Predictions for Grazing Occultation of ZC 2644, 2007 Feb 13
Grazing Occultation of 2644 cF8 Magnitude 6.4
Date 2007 February 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
148 0 0 -33 21 46 17 28 55 22 110 2.46 187.2 188.78 12.81S
148 10 0 -33 27 33 17 29 3 22 110 2.44 187.2 188.78 12.81S
148 20 0 -33 33 20 17 29 12 22 110 2.42 187.2 188.77 12.80S
148 30 0 -33 39 6 17 29 20 23 110 2.39 187.2 188.76 12.79S
148 40 0 -33 44 52 17 29 29 23 110 2.37 187.2 188.75 12.78S
148 50 0 -33 50 37 17 29 38 23 110 2.35 187.2 188.74 12.77S
149 0 0 -33 56 22 17 29 46 23 109 2.33 187.2 188.73 12.76S
149 10 0 -34 2 7 17 29 55 23 109 2.31 187.2 188.72 12.75S
149 20 0 -34 7 51 17 30 4 24 109 2.29 187.1 188.71 12.74S
149 30 0 -34 13 35 17 30 13 24 109 2.27 187.1 188.70 12.73S
149 40 0 -34 19 18 17 30 22 24 109 2.25 187.1 188.69 12.72S
149 50 0 -34 25 1 17 30 31 24 109 2.23 187.1 188.68 12.71S
150 0 0 -34 30 43 17 30 40 24 109 2.21 187.1 188.67 12.70S
150 10 0 -34 36 25 17 30 49 25 109 2.19 187.1 188.66 12.69S
150 20 0 -34 42 7 17 30 58 25 108 2.17 187.1 188.65 12.68S
150 30 0 -34 47 48 17 31 8 25 108 2.15 187.1 188.64 12.67S
150 40 0 -34 53 28 17 31 17 25 108 2.13 187.1 188.63 12.66S
150 50 0 -34 59 8 17 31 26 25 108 2.11 187.1 188.62 12.65S
Path coordinates are referred to WGS84 (as used by GPS).
2644 is double : 7.1 7.1 0.100" 90.0
Graze Path of component #2 0.02km South, and 0.2 secs. later cf. primary.
Librations Long -5.97 Lat +6.12
P +188.0 D +7.2
Illumination of moon 18%-
Elongation of Moon 51
Vertical Profile Scale 2.01 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.87 deg/min
Limiting Magnitudes for various telescope apertures (in mm)
CA\Tdia 50 100 150 200 250 300 350
8.7 6.1 7.6 8.4 8.9 9.3 9.6 9.8
10.7 6.1 7.6 8.4 9.0 9.4 9.6 9.9
12.7 6.2 7.7 8.5 9.0 9.4 9.7 9.9
14.7 6.2 7.7 8.5 9.1 9.5 9.8 10.0
16.7 6.3 7.8 8.6 9.1 9.5 9.8 10.0
Lunar Limb Profile
