Grazing Occultation of 2018 A1 Magnitude 6.6 Date 2007 January 12 (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 172 0 0 -41 35 46 16 31 21 -7 48 66 0.91 215.6 197.06 16.53S 172 10 0 -41 45 38 16 31 50 -7 48 65 0.91 215.6 197.05 16.52S 172 20 0 -41 55 28 16 32 19 -7 48 65 0.91 215.6 197.04 16.51S 172 30 0 -42 5 18 16 32 47 -7 48 64 0.90 215.6 197.02 16.49S 172 40 0 -42 15 6 16 33 16 -6 48 64 0.90 215.6 197.01 16.47S 172 50 0 -42 24 53 16 33 45 -6 48 64 0.89 215.6 196.99 16.46S 173 0 0 -42 34 38 16 34 14 -6 48 63 0.89 215.6 196.97 16.44S 173 10 0 -42 44 22 16 34 42 -5 48 63 0.89 215.5 196.96 16.42S 173 20 0 -42 54 5 16 35 11 -5 49 62 0.88 215.5 196.94 16.41S Path coordinates are referred to WGS84 (as used by GPS). Librations Long -2.96 Lat +4.29 P +196.7 D +5.2 Illumination of moon 39%- Elongation of Moon 77 Vertical Profile Scale 2.40 km/arcsec at mean distance of moon Horizontal Scale Factor 1.51 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 12.4 5.8 7.2 8.0 8.6 8.9 9.2 9.4 14.4 5.8 7.2 8.1 8.6 8.9 9.2 9.4 16.4 5.8 7.3 8.1 8.6 9.0 9.2 9.4 18.4 5.8 7.3 8.1 8.6 9.0 9.2 9.4 20.4 5.8 7.3 8.1 8.6 9.0 9.2 9.4