Predictions for Grazing Occultation of ZC 2771, 2009 Feb 20

Grazing Occultation of    2771cK2      Magnitude 5.6 [Red = 5.0]   
Date: 2009 Feb 20 17h  5m,  to  2009 Feb 20 17h  9m

Nominal site altitude 100m

E. Longit.   Latitude     U.T.    Sun  Moon   TanZ   PA    AA      CA
   o  '  "    o  '  "   h  m  s   Alt Alt Az          o     o      o
 171 30  0  -40 48 44  17  5  2  -12  33  96  1.56 176.6 181.43   4.56S
 171 40  0  -40 52  4  17  5 12  -11  33  96  1.55 176.6 181.40   4.53S
 171 50  0  -40 55 23  17  5 22  -11  33  96  1.54 176.6 181.37   4.50S
 172  0  0  -40 58 41  17  5 32  -11  33  96  1.53 176.5 181.34   4.47S
 172 10  0  -41  1 59  17  5 43  -11  33  95  1.52 176.5 181.31   4.45S
 172 20  1  -41  5 15  17  5 53  -11  33  95  1.51 176.5 181.29   4.42S
 172 30  1  -41  8 31  17  6  4  -11  34  95  1.50 176.5 181.26   4.39S
 172 40  1  -41 11 45  17  6 14  -10  34  95  1.49 176.4 181.23   4.36S
 172 50  1  -41 14 59  17  6 25  -10  34  95  1.49 176.4 181.20   4.33S
 173  0  1  -41 18 12  17  6 35  -10  34  95  1.48 176.4 181.17   4.30S
 173 10  1  -41 21 24  17  6 46  -10  34  95  1.47 176.3 181.15   4.28S
 173 20  1  -41 24 35  17  6 56  -10  34  94  1.46 176.3 181.12   4.25S
 173 30  1  -41 27 45  17  7  7  -10  35  94  1.45 176.3 181.09   4.22S
 173 40  2  -41 30 54  17  7 18   -9  35  94  1.44 176.3 181.06   4.19S
 173 50  2  -41 34  3  17  7 29   -9  35  94  1.43 176.2 181.03   4.16S
 174  0  2  -41 37 10  17  7 39   -9  35  94  1.42 176.2 181.00   4.13S
 174 10  2  -41 40 17  17  7 50   -9  35  93  1.41 176.2 180.97   4.10S
 174 20  2  -41 43 22  17  8  1   -9  35  93  1.41 176.1 180.94   4.07S
 174 30  2  -41 46 27  17  8 12   -9  36  93  1.40 176.1 180.91   4.04S
 174 40  2  -41 49 30  17  8 23   -8  36  93  1.39 176.1 180.88   4.01S
 174 50  2  -41 52 33  17  8 34   -8  36  93  1.38 176.0 180.85   3.98S
 175  0  3  -41 55 35  17  8 45   -8  36  93  1.37 176.0 180.82   3.95S

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  3 meters

      2771 is double: AB  6.5  6.5 0.10" 113.0

                Librations  Long +0.41   Lat +2.55
                            P +181.14     D +2.80
      Illumination of moon  17%-
        Elongation of Moon  48
    Vertical Profile Scale  1.97 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.59 deg/min


At longitude 173.33:
Limiting Magnitudes for various telescope apertures (in cm)
      CA\Tdia   5    10    15    20    25    30    35
     0.2      5.2   6.7   7.5   8.0   8.3   8.6   8.8
     2.2      5.3   6.7   7.5   8.0   8.4   8.7   8.9
     4.2      5.3   6.8   7.6   8.1   8.4   8.7   8.9
     6.2      5.3   6.8   7.6   8.1   8.5   8.7   9.0
     8.2      6.2   7.7   8.5   9.1   9.5   9.8  10.0

Lunar Limb Profile