Predictions for Grazing Occultation of ZC 2990, 2009 Jun 11

Grazing Occultation of    2990SK0      Magnitude 6.6 [Red = 6.0]   
Date: 2009 Jun 11 20h 30m,  to  2009 Jun 11 21h 15m

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
 134 30  0  -38 14 39  20 29 53       53 294  0.74 328.1 340.63  16.91N
 135  0  0  -37 50 50  20 31 19       53 292  0.75 328.1 340.58  16.96N
 135 30  0  -37 26 51  20 32 44       53 291  0.77 328.1 340.53  17.00N
 136  0  0  -37  2 43  20 34  9       52 290  0.78 328.0 340.49  17.05N
 136 30  0  -36 38 26  20 35 34       51 288  0.80 328.0 340.46  17.08N
 137  0  0  -36 14  1  20 36 58       51 287  0.81 327.9 340.42  17.11N
 137 30  0  -35 49 29  20 38 22       50 286  0.83 327.9 340.40  17.14N
 138  0  0  -35 24 52  20 39 45       50 285  0.84 327.9 340.37  17.16N
 138 30  0  -35  0 10  20 41  8       49 284  0.86 327.9 340.36  17.18N
 139  0  0  -34 35 24  20 42 30       49 283  0.88 327.9 340.34  17.19N
 139 30  0  -34 10 36  20 43 51       48 281  0.90 327.9 340.34  17.20N
 140  0  0  -33 45 45  20 45 11  -11  48 280  0.92 327.9 340.33  17.20N
 140 30  0  -33 20 55  20 46 31  -11  47 279  0.94 327.9 340.34  17.20N
 141  0  0  -32 56  4  20 47 49  -10  46 278  0.96 327.9 340.34  17.19N
 141 30  0  -32 31 15  20 49  7   -9  46 277  0.98 327.9 340.35  17.18N
 142  0  0  -32  6 28  20 50 24   -8  45 276  1.00 327.9 340.37  17.17N
 142 30  0  -31 41 44  20 51 39   -7  44 276  1.02 327.9 340.39  17.15N
 143  0  0  -31 17  5  20 52 53   -7  44 275  1.05 327.9 340.42  17.12N
 143 30  0  -30 52 31  20 54  6   -6  43 274  1.07 328.0 340.44  17.09N
 144  0  0  -30 28  2  20 55 18   -5  42 273  1.10 328.0 340.48  17.06N

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  2 meters

      2990 is triple: 
        DE  6.6      59" 106.0  Graze path of E 90.52 km north, and 99.7 secs later compared to D
        DA  6.6  4.8 258" 329.9  Graze path of A 529.48 km south, and 21.0 secs later compared to D

                Librations  Long -3.24   Lat -0.98
                            P +340.60     D +2.26
      Illumination of moon  86%-
        Elongation of Moon  136
    Vertical Profile Scale  2.16 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.55 deg/min


At longitude 144.50:
Limiting Magnitudes for various telescope apertures (in cm)
      CA\Tdia   5    10    15    20    25    30    35
    13.0      5.4   6.8   7.6   8.1   8.4   8.7   8.8
    15.0      5.4   6.8   7.6   8.1   8.4   8.7   8.8
    17.0      5.4   6.8   7.6   8.1   8.4   8.7   8.9
    19.0      5.4   6.9   7.6   8.1   8.5   8.7   8.9
    21.0      5.4   6.9   7.6   8.1   8.5   8.7   8.9

---

Lunar Limb Profile - Adelaide