Predictions for Grazing Occultation of ZC 773, 2009 Aug 15
This occultation occurs in morning twilight.
Grazing Occultation of 773wF8 Magnitude 7.0 [Red = 6.7]
Date: 2009 Aug 15 18h 20m, to 2009 Aug 15 18h 23m
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
174 0 0 -38 59 48 18 19 39 -10 20 23 2.78 353.2 359.28 4.03N
174 10 0 -38 54 40 18 19 52 -10 20 23 2.76 353.2 359.30 4.00N
174 20 0 -38 49 34 18 20 6 -10 20 23 2.73 353.3 359.33 3.97N
174 30 0 -38 44 30 18 20 19 -10 20 22 2.71 353.3 359.36 3.94N
174 40 0 -38 39 27 18 20 33 -10 20 22 2.69 353.3 359.39 3.91N
174 50 1 -38 34 27 18 20 47 -9 21 22 2.67 353.4 359.43 3.88N
175 0 1 -38 29 29 18 21 1 -9 21 22 2.65 353.4 359.46 3.84N
175 10 1 -38 24 32 18 21 15 -9 21 22 2.63 353.4 359.49 3.81N
175 20 1 -38 19 38 18 21 29 -9 21 21 2.61 353.5 359.53 3.78N
175 30 1 -38 14 45 18 21 43 -9 21 21 2.59 353.5 359.56 3.74N
175 40 1 -38 9 55 18 21 57 -8 21 21 2.58 353.5 359.59 3.71N
175 50 1 -38 5 7 18 22 12 -8 21 21 2.56 353.6 359.63 3.67N
176 0 1 -38 0 21 18 22 26 -8 21 21 2.54 353.6 359.67 3.64N
176 10 2 -37 55 37 18 22 41 -8 22 21 2.52 353.6 359.70 3.60N
176 20 2 -37 50 55 18 22 55 -8 22 20 2.50 353.7 359.74 3.57N
176 30 2 -37 46 15 18 23 10 -7 22 20 2.49 353.7 359.78 3.53N
176 40 2 -37 41 37 18 23 25 -7 22 20 2.47 353.7 359.81 3.49N
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 1 meters
773 is double: AB 7.1 8.7 14.0" 352.0
Librations Long -4.50 Lat -5.31
P +359.96 D +5.61
Illumination of moon 28%-
Elongation of Moon 64
Vertical Profile Scale 3.86 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.45 deg/min
At longitude 175.33:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
-0.2 3.1 4.5 5.1 5.5 5.7 5.9 6.0
1.8 4.8 6.2 6.9 7.4 7.7 7.9 8.1
3.8 4.8 6.2 7.0 7.4 7.7 7.9 8.1
5.8 5.6 7.0 7.8 8.3 8.6 8.8 9.0
7.8 5.6 7.0 7.8 8.3 8.6 8.8 9.0
Lunar Limb Profile
