Predictions for Grazing Occultation of ZC 900, 2009 Dec 3

Grazing Occultation of     900cB1      Magnitude 4.8 [Red = 4.9]   
   R900 = 139 Tauri
Date: 2009 Dec 03 15h 11m,  to  2009 Dec 03 15h 59m

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
 144  0  0  -32 42 44  15 35 14       32 359  1.63 187.5 189.00  16.04S
 144 30  0  -32 49 38  15 36 30       31 358  1.64 187.7 189.19  16.24S
 145  0  0  -32 57  0  15 37 46       31 357  1.65 187.9 189.38  16.43S
 145 30  0  -33  4 50  15 39  2       31 357  1.66 188.0 189.57  16.61S
 146  0  0  -33 13  6  15 40 16       31 356  1.67 188.2 189.76  16.80S
 146 30  0  -33 21 50  15 41 30       31 355  1.69 188.4 189.94  16.98S
 147  0  0  -33 31  0  15 42 44       30 354  1.70 188.6 190.11  17.15S
 147 30  0  -33 40 36  15 43 57       30 353  1.72 188.8 190.29  17.33S
 148  0  0  -33 50 38  15 45  8       30 352  1.73 188.9 190.45  17.49S
 148 30  0  -34  1  4  15 46 19       30 352  1.75 189.1 190.62  17.66S
 149  0  0  -34 11 55  15 47 29       29 351  1.77 189.3 190.78  17.82S
 149 30  0  -34 23 10  15 48 38       29 350  1.79 189.4 190.93  17.97S
 150  0  0  -34 34 48  15 49 46       29 349  1.82 189.6 191.08  18.12S
 150 30  0  -34 46 49  15 50 53       29 349  1.84 189.7 191.23  18.27S
 151  0  0  -34 59 12  15 51 59       28 348  1.87 189.9 191.37  18.41S
 151 30  0  -35 11 57  15 53  4       28 347  1.89 190.0 191.51  18.55S
 152  0  0  -35 25  2  15 54  8       27 346  1.92 190.1 191.64  18.68S
 152 30  0  -35 38 28  15 55 10       27 346  1.95 190.2 191.77  18.80S
 153  0  0  -35 52 14  15 56 11       27 345  1.98 190.4 191.89  18.93S
 153 30  0  -36  6 18  15 57 11       26 344  2.02 190.5 192.01  19.04S
 154  0  0  -36 20 41  15 58 10       26 343  2.05 190.6 192.12  19.16S

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 meter

       900 is double: 
       AB  5.6  5.6 0.060" 221.0  Graze path of B 0.19 km north, and 0.1 secs earlier compared to A

                Librations  Long -1.75   Lat -3.40
                            P +189.30     D -2.81
      Illumination of moon  97%-
        Elongation of Moon  162
    Vertical Profile Scale  3.52 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.37 deg/min


At longitude 144.50:
Limiting Magnitudes for various telescope apertures (in cm)
      CA\Tdia   5    10    15    20    25    30    35
    12.2      3.5   4.9   5.6   6.1   6.4   6.5   6.7
    14.2      4.2   5.7   6.4   6.8   7.1   7.3   7.5
    16.2      4.3   5.7   6.4   6.8   7.1   7.3   7.5
    18.2      4.3   5.7   6.4   6.9   7.1   7.3   7.5
    20.2      4.3   5.7   6.4   6.9   7.2   7.4   7.5

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Lunar Limb Profile - Canberra and Sydney