Predictions for Grazing Occultation of ZC 1637, 2009 Apr 7
Grazing Occultation of 1637 K0 Magnitude 5.9 [Red = 5.4]
R1637 = 76 Leonis
Date: 2009 Apr 07 9h 55m, to 2009 Apr 07 10h 0m
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
172 0 0 -40 29 52 9 54 56 46 20 0.95 38.5 16.57 20.78N
172 10 0 -40 39 16 9 55 24 46 19 0.96 38.5 16.55 20.76N
172 20 0 -40 48 39 9 55 52 46 19 0.96 38.5 16.53 20.75N
172 30 0 -40 58 1 9 56 21 46 18 0.96 38.5 16.52 20.73N
172 40 0 -41 7 21 9 56 49 46 18 0.96 38.5 16.50 20.71N
172 50 1 -41 16 40 9 57 17 46 17 0.97 38.4 16.48 20.69N
173 0 1 -41 25 58 9 57 44 46 17 0.97 38.4 16.46 20.67N
173 10 1 -41 35 14 9 58 12 46 16 0.97 38.4 16.44 20.65N
173 20 1 -41 44 29 9 58 40 46 16 0.98 38.4 16.42 20.63N
173 30 1 -41 53 42 9 59 7 46 16 0.98 38.4 16.40 20.61N
173 40 1 -42 2 54 9 59 34 46 15 0.98 38.3 16.38 20.59N
173 50 1 -42 12 4 10 0 2 45 15 0.99 38.3 16.36 20.57N
174 0 1 -42 21 12 10 0 29 45 14 0.99 38.3 16.34 20.55N
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
Librations Long +3.79 Lat +3.87
P +16.68 D -2.38
Illumination of moon 94%+
Elongation of Moon 152
Vertical Profile Scale 2.51 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.49 deg/min
At longitude 173.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
16.7 5.0 6.5 7.2 7.7 8.1 8.3 8.5
18.7 5.4 6.9 7.6 8.1 8.5 8.7 8.9
20.7 5.4 6.9 7.6 8.1 8.5 8.7 8.9
22.7 5.4 6.9 7.7 8.2 8.5 8.7 8.9
24.7 5.4 6.9 7.7 8.2 8.5 8.7 8.9
Lunar Limb Profile
