Predictions for Grazing Occultation of ZC 1550, 2008 May 13

Grazing Occultation of    1550 DA2      Magnitude   5.6e
 1550 = TX Leonis = 49 Leonis                 

Date   2008 May 13    (Tuesday)     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
 143  0  0  -34 39 24   8  6  0    -7 42  31  1.12  38.2  18.14  16.58N
 143 10  0  -34 49 15   8  6 32    -7 42  31  1.12  38.2  18.17  16.61N
 143 20  0  -34 59  8   8  7  4    -7 42  30  1.12  38.3  18.19  16.63N
 143 30  0  -35  9  3   8  7 36    -8 42  30  1.12  38.3  18.22  16.66N
 143 40  0  -35 19  0   8  8  8    -8 42  29  1.13  38.3  18.24  16.68N
 143 50  0  -35 29  0   8  8 40    -8 42  29  1.13  38.3  18.26  16.70N
 144  0  0  -35 39  1   8  9 12    -8 42  28  1.13  38.3  18.28  16.72N
 144 10  0  -35 49  5   8  9 44    -9 42  28  1.13  38.4  18.30  16.74N
 144 20  0  -35 59 10   8 10 16    -9 42  28  1.13  38.4  18.32  16.76N
 144 30  0  -36  9 17   8 10 48    -9 41  27  1.13  38.4  18.33  16.77N
 144 40  0  -36 19 25   8 11 20   -10 41  27  1.13  38.4  18.35  16.79N
 144 50  0  -36 29 36   8 11 52   -10 41  26  1.13  38.4  18.36  16.80N
 145  0  0  -36 39 48   8 12 24   -10 41  26  1.14  38.4  18.38  16.82N
 145 10  0  -36 50  1   8 12 56   -10 41  25  1.14  38.5  18.39  16.83N
 145 20  0  -37  0 16   8 13 27   -11 41  25  1.14  38.5  18.40  16.84N
 145 30  0  -37 10 32   8 13 59   -11 41  25  1.14  38.5  18.41  16.85N
 145 40  0  -37 20 49   8 14 31   -11 41  24  1.15  38.5  18.42  16.87N
 145 50  0  -37 31  7   8 15  3   -11 41  24  1.15  38.5  18.43  16.87N
 146  0  0  -37 41 27   8 15 34   -12 41  23  1.15  38.5  18.44  16.88N
 146 10  0  -37 51 48   8 16  6       41  23  1.15  38.5  18.45  16.89N
 146 20  0  -38  2  9   8 16 37       41  22  1.16  38.5  18.46  16.90N
 146 30  0  -38 12 32   8 17  9       41  22  1.16  38.5  18.46  16.90N
 146 40  0  -38 22 55   8 17 40       41  22  1.16  38.5  18.47  16.91N
 146 50  0  -38 33 19   8 18 12       41  21  1.16  38.5  18.47  16.91N
 147  0  0  -38 43 43   8 18 43       41  21  1.17  38.5  18.47  16.91N

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

   1550 is double :   5.8  7.9   2.1"  157.0
Graze Path of component #2  2.74km North, and 4.9 secs. later cf. primary.

   1550 = TX Leo,   5.66 to  5.75 V ,  Type EA/DM,  Period 2.4450566 days,  Phase 0.08   Eclipse duration = 6.5 hours

                Librations  Long +6.98   Lat +0.87
                            P +18.6     D +1.6
      Illumination of moon  62%+
        Elongation of Moon  104
    Vertical Profile Scale  2.77 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.39 deg/min

Limiting Magnitudes for various telescope apertures (in mm)
      CA\Tdia  50   100   150   200   250   300   350
    12.9      5.7   7.1   7.9   8.4   8.8   9.0   9.2
    14.9      5.7   7.1   7.9   8.4   8.8   9.1   9.2
    16.9      5.7   7.2   7.9   8.5   8.8   9.1   9.3
    18.9      5.7   7.2   8.0   8.5   8.8   9.1   9.3
    20.9      5.7   7.2   8.0   8.5   8.8   9.1   9.3

Lunar Limb Profile