Grazing Occultation of 810 SB7 Magnitude 1.6 810 = El Nath = beta Tauri Date 2005 October 21 (Friday) 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 112 0 0 -21 55 25 21 3 46 37 342 1.32 177.0 179.98 4.38S 112 10 0 -21 56 43 21 4 19 37 341 1.33 177.1 180.09 4.49S 112 20 0 -21 58 5 21 4 52 -12 37 341 1.33 177.2 180.19 4.59S 112 30 0 -21 59 31 21 5 25 -12 37 341 1.34 177.3 180.30 4.70S 112 40 0 -22 1 0 21 5 58 -11 37 340 1.35 177.4 180.40 4.80S 112 50 0 -22 2 33 21 6 31 -11 36 340 1.35 177.5 180.50 4.91S 113 0 0 -22 4 10 21 7 4 -11 36 340 1.36 177.6 180.61 5.01S 113 10 0 -22 5 50 21 7 36 -10 36 339 1.36 177.7 180.71 5.11S 113 20 0 -22 7 34 21 8 8 -10 36 339 1.37 177.8 180.81 5.21S 113 30 0 -22 9 22 21 8 40 -10 36 339 1.38 177.9 180.91 5.31S 113 40 0 -22 11 13 21 9 12 -10 36 339 1.38 178.0 181.01 5.41S 113 50 0 -22 13 7 21 9 44 -9 36 338 1.39 178.1 181.11 5.51S 114 0 0 -22 15 5 21 10 16 -9 36 338 1.40 178.2 181.21 5.61S 114 10 0 -22 17 7 21 10 47 -9 35 338 1.40 178.3 181.31 5.71S 114 20 0 -22 19 12 21 11 18 -8 35 337 1.41 178.4 181.40 5.80S 114 30 0 -22 21 20 21 11 49 -8 35 337 1.42 178.5 181.50 5.90S 114 40 0 -22 23 32 21 12 20 -8 35 337 1.43 178.6 181.60 6.00S 114 50 0 -22 25 47 21 12 50 -8 35 337 1.43 178.7 181.69 6.09S 115 0 0 -22 28 6 21 13 21 -7 35 336 1.44 178.8 181.78 6.18S 115 10 0 -22 30 27 21 13 51 -7 35 336 1.45 178.9 181.88 6.28S 115 20 0 -22 32 52 21 14 21 -7 34 336 1.46 179.0 181.97 6.37S 115 30 0 -22 35 20 21 14 51 -7 34 335 1.46 179.1 182.06 6.46S 115 40 0 -22 37 52 21 15 21 -6 34 335 1.47 179.2 182.15 6.55S 115 50 0 -22 40 26 21 15 50 -6 34 335 1.48 179.2 182.24 6.64S 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 0.00km South, and 0.3 secs. earlier cf. primary. Graze Path of component #3 48.09km North, and 89.6 secs. earlier cf. primary. C A S S I N I R E G I O N G R A Z E Librations Long +5.24 Lat -7.08 P +181.6 D -7.0 Illumination of moon 79%- Elongation of Moon 126 Vertical Profile Scale 2.94 km/arcsec at mean distance of moon Horizontal Scale Factor 1.19 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 2.6 3.5 4.9 5.6 6.1 6.4 6.6 6.7 4.6 4.5 6.0 6.7 7.2 7.5 7.7 7.9 6.6 4.8 6.3 7.0 7.5 7.8 8.0 8.2 8.6 5.4 6.8 7.6 8.1 8.4 8.6 8.8 10.6 5.4 6.8 7.6 8.1 8.4 8.6 8.8