Grazing Occultation of 537SB6 Magnitude 3.7 [Red = 3.8] S R537 = Electra = 17 Tauri Date: 2009 Aug 14 8h 34m, to 2009 Aug 14 8h 37m Nominal site altitude 5m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' o ' h m s Alt Alt Az o o o -123 0.00 37 9.23 8 33 58 16 71 3.54 341.7 355.22 6.13N -122 54.00 37 13.00 8 34 3 16 71 3.52 341.7 355.21 6.15N -122 48.00 37 16.77 8 34 7 16 72 3.49 341.7 355.20 6.15N -122 42.00 37 20.55 8 34 12 16 72 3.47 341.7 355.19 6.16N -122 36.00 37 24.34 8 34 17 16 72 3.44 341.7 355.19 6.16N -122 30.00 37 28.13 8 34 22 16 72 3.42 341.6 355.18 6.17N -122 24.00 37 31.93 8 34 26 16 72 3.39 341.6 355.18 6.17N -122 18.00 37 35.73 8 34 31 17 72 3.37 341.6 355.17 6.18N -122 12.00 37 39.54 8 34 36 17 72 3.35 341.6 355.17 6.19N -122 6.00 37 43.36 8 34 41 17 72 3.32 341.6 355.16 6.19N -122 0.00 37 47.18 8 34 46 17 72 3.30 341.6 355.16 6.20N -121 54.00 37 51.00 8 34 51 17 72 3.28 341.6 355.15 6.20N -121 48.00 37 54.83 8 34 56 17 72 3.25 341.6 355.15 6.21N -121 42.00 37 58.67 8 35 1 17 72 3.23 341.6 355.14 6.21N -121 36.00 38 2.51 8 35 6 17 73 3.21 341.6 355.13 6.22N -121 30.00 38 6.36 8 35 11 17 73 3.19 341.6 355.13 6.22N -121 24.00 38 10.21 8 35 16 18 73 3.17 341.6 355.12 6.23N -121 18.00 38 14.07 8 35 21 18 73 3.15 341.6 355.12 6.23N -121 12.00 38 17.93 8 35 27 18 73 3.13 341.6 355.11 6.24N -121 6.00 38 21.80 8 35 32 18 73 3.11 341.6 355.11 6.24N -121 0.00 38 25.67 8 35 37 18 73 3.08 341.6 355.11 6.25N -120 54.00 38 29.55 8 35 42 18 73 3.06 341.6 355.10 6.25N -120 48.00 38 33.43 8 35 48 18 73 3.04 341.6 355.10 6.26N -120 42.00 38 37.32 8 35 53 18 73 3.03 341.6 355.09 6.26N -120 36.00 38 41.21 8 35 58 18 73 3.01 341.5 355.09 6.27N -120 30.00 38 45.11 8 36 4 19 73 2.99 341.5 355.08 6.27N -120 24.00 38 49.01 8 36 9 19 74 2.97 341.5 355.08 6.27N -120 18.00 38 52.92 8 36 15 19 74 2.95 341.5 355.07 6.28N -120 12.00 38 56.83 8 36 20 19 74 2.93 341.5 355.07 6.28N -120 6.00 39 0.75 8 36 26 19 74 2.91 341.5 355.06 6.29N -120 0.00 39 4.67 8 36 31 19 74 2.89 341.5 355.06 6.29N Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. Projected diameter of star 1 meters 537 = NSV 15755, 3.70V 537 is triple: AB 3.9 7.0 0.005" 350.0 : AB 3.9 7.5 0.20" 117.0 Librations Long -5.49 Lat -5.25 P +355.65 D +5.95 Illumination of moon 43%- Elongation of Moon 82 Vertical Profile Scale 2.52 km/arcsec at mean distance of moon Horizontal Scale Factor 2.09 deg/min At longitude -121.50: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 2.2 4.5 5.9 6.6 7.0 7.3 7.5 7.6 4.2 5.3 6.7 7.4 7.8 8.1 8.3 8.5 6.2 5.3 6.7 7.4 7.9 8.1 8.3 8.5 8.2 5.3 6.7 7.4 7.9 8.2 8.4 8.5 10.2 5.3 6.7 7.4 7.9 8.2 8.4 8.5 Results of Observer Scan UT Site Long. Lat. Dist. h m s Armstrong -123.0 38.6 123km 8 33 58 cabrillo -121.9 37.0 72km 8 34 49 Carrizo Caliente campsite -119.9 35.1 349km 8 36 39 PonderosaCamp -121.4 36.0 189km 8 35 17