Predictions for Grazing Occultation of ZC 2366, 2008 Oct 4

Grazing Occultation of    2366 dM1      Magnitude   1.1v
 2366 = Antares = alpha Scorpii               

Date   2008 October  4    (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
 136  0  0  -33 58 49  12 36 43       13 247  4.21 176.6 167.39  14.85S
 136 10  0  -33 53 34  12 36 48       13 247  4.27 176.6 167.40  14.84S
 136 20  0  -33 48 18  12 36 53       13 247  4.33 176.6 167.39  14.85S
 136 30  0  -33 43  3  12 36 58       13 247  4.39 176.6 167.39  14.85S
 136 40  0  -33 37 47  12 37  3       13 247  4.45 176.6 167.38  14.86S
 136 50  0  -33 32 31  12 37  7       12 246  4.52 176.6 167.38  14.86S
 137  0  0  -33 27 15  12 37 12       12 246  4.59 176.6 167.38  14.87S
 137 10  0  -33 21 58  12 37 17       12 246  4.66 176.6 167.37  14.87S
 137 20  0  -33 16 42  12 37 21       12 246  4.73 176.6 167.37  14.88S
 137 30  0  -33 11 26  12 37 26       12 246  4.80 176.6 167.36  14.88S
 137 40  0  -33  6  9  12 37 30       12 246  4.88 176.6 167.36  14.88S
 137 50  0  -33  0 52  12 37 35       11 246  4.95 176.6 167.36  14.89S
 138  0  0  -32 55 35  12 37 39       11 246  5.03 176.6 167.35  14.89S
 138 10  0  -32 50 18  12 37 43       11 246  5.12 176.6 167.35  14.89S
 138 20  0  -32 45  1  12 37 48       11 245  5.20 176.6 167.35  14.90S
 138 30  0  -32 39 44  12 37 52       11 245  5.29 176.6 167.34  14.90S
 138 40  0  -32 34 27  12 37 56       11 245  5.38 176.6 167.34  14.90S
 138 50  0  -32 29 10  12 38  0       10 245  5.48 176.6 167.34  14.91S
 139  0  0  -32 23 53  12 38  4       10 245  5.57 176.6 167.33  14.91S
 139 10  0  -32 18 35  12 38  8       10 245  5.67 176.6 167.33  14.91S
 139 20  0  -32 13 18  12 38 11       10 245  5.78 176.6 167.33  14.91S
 139 30  0  -32  8  1  12 38 15       10 245  5.89 176.6 167.33  14.92S
 139 40  0  -32  2 43  12 38 19        9 245  6.00 176.6 167.32  14.92S
 139 50  0  -31 57 26  12 38 22        9 245  6.12 176.6 167.32  14.92S
 140  0  0  -31 52  8  12 38 26        9 244  6.24 176.6 167.32  14.92S

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

   2366 is double :   0.9  5.4   2.5"  273.7
Graze Path of component #2  0.60km South, and 4.8 secs. earlier cf. primary.

   2366 = alf Sco,   0.88 to  1.16 V ,  Type LC

                Librations  Long -0.08   Lat +5.73
                            P +167.3     D +5.8
      Illumination of moon  24%+
        Elongation of Moon  58
    Vertical Profile Scale  2.04 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.98 deg/min

Limiting Magnitudes for various telescope apertures (in mm)
      CA\Tdia  50   100   150   200   250   300   350
    10.9      5.3   6.8   7.5   8.0   8.3   8.5   8.7
    12.9      5.4   6.8   7.6   8.1   8.4   8.6   8.8
    14.9      5.4   6.9   7.6   8.1   8.4   8.7   8.8
    16.9      5.5   6.9   7.7   8.2   8.5   8.7   8.9
    18.9      5.5   7.0   7.7   8.2   8.6   8.8   9.0
    

Lunar Limb Profile