Grazing Occultation of 2349 SB1 Magnitude 2.9v 2349 = Al Niyat = sigma Scorpii Date 2005 December 28 (Wednesday) 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 114 0 0 -28 23 27 21 10 46 -4 23 108 2.34 202.9 194.39 20.10S 114 10 0 -28 30 34 21 10 57 -4 23 108 2.32 202.9 194.40 20.11S 114 20 0 -28 37 42 21 11 9 -4 24 107 2.29 202.9 194.41 20.12S 114 30 0 -28 44 51 21 11 20 -4 24 107 2.27 202.9 194.42 20.13S 114 40 0 -28 52 1 21 11 31 -3 24 107 2.25 203.0 194.43 20.14S 114 50 0 -28 59 12 21 11 43 -3 24 107 2.22 203.0 194.45 20.15S 115 0 0 -29 6 23 21 11 54 -3 24 107 2.20 203.0 194.46 20.16S 115 10 0 -29 13 36 21 12 6 -3 25 107 2.18 203.0 194.47 20.17S 115 20 0 -29 20 49 21 12 18 -2 25 107 2.16 203.0 194.48 20.18S 115 30 0 -29 28 4 21 12 30 -2 25 107 2.14 203.0 194.49 20.19S 115 40 0 -29 35 19 21 12 42 -2 25 106 2.12 203.0 194.50 20.20S 115 50 0 -29 42 34 21 12 54 -2 25 106 2.10 203.0 194.51 20.21S 116 0 0 -29 49 51 21 13 6 -2 26 106 2.08 203.0 194.52 20.22S 116 10 0 -29 57 9 21 13 18 -1 26 106 2.06 203.1 194.53 20.23S 116 20 0 -30 4 27 21 13 31 -1 26 106 2.04 203.1 194.54 20.24S 116 30 0 -30 11 46 21 13 43 -1 26 106 2.02 203.1 194.54 20.25S 116 40 0 -30 19 6 21 13 56 -1 27 106 2.00 203.1 194.55 20.26S 116 50 0 -30 26 26 21 14 9 0 27 105 1.98 203.1 194.56 20.27S 117 0 0 -30 33 47 21 14 21 0 27 105 1.96 203.1 194.57 20.28S 117 10 0 -30 41 9 21 14 34 0 27 105 1.94 203.1 194.58 20.28S 117 20 0 -30 48 32 21 14 47 0 27 105 1.93 203.1 194.59 20.29S 117 30 0 -30 55 55 21 15 1 0 28 105 1.91 203.1 194.59 20.30S 117 40 0 -31 3 19 21 15 14 1 28 105 1.89 203.1 194.60 20.31S 117 50 0 -31 10 43 21 15 27 1 28 105 1.87 203.1 194.61 20.31S Path coordinates are referred to WGS84 (as used by GPS). 2349 is multiple : 3.3 5.3 0.000" 0.0 : 3.0 5.1 0.40" 249.0 : 2.8 8.4 20.0" 273.0 Graze Path of component #2 0.00km South, and 0.0 secs. earlier cf. primary. Graze Path of component #3 0.62km North, and 0.5 secs. earlier cf. primary. Graze Path of component #4 15.28km North, and 35.0 secs. earlier cf. primary. 2349 = sig Sco, 2.86 to 2.94 V , Type BCEP, Period 0.2468390 days, Phase 0.78 Risetime = 3.0 hours Librations Long -5.49 Lat +5.09 P +194.2 D +6.6 Illumination of moon 6%- Elongation of Moon 30 Vertical Profile Scale 2.17 km/arcsec at mean distance of moon Horizontal Scale Factor 1.94 deg/min Limiting Magnitudes for various telescope apertures (in mm) CA\Tdia 50 100 150 200 250 300 350 16.3 3.6 5.0 5.7 6.1 6.3 6.5 6.6 18.3 3.6 5.0 5.7 6.1 6.3 6.5 6.6 20.3 3.6 5.0 5.7 6.1 6.3 6.5 6.6 22.3 3.6 5.0 5.7 6.1 6.3 6.5 6.6 24.3 3.6 5.0 5.7 6.1 6.3 6.5 6.6