Predictions for Grazing Occultation of ZC 320, 2009 Aug 12

Grazing Occultation of     320cM3      Magnitude 5.7 [Red = 4.8]  v
   R320 = 15 Arietis
Date: 2009 Aug 12 16h 40m,  to  2009 Aug 12 17h 13m

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
 135  0  0  -36 52 51  16 40 36       19  46  2.95 329.2 349.00   9.94N
 135 30  0  -36 34 43  16 41  3       19  46  2.86 329.0 348.90  10.05N
 136  0  0  -36 16 24  16 41 32       20  45  2.77 328.9 348.79  10.15N
 136 30  0  -35 57 52  16 42  1       20  45  2.68 328.8 348.69  10.26N
 137  0  0  -35 39  9  16 42 31       21  44  2.60 328.7 348.58  10.36N
 137 30  0  -35 20 13  16 43  2       22  44  2.53 328.6 348.48  10.47N
 138  0  0  -35  1  4  16 43 35       22  44  2.45 328.5 348.37  10.57N
 138 30  0  -34 41 44  16 44  8       23  43  2.38 328.4 348.27  10.68N
 139  0  0  -34 22 11  16 44 42       23  43  2.31 328.3 348.16  10.78N
 139 30  0  -34  2 25  16 45 18       24  42  2.25 328.2 348.06  10.89N
 140  0  0  -33 42 27  16 45 54       25  42  2.18 328.1 347.95  10.99N
 140 30  0  -33 22 17  16 46 32       25  41  2.12 328.0 347.85  11.10N
 141  0  0  -33  1 54  16 47 11       26  41  2.06 327.9 347.75  11.20N
 141 30  0  -32 41 18  16 47 51       26  40  2.01 327.8 347.65  11.30N
 142  0  0  -32 20 30  16 48 33       27  40  1.95 327.7 347.54  11.40N
 142 30  0  -31 59 29  16 49 16       28  40  1.90 327.6 347.44  11.50N
 143  0  0  -31 38 15  16 49 59       28  39  1.85 327.5 347.34  11.60N
 143 30  0  -31 16 49  16 50 45       29  39  1.80 327.4 347.24  11.70N
 144  0  0  -30 55 11  16 51 31       30  38  1.75 327.3 347.15  11.80N

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  8 meters

       320 = AV Ari, 5.68 to 5.76Hp, Type SRS
       320 is double: 
       AB  6.7  6.7 0.10"  90.0  Graze path of B 0.12 km north, and 0.2 secs later compared to A

                Librations  Long -6.03   Lat -7.23
                            P +347.76     D +8.66
      Illumination of moon  61%-
        Elongation of Moon  103
    Vertical Profile Scale  2.17 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.49 deg/min


At longitude 144.50:
Limiting Magnitudes for various telescope apertures (in cm)
      CA\Tdia   5    10    15    20    25    30    35
     7.9      5.5   7.0   7.7   8.2   8.5   8.8   8.9
     9.9      5.5   7.0   7.7   8.2   8.5   8.8   8.9
    11.9      5.5   7.0   7.7   8.2   8.6   8.8   9.0
    13.9      5.6   7.0   7.8   8.2   8.6   8.8   9.0
    15.9      5.6   7.0   7.8   8.3   8.6   8.8   9.0

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Lunar Limb Profile - Adelaide