180.7 187.29 8.37S 147 40 0 -42 45 43 16 30 35 32 100 1.60 180.7 187.27 8.35S 147 50 0 -42 50 3 16 30 45 32 99 1.59 180.7 187.25 8.33S Path coordinates are referred to WGS84 (as used by GPS). 2784 is double : 4.2 4.2 0.004" 235.2 Graze Path of component #2 0.00km North, and 0.0 secs. earlier cf. primary. Librations Long -5.77 Lat +6.33 P +186.6 D +7.3 Illumination of moon 40%- Elongation of Moon 78 Vertical Profile Scale 2.03 km/arcsec at mean distance of moon Horizontal Scale Factor 1.82 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 4.3 5.7 7.2 8.0 8.5 8.8 9.1 9.3 6.3 5.7 7.2 8.0 8.5 8.9 9.1 9.3 8.3 5.8 7.2 8.0 8.5 8.9 9.1 9.3 10.3 5.8 7.2 8.0 8.5 8.9 9.1 9.3 12.3 5.8 7.2 8.0 8.5 8.9 9.2 9.4