Predictions for Grazing Occultation of ZC 3370, 2009 May 18
Grazing Occultation of 3370cG8 Magnitude 6.2 [Red = 5.8]
Date: 2009 May 18 17h 49m, to 2009 May 18 18h 15m
Nominal site altitude 5m
E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA
o ' " o ' " h m s Alt Alt Az o o o
135 0 0 -36 5 13 17 49 33 21 77 2.62 329.9 351.31 8.64N
135 30 0 -36 0 48 17 49 57 21 77 2.56 329.7 351.18 8.77N
136 0 0 -35 56 14 17 50 22 22 76 2.50 329.6 351.05 8.90N
136 30 0 -35 51 30 17 50 47 22 76 2.43 329.5 350.92 9.03N
137 0 0 -35 46 37 17 51 13 23 76 2.37 329.3 350.78 9.17N
137 30 0 -35 41 35 17 51 40 23 75 2.32 329.2 350.64 9.31N
138 0 0 -35 36 23 17 52 7 24 75 2.26 329.0 350.51 9.44N
138 30 0 -35 31 0 17 52 35 24 75 2.21 328.9 350.37 9.58N
139 0 0 -35 25 28 17 53 4 25 74 2.16 328.8 350.23 9.72N
139 30 0 -35 19 46 17 53 33 25 74 2.11 328.6 350.09 9.86N
140 0 0 -35 13 53 17 54 3 26 73 2.06 328.5 349.95 10.01N
140 30 0 -35 7 49 17 54 33 26 73 2.01 328.3 349.80 10.15N
141 0 0 -35 1 36 17 55 5 27 73 1.97 328.2 349.65 10.30N
141 30 0 -34 55 11 17 55 37 27 72 1.92 328.0 349.51 10.45N
142 0 0 -34 48 35 17 56 10 28 72 1.88 327.9 349.36 10.60N
142 30 0 -34 41 48 17 56 43 29 71 1.84 327.7 349.20 10.75N
143 0 0 -34 34 50 17 57 18 29 71 1.80 327.6 349.05 10.90N
143 30 0 -34 27 40 17 57 53 30 71 1.76 327.4 348.91 11.05N
144 0 0 -34 20 19 17 58 29 30 70 1.72 327.3 348.75 11.20N
144 30 0 -34 12 46 17 59 6 31 70 1.68 327.1 348.59 11.36N
145 0 0 -34 5 0 17 59 43 31 69 1.65 327.0 348.43 11.52N
145 30 0 -33 57 3 18 0 22 32 69 1.61 326.8 348.27 11.68N
146 0 0 -33 48 53 18 1 1 32 69 1.58 326.6 348.11 11.84N
146 30 0 -33 40 30 18 1 42 33 68 1.54 326.5 347.95 12.01N
147 0 0 -33 31 54 18 2 23 34 68 1.51 326.3 347.78 12.17N
147 30 0 -33 23 5 18 3 5 34 67 1.48 326.1 347.61 12.34N
148 0 0 -33 14 3 18 3 48 35 67 1.44 326.0 347.44 12.51N
148 30 0 -33 4 47 18 4 32 35 67 1.41 325.8 347.27 12.68N
149 0 0 -32 55 18 18 5 17 36 66 1.38 325.6 347.10 12.86N
149 30 0 -32 45 34 18 6 2 36 66 1.35 325.5 346.92 13.03N
150 0 0 -32 35 35 18 6 49 37 65 1.32 325.3 346.75 13.21N
150 30 0 -32 25 23 18 7 37 38 65 1.29 325.1 346.57 13.39N
151 0 0 -32 14 55 18 8 26 38 64 1.27 324.9 346.39 13.57N
151 30 0 -32 4 12 18 9 16 39 64 1.24 324.7 346.20 13.75N
152 0 0 -31 53 14 18 10 7 40 63 1.21 324.6 346.02 13.94N
152 30 0 -31 41 59 18 11 0 40 63 1.18 324.4 345.83 14.12N
153 0 0 -31 30 29 18 11 53 41 62 1.16 324.2 345.64 14.31N
153 30 0 -31 18 43 18 12 48 41 62 1.13 324.0 345.45 14.50N
154 0 0 -31 6 39 18 13 43 42 61 1.11 323.8 345.26 14.69N
154 30 0 -30 54 19 18 14 40 43 61 1.08 323.6 345.07 14.89N
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
3370 is double:
AB 6.2 0.13" 148.6 Graze path of B 0.25 km north, and 0.0 secs earlier compared to A
Librations Long -5.81 Lat -4.63
P +349.09 D +5.95
Illumination of moon 35%-
Elongation of Moon 73
Vertical Profile Scale 1.90 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.57 deg/min
At longitude 144.50:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
7.4 5.8 7.2 8.0 8.5 8.9 9.1 9.3
9.4 5.8 7.2 8.0 8.5 8.9 9.2 9.4
11.4 5.8 7.2 8.0 8.6 8.9 9.2 9.4
13.4 5.8 7.3 8.1 8.6 8.9 9.2 9.4
15.4 5.8 7.3 8.1 8.6 9.0 9.2 9.4
Lunar Limb Profile - Adelaide
Lunar Limb Profile - Sydney
