Predictions for Grazing Occultation of ZC 1888, 2007 Apr 30
Grazing Occultation of 1888 K5 Magnitude 6.0
1888 = 50 Virginis
Date 2007 April 30 (Monday) 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
150 0 0 -26 33 52 15 57 57 40 279 1.19 31.9 11.04 17.70N
150 10 0 -26 35 54 15 58 16 40 279 1.20 31.8 10.97 17.62N
150 20 0 -26 37 55 15 58 35 40 279 1.21 31.8 10.89 17.55N
150 30 0 -26 39 53 15 58 53 39 279 1.22 31.7 10.82 17.48N
150 40 0 -26 41 50 15 59 11 39 279 1.23 31.6 10.75 17.40N
150 50 0 -26 43 45 15 59 29 39 278 1.24 31.6 10.67 17.33N
151 0 0 -26 45 38 15 59 47 39 278 1.24 31.5 10.60 17.26N
151 10 0 -26 47 30 16 0 5 39 278 1.25 31.4 10.53 17.18N
151 20 0 -26 49 20 16 0 23 38 278 1.26 31.3 10.46 17.11N
151 30 0 -26 51 8 16 0 40 38 278 1.27 31.3 10.39 17.04N
151 40 0 -26 52 55 16 0 58 38 278 1.28 31.2 10.31 16.97N
151 50 0 -26 54 39 16 1 15 38 278 1.29 31.1 10.24 16.90N
152 0 0 -26 56 23 16 1 32 37 278 1.30 31.1 10.17 16.83N
152 10 0 -26 58 4 16 1 50 37 278 1.31 31.0 10.10 16.76N
152 20 0 -26 59 44 16 2 7 37 277 1.32 30.9 10.03 16.69N
152 30 0 -27 1 23 16 2 23 37 277 1.34 30.8 9.96 16.62N
152 40 0 -27 2 59 16 2 40 37 277 1.35 30.8 9.89 16.55N
152 50 0 -27 4 35 16 2 57 36 277 1.36 30.7 9.82 16.48N
153 0 0 -27 6 8 16 3 13 36 277 1.37 30.6 9.75 16.41N
153 10 0 -27 7 40 16 3 30 36 277 1.38 30.6 9.69 16.34N
153 20 0 -27 9 11 16 3 46 36 277 1.39 30.5 9.62 16.28N
Path coordinates are referred to WGS84 (as used by GPS).
Librations Long -0.58 Lat +3.87
P +9.6 D -3.7
Illumination of moon 97%+
Elongation of Moon 160
Vertical Profile Scale 1.86 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.45 deg/min
Limiting Magnitudes for various telescope apertures (in mm)
CA\Tdia 50 100 150 200 250 300 350
12.3 4.1 5.5 6.3 6.7 7.0 7.2 7.4
14.3 4.4 5.8 6.5 7.0 7.3 7.5 7.7
16.3 4.5 5.9 6.6 7.1 7.4 7.6 7.8
18.3 4.6 6.0 6.8 7.2 7.6 7.8 7.9
20.3 4.8 6.2 7.0 7.4 7.7 8.0 8.1
Lunar Limb Profile
