Grazing Occultation of 810 SB7 Magnitude 1.6 810 = El Nath = beta Tauri Date 2005 December 15 (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 149 0 0 -41 38 32 14 3 17 20 358 2.77 173.2 176.30 82.79S 148 50 0 -41 40 46 14 2 52 20 358 2.77 173.2 176.23 82.85S 148 40 0 -41 43 5 14 2 28 20 358 2.78 173.1 176.17 82.92S 148 30 0 -41 45 29 14 2 4 20 358 2.78 173.0 176.10 82.99S 148 20 0 -41 47 57 14 1 39 20 359 2.79 173.0 176.03 83.05S 148 10 0 -41 50 30 14 1 15 20 359 2.79 172.9 175.97 83.12S 148 0 0 -41 53 8 14 0 51 20 359 2.80 172.8 175.91 83.18S 147 50 0 -41 55 50 14 0 27 20 359 2.81 172.8 175.84 83.24S 147 40 0 -41 58 37 14 0 3 20 360 2.81 172.7 175.78 83.31S 147 30 0 -42 1 28 13 59 39 20 360 2.82 172.6 175.71 83.37S 147 20 0 -42 4 24 13 59 15 19 0 2.83 172.6 175.65 83.44S 147 10 0 -42 7 25 13 58 51 19 0 2.84 172.5 175.59 83.50S 147 0 0 -42 10 30 13 58 28 19 1 2.84 172.4 175.53 83.56S 146 50 0 -42 13 40 13 58 4 19 1 2.85 172.4 175.47 83.62S 146 40 0 -42 16 54 13 57 40 19 1 2.86 172.3 175.40 83.68S 146 30 0 -42 20 13 13 57 17 19 1 2.87 172.3 175.34 83.75S 146 20 0 -42 23 36 13 56 53 19 2 2.88 172.2 175.28 83.81S 146 10 0 -42 27 4 13 56 30 19 2 2.89 172.1 175.22 83.87S 146 0 0 -42 30 36 13 56 7 19 2 2.90 172.1 175.16 83.93S 145 50 0 -42 34 13 13 55 44 19 2 2.91 172.0 175.10 83.98S 145 40 0 -42 37 54 13 55 21 19 3 2.93 172.0 175.05 84.04S 145 30 0 -42 41 40 13 54 58 19 3 2.94 171.9 174.99 84.10S 145 20 0 -42 45 30 13 54 35 19 3 2.95 171.9 174.93 84.16S 145 10 0 -42 49 25 13 54 12 19 3 2.96 171.8 174.87 84.22S 145 0 0 -42 53 23 13 53 50 19 4 2.98 171.7 174.82 84.27S 145 10 0 -42 49 24 13 54 12 19 3 2.96 171.8 174.87 84.22S 145 20 0 -42 45 30 13 54 35 19 3 2.95 171.9 174.93 84.16S 145 30 0 -42 41 40 13 54 58 19 3 2.94 171.9 174.99 84.10S 145 40 0 -42 37 54 13 55 21 19 3 2.93 172.0 175.05 84.04S 145 50 0 -42 34 13 13 55 44 19 2 2.91 172.0 175.10 83.98S 146 0 0 -42 30 36 13 56 7 19 2 2.90 172.1 175.16 83.93S 146 10 0 -42 27 4 13 56 30 19 2 2.89 172.1 175.22 83.87S 146 20 0 -42 23 36 13 56 53 19 2 2.88 172.2 175.28 83.81S 146 30 0 -42 20 13 13 57 17 19 1 2.87 172.3 175.34 83.75S 146 40 0 -42 16 54 13 57 40 19 1 2.86 172.3 175.40 83.68S 146 50 0 -42 13 40 13 58 4 19 1 2.85 172.4 175.47 83.62S 147 0 0 -42 10 30 13 58 28 19 1 2.84 172.4 175.53 83.56S 147 10 0 -42 7 25 13 58 51 19 0 2.84 172.5 175.59 83.50S 147 20 0 -42 4 24 13 59 15 19 0 2.83 172.6 175.65 83.44S 147 30 0 -42 1 28 13 59 39 20 360 2.82 172.6 175.71 83.37S 147 40 0 -41 58 37 14 0 3 20 360 2.81 172.7 175.78 83.31S 147 50 0 -41 55 50 14 0 27 20 359 2.81 172.8 175.84 83.24S 148 0 0 -41 53 8 14 0 51 20 359 2.80 172.8 175.91 83.18S 148 10 0 -41 50 30 14 1 15 20 359 2.79 172.9 175.97 83.12S 148 20 0 -41 47 57 14 1 39 20 359 2.79 173.0 176.03 83.05S 148 30 0 -41 45 29 14 2 4 20 358 2.78 173.0 176.10 82.99S 148 40 0 -41 43 5 14 2 28 20 358 2.78 173.1 176.17 82.92S 148 50 0 -41 40 46 14 2 52 20 358 2.77 173.2 176.23 82.85S Path coordinates are referred to WGS84 (as used by GPS). 810 is triple : 2.6 2.6 0.100" 270.0 : 1.6 33" 239.0 Graze Path of component #2 0.06km South, and 0.3 secs. earlier cf. primary. Graze Path of component #3 71.12km North, and 86.8 secs. earlier cf. primary. C A S S I N I R E G I O N G R A Z E Librations Long +4.48 Lat -7.10 P +175.7 D -6.5 Illumination of moon 100%+ Elongation of Moon 174 Vertical Profile Scale 5.37 km/arcsec at mean distance of moon Horizontal Scale Factor 1.31 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 78.9 4.1 5.5 6.1 6.5 6.8 6.9 7.1 80.9 4.1 5.5 6.2 6.5 6.8 7.0 7.1 82.9 4.1 5.5 6.2 6.6 6.8 7.0 7.1 84.9 4.1 5.5 6.2 6.6 6.8 7.0 7.1 86.9 4.1 5.5 6.2 6.6 6.8 7.0 7.1