Predictions for Grazing Occultation of ZC 2864, 2007 Aug 25

Grazing Occultation of    2864 dB8      Magnitude   4.6 
 2864 = 52 Sagittarii                         

Date   2007 August 25    (Saturday)     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
 172  0  0  -41 24 25   7 10 59       52  78  0.78 349.5 358.04   3.15N
 172 10  0  -41 25 29   7 11 17       52  77  0.78 349.4 358.00   3.11N
 172 20  0  -41 26 31   7 11 34       52  77  0.77 349.4 357.95   3.06N
 172 30  0  -41 27 33   7 11 52       53  77  0.77 349.3 357.90   3.01N
 172 40  0  -41 28 33   7 12  9       53  77  0.76 349.3 357.85   2.96N
 172 50  0  -41 29 32   7 12 27       53  76  0.76 349.2 357.80   2.91N
 173  0  0  -41 30 30   7 12 45       53  76  0.75 349.2 357.75   2.86N
 173 10  0  -41 31 26   7 13  2       53  76  0.75 349.1 357.70   2.81N
 173 20  0  -41 32 22   7 13 20       53  76  0.74 349.1 357.65   2.76N
 173 30  0  -41 33 16   7 13 38       54  75  0.74 349.0 357.60   2.71N
 173 40  0  -41 34  8   7 13 56       54  75  0.73 349.0 357.55   2.66N
 173 50  0  -41 35  0   7 14 14       54  75  0.73 348.9 357.50   2.61N
 174  0  0  -41 35 50   7 14 32       54  75  0.73 348.9 357.44   2.56N
 174 10  0  -41 36 39   7 14 49       54  74  0.72 348.8 357.39   2.50N

Path coordinates are referred to WGS84 (as used by GPS).

   2864 is double :   4.7  9.2   2.7"  171.0
Graze Path of component #2  5.20km North, and 0.3 secs. earlier cf. primary.

    C A S S I N I   R E G I O N   G R A Z E

                Librations  Long -5.35   Lat +4.61
                            P +357.0     D -4.1
      Illumination of moon  88%+
        Elongation of Moon  140
    Vertical Profile Scale  1.92 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.46 deg/min

Limiting Magnitudes for various telescope apertures (in mm)
      CA\Tdia  50   100   150   200   250   300   350
    -1.5      2.5   4.0   4.7   5.2   5.5   5.8   5.9
     0.5      2.5   4.0   4.7   5.2   5.5   5.8   5.9
     2.5      2.5   4.0   4.7   5.2   5.5   5.8   5.9
     4.5      3.6   5.0   5.8   6.3   6.6   6.8   7.0
     6.5      4.6   6.1   6.8   7.3   7.7   7.9   8.1

Lunar Limb Profile