Predictions for Grazing Occultation of ZC 263, 2008 Aug 21

Grazing Occultation of     263 cA9      Magnitude   6.6v
Date   2008 August 21    (Thursday)     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
 115  0  0  -32 41 59  20 11 24       40 358  1.19 325.4 346.06  10.69N
 115 10  0  -32 32 51  20 11 51       40 358  1.19 325.4 346.07  10.68N
 115 20  0  -32 23 44  20 12 18       40 357  1.18 325.4 346.08  10.67N
 115 30  0  -32 14 37  20 12 46       40 357  1.18 325.4 346.09  10.66N
 115 40  0  -32  5 32  20 13 13       41 357  1.17 325.4 346.11  10.64N
 115 50  0  -31 56 27  20 13 40       41 356  1.16 325.5 346.12  10.63N
 116  0  0  -31 47 24  20 14  8       41 356  1.16 325.5 346.14  10.61N
 116 10  0  -31 38 22  20 14 36       41 355  1.15 325.5 346.15  10.60N
 116 20  0  -31 29 20  20 15  4       41 355  1.15 325.5 346.17  10.58N
 116 30  0  -31 20 20  20 15 31       41 355  1.14 325.5 346.19  10.56N
 116 40  0  -31 11 22  20 15 59       41 354  1.14 325.5 346.21  10.54N
 116 50  0  -31  2 24  20 16 27       41 354  1.13 325.6 346.23  10.53N
 117  0  0  -30 53 28  20 16 56       42 354  1.13 325.6 346.25  10.51N
 117 10  0  -30 44 33  20 17 24       42 353  1.12 325.6 346.27  10.48N
 117 20  0  -30 35 40  20 17 52       42 353  1.12 325.6 346.29  10.46N
 117 30  0  -30 26 48  20 18 21       42 353  1.11 325.6 346.31  10.44N
 117 40  0  -30 17 58  20 18 49       42 352  1.11 325.7 346.34  10.41N
 117 50  0  -30  9  9  20 19 17       42 352  1.11 325.7 346.36  10.39N
 118  0  0  -30  0 22  20 19 46       42 351  1.10 325.7 346.39  10.36N
 118 10  0  -29 51 37  20 20 15       42 351  1.10 325.7 346.41  10.34N
 118 20  0  -29 42 53  20 20 43       42 351  1.09 325.8 346.44  10.31N
 118 30  0  -29 34 12  20 21 12       43 350  1.09 325.8 346.47  10.28N
 118 40  0  -29 25 32  20 21 41       43 350  1.09 325.8 346.50  10.25N
 118 50  0  -29 16 54  20 22 10       43 349  1.08 325.9 346.53  10.22N
 119  0  0  -29  8 18  20 22 39       43 349  1.08 325.9 346.56  10.19N

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

    263 is double :   7.3  7.3   0.050"    0.0
Graze Path of component #2  0.11km South, and 0.1 secs. later cf. primary.

    263 = VY Psc,   6.54 to  6.59 V ,  Type DSCTC

                Librations  Long -3.36   Lat -7.20
                            P +347.0     D +8.0
      Illumination of moon  73%-
        Elongation of Moon  118
    Vertical Profile Scale  2.65 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.35 deg/min

Limiting Magnitudes for various telescope apertures (in mm)
      CA\Tdia  50   100   150   200   250   300   350
     6.2      5.2   6.7   7.4   7.9   8.3   8.5   8.7
     8.2      5.6   7.0   7.8   8.3   8.7   8.9   9.1
    10.2      5.6   7.0   7.8   8.3   8.7   8.9   9.1
    12.2      5.6   7.0   7.8   8.3   8.7   8.9   9.1
    14.2      5.6   7.1   7.8   8.4   8.7   8.9   9.1

Lunar Limb Profile