Grazing Occultation of 1263 DF0 Magnitude 6.9 Date 2005 April 17 (Sunday) Nominal site altitude 1000m E. Longit. Latitude U.T. Sun Moon TanZ PA WA CA o ' o ' h m s Alt Alt Az o o o -118 30.0 34 58.1 3 51 32 71 242 0.34 27.3 14.02 13.05N -118 26.0 34 55.8 3 51 42 71 242 0.34 27.4 14.04 13.07N -118 22.0 34 53.5 3 51 52 71 242 0.34 27.4 14.06 13.10N -118 18.0 34 51.1 3 52 3 71 242 0.34 27.4 14.09 13.12N -118 14.0 34 48.8 3 52 13 71 243 0.35 27.4 14.11 13.14N -118 10.0 34 46.5 3 52 24 71 243 0.35 27.4 14.13 13.16N -118 6.0 34 44.1 3 52 34 71 243 0.35 27.5 14.15 13.18N -118 2.0 34 41.7 3 52 45 71 244 0.35 27.5 14.18 13.21N -117 58.0 34 39.4 3 52 55 71 244 0.35 27.5 14.20 13.23N -117 54.0 34 37.0 3 53 6 71 244 0.35 27.5 14.22 13.25N -117 50.0 34 34.6 3 53 16 71 244 0.35 27.6 14.24 13.27N -117 46.0 34 32.3 3 53 27 70 245 0.35 27.6 14.26 13.29N -117 42.0 34 29.9 3 53 37 70 245 0.36 27.6 14.29 13.32N -117 38.0 34 27.5 3 53 48 70 245 0.36 27.6 14.31 13.34N -117 34.0 34 25.1 3 53 58 70 245 0.36 27.6 14.33 13.36N -117 30.0 34 22.7 3 54 9 70 246 0.36 27.7 14.35 13.38N Path coordinates are referred to WGS84 (as used by GPS). 1263 is double : 6.5 7.3 5.4" 50.0 Graze Path of component #2 9.18km South, and 6.2 secs. later cf. primary. Librations Long -0.76 Lat -6.48 P +14.4 D +6.3 Illumination of moon 55%+ Elongation of Moon 96 Vertical Profile Scale 1.93 km/arcsec at mean distance of moon Horizontal Scale Factor 1.28 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 9.4 5.9 7.4 8.2 8.7 9.1 9.4 9.6 11.4 5.9 7.4 8.2 8.7 9.1 9.4 9.6 13.4 5.9 7.4 8.2 8.8 9.1 9.4 9.7 15.4 5.9 7.4 8.2 8.8 9.2 9.4 9.7 17.4 5.9 7.4 8.2 8.8 9.2 9.5 9.7