Predictions for Grazing Occultation of ZC 1493, 2007 Apr 26

Grazing Occultation of    1493 cF7      Magnitude   6.5 
Date   2007 April 26    (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
 171  0  0  -41 44  4  10 51 22       26 322  2.02  38.3  19.24  16.74N
 171 10  0  -41 50 31  10 51 35       26 321  2.03  38.2  19.20  16.70N
 171 20  0  -41 56 57  10 51 48       26 321  2.05  38.2  19.15  16.65N
 171 30  0  -42  3 21  10 52  1       26 321  2.07  38.2  19.11  16.61N
 171 40  0  -42  9 43  10 52 14       26 321  2.09  38.1  19.06  16.56N
 171 50  0  -42 16  3  10 52 26       25 321  2.10  38.1  19.01  16.51N
 172  0  0  -42 22 21  10 52 39       25 320  2.12  38.0  18.97  16.47N
 172 10  0  -42 28 37  10 52 51       25 320  2.14  38.0  18.92  16.42N
 172 20  0  -42 34 51  10 53  4       25 320  2.16  37.9  18.87  16.37N
 172 30  0  -42 41  3  10 53 16       25 320  2.17  37.9  18.83  16.33N
 172 40  0  -42 47 13  10 53 28       25 320  2.19  37.8  18.78  16.28N
 172 50  0  -42 53 22  10 53 40       24 320  2.21  37.8  18.73  16.23N
 173  0  0  -42 59 28  10 53 52       24 319  2.23  37.7  18.68  16.19N
 173 10  0  -43  5 33  10 54  3       24 319  2.25  37.7  18.64  16.14N
 173 20  0  -43 11 36  10 54 15       24 319  2.27  37.6  18.59  16.09N
 173 30  0  -43 17 37  10 54 26       24 319  2.29  37.6  18.55  16.05N

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

   1493 is double :   6.4  7.3   0.032"  269.4
Graze Path of component #2  0.04km North, and 0.1 secs. earlier cf. primary.

                Librations  Long +5.11   Lat -2.16
                            P +18.4     D +3.9
      Illumination of moon  71%+
        Elongation of Moon  114
    Vertical Profile Scale  2.17 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.54 deg/min

Limiting Magnitudes for various telescope apertures (in mm)
      CA\Tdia  50   100   150   200   250   300   350
    12.0      5.3   6.7   7.4   7.9   8.2   8.4   8.5
    14.0      5.3   6.7   7.5   7.9   8.2   8.4   8.5
    16.0      5.3   6.7   7.5   7.9   8.2   8.4   8.6
    18.0      5.3   6.7   7.5   7.9   8.2   8.4   8.6
    20.0      5.3   6.8   7.5   7.9   8.2   8.4   8.6

Lunar Limb Profile

Lunar Limb Profile